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| M27W102 1 Mbit (64Kb x16) Low Voltage OTP EPROM s LOW VOLTAGE READ OPERATION: 2.7V to 3.6V FAST READ ACCESS TIME: - 70ns at VCC = 3.0V to 3.6V - 80ns at VCC = 2.7V to 3.6V s s s PIN COMPATIBLE with M27C1024 LOW POWER CONSUMPTION: - 15A max Standby Current - 15mA max Active Current at 5MHz PLCC44 (K) TSOP40 (N) 10 x 14 mm s s PROGRAMMING TIME 100s/byte (typical) HIGH RELIABILITY CMOS TECHNOLOGY - 2,000V ESD Protection - 200mA Latchup Protection Immunity s ELECTRONIC SIGNATURE - Manufacturer Code: 20h - Device Code: 8Ch Figure 1. Logic Diagram DESCRIPTION The M27W102 is a low voltage 1 Mbit EPROM offered in the OTP range (one time programmable). It is ideally suited for microprocessor systems requiring large data or program storage and is organized as 65,536 words by 16 bits. A0-A15 VCC VPP 16 16 Q0-Q15 Table 1. Signal Names A0-A15 Q0-Q15 E G P VPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable P E G M27W102 VSS Program Program Supply Supply Voltage Ground AI01922 May 1998 1/12 M27W102 Figure 2A. LCC Pin Connections Figure 2B. TSOP Pin Connections 1 44 Q12 Q11 Q10 Q9 Q8 VSS NC Q7 Q6 Q5 Q4 A13 A12 A11 A10 A9 VSS NC A8 A7 A6 A5 12 M27W102 34 23 Q3 Q2 Q1 Q0 G NC A0 A1 A2 A3 A4 AI01924 A9 A10 A11 A12 A13 A14 A15 NC P VCC VPP E DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 1 40 10 11 M27W102 (Normal) 31 30 20 21 AI01925 VSS A8 A7 A6 A5 A4 A3 A2 A1 A0 G DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 VSS Warning: NC = Not Connected. Q13 Q14 Q15 E VPP NC VCC P NC A15 A14 Warning: NC = Not Connected. Table 2. Absolute Maximum Ratings (1) Symbol TA TBIAS TSTG VIO (2) VCC VA9 (2) VPP Parameter Ambient Operating Temperature (3) Temperature Under Bias Storage Temperature Input or Output Voltage (except A9) Supply Voltage A9 Voltage Program Supply Voltage Value -40 to 85 -50 to 125 -65 to 150 -2 to 7 -2 to 7 -2 to 13.5 -2 to 14 Unit C C C V V V V Note: 1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. 2. Minimum DC voltage on Input or Output is -0.5V with possible undershoot to -2.0V for a period less than 20ns. Maximum DC voltage on Output is VCC +0.5V with possible overshoot to VCC +2V for a period less than 20ns. 3. Depends on range. 2/12 M27W102 Table 3. Operating Modes Mode Read Output Disable Program Verify Program Inhibit Standby Electronic Signature E V IL V IL V IL V IL VIH VIH V IL G VIL V IH X VIL X X VIL P VIH X VIL Pulse VIH X X VIH A9 X X X X X X VID VPP VCC or VSS VCC or VSS VPP VPP VPP VCC or VSS VCC Q0-Q15 Data Out Hi-Z Data Input Data Output Hi-Z Hi-Z Codes Note: X = VIH or VIL, VID = 12V 0.5V. Table 4. Electronic Signature Identifier Manufacturer's Code Device Code A0 VIL VIH Q7 0 1 Q6 0 0 Q5 1 0 Q4 0 0 Q3 0 1 Q2 0 1 Q1 0 0 Q0 0 0 Hex Data 20h 8Ch Note: X = VIH or VIL, VID = 12V 0.5V The M27W102 operates in the read mode with a supply voltage as low as 2.7V at -40 to 85C temperature range. The decrease in operating power allows either a reduction of the size of the battery or an increase in the time between battery recharges. The M27W102 is offered in PLCC44 and TSOP40 (10 x 14mm) packages. DEVICE OPERATION The operating modes of the M27W102 are listed in the Operating Modes table. A single power supply is required in the read mode. All inputs are TTL levels except for VPP and 12V on A9 for Electronic Signature. Read Mode The M27W102 has two control functions, both of which must be logically active in order to obtain data at the outputs. Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data to the output pins, independent of device selection. Assuming that the addresses are stable, the address access time (t AVQV) is equal to the delay from E to output (t ELQV). Data is available at the output after a delay of tOE from the falling edge of G, assuming that E has been low and the addresses have been stable for at least t AVQV-tGLQV. Standby Mode The M27W102 has a standby mode which reduces the supply current from 15mA to 15A with low voltage operation VCC 3.6V, see Read Mode DC Characteristics table for details. The M27W102 is placed in the standby mode by applying a CMOS high signal to the E input. When in the standby mode, the outputs are in a high impedance state, independent of the G input. Two Line Output Control Because EPROMs are usually used in larger memory arrays, this product features a 2 line control function which accommodates the use of multiple memory connection. The two line control function allows: a. the lowest possible memory power dissipation, b. complete assurance that output bus contention will not occur. For the most efficient use of these two control lines, E should be decoded and used as the primary device selecting function, while G should be made a common connection to all devices in the array and connected to the READ line from the system control bus. This ensures that all deselected memory devices are in their low power standby mode and that the output pins are only active when data is required from a particular memory device. 3/12 M27W102 Table 5. AC Measurement Conditions High Speed Input Rise and Fall Times Input Pulse Voltages Input and Output Timing Ref. Voltages 10ns 0 to 3V 1.5V Standard 20ns 0.4V to 2.4V 0.8V and 2V Figure 3. AC Testing Input Output Waveform Figure 4. AC Testing Load Circuit 1.3V High Speed 3V 1.5V 0V DEVICE UNDER TEST 2.0V 0.8V AI01822 1N914 3.3k Standard 2.4V OUT CL 0.4V CL = 30pF for High Speed CL = 100pF for Standard CL includes JIG capacitance AI01823B Table 6. Capacitance (1) (TA = 25 C, f = 1 MHz) Symbol C IN COUT Parameter Input Capacitance Output Capacitance Test Condit ion VIN = 0V VOUT = 0V Min Max 6 12 Unit pF pF Note: Sampled only, not 100% tested. System Considerations The power switching characteristics of Advanced CMOS EPROMs require careful decoupling of the devices. The supply current, ICC, has three segments that are of interest to the system designer: the standby current level, the active current level, and transient current peaks that are produced by the falling and rising edges of E. The magnitude of transient current peaks is dependent on the capacitive and inductive loading of the device at the output. The associated transient voltage peaks can be suppressed by complying with the two line output control and by properly selected decoupling capacitors. It is recommended that a 0.1F ceramic capacitor be used on every device between VCC and VSS. This should be a high frequency capacitor of low inherent inductance and should be placed as close to the device as possible. In addition, a 4.7F bulk electrolytic capacitor should be used between VCC and VSS for every eight devices. The bulk capacitor should be located near the power supply connection point. The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces. 4/12 M27W102 Table 7. Read Mode DC Characteristics (1) (TA = -40 to 85C; VCC = 2.7V to 3.6V; VPP = VCC) Symbol ILI ILO ICC ICC1 ICC2 IPP VIL VIH (2) VOL VOH Parameter Input Leakage Current Output Leakage Current Supply Current Supply Current (Standby) TTL Supply Current (Standby) CMOS Program Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage TTL IOL = 2.1mA IOH = -400A 2.4 Test Condition 0V VIN V CC 0V VOUT VCC E = VIL, G = VIL, IOUT = 0mA, f = 5MHz, VCC 3.6V E = VIH E > VCC - 0.2V, VCC 3.6V VPP = VCC -0.6 0.7 VCC 1 15 100 0.2 VCC VCC + 0.5 0.4 mA A A V V V V Min Max 10 10 15 Unit A A mA Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after V PP. 2. Maximum DC voltage on Output is VCC +0.5V. Table 8. Read Mode AC Characteristics (1) (TA = -40 to 85C; VCC = 2.7V to 3.6V; VPP = VCC) M27W102 Test Condition Min tAVQV tELQV tGLQV tEHQZ (2) tGHQZ (2) tAXQX tACC tCE tOE tDF tDF tOH Address Valid to Output Valid Chip Enable Low to Output Valid Output Enable Low to Output Valid Chip Enable High to Output Hi-Z Output Enable High to Output Hi-Z Address Transition to Output Transition E = VIL, G = VIL G = VIL E = VIL G = VIL E = VIL E = VIL, G = VIL 0 0 0 -80 (3) -100 (-120/-150/-200) Symbol Alt Parameter Unit VCC = 3.0V to 3.6V VCC = 2.7V to 3.6V VCC = 2.7V to 3.6V Max 70 70 40 40 40 Min Max 80 80 50 Min Max 100 100 60 ns ns ns ns ns ns 0 0 0 50 50 0 0 0 60 60 Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after V PP. 2. Sampled only, not 100% tested. 