Mbit (512Kb Voltage EPROM VOLTAGE READ OPERATION: 2.7V 3.6V FAST

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Mbit (512Kb Voltage EPROM VOLTAGE READ OPERATION: 2.7V 3.6V FAST

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M27W401
Mbit (512Kb Voltage EPROM
VOLTAGE READ OPERATION: 2.7V 3.6V FAST READ ACCESS TIME: 70ns 3.0V 3.6V 80ns 2.7V 3.6V
COMPATIBLE with M27C4001 POWER CONSUMPTION: 15µA maxStandby Current 15mA maxActive Current 5MHz
PLCC32 TSOP32
PROGRAMMING TIME 100µs/byte (typical) HIGH RELIABILITY CMOS TECHNOLOGY 2,000V Protection 200mA Latchup Protection Immunity
ELECTRONIC SIGNATURE Manufacturer Code: Device Code:
Figure Logic Diagram
DESCRIPTION M27W401 voltage Mbit EPROM offered range (one time programmable). ideally suited microprocessor systems requiring large data program storage organised 524,288 bits.
A0-A18
Q0-Q7
M27W401
Table Signal NameA0-A18 Q0-Q7 Address Inputs Data Outputs Chip Enable Output Enable Program Supply Supply Voltage Ground
AI01590
July 1998
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M27W401
Figure Connections Figure TSOP Connection
M27W401
AI01591
M27W401 (Normal)
AI01592
Table Absolute Maximum Ratings
Symbol TBIAS TSTG Parameter Ambient Operating Temperature Temperature Under Bias Storage Temperature Input Output Voltage (except Supply Voltage Voltage Program Supply Voltage Value 13.5 Unit
Note: Except rating "Operating Temperature Range", stresses above those listed Table "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only operation device these other conditions above those indicated Operating sections this specification implied. Exposure Absolute Maximum Rating conditions extended periods affect device reliability. Refer also STMicroelectronics SURE Program other relevant quality documents. Minimum voltage Input Output -0.5V with possible undershoot -2.0V period less than 20ns. Maximum voltage Output +0.5V with possible overshoot period less than 20ns. Depends range.
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M27W401
Table Operating ModeMode Read Output Disable Program Verify Program Inhibit Standby Electronic Signature
Note: VIL, 0.5V.
Pulse
Q0-Q7 Data Hi-Z Data Data Hi-Z Hi-Z Code
Table Electronic Signature
Identifier Manufacturer's Code Device Code Data
M27W401 operates read mode with supply voltage 2.7V 85°C temperature range. decrease operating power allows either reduction size battery increase time between battery recharges. M27W401 offered PLCC32 TSOP32 20mm) packages. DEVICE OPERATION operating modes M27W401 listed Operating Modes table. single power supply required read mode. inputs levels except Electronic Signature. Read Mode M27W401 control functions, both which must logically active order obtain data outputs. Chip Enable power control should used device selection. Output Enable output control should used gate data output pins, independent device selection. Assuming that addresses stable, address access time (tAVQV) equal delay from output (tELQV). Data available output after delay GLQV from falling edge assuming that been addresses have been stable least tAVQV-tGLQV.
Standby Mode M27W401 standby mode which reduces supply current from 15mA 15µA with voltage operation 3.6V, Read Mode Characteristics table details. M27W401 placed standby mode applying CMOS high signal input. When standby mode, outputs high impedance state, independent input. Line Output Control Because EPROMs usually used larger memory arrays, this product features line control function which accommodates multiple memory connection. line control function allows: lowest possible memory power dissipation, complete assurance that output contention will occur. most efficient these control lines, should decoded used primary device selecting function, while should made common connection devices array connected READ line from system control bus. This ensures that deselected memory devices their power standby mode that output pins only active when data required from particular memory device.
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M27W401
Table Measurement ConditionHigh Speed Input Rise Fall Times Input Pulse Voltages Input Output Timing Ref. Voltages 10ns 1.5V Standard 20ns 0.4V 2.4V 0.8V
Figure Testing Input Output Waveform
Figure Testing Load Circuit
1.3V
High Speed 1.5V DEVICE UNDER TEST 2.0V 0.8V
AI01822
1N914
3.3k
Standard 2.4V
0.4V
30pF High Speed 100pF Standard includes capacitance
AI01823B
Table Capacitance MHz)
Symbol COUT Parameter Input Capacitance Output Capacitance Test Condition VOUT Unit
Note: Sampled only, 100% tested.
System Considerations power switching characteristics Advanced CMOS EPROMs require careful decoupling devices. supply current, three segments that interest system designer: standby current level, active current level, transient current peaks that produced falling rising edges magnitude transient current peaks dependent capacitive inductive loading device output. associated transient voltage peaks suppressed complying with line output
control properly selected decoupling capacitors. recommended that 0.1µF ceramic capacitor used every device between VSS. This should high frequency capacitor inherent inductance should placed close device possible. addition, 4.7µF bulk electrolytic capacitor should used between every eight devices. bulk capacitor should located near power supply connection point.The purpose bulk capacitor overcome voltage drop caused inductive effects traces.
