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1/10 www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. universal standard specification series serial eeprom series advantage series serial eeproms microwire bus br93c -10 u-1.8 family description the br93c46/56/66 series ics are serial eeproms of 1k/2k/4kbits, respectively, which feature low voltage operation and low power consumption, enabling compatibility with a wide ra nge of applications. in addition, compact packages are available, contributing to en d-product miniaturization. features 1) microwire bus interface 2) single supply voltage: 1.8 to 5.5v 3) 16bit serial eeprom 4) automatic erase before write and self-timed programming cycle 5) ready /busy status 6) 2mhz clock frequency, 10ms write time 7) auto-increment of register address for read mode 8) 1,000,000 write/erase cycles 9) 40-year data retention pin configuration table1.pin configuration pin name function cs chip select sk serial data clock di serial data input do serial data output gnd ground vcc power supply dc don?t connect figure1.package these eeproms utilize a three line serial interface consisting of serial data input (di), serial clock (sk), and serial data output (do) after one read instruction segmen t is received, if the chip select (cs) remains high, the address pointer automatically cycles to the next higher register address, giving a continuous string of output data, depen ding on the device and the starting address. when a write or wral instruction is received, the previous data in the address locations are automatically overwritten, elim inating the need for an erase command. when chip select (cs) is set to h after the write command, the status signal (ready/busy) becomes active at the serial data output (do) until the star t bit of the next command. the status signal is active when chip select (cs) is high, and serial data output (do) pin outputs high ? z when chip select (cs) is low. no.10001eat11 cs sk di do vcc dc dc gnd 1 2 3 4 8 7 6 5 8-lead soic dc vcc cs sk dc gnd do di 1 2 3 4 8 7 6 5 8-lead soic rotated (1k jedec only)
technical note 2/10 br93c
technical note 3/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. electrical characteristics table 4: dc characteristics (unle ss otherwise specified, ta=-40-85 , v cc =1.8-5.5v) parameter symbol specification unit test condition min. typ. max supply voltage v cc 1.8 - 5.5 v supply current i cc - - 2.0 ma v cc =5v, read at f=1mhz - - 2.0 ma v cc =5v, write at f=1mhz standby current i sb - - 10 a vcc=2.7v,cs=0v - - 30 a vcc=5.0v,cs=0v input leakage i il - - 1.0 a 0v Qv ih Q vcc output leakage i ol - - 1.0 a 0 Qv out Qv cc ,do in hi-z input low voltage input high voltage v il1 v ih1 -0.3 2.0 - - 0.8 vcc+0.3 v v 4.0v Qv cc Q 5.5v input low voltage input high voltage v il2 v ih2 -0.3 0.7v cc - - 0.2v cc vcc+0.3 v v v cc Q 4.0 v output low voltage output high voltage v ol1 v oh1 - - 0.4 v 2.7v Qv cc Q 5.5v i ol =2.1ma, i oh =-0.4ma 2.4 - - v output low voltage output high voltage v ol2 v oh2 - v cc -0.2 - - 0.2 - v v 1.8v Qv cc Q 2.7v i ol =0.15ma, i oh =-100a
technical note 4/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. table 5: ac characteristics (unl ess otherwise specified, ta=-40-85 , v cc =1.8-5.5v) parameter symbol specification unit test condition min. typ. max sk clock frequency f sk 0 0 0 - - - 2 1 0.25 mhz 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v sk high time t skh *1 250 250 1000 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v sk low time t skl *1 250 250 1000 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v minimum cs low time t cs 250 250 1000 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v cs set-up time(relative to sk) t css 50 50 200 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v di set-up time(relative to sk) t dis 100 100 400 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v cs hold time(rela tive to sk) t csh 0 - - ns di hold time(relative to sk) t dih 100 100 400 - - - - - - ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v output delay to ?1? t pd1 - - 250 250 1000 ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v output delay to ?0? t pd0 - - 250 250 1000 ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v cs to status vaid t sv - - 250 250 1000 ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v cs to do in high impedance t df - - 100 100 400 ns 4.5v QvccQ 5.5v 2.7v QvccQ 5.5v 1.8v QvccQ 5.5v write cycle time t wp - - 10 ms endurance(5.0v,25 ) - 1m - - write cycle *1: t skl + t skh R 1/fc
