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? 2005 microchip technology inc. ds21977a-page 1 mcp9805 features ? meets jedec standard jc42.4 ? temperature-to-digital converter ? accuracy with 0.25 c/lsb resolution: - 1c (max.) from +75c to +95c - 2c (max.) from +40c to +125c - 3c (max.) from -20c to +125c ? programmable temperature monitor boundary ? critical temperature output ? operating voltage range: 3.0v to 3.6v ? 2-wire interface: smbus/standard i 2 c? compatible ? operating current: 200 a (typ.) ? shutdown current: 0.1 a (typ.) ? available packages: 2x3 dfn-8, tssop-8 typical applications ? dual in-line memory module (dimm) ? personal computers (pcs) and servers ? hard disk drives and other pc peripherals ? general purpose temperature sensor typical application description microchip technology inc.?s mcp9805 digital tempera- ture sensor converts temperatures between -40c and +125c to a digital word. this sensor is designed to meet the jedec standard jc42.4 for mobile platform memory module thermal sensor. this device provides an accuracy of 1c (max.) from a temperature range of +75c to +95c (active range) and 2c (max.) from +40c to +125c (monitor range) as defined in the jedec standard. the mcp9805 comes with user-programmable registers that provide flexibility for dimm temperature-sensing applications. the registers allow user-selectable settings such as shutdown or low-power modes and the specification of tempera- ture event and critical output boundaries. when the temperature changes beyond the specified boundary limits, the mcp9805 outputs an event signal. the user has the option of setting the event output signal polarity as either an active-low or active-high comparator output for thermostat operation, or as a temperature event interrupt output for microprocessor-based systems. the event output can also be configured as a critical temperature output. this sensor has a 2-wire industry-standard smbus and standard i 2 c compatible (100 khz bus clock) serial interface protocol, allowing up to eight sensors to be controlled in a single serial bus. these features make the mcp9805 ideal for sophisticated multi-zone temperature-monitoring applications. package types memory memory module spd * temperature sensor eeprom mcp9805 3.3 v dd_spd sda sclk r r event * serial presence detect sda gnd event sclk 8-pin dfn (2x3) a0 v dd a1 a2 1 2 3 4 8 7 6 5 sda gnd event sclk mcp9805 1 2 3 4 8-pin tssop a0 v dd a1 a2 8 7 6 5 memory module digital temperature sensor
mcp9805 ds21977a-page 2 ? 2005 microchip technology inc. 1.0 electrical characteristics absolute maximum ratings ? v dd ....................................................................... 6.0v voltage at all input/output pins .... gnd ? 0.3v to 5.5v storage temperature ..........................-65c to +150c ambient temp. with power applied .....-40c to +125c junction temperature (t j )................................ +150c esd protection on all pins (hbm:mm)....... (4 kv:200v) latch-up current at each pin ........................ 200 ma ?notice: stresses above those listed under ?maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this sp ecification is not implied. exposure to maximum rating conditions for extended periods may affect device reliability. dc characteristics electrical specifications: unless otherwise indicated, v dd = 3.0v to 3.6v, gnd = ground and t a = -20c to +125c. parameters sym min typ max unit conditions power supply operating voltage range v dd 3.0 ? 3.6 v operating current i dd ? 200 500 a continuous operation shutdown current i shdn ? 0.1 2 a shutdown mode power-on reset threshold (por) v por ?2.2?vv dd falling edge power supply rejection psr dc ?0.3?c psr ac ? 0.5 ? c v dd = 3.3v + 150 mvpp (0 to 1 mhz), t a = +25c temperature sensor accuracy accuracy with 0.25 c/lsb resolution: +75c to +95c t acy -1.0 0.5 +1.0 c active temp. range +40c to +125c t acy -2.0 1.0 +2.0 c monitor temp. range -20c to +125c t acy -3.0 2.0 +3.0 c t a = -40c t acy ?2?c internal ? adc conversion time (10-bits + sign): 0.25 c/lsb t conv ? 65 125 ms 17 samples/sec. (typ.) event output (open-drain) high-level current (leakage) i oh ?? 1av oh = 3.6v low-level voltage v ol ??0.4vi ol = 3 ma thermal response response time: dfn t res ? 0.7 ? s time to 63% of +22c (air) to +125c (oil bath) tssop t res ?1.5?s
? 2005 microchip technology inc. ds21977a-page 3 mcp9805 graphical symbol description digital input/output pin characteristics electrical specifications: unless otherwise indicated, v dd = 3.0v to 3.6v, gnd = ground and t a = -20c to +125c. parameters sym min typ max units conditions serial input/output (sclk, sda, a0, a1, a2) input high-level voltage v ih 2.1 ? ? v low-level voltage v il ??0.8v input current i in ??5a output (sda) low-level voltage v ol ??0.4vi ol = 3 ma high-level current (leakage) i oh ??1av oh = 3.6v low-level current i ol 6??mav ol = 0.6v capacitance c in ?5?pf sda and sclk inputs hysteresis v hyst ?0.5?v v dd v ih v il i in voltage current time time v dd i oh voltage current time time sda & sclk inputs sda output v ol i ol
mcp9805 ds21977a-page 4 ? 2005 microchip technology inc. timing diagram serial interface ti ming characteristics electrical specifications: unless otherwise indicated, v dd = 3.0v to 3.6v, gnd = ground, t a = -20c to +125c, c l = 80 pf and all limits measured to 50% point. parameters sym min typ max units conditions 2-wire smbus/standard mode i 2 c? compatible interface (note 1) serial port clock frequency f sc 10 ? 100 khz low clock t low 4.7 ? ? s high clock t high 4.0 ? ? s rise time t r ? ? 1000 ns (v il max - 0.15v) to (v ih min + 0.15v) fall time t f ? ? 300 ns (v ih min + 0.15v) to (v il max - 0.15v) data setup before sclk high t su-data 250 ? ? ns data hold after sclk low t hd-data 300 ? ? ns start condition setup time t su-start 4.7 ? ? s start condition hold time t hd-start 4.0 ? ? s stop condition setup time t su-stop 4.0 ? ? s bus free t b-free 4.7 ? ? s time out t out 25 40 50 ms note 1: the serial interface specification min./max. limits are specified by characterization (not production tested). t su-start t h-start t su-data t su-stop t b-free sclk sda t h-data t high t low t out t r , t f start condition data transmission stop condition temperature characteristics electrical specifications: unless otherwise indicated, v dd = 3.0v to 3.6v, gnd = ground. parameters sym min typ max units conditions temperature ranges specified temperature range t a -20 ? +125 c operating temperature range t a -40 ? +125 c note 1 storage temperature range t a -65 ? +150 c thermal package resistances thermal resistance, 8l-dfn ja ?41?c/w thermal resistance, 8l-tssop ja ? 123.7 ? c/w note 1: operation in this range must not cause t j to exceed maximum junction temperature (+150c).