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M27W401
Table Read Mode Characteristics 85°C; 2.7V 3.6V; VCC)
Symbol ICC1 ICC2 Parameter Input Leakage Current Output Leakage Current Supply Current Supply Current (Standby) Supply Current (Standby) CMOS Program Current Input Voltage Input High Voltage Output Voltage Output High Voltage 2.1mA -400µA Test Condition VOUT VIL, VIL, IOUT 0mA, 5MHz, 3.6V 0.2V, 3.6V -0.6 Unit
Note: must applied simultaneously with before removed simultaneously after Maximum voltage Output +0.5V.
Table Read Mode Characteristics 85°C; 2.7V 3.6V; VCC)
M27W401 Test Condition tAVQV tELQV tGLQV tEHQZ tGHQZ tAXQX tACC Address Valid Output Valid Chip Enable Output Valid Output Enable Output Valid Chip Enable High Output Hi-Z Output Enable High Output Hi-Z Address Transition Output Transition VIL, VIL, -100 (-120/-150/-200)
Symbol
Parameter
Unit
3.0V 3.6V 2.7V 3.6V 2.7V 3.6V
Note: must applied simultaneously with before removed simultaneously after Sampled only, 100% tested. Speed obtained with High Speed measurement conditions.
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M27W401
Figure Read Mode Waveform
A0-A18
VALID tAVQV tAXQX
VALID
tGLQV tELQV Q0-Q7 tGHQZ Hi-Z tEHQZ
AI00724B
Table Programming Mode Characteristics 6.25V 0.25V; 12.75V 0.25V)
Symbol Parameter Input Leakage Current Supply Current Program Current Input Voltage Input High Voltage Output Voltage Output High Voltage Voltage 2.1mA -400µA 11.5 12.5 -0.3 Test Condition Unit
Note: must applied simultaneously with before removed simultaneously after
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M27W401
Table Programming Mode Characteristics 6.25V 0.25V; 12.75V 0.25V)
Symbol tAVEL tQVEL tVPHEL tVCHEL tELEH tEHQX tQXGL tGLQV tGHQZ tGHAX tVPS tVCS tOES tDFP Parameter Address Valid Chip Enable Input Valid Chip Enable High Chip Enable High Chip Enable Chip Enable Program Pulse Width Chip Enable High Input Transition Input Transition Output Enable Output Enable Output Valid Output Enable High Output Hi-Z Output Enable High Address Transition Test Condition Unit
Note: must applied simultaneously with before removed simultaneously after Sampled only, 100% tested.
Figure Programming Verify Modes Waveform
A0-A18 tAVPL Q0-Q7 tQVEL tVPHEL tVCHEL tELEH DATA
VALID
DATA tEHQX
tGLQV
tGHQZ
tGHAX
tQXGL
PROGRAM
VERIFY
AI00725
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M27W401
Figure Programming Flowchart PRESTO Programming Algorithm PRESTO Programming Algorithm allows whole array programmed with guaranteed margin, typical time 52.5 seconds. Programming with PRESTO consists applying sequence 100µs program pulses each byte until correct verify occurs (see Figure During programming verify operation, MARGIN MODE circuit automatically activated order guarantee that each cell programmed with enough margin. overprogram pulse applied since verify MARGIN MODE much higher than 3.6V, provides necessary margin each programmed cell. Program Inhibit Programming multiple M27W401s parallel with different data also easily accomplished. Except like inputs including parallel M27W401 common. level pulse applied M27W401's input, with 12.75V, will program that M27W401. high level input inhibits other M27W401s from being programmed. Program Verify verify (read) should performed programmed bits determine that they were correctly programmed. verify accomplished with VIH, 12.75V 6.25V. On-Board Programming M27W401 directly programmed application circuit. relevant Application Note AN620. Electronic Signature Electronic Signature (ES) mode allows reading binary code from EPROM that will identify manufacturer type. This mode intended programming equipment automatically match device programmed with corresponding programming algorithm. mode functional 25°C ambient temperature range that required when programming M27W401. activate mode, programming equipment must force 11.5V 12.5V address line M27W401 with PP=VCC=5V. identifier bytes then sequenced from device outputs toggling address line from VIH. other address lines must held during Electronic Signature mode. Byte (A0=V represents manufacturer code byte (A0=VIH) device identifier code. STMicroelectronics M27W401, these identifier bytes given Table read-out outputs Note that M27W401 M27C4001 have same identifier bytes.
6.25V, 12.75V
100µs Pulse VERIFY Last Addr Addr
FAIL
CHECK BYTES 1st: 2nd: 4.2V
AI00760B
Programming M27W401 been designed fully compatible with M27C4001 same electronic signature. result M27W401 programmed M27C4001 same programming equipmemnt applying 12.75V 6.25V same PRESTO algorithm. When delivered, bits M27W401 state. Data introduced selectively programming '0's into desired locations. Although only '0's will programmed, both '1's '0's present data word. M27W401 programming mode when input 12.75V, pulsed VIL. data programmed applied bits parallel data output pins. levels required address data inputs TTL. specified 6.25V 0.25V.
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M27W401
Table Ordering Information Scheme
Example: Device Type M27V401
Speed (1,2) -100 Design -120 -150 -200 Package PLCC32 TSOP32: 20mm Temperature Range 85°C Option =Tape Reel Packing
Note: High