technical note 5/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. operating instructions the br93 has a seven instruction set, shown in tables 6 and 7. the timing charts depicted in figures 3 to 10. input data are clocked in from serial data input (di) at the rising edge of the serial clock (sk), while output data from the serial data output (do) t oggles at the rising edge of the serial clock (sk) during read mode. the eeprom recognizes the first 1 data received, after chip select (cs) goes high, as the start bit. the input of many 0?s before 1 will not make a difference ? 1 will still be recognized as the start bit. table 6: instruction set (br93c46) instruction start bit op code address*1 data read 1 10 a5 a4 a3 a2 a1 a0 ewen 1 00 1 1 * * * * erase 1 11 a5 a4 a3 a2 a1 a0 write 1 01 a5 a4 a3 a2 a1 a0 d15 d0 eral 1 00 1 0 * * * * wral 1 00 0 1 * * * * d15d0 ewds 1 00 0 0 * * * * *1: * = inconsequential bit table 7: instruction set (br93c56 and br93c66) instruction start bit op code address *1, *2 data read 1 10 a7 a6 a5 a4 a3 a2 a1 a0 ewen 1 00 1 1 ***** * erase 1 11 a7 a6 a5 a4 a3 a2 a1 a0 write 1 01 a7 a6 a5 a4 a3 a2 a1 a0 d15d0 eral 1 00 1 0 ***** * wral 1 00 0 1 ***** * d15d0 ewds 1 00 0 0 ***** * *1: = inconsequential bit *2: address bit a7 is not decoded by the br93c56.
technical note 6/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. function description read the addressed 16 bits of data are clocked out after the read instruction is receiv ed. during clocking of the 11th(1) bit the clock is high and the eeprom outputs ?0? (dummy 0) as a sign to begin data output. this device has an auto-increm ent feature t hat provides the whole memory array data using just one read command. it is recommended that chip select (cs) is high and the serial clock (sk) keep clocking, since the eeprom will output the next address data following the addressed 16 bits of data. ewen the unit is in disable mode after power on. the ewen instruction must precede any write commands. after ewen is executed the eeprom will be in enable mode until power o ff or ewds instruction is received. neither the ewen nor the ewds instruction has any effect on the read instruct ion. the state ( h or l) of the serial data input (di) afte r the 6th clock of the serial clock (sk) doesn?t matter, either. therefore, it is recommended that eight more serial clock (sk) signals be inputted. ewds this command puts the eeprom into disable mode ? similar to the status after power on. the read command can be preceded even in disable mode. it is recommended that the ewds command be executed after any write commands in order to prevent inadvertent writing. the state (h or l) of serial data input (di) after the 6th clock of the serial clock (sk) does not matter. therefore, the inputting of eight more serial clock (sk) signals is recommended as well. erase the erase command writes ?1? to all bits in the specified address. between the rising edge of the 11th and 12th(2) clock cycles the falling edge of chip select (cs) initiates a high voltage cycle that writes the data into the non-volatile memory array. the serial data output (do) pin indicates the ready/busy status. write the write command writes 16 bits of data into the specified address. between the rising edge of the 27th and 28th(3) clock cycles the falling edge of chip select (cs) initiates a high voltage cycle that writes the data into the non-volatile memory array. the serial data output (do) pin indicates the ready/busy status. during this high voltage cycle (busy state), the eeprom does not receive any commands. the unit will not write the data into non-volatile memory array if chip select (cs) is l after input of the 28th(4) or more cycle of the serial clock (sk) eral the eral command writes ?1? in all bits at the specified address. between the rising edge of 11th and 12th (5) clock cycles the falling edge of serial clock (sk) initiates a high voltage cycle that writes the data into the non-volatile memory array. serial data output (do) gives an indication of the ready/busy status. the time from the rising edge of the 11th (6) clock to the falling edge of s should be more than t skh . wral this command writes 16 bits of data to the specified address. it takes maximum 5ms, since all of the data are written into the me mory array at the same time. between the rising edge of the 27th and 28th (7) clock cycles the falling edge of chip select (cs) initiates a high voltage cycle that writes the data in to the non-volatile memory array. the eeprom will not write the data into the non-volatile memory array if chip select (cs) is l after input of the 28th (8) or more cycle of the serial clock (sk). (1),(6) br93c46 : 9th br93c56/66 : 11th (2),(5) br93c46 : 9th and 10th br93c56/66 : 11th and 12th (3),(7) br93c46 : 25th and 26th br93c56/66 : 27th and 28th (4),(8) br93c46 : 26th br93c56/66 : 28th
technical note 7/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. timing diagrams figure 3: synchronous data timing figure 4: read sequence figure 5: ewen sequence figure 6: ewds sequence cs sk t df t skh t skl status valid di do (read) do (write) t dih t dis t pd0 t pd1 t css t sv t csh br93c46: n=25,m =5 br93c56/66: n=27,m=7 br93c46: n=9 br93c56/66: n=11 br93c46: n=9 br93c56/66: n=11 *1 high-z *1: output the data of next address (auto increment) 0 a0 n+1 d0 9n d15 10 d14 d15 d14 d1 a1 0 12 4 11 am am-1 cs sk di do high-z 1 10 1 0 cs sk di 12345 do n 678
technical note 8/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. figure 7: write sequence figure 8: wral sequence figure 9: erase sequence figure 10: eral sequence. br93c46: n=25,m =5 br93c56/66: n=27,m=7 br93c46: n=9, m=5 br93c56/66: n=11, m=7 *inconsequential data br93c46: n=25 br93c56/66: n=27 br93c46: n=9 br93c56/66: n=11 high-z t slsh ready busy cs sk di do 12 4 a1 a0 0 status n d0 d1 d15 d14 1 am am-1 1 t sv t cs t wp high-z 10001 status n d0 d1 d15 d14 12 5 cs sk di ready busy t wp do t sv t cs high-z t cs t wp 111am n a0a1 read status busy 12 4 a3 a2 cs sk di do t sv t slsh high-z 0010 24 cs sk 1 di n 1 do tw status busy ready t shqv
technical note 9/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. ordering information table 8: br93c46 ordering information ordering code package operating range br93c46r-10su-1.8 br93c46-10su-1.8 jedec soic jedec soic -40 to 85 table 9: br93c56 ordering information ordering code package operating range br93c56-10su-1.8 br93c56-10tu-1.8 jedec soic -40 to 85 table 10: br93c66 ordering information ordering code package operating range br93c66-10su-1.8 br93c66-10tu-1.8 jedec soic -40 to 85 package outline table 11 jedec soic, package size data symbol mm inches typ. min. max. typ. min. max. a 1.375 1.275 1.475 0.054 0.050 0.058 a1 0.175 - - 0.007 - - b 0.42 0.32 0.52 0.017 0.013 0.02 c 0.20 0.10 0.30 0.008 0.004 0.012 d 4.90 4.70 5.10 0.193 0.185 0.201 e 1.27 0.05 e 6.00 5.70 6.30 0.236 0.224 0.248 e1 3.90 3.70 4.10 0.154 0.146 0.161 l 0.45 0.018 4 0 10 4 0 10 figure 11. jedec soic package outline 1. this drawing is subject to change without notice. 2. body dimensions do not include mo ld flash or protrusion, or gate burns. 3. reference jedec ms-012 variation aa. notes
technical note 10/10 br93c -10 u-1.8 family www.rohm.com 2010.07 - rev. a ? 2010 rohm co., ltd. all rights reserved. ordering part number b r 9 3 c 4 6 a n - 1 0 s u - 1.8 rohm prefix bus type 93c: microwire 24c: i 2 c 25: spi rev pakage type -10s:jedecsoic (microwire,br24c01) n-10s: jedecsoic (i2c[except br24c01],spi) operating temperature u: -40c~+85c pb-free supplyvoltage 1.8:1.8v ~ 5.5v 2.7:2.7v ~ 5.5v density microwire 46=1k 56=2k 66=4k 76=8k 86=16k i 2 c 01=1k 02=2k 04=4k 08=8k 16=16k 32=32k 64=64k spi 010=1k 020=2k 040=4k 080=8k 160=16k 320=32k 640=64k tape and real information ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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