? 2005 microchip technology inc. ds21977a-page 5 mcp9805 2.0 typical performance curves note: unless otherwise noted: v dd = 3.0v to 3.6v, gnd = ground, c de_cap = 0.1 f figure 2-1: average temperature accuracy. figure 2-2: temperature accuracy histogram, t a = +95c. figure 2-3: temperature accuracy histogram, t a = +75c. figure 2-4: supply current vs. ambient temperature. figure 2-5: shutdown current vs. ambient temperature. figure 2-6: power-on reset threshold voltage vs. ambient temperature. note: the graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. the performance characteristics listed herein are not tested or guaranteed. in some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 -40 -20 0 20 40 60 80 100 120 t a (c) temperature accuracy (c) v dd = 3.3v to 3.6v spec. limits 0% 10% 20% 30% 40% 50% 60% 70% -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 0.75 1.00 temperature accuracy (c) occurrences t a = +95c v dd = 3.3v 120 samples 0% 10% 20% 30% 40% 50% 60% 70% -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 0.75 1.00 temperature accuracy (c) occurrences t a = +75c v dd = 3.3v 120 samples 100 150 200 250 300 350 400 450 500 -40-20 0 20406080100120 t a (c) i dd (a) v dd = 3.3v to 3.6v 0.00 0.50 1.00 1.50 2.00 -40-20 0 20406080100120 t a (c ) i shdn (a) v dd = 3.3v to 3.6v 0 0.5 1 1.5 2 2.5 3 -40-20 0 20406080100120 t a (c) v por (v)
mcp9805 ds21977a-page 6 ? 2005 microchip technology inc. note: unless otherwise noted: v dd = 3.0v to 3.6v, gnd = ground, c de_cap = 0.1 f. figure 2-7: event and sda v ol vs. ambient temperature. figure 2-8: conversion rate vs. ambient temperature. figure 2-9: power supply rejection vs. frequency. figure 2-10: sda iol vs. ambient temperature. figure 2-11: temperature accuracy vs. v dd . figure 2-12: package thermal response. 0 0.1 0.2 0.3 0.4 -40-20 0 20406080100120 t a (c) event & sda v ol (v) event, v dd = 3.0v to 3.6v sda, v dd = 3.0v v dd = 3.3v v dd = 3.6v i ol = 3ma 35 50 65 80 95 110 125 -40 -20 0 20 40 60 80 100 120 t a (c) t conv (ms) v dd = 3.0v to 3.6v -1.0 -0.5 0.0 0.5 1.0 100 1,000 10,000 100,000 1,000,000 frequency (hz) normalized temp. error (c) psr ac , v dd = 3.3v + 150mv pp (ac) t a = 25c 100 1k 10k 100k 1m 100k 1m 10k 100k 1m 1k 10k 100k 1m 1k 10k 100k 1m t a = +25c no decoupling capacitor 6 12 18 24 30 36 42 48 -40-20 0 20406080100120 t a (c) sda i ol (ma) v dd = 3.6v v dd = 3.0v v dd = 3.3v v ol = 0.6v -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 -40-20 0 20406080100120 t a (c) temperature accuracy (c) v dd = 3.0v v dd = 3.6v psr dc = 0.3c/v 0% 20% 40% 60% 80% 100% 120% -2 0 2 4 6 8 10121416 time (s) thermal response (%) 22c (air) to +125c (oil bath) tssop-8 dfn-8
? 2005 microchip technology inc. ds21977a-page 7 mcp9805 3.0 pin description the descriptions of the pins are listed in table 3-1. table 3-1: pin function tables 3.1 slave address pins (a0, a1, a2 ) a0, a1 and a2 are device slave address input pins. the address pins correspond to the least significant bits (lsbs) of the address byte (see section 5.1.4 ?address byte? ). the most significant bits a6, a5, a4, a3 are factory set. this is shown in table 3-2. 3.2 ground pin (gnd) the gnd pin is the system ground pin. 3.3 open-drain serial data line (sda) sda is a bidirectional input/output pin, used to serially transmit data to/from the host controller. this pin requires a pull-up resistor. (see section 5.0 ?serial communication? ). 3.4 open-drain serial clock line (sclk) the sclk is a clock input pin. all communication and timing is relative to the signal on this pin. the clock is generated by the host or master controller on the bus. (see section 5.0 ?serial communication? ). 3.5 open-drain temperature event output pin (event) the mcp9805 event pin is an open-drain output. the device outputs a signal when the ambient temperature goes beyond the user-programmed temperature limit. (see section 4.2.3 ?event output configuration? ). 3.6 power pin (v dd ) v dd is the power pin. the operating voltage range, as specified in the dc electrical specification table, is applied on this pin. dfn/tssop symbol pin function 1 a0 slave address 2 a1 slave address 3 a2 slave address 4 gnd ground 5 sda serial data line 6 sclk serial clock line 7 event temperature event output 8v dd power table 3-2: mcp9805 address byte device address code slave address a6 a5 a4 a3 a2 a1 a0 mcp9805 0 0 1 1 x x x note: user-selectable address is shown by x.