3. Speed obtained with High Speed AC measurement conditions. 5/12 M27W102 Figure 5. Read Mode AC Waveforms A0-A15 VALID tAVQV tAXQX VALID E tGLQV G tELQV Q0-Q15 tGHQZ Hi-Z tEHQZ AI00705B Table 9. Programming Mode AC Characteristics (1) (TA = 25 C; VCC = 6.25V 0.25V; VPP = 12.75V 0.25V) Symbol ILI ICC IPP V IL VIH VOL VOH VID Parameter Input Leakage Current Supply Current Program Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage TTL A9 Voltage IOL = 2.1mA IOH = -400A 2.4 11.5 12.5 E = VIL -0.3 2 Test Condition 0V V IN VIH Min Max 10 50 50 0.8 VCC + 0.5 0.4 Unit A mA mA V V V V V Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after V PP. 6/12 M27W102 Table 10. Programming Mode AC Characteristics (1) (TA = 25 C; VCC = 6.25V 0.25V; VPP = 12.75V 0.25V) Symbol tAVPL tQVPL tVPHPL t VCHPL tELPL tPLPH tPHQX tQXGL tGLQV tGHQZ (2) tGHAX Alt tAS tDS tVPS tVCS tCES tPW tDH tOES tOE tDFP tAH Parameter Address Valid to Program Low Input Valid to Program Low VPP High to Program Low VCC High to Program Low Chip Enable Low to Program Low Program Pulse Width Program High to Input Transition Input Transition to Output Enable Low Output Enable Low to Output Valid Output Enable High to Output Hi-Z Output Enable High to Address Transition 0 0 Test Condition Min 2 2 2 2 2 95 2 2 100 130 105 Max Unit s s s s s s s s ns ns ns Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after V PP. 2. Sampled only, not 100% tested. Figure 6. Programming and Verify Modes AC Waveforms A0-A15 tAVPL Q0-Q15 tQVPL VPP tVPHPL VCC tVCHPL E tELPL P tPLPH G DATA IN VALID DATA OUT tPHQX tGLQV tGHQZ tGHAX tQXGL PROGRAM VERIFY AI00706 7/12 M27W102 Figure 7. Programming Flowchart ming with PRESTO II consists of applying a sequence of 100s program pulses to each word until a correct verify occurs (see Figure 7). During programming and verify operation, a MARGIN MODE circuit is automatically activated in order to guarantee that each cell is programmed with enough margin. No overprogram pulse is applied since the verify in MARGIN MODE at V CC much higher than 3.6V, provides necessary margin to each programmed cell. Program Inhibit Programming of multiple M27W102s in parallel with different data is also easily accomplished. Except for E, all like inputs including G of the parallel M27W102 may be common. A TTL low level pulse applied to a M27W102's P input, with E low and VPP at 12.75V, will program that M27W102. A high level E input inhibits the other M27W102s from being programmed. Program Verify A verify (read) should be performed on the programmed bits to determine that they were correctly programmed. The verify is accomplished with E and G at VIL, P at VIH, VPP at 12.75V and VCC at 6.25V. On-Board Programming The M27W102 can be directly programmed in the application circuit. See the relevant Application Note AN620. Electronic Signature The Electronic Signature (ES) mode allows the reading out of a binary code from an EPROM that will identify its manufacturer and type. This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. The ES mode is functional in the 25C 5C ambient temperature range that is required when programming the M27W102. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27W102 with VPP = VCC = 5V. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during Electronic Signature mode. Byte 0 (A0=V IL) represents the manufacturer code and byte 1 (A0=VIH) the device identifier code. For the STMicroelectronics M27W102, these two iden-tifier bytes are given in Table 4 and can be read-out on outputs Q0 to Q7. Note that the M27W102 and M27C1002 have the same identifier byte. VCC = 6.25V, VPP = 12.75V n =0 P = 100s Pulse NO ++n = 25 YES NO VERIFY YES Last Addr NO ++ Addr FAIL YES CHECK ALL WORDS 1st: VCC = 6V 2nd: VCC = 4.2V AI00707C Programming The M27W102 has been designed to be fully compatible with the M27C1024 and has the same electronic signature. As a result the M27W102 can be programmed as the M27C1024 on the same programming equipment applying 12.75V on VPP and 6.25V on VCC by the use of the same PRESTO II algorithm. When delivered, all bits of the M27W102 are in the '1' state. Data is introduced by selectively programming '0's into the desired bit locations. Although only '0's will be programmed, both '1's and '0's can be present in the data word. The M27W102 is in the programming mode when VPP input is at 12.75V, E is at VIL and P is pulsed to VIL. The data to be programmed is applied to 16 bits in parallel to the data output pins. The levels required for the address and data inputs are TTL. VCC is specified to be 6.25V 0.25V. PRESTO II Programming Algorithm PRESTO II Programming Algorithm allows programming of the whole array with a guaranteed margin, in a typical time of 6.5 seconds. Program- 8/12 M27W102 Table 11. Ordering Information Scheme Example: Device Type M27W102 -80 K 6 TR Speed -80 (1,2) = 80 ns -100 = 100 ns Not for New Design (3) -120 = 120 ns -150 = 150 ns -200 = 200 ns Package K = PLCC44 N = TSOP40: 10 x 14mm Temperature Range 6 = -40 to 85C Optio n TR = Tape & Reel Packing Note: 1. High Speed, see AC Characteristics section for further information. 2. This speed also guarantees 70ns access time at VCC = 3.0V to 3.6V. 3. These speeds are replaced by the 100ns. For a list of available options (Speed, Package, etc...) or for further information on any aspect of this device, please contact the ST Sales Office nearest to you. 9/12 M27W102 Table 12. PLCC44 - 44 lead Plastic Leaded Chip Carrier, square, Package Mechanical Data mm Symb Typ A A1 A2 B B1 D D1 D2 E E1 E2 e F R N CP 0.89 1.27 Min 4.20 2.29 - 0.33 0.66 17.40 16.51 14.99 17.40 16.51 14.99 - 0.00 - 44 0.10 Max 4.70 3.04 0.51 0.53 0.81 17.65 16.66 16.00 17.65 16.66 16.00 - 0.25 - 0.035 0.050 Typ Min 0.165 0.090 - 0.013 0.026 0.685 0.650 0.590 0.685 0.650 0.590 - 0.000 - 44 0.004 Max 0.185 0.120 0.020 0.021 0.032 0.695 0.656 0.630 0.695 0.656 0.630 - 0.010 - inches Figure 8. PLCC44 - 44 lead Plastic Leaded Chip Carrier, square, Package Outline D D1 1N A1 A2 B1 Ne E1 E F 0.51 (.020) D2/E2 B e 1.14 (.045) Nd A R CP PLCC Drawing is not to scale. 10/12 M27W102 Table 13. TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 14mm, Package Mechanical Data mm Symb Typ A A1 A2 B C D D1 E e L N CP 0.50 0.05 0.95 0.17 0.10 13.80 12.30 9.90 - 0.50 0 40 0.10 Min Max 1.20 0.15 1.05 0.27 0.21 14.20 12.50 10.10 - 0.70 5 0.020 0.002 0.037 0.007 0.004 0.543 0.484 0.390 - 0.020 0 40 0.004 Typ Min Max 0.047 0.006 0.041 0.011 0.008 0.559 0.492 0.398 - 0.028 5 inches Figure 9. TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 14mm, Package Outline A2 1 N e E B N/2 D1 D A CP DIE C TSOP-a A1 L Drawing is not to scale. 11/12 M27W102 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in lif e support devices or systems without express written approval of STMicroelectronics. The ST logo is registered trademark of STMicroelectronics (R) 1998 STMicroelectronics - All Rights Reserved All other names are the property of their respective owners. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://w ww.st.com 12/12 |
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