mcp9805 ds21977a-page 8 ? 2005 microchip technology inc. 4.0 functional description the mcp9805 temperature sensors consist of a band gap temperature sensor, a delta-sigma, analog-to-digi- tal converter ( ? adc) and user-programmable registers using a 2-wire smbus/standard i 2 c compatible serial interface protocol. figure 4-1 shows a block diagram of the register structure. figure 4-1: register structure block diagram. clear event output interrupt temperature register (t a ) temperature upper-boundary (t upper ) temperature lower-boundary (t lower ) configuration register ? adc band gap temperature sensor event output status enable/disable event output critical event output only event output polarity, active-high/low critical temperature limit (t crit ) device capability register measurement resolution measurement accuracy temperature event output register pointer smbus/standard i 2 c? interface critical boundary trip lock event boundary window lock bit continuous conversion or shutdown event output hysteresis manufacturer identification register device identification and revision register event output comparator/interrupt measurement range v dd gnd sda sclk a2 event a0 a1
? 2005 microchip technology inc. ds21977a-page 9 mcp9805 4.1 registers the mcp9805 has several registers that are user-accessible. these registers include the capability register, configuration register, event temperature upper-boundary and lower-boundary trip registers, critical temperature trip register, temperature regis- ter, manufacturer identification register and device identification register. the temperature register is read-only, used to access the ambient temperature data. the data is loaded in parallel to this register after t conv . the event temperature upper-boundary and lower-boundary trip registers are read/writes. if the ambient tempera- ture drifts beyond the user-specified limits, the mcp9805 outputs a signal using the event pin (refer to section 4.2.3 ?event output configuration? ). in addition, the critical temperature trip register is used to provide an additional critical temperature limit. the capability register is used to provide bits describing the mcp9805?s capability in measurement resolution, measurement range and device accuracy. the device configuration register provides access to configure the mcp9805?s various features. these registers are described in further detail in the following sections. the registers are accessed by sending a register pointer to the mcp9805 using the serial interface. this is an 8-bit write-only pointer. however, the three least significant bits (3-lsbs) are used as pointers and all unused bits (bits 7-3) need to be cleared or set to ? 0 ?. register 4-1 describes the pointer or the address of each register. register 4-1: register address pointer (write-only) w-0 w-0 w-0 w-0 w-0 w-0 w-0 w-0 0000 0 p2 p1 p0 bit 7 bit 0 bit 7-3 writable bits: write ? 0 ? bits 7-3 must always be cleared or written to ? 0 ?. this device has additional registers that are reserved for test and calibration. if these registers are accessed, the device may not perform according to the specification. bit 2-0 pointer bits: 000 = capability register 001 = configuration register (config) 010 = event temperature upper-boundary trip register (t upper ) 011 = event temperature lower-boundary trip register (t lower ) 100 = critical temperature trip register (t crit ) 101 = temperature register (t a ) 110 = manufacturer id register 111 = device id/revision register legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
mcp9805 ds21977a-page 10 ? 2005 microchip technology inc. 4.1.1 capability register this is a read-only register used to identify the temper- ature sensor capability. in this case, the mcp9805 is capable of providing temperature at 0.25c resolution, measuring temperature below and above 0c, providing 1c and 2c accuracy over the active and monitor temperature ranges (respectively) and provid- ing user-programmable temperature event boundary trip limits. register 4-2 describes the capability register. these functions are described in further detail in the following sections. register 4-2: capability register (read-only) address ?0000 0000?b bit 15-5 unimplemented: read as ? 0 ? bit 4-3 resolution bits: 00 = 0.5 c/lsb 01 = 0.25 c/lsb (default resolution) 10 = 0.125 c/lsb 11 = 0.0625 c/lsb bit 2 temperature measurement range (meas. range) bit: 0 =t a = 0x0000 (hexadecimal) for temperature below 0c 1 = the part can measure temperature below 0c bit 1 accuracy bit: 0 =accuracy 2c from +75c to +95c (active range) and 3c from +40c to +125c (monitor range) 1 =accuracy 1c from +75c to +95c (active range) and 2c from +40c to +125c (monitor range) bit 0 basic capability (temp. event) bit: 0 = no defined function (this bit will never be cleared or set to ?0?). 1 = the part has temperature boundary trip limits (t upper /t lower /t crit registers) and a temperautre event output (jc 42.4 required feature). upper-half: u-0 u-0 u-0 u-0 u-0 u-0 u-0 u-0 ?? ?????? bit 15 bit 8 lower-half: u-0 u-0 u-0 r-0 r-1 r-1 r-1 r-1 ? resolution meas. range accuracy temp. event bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
? 2005 microchip technology inc. ds21977a-page 11 mcp9805 4.1.2 sensor configuration register (config) the mcp9805 has a 16-bit configuration register (config) that allows the user to set various functions for a robust temperature monitoring system. bits 10 thru 0 are used to select event output boundary hyster- esis, device shutdown or low-power mode, tempera- ture boundary and critical temperature lock, temperature event output enable/disable. in addition, the user can select the event output condition (output set for t upper and t lower temperature boundary or t crit only), read event output status and set event output polarity and mode (comparator output or inter- rupt output mode). the temperature hysteresis bits 10 and 9 can be used to prevent output chatter when the ambient tempera- ture gradually changes beyond the user-specified temperature boundary (see section 4.2.2 ?tempera- ture hysteresis (t hyst )? . the continuous conversion or shutdown mode is selected using bit 8. in shutdown mode, the band gap temperature sensor circuit stops converting temperature and the ambient temperature register (t a ) holds the previous successfully converted temperature data (see section 4.2.1 ?shutdown mode? ). bits 7 and 6 are used to lock the user-specified boundaries t upper , t lower and t crit to prevent an accidental rewrite. bits 5 thru 0 are used to configure the temperature event output pin. all functions are described in register 4-3 (see section 4.2.3 ?event output configuration? ). register 4-3: configuration register (config) address ?0000 0001?b bit 15-11 unimplemented: read as ? 0 ? bit 10-9 limit hysteresis (t hyst ) bits: 00 = 0c (power-up default) 01 = 1.5c 10 = 3.0c 11 = 6.0c (refer to section 4.2.3 ?event output configuration? ) bit 8 shutdown mode (shdn) bit: 0 = continuous conversion (power-up default) 1 = shutdown (low-power mode) in shutdown, all power-consuming activities are disabled, though all registers can be written to or read. this bit cannot be set ? 1 ? when either of the lock bits is set (bit 6 and bit 7). however, it can be cleared ? 0 ? for continuous conversion while locked. (refer to section 4.2.1 ?shutdown mode? ) bit 7 t crit lock bit (crit. lock) bit: 0 = unlocked. t crit register can be written. (power-up default) 1 = locked. t crit register cannot be written to. when enabled, this bit remains set ? 1 ? or locked until cleared by internal reset ( section 4.3 ?summary of power-up default? ). this bit does not require a double-write. . upper-half: u-0 u-0 u-0 u-0 u-0 r/w-0 r/w-0 r/w-0 ?? ??? t hyst shdn bit 15 bit 8 lower-half: r/w-0 r/w-0 r/w-0 r-0 r/w-0 r/w-0 r/w-0 r/w-0 crit. lock win. lock int. clear event stat. event cnt. event sel. event pol. event mod. bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
mcp9805 ds21977a-page 12 ? 2005 microchip technology inc. bit 6 t upper and t lower boundary window lock (win. lock) bit: 0 = unlocked. t upper and t lower registers can be written. (power-up default) 1 = locked. t upper and t lower registers cannot be written. when enabled, this bit remains set ? 1 ? or locked until cleared by internal reset ( section 4.3 ?summary of power-up default? ). this bit does not require a double-write. bit 5 interrupt clear (int. clear) bit: 0 = no effect. (power-up default) 1 = clear interrupt output. when read this bit returns ? 0 ?. bit 4 event output status (event stat.) bit: 0 = event output is not asserted by the device. (power-up default) 1 = event output is asserted as a comparator/interrupt or critical temperature output. bit 3 event output control (event cnt.) bit: 0 = disabled. (power-up default) 1 = enabled. this bit can not be altered when either of the lock bits is set (bit 6 and bit 7). bit 2 event output select (event sel.) bit: 0 = event output for t upper , t lower and t crit . (power-up default) 1 =t a t crit only. (t upper and t lower temperature boundaries are disabled.) when the alarm window lock bit is set ? 1 ? (bit 6), this bit cannot be altered until unlocked. bit 1 event output polarity (event pol.) bit: 0 = active-low. (power-up default) 1 = active-high. this bit cannot be altered when either of the lock bits is set (bit 6 and bit 7). bit 0 event output mode (event mod.) bit: 0 = comparator output. (power-up default) 1 = interrupt output. this bit cannot be altered when either of the lock bits is set (bit 6 and bit 7). register 4-3: configuration register (config) address ?0000 0001?b (continued) . upper-half: u-0 u-0 u-0 u-0 u-0 r/w-0 r/w-0 r/w-0 ?? ??? t hyst shdn bit 15 bit 8 lower-half: r/w-0 r/w-0 r/w-0 r-0 r/w-0 r/w-0 r/w-0 r/w-0 crit. lock win. lock int. clear event stat. event cnt. event sel. event pol. event mod. bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
? 2005 microchip technology inc. ds21977a-page 13 mcp9805 4.1.3 temperature event upper/lower/critical boundary trip registers (t upper /t lower /t crit ) the mcp9805 has a 16-bit read/write event output temperature upper-boundary trip register (t upper ), a 16-bit lower-boundary trip register (t lower ) and a 16-bit critical boundary trip register (t crit ) that contains 11-bit data in two?s compliment format (0.25 c/lsb). this data represents the maximum and minimum temperature boundary or temperature window that can be used to monitor ambient tempera- ture. if this feature is enabled ( section 4.1.2 ?sensor configuration register (config)? ) and the ambient temperature exceeds the specified boundary or window, the mcp9805 asserts an event output. (refer to section 4.2.3 ?event output configuration? ). register 4-4: upper/lower/critical temperature boundary trip registers (t upper /t lower /t crit ) address ?0000 0010?b/?0000 0011?b/?0000 0100?b bit 15-13 unimplemented: read as ? 0 ? bit 12 sign bit: 0 =t a 0c 1 =t a < 0c bit 11-2 t upper /t lower /t crit bits: temperature boundary trip data in two?s compliment format. bit 1-0 unimplemented: read as ? 0 ? note: this table reflects the three 16-bit registers t upper , t lower and t crit located at address ?0000 0010?b, ?0000 0011?b and ?0000 0100?b, respectively (see register 4-1). upper-half: u-0 u-0 u-0 r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 ???sign2 7 c/lsb 2 6 c/lsb 2 5 c/lsb 2 4 c/lsb bit 15 bit 8 lower-half: r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 u-0 u-0 2 3 c/lsb 2 2 c/lsb 2 1 c/lsb 2 0 c/lsb 2 -1 c/lsb 2 -2 c/lsb ? ? bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? -n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
mcp9805 ds21977a-page 14 ? 2005 microchip technology inc. 4.1.4 ambient temperature register (t a ) the mcp9805 uses a band gap temperature sensor circuit to output analog voltage proportional to absolute temperature. an internal ? adc is used to convert the analog voltage to a digital word. the converter resolu- tion is set to 0.25 c/lsb + sign (11-bit data). the digital word is loaded to a 16-bit read-only ambient tempera- ture register (t a ) that contains 11-bit temperature data in two?s complement format. the t a register bits (bits 12 thru 0) are double-buffered. therefore, the user can access the register while, in the background, the mcp9805 performs an analog-to-dig- ital conversion of the band gap temperature sensor. the temperature data from the ? adc is loaded in parallel to t a at t conv refresh rate. the t a magnitude in decimal to ambient temperature conversion is shown in equation 4-1: equation 4-1: decimal code to temperature conversion in addition, the t a register uses three bits (bits 15, 14 and 13) to reflect the event pin state. this allows the user to identify the cause of the event output trigger (see section 4.2.3 ?event output configuration? ); bit 15 is set to ? 1 ? if t a is greater than or equal to t crit , bit 14 is set to ? 1 ? if t a is greater than t upper and bit 13 is set to ? 1 ? if t a is less than t lower . the t a register bit assignment and boundary conditions are described in register 4-5. t a code 2 2 ? = where: t a = ambient temperature (c) code = mcp9805 output magnitude in decimal register 4-5: ambient temperature register (t a ) address ?0000 0101?b bit 15 t a vs. t crit (1) bit: 0 =t a < t crit 1 =t a t crit bit 14 t a vs. t upper (1) bit: 0 =t a t upper 1 =t a > t upper bit 13 t a vs. t lower (1) bit: 0 =t a t lower 1 =t a < t lower bit 12 sign bit: 0 =t a 0c 1 =t a < 0c note 1: not affected by the status of the event output configuration (bits 5 to 0 of config) and t hyst = 0c, register 4-3. 2: bit 1 may remain set ?1? for some devices indicating 2 -3 c/lsb or 0.125c temperature resolution, depending on the state of the device calibration code. upper-half: r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 t a vs. t crit t a vs. t upper t a vs. t lower sign 2 7 c/lsb 2 6 c/lsb 2 5 c/lsb 2 4 c/lsb bit 15 bit 8 lower-half: r-0 r-0 r-0 r-0 r-0 r-0 u-0 u-0 2 3 c/lsb 2 2 c/lsb 2 1 c/lsb 2 0 c/lsb 2 -1 c/lsb 2 -2 c/lsb ? (2) ? bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? -n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
? 2005 microchip technology inc. ds21977a-page 15 mcp9805 bit 11-2 ambient temperature (t a ) bits: 10-bit ambient temperature data in two?s compliment format. bit 1, 0 unimplemented: read as ? 0 ? (note 2) register 4-5: ambient temperature register (t a ) address ?0000 0101?b (continued) note 1: not affected by the status of the event output configuration (bits 5 to 0 of config) and t hyst = 0c, register 4-3. 2: bit 1 may remain set ?1? for some devices indicating 2 -3 c/lsb or 0.125c temperature resolution, depending on the state of the device calibration code. upper-half: r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 t a vs. t crit t a vs. t upper t a vs. t lower sign 2 7 c/lsb 2 6 c/lsb 2 5 c/lsb 2 4 c/lsb bit 15 bit 8 lower-half: r-0 r-0 r-0 r-0 r-0 r-0 u-0 u-0 2 3 c/lsb 2 2 c/lsb 2 1 c/lsb 2 0 c/lsb 2 -1 c/lsb 2 -2 c/lsb ? (2) ? bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? -n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
mcp9805 ds21977a-page 16 ? 2005 microchip technology inc. 4.1.5 manufacturer id register this register is used to identify the device manufacturer in order to perform manufacturer-specific operations. the manufacturer id for the mcp9805 is 0x0054 (hexadecimal). 4.1.6 device id and revision register the upper byte of this register is used to specify the device identification and the lower byte is used to specify device revision. the device id for the mcp9805 is 0x00 (hex). the revision begins with 0x00 (hex) for the first release, with the number being incremented as revised versions are released. register 4-1: manufacturer id register (read-only) address ?0000 0110?b upper-half: r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 manufacturer id bit 15 bit 8 lower-half: r-0 r-1 r-0 r-1 r-0 r-1 r-0 r-0 manufacturer id bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown register 4-2: device id and device revision (read-only) address ?0000 0111?b upper-half: r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 device id bit 15 bit 8 lower-half: r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 device revision bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as ?0? - n = value at por ?1? = bit is set ?0? = bit is cleared x = bit is unknown
? 2005 microchip technology inc. ds21977a-page 17 mcp9805 4.2 sensor feature description 4.2.1 shutdown mode shutdown mode disables all power-consuming activities (including temperature sampling operations) while leaving the serial interface active. this mode is selected by setting bit 8 of config to ? 1 ?. in this mode, the device consumes i shdn . it remains in this mode until bit 8 is cleared ? 0 ? to enable continuous conversion mode, or until power is recycled. the shutdown bit (bit 8) cannot be set to ? 1 ? while bits 6 and 7 of config (lock bits) are set to ? 1 ?. however, it can be cleared ? 0 ? or returned to continuous conversion while locked. in shutdown mode, all registers can be read or written. however, the serial bus activity increases the shutdown current. in addition, if the device is shutdown while the event pin is asserted as active-low or deasserted active-low (see section 4.2.3.1 ?comparator mode? and section 4.2.3.2 ?interrupt mode? ), the device will retain the active-low state. this increases the shutdown current due to the additional event output pull-down current. 4.2.2 temperature hysteresis (t hyst ) a hysteresis of 0c, 1.5c, 3c or 6c can be selected for the t upper , t lower and t crit temperate bound- aries using bits 10 and 9 of config. the hysteresis applies for decreasing temperature only (hot to cold), or as temperature drifts below the specified limit. the t upper , t lower and t crit boundary conditions are described graphically in figure 4-2. 4.2.3 event output configuration the event output can be enabled using bit 3 of config (event output control bit) and can be configured as either a comparator output or as interrupt output mode using bit 0 of config (event mode). the polarity can also be specified as an active-high or active-low using bit 1 of config (event polarity). when the ambient temperature increases above the critical temperature limit, the event output is forced to a comparator output (regardless of bit 0 of config). when the temperature drifts below the critical temper- ature limit, the event output automatically returns to the state specified by bit 0 of config. the status of the event output can be read using bit 4 of config (event status). bit 7 and 6 of the config register can be used to lock the t upper , t lower and t crit registers. the bits prevent false triggers at the event output due to an accidental rewrite to these registers. the event output can also be used as a critical temper- ature output using bit 2 of config (critical output only). when this feature is selected, the event output becomes a comparator output. in this mode, the interrupt output configuration (bit 0 of config) is ignored. 4.2.3.1 comparator mode comparator mode is selected using bit 0 of config. in this mode, the event output is asserted as active-high or active-low using bit 1 of config. figure 4-2 shows the conditions that toggle the event output. if the device enters shutdown mode with asserted event output, the output remains asserted during shutdown. the device must be operating in continu- ous conversion mode for t conv ; the t a vs. t upper , t lower and t crit boundary conditions need to be satisfied in order for the event output to deassert. comparator mode is useful for thermostat-type applica- tions, such as turning on a cooling fan or triggering a system shutdown when the temperature exceeds a safe operating range. 4.2.3.2 interrupt mode interrupt mode is selected using bit 0 of config. in this mode, the event output is asserted as active-high or active-low using bit 1 of config. the output is deasserted by setting ? 1 ? to bit 5 of config (interrupt clear). shutting down the device will not reset or deas- sert the event output. however, clearing the interrupt using bit 5 of config while in shutdown mode will deassert the event output. this mode is ignored when the event output is used as critical temperature output only (bit 2 of config). interrupt mode applies to interrupt-driven, microcon- troller-based systems. the microcontroller receiving the interrupt will have to acknowledge the interrupt by setting ? 1 ? to bit 5 of config.
mcp9805 ds21977a-page 18 ? 2005 microchip technology inc. figure 4-2: event output boundary conditions. t upper t lower event output t crit t a t upper - t hyst (active-low) comparator interrupt s/w int. clear critical t crit - t hyst 1 2 3 4 5 6 note event output boundary conditions event output t a bits comparator interrupt critical 15 14 13 1 t a t lower hlh000 2 t a < t lower - t hyst llh001 3 t a > t upper llh010 4 t a t upper - t hyst hlh000 5 t a t crit lll100 6 t a < t crit - t hyst lhh010 * when t a t crit and t a < t crit - t hyst , the event output is in comparator mode and bit 0 of config (interrupt mode) is ignored. t lower -t hyst t lower -t hyst t upper - t hyst 1 3 4 2 note: *
? 2005 microchip technology inc. ds21977a-page 19 mcp9805 4.3 summary of power-up default the mcp9805 has an internal power-on reset (por) circuit. if the power supply voltage v dd drifts below the v por threshold, the device resets the registers to the power-up default settings. table 4-6 shows the power-up default summary. table 4-6: power-up defaults registers default register data (hex) power-up default register description address (hex) register label 0x00 capability 0x000f 0.25 c/lsb measures temperature below 0c 1c accuracy over active range basic capability (event output) 0x01 config 0x0000 comparator mode active-low output event and critical output output enabled event not asserted interrupt cleared event limits unlocked critical limit unlocked continuous conversion 0c hysteresis 0x02 t upper 0x0000 0c 0x03 t lower 0x0000 0c 0x04 t crit 0x0000 0c 0x05 t a 0x0000 0c 0x06 manufacturer id 0x0054 0x0054 (hex) 0x07 device id/device revision 0x0000 0x0000 (hex)
mcp9805 ds21977a-page 20 ? 2005 microchip technology inc. 5.0 serial communication 5.1 2-wire i 2 c?/smbus compatible interface the mcp9805 serial clock input (sclk) and the bidirectional serial data line (sda) form a 2-wire bidirectional smbus/standard i 2 c compatible communication port (refer to the digital input/output pin characteristics table and serial interface timing characteristics table). the following bus protocol has been defined: table 5-1: mcp9805 serial bus protocol descriptions 5.1.1 data transfer data transfers are initiated by a start condition (start), followed by a 7-bit device address and a read/write bit. an acknowledge (ack) from the slave confirms the reception of each byte. each access must be terminated by a stop condition (stop). repeated communication is initiated after t b-free . this device does not support sequential register read/write. each register needs to be addressed using the register pointer. this device supports the receive protocol. the register can be specified using the pointer for the initial read (see figure 5-4). each repeated read or receive can then be followed with a start condition, followed by an address byte. the mcp9805 retains the previously selected register. therefore, it expects a read from the previously-specified register (repeated pointer specification is not necessary). 5.1.2 master/slave the bus is controlled by a master device (typically a microcontroller) that controls the bus access and gener- ates the start and stop conditions. the mcp9805 is a slave device and does not control other devices in the bus. both master and slave devices can operate as either transmitter or receiver. however, the master device determines which mode is activated. 5.1.3 start/stop condition a high-to-low transition of the sda line (while sclk is high) is the start condition. all data transfers must be preceded by a start condition from the master. if a start condition is generated during data transfer, the mcp9805 resets and accepts the new start condition. a low-to-high transition of the sda line (while sclk is high) signifies a stop condition. if a stop condition is introduced during data transmission, the mcp9805 releases the bus. all data transfers are ended by a stop condition from the master. however, for continuous data reception from the previously-specified pointer (register 4-1), a start condition can be introduced at the end of data reception. the mcp9805 retains the previ- ously-set pointer. therefore, there is no need to repeat the pointer specification (see register 5-4). 5.1.4 address byte following the start condition, the host must transmit an 8-bit address byte to the mcp9805. the address for the mcp9805 is ? 0011,a2,a1,a0 ? in binary, where the a2, a1 and a0 bits are set externally by connecting the corresponding pins to v dd ? 1 ? or gnd ? 0 ?. the 7-bit address transmitted in the serial bit stream must match the selected address for the mcp9805 to respond with an ack. bit 8 in the address byte is a read/write bit. setting this bit to ? 1 ? commands a read operation, while ? 0 ? commands a write operation (see figure 5-1). term description master the device that controls the serial bus, typically a microcontroller. slave the device addressed by the master, such as the mcp9805. transmitter device sending data to the bus. receiver device receiving data from the bus. start a unique signal from master to initiate serial interface with a slave. stop a unique signal from the master to terminate serial interface from a slave. read/write a read or write to the mcp9805 registers. ack a receiver acknowledges (ack) the reception of each byte by polling the bus. nak a receiver not-acknowledges (nak) or releases the bus to show end-of-data (eod). busy communication is not possible because the bus is in use. not busy the bus is in the idle state, both sda and sclk remain high. data valid sda must remain stable before sclk becomes high in order for a data bit to be considered valid. during normal data transfers, sda only changes state while sclk is low.
? 2005 microchip technology inc. ds21977a-page 21 mcp9805 figure 5-1: device addressing. 5.1.5 data valid after the start condition, each bit of data in transmis- sion needs to be settled for a time specified by t su-data before sclk toggles from low-to-high (see serial interface timing characteristics ). 5.1.6 acknowledge (ack) each receiving device, when addressed, is obliged to generate an ack bit after the reception of each byte. the master device must generate an extra clock pulse for ack to be recognized. the acknowledging device pulls down the sda line for t su-data before the low-to-high transition of sclk from the master. sda also needs to remain pulled down for t h-data after a high-to-low transition of sclk. during read, the master must signal an end-of-data (eod) to the slave by not generating an ack bit (nak) once the last bit has been clocked out of the slave. in this case, the slave will leave the data line released to enable the master to generate the stop condition. 5.1.7 time out if the sclk stays high or low for a time specified by t out , the mcp9805 releases the bus and resets the serial interface. the master will have to restart the communication cycle with a start condition. this dictates the minimum clock speed. 123456789 sclk sda 0 0 1 1 a2 a1 a0 start address byte slave address r/w mcp9805 response code address a c k
mcp9805 ds21977a-page 22 ? 2005 microchip technology inc. 5.2 timing diagram figure 5-2: read 1-byte and 2-byte data from a register. s = start condition p = stop condition sda a c k 0011 a pointer 0000 p a c k s 2 a 1 a 0 1 p 0 12345678 12345678 sclk 0 address byte a c k 0011 a n a k s p 2 a 1 a 0 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 12345678 address byte data r mcp9805 mcp9805 mcp9805 master w sda a c k 0011 a pointer 0000 p a c k s 2 a 1 a 0 1 p 0 12345678 12345678 sclk 0 address byte a c k 0011 a msb data a c k n a k s p 2 a 1 a 0 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 12345678 12345678 address byte lsb data r d 15 d 14 d 13 d 12 d 11 d 10 d 9 d 8 mcp9805 mcp9805 mcp9805 master master w sda sclk sda sclk read 1-byte data read 2-byte data p 2 p 2
? 2005 microchip technology inc. ds21977a-page 23 mcp9805 figure 5-3: write 1-byte and 2-byte data from a register. sda a c k 0011 a 0000 a c k s 2 a 1 a 0 12345678 12345678 sclk 0 address byte w mcp9805 mcp9805 p 1 p 0 msb data a c k a c k p d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 12345678 lsb data d 15 d 14 d 13 d 12 d 11 d 10 d 9 d 8 pointer s = start condition p = stop condition mcp9805 sda a c k 0011 a 0000 a c k s 2 a 1 a 0 12345678 12345678 sclk 0 address byte w mcp9805 mcp9805 p 1 p 0 a c k p d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 data pointer write 1-byte data write 2-byte data mcp9805 mcp9805 p 2 p 2
mcp9805 ds21977a-page 24 ? 2005 microchip technology inc. figure 5-4: receive 1-byte data from previously set pointer. s = start condition p = stop condition sda a c k 0011 a pointer 0000 p a c k s 2 a 1 a 0 1 p 0 12345678 12345678 sclk 0 address byte a c k 0011 a n a k s 2 a 1 a 0 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 12345678 address byte data r mcp9805 mcp9805 mcp9805 master w a c k 0011 a n a k s 2 a 1 a 0 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 12345678 12345678 address byte data r mcp9805 master note: user can continue to receive 1-byte or 2-byte data (depending on the specific register) indefinitely from a previously-set register pointer. this device does not support sequential read/write. sda sclk sda sclk register pointer setting for continuous reception (note) receive 1-byte data receive another 1-byte data p 2
? 2005 microchip technology inc. ds21977a-page 25 mcp9805 6.0 applications information 6.1 connecting to the serial bus the sda and sclk serial interface pins are open-drain pins that require pull-up resistors. this configuration is shown in figure 6-1. figure 6-1: pull-up resistors on serial interface. the number of devices connected to the bus is limited only by the maximum rise and fall times of the sda and sclk lines. unlike i 2 c specifications, smbus does not specify a maximum bus capacitance value. rather, the smbus specification requires that the maximum current through the pull-up resistor be 350 a and minimum 100 a. because of this, the value of the pull-up resistors will vary depending on the system?s bias voltage (v dd ). the pull-up resistor values for a 3.3 v system ranges 9 k to 33 k . minimizing bus capacitance is still very important as it directly affects the rise and fall times of the sda and sclk lines. although smbus specifications only require the sda and sclk lines to pull-down 350 a, with a maximum voltage drop of 0.4 v, the mcp9805 is designed to meet a maximum voltage drop of 0.4 v, with 3 ma of current. this allows lower pull-up resistor values to be used, allowing the mcp9805 to handle higher bus capacitance. in such applications, all devices on the bus must meet the same pull-down current requirements. a possible configuration using multiple devices on the smbus is shown in figure 6-2. figure 6-2: multiple devices on dimm smbus. 6.2 layout considerations the mcp9805 does not require any additional compo- nents besides the master controller in order to measure temperature. however, it is recommended that a decoupling capacitor of 0.1 f to 1 f be used between the v dd and gnd pins. a high-frequency ceramic capacitor is recommended. it is necessary for the capacitor to be located as close as possible to the power and ground pins of the device in order to provide effective noise protection. 6.3 thermal considerations a potential for self-heating errors can exist if the mcp9805 sda, sclk and event lines are heavily loaded with pull-ups (high current). typically, the self-heating error is negligible because of the relatively small current consumption of the mcp9805. a temperature accuracy error of approximately 0.5c could result from self-heating if the communication pins sink/source the maximum current specified. for example, if the event output is loaded to maximum i ol , equation 6-1 can be used to determine the effect of self-heating. equation 6-1: effect of self-heating at room temperature (t a = +25c) with maximum i dd = 500 a and v dd = 3.6v, the self-heating due to power dissipation t is 0.2c for the dfn-8 package and 0.5c for the tssop-8 package. sda sclk v dd r r microcontroller mcp9805 event r master slave sda sclk mcp9805 temperature sensor 24lcs52 eeprom t ja v dd i dd v ol_event i ol_event v ol_sda i ol_sda ? + ? + ? () = where: t =t j - t a t j = junction temperature t a = ambient temperature ja = package thermal resistance v ol_event, sda = event and sda output v ol (0.4 v max ) i ol_event, sda = event and sda output i ol (3 ma max )
mcp9805 ds21977a-page 26 ? 2005 microchip technology inc. 7.0 packaging information 7.1 package marking information 8-lead dfn (mc) example : xxx yww nn aba 536 56 8-lead tssop (st) example: xxxx yyww nnn 805b 0536 256 legend: xx...x customer-specific information y year code (last digit of calendar year) yy year code (last 2 digits of calendar year) ww week code (week of january 1 is week ?01?) nnn alphanumeric traceability code pb-free jedec designator for matte tin (sn) * this package is pb-free. the pb-free jedec designator ( ) can be found on the outer packaging for this package. note : in the event the full microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. 3 e 3 e
? 2005 microchip technology inc. ds21977a-page 27 mcp9805 8-lead plastic dual flat no-lead package (mc) 2x3x0.9 mm body (dfn) ? saw singulated l e2 a3 a1 a top view d e exposed pad metal d2 bottom view 2 1 bp n (note 3) exposed tie bar pin 1 (note 1) id index area (note 2) configuration contact alternate detail 3. package may have one or more exposed tie bars at ends. bsc: basic dimension. theoretically exact value shown without tolerances. ref: reference dimension, usually without tolerance, for information purposes only. jedec equivalent: not registered see asme y14.5m see asme y14.5m millimeters * 0.50 bsc 2.00 bsc 0.20 ref. 3.00 bsc 1. pin 1 visual index feature may vary, but must be located within the hatched area. .039 .035 .031 0.80 a overall height 2. exposed pad may vary according to die attach paddle size. * controlling parameter contact length notes: contact width standoff overall width overall length contact thickness exposed pad width exposed pad length .016 .010 .012 .008 l b .020 .012 0.30 0.20 .001 .008 ref. .079 bsc .055 .063 .118 bsc d .051 .061 d2 e2 e .000 a3 a1 .059 .065 1.30 1.55 .002 0.00 dimension limits pitch number of pins inches .020 bsc min n e nom units 8 max min 1.00 0.90 0.40 0.25 0.50 0.30 1.40 1.60 1.50 1.65 0.02 0.05 8 nom max revised 08-10-05 drawing no. c04-123
mcp9805 ds21977a-page 28 ? 2005 microchip technology inc. 8-lead plastic thin shrink small outline (st) ? 4.4 mm body (tssop) a2 a a1 l c 1 2 d n p b e e1 10 5 0 10 5 0 mold draft angle bottom 10 5 0 10 5 0 mold draft angle top 0.30 0.25 0.19 .012 .010 .007 b lead width 0.20 0.15 0.09 .008 .006 .004 c lead thickness 0.70 0.60 0.50 .028 .024 .020 l foot length 3.10 3.00 2.90 .122 .118 .114 d molded package length 4.50 4.40 4.30 .177 .173 .169 e1 molded package width 6.50 6.38 6.25 .256 .251 .246 e overall width 0.15 0.10 0.05 .006 .004 .002 a1 standoff 0.95 0.90 0.85 .037 .035 .033 a2 molded package thickness 1.10 1.05 1.00 .043 .041 .039 a overall height 0.65 .026 p pitch 8 8 n number of pins max nom min max nom min dimension limits millimeters * inches units foot angle 0 4 8 0 4 8 dimensions d and e1 do not include mold flash or protrusions. mo ld flash or protrusions shall not exceed .005" (0.127mm) per s ide. notes: jedec equivalent: mo-153 revised 07-21-05 * controlling parameter drawing no. c04-086
? 2005 microchip technology inc. ds21977a-page 29 mcp9805 appendix a: revision history revision a (september 2005) ? original release of this document.
mcp9805 ds21977a-page 30 ? 2005 microchip technology inc. notes:
? 2005 microchip technology inc. ds21977a-page 31 mcp9805 product identification system to order or obtain information, e. g., on pricing or delivery, refer to the factory or the listed sales office . device: mcp9805: digital temperature sensor mcp9805t: digital temperature sensor (tape and reel) grade: b = 1c (max.) from +75c to +95c, b 2c (max.) from +40c to +125c, and b 3c (max.) from -20c to +125c temperature range: e = -40c to +125c package: mc = dual flat no lead (2x3 mm body), 8-lead st = plastic thin shrink small outline (4x4 mm body), 8-lead part no. x /xx package temperature range device examples: a) mcp9805t-be/mc: tape and reel, extended temp., 8ld dfn pkg. b) mcp9805-be/st: extended temp., 8ld tssop pkg. c) mcp9805t-be/st: tape and reel, extended temp., 8ld tssop pkg. ?x grade
mcp9805 ds21977a-page 32 ? 2005 microchip technology inc. notes:
? 2005 microchip technology inc. ds21977a-page 33 information contained in this publication regarding device applications and the like is prov ided only for your convenience and may be superseded by updates. it is your responsibility to ensure that your application m eets with your specifications. microchip makes no representations or war- ranties of any kind whether express or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fitness for purpose . microchip disclaims all liability arising from this information and its use. use of microchip?s products as critical components in life support systems is not authorized except with express written approval by microchip. no licenses are conveyed, implicitly or otherwise, under any microchip intellectual property rights. trademarks the microchip name and logo, the microchip logo, accuron, dspic, k ee l oq , micro id , mplab, pic, picmicro, picstart, pro mate, powersmart, rfpic, and smartshunt are registered trademarks of microchip technology incorporated in the u.s.a. and other countries. amplab, filterlab, migratable memory, mxdev, mxlab, picmaster, seeval, smartsensor and the embedded control solutions company are registered trademarks of microchip technology incorporated in the u.s.a. analog-for-the-digital age, app lication maestro, dspicdem, dspicdem.net, dspicworks, ecan, economonitor, fansense, flexrom, fuzzylab, in-circuit serial programming, icsp, icepic, linear active thermistor, mpasm, mplib, mplink, mpsim, pickit, picdem, picdem.net, piclab, pictail, powercal, powerinfo, powermate, powertool, rflab, rfpicdem, select mode, smart serial, smarttel, total endurance and wiperlock are trademarks of microchip tec hnology incorporated in the u.s.a. and other countries. sqtp is a service mark of mi crochip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2005, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. note the following details of the code protection feature on microchip devices: ? microchip products meet the specification cont ained in their particular microchip data sheet. ? microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal methods used to breach the code protection feature. all of these methods, to our knowledge, require using the microchip produc ts in a manner outside the operating specif ications contained in microchip?s data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are co mmitted to continuously improvin g the code protection features of our products. attempts to break microchip?s code protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2002 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona and mountain view, california in october 2003. the company?s quality system processes and procedures are for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms, microperipherals, nonvolatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified.
ds21977a-page 34 ? 2005 microchip technology inc. americas corporate office 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7200 fax: 480-792-7277 technical support: http://support.microchip.com web address: www.microchip.com atlanta alpharetta, ga tel: 770-640-0034 fax: 770-640-0307 boston westborough, ma tel: 774-760-0087 fax: 774-760-0088 chicago itasca, il tel: 630-285-0071 fax: 630-285-0075 dallas addison, tx tel: 972-818-7423 fax: 972-818-2924 detroit farmington hills, mi tel: 248-538-2250 fax: 248-538-2260 kokomo kokomo, in tel: 765-864-8360 fax: 765-864-8387 los angeles mission viejo, ca tel: 949-462-9523 fax: 949-462-9608 san jose mountain view, ca tel: 650-215-1444 fax: 650-961-0286 toronto mississauga, ontario, canada tel: 905-673-0699 fax: 905-673-6509 asia/pacific australia - sydney tel: 61-2-9868-6733 fax: 61-2-9868-6755 china - beijing tel: 86-10-8528-2100 fax: 86-10-8528-2104 china - chengdu tel: 86-28-8676-6200 fax: 86-28-8676-6599 china - fuzhou tel: 86-591-8750-3506 fax: 86-591-8750-3521 china - hong kong sar tel: 852-2401-1200 fax: 852-2401-3431 china - qingdao tel: 86-532-8502-7355 fax: 86-532-8502-7205 china - shanghai tel: 86-21-5407-5533 fax: 86-21-5407-5066 china - shenyang tel: 86-24-2334-2829 fax: 86-24-2334-2393 china - shenzhen tel: 86-755-8203-2660 fax: 86-755-8203-1760 china - shunde tel: 86-757-2839-5507 fax: 86-757-2839-5571 china - wuhan tel: 86-27-5980-5300 fax: 86-27-5980-5118 china - xian tel: 86-29-8833-7250 fax: 86-29-8833-7256 asia/pacific india - bangalore tel: 91-80-2229-0061 fax: 91-80-2229-0062 india - new delhi tel: 91-11-5160-8631 fax: 91-11-5160-8632 india - pune tel: 91-20-2566-1512 fax: 91-20-2566-1513 japan - yokohama tel: 81-45-471- 6166 fax: 81-45-471-6122 korea - gumi tel: 82-54-473-4301 fax: 82-54-473-4302 korea - seoul tel: 82-2-554-7200 fax: 82-2-558-5932 or 82-2-558-5934 malaysia - penang tel: 604-646-8870 fax: 604-646-5086 philippines - manila tel: 632-634-9065 fax: 632-634-9069 singapore tel: 65-6334-8870 fax: 65-6334-8850 taiwan - hsin chu tel: 886-3-572-9526 fax: 886-3-572-6459 taiwan - kaohsiung tel: 886-7-536-4818 fax: 886-7-536-4803 taiwan - taipei tel: 886-2-2500-6610 fax: 886-2-2508-0102 thailand - bangkok tel: 66-2-694-1351 fax: 66-2-694-1350 europe austria - weis tel: 43-7242-2244-399 fax: 43-7242-2244-393 denmark - copenhagen tel: 45-4450-2828 fax: 45-4485-2829 france - paris tel: 33-1-69-53-63-20 fax: 33-1-69-30-90-79 germany - munich tel: 49-89-627-144-0 fax: 49-89-627-144-44 italy - milan tel: 39-0331-742611 fax: 39-0331-466781 netherlands - drunen tel: 31-416-690399 fax: 31-416-690340 spain - madrid tel: 34-91-352-30-52 fax: 34-91-352-11-47 uk - wokingham tel: 44-118-921-5869 fax: 44-118-921-5820 **ds21977a** w orldwide s ales and s ervice 08/24/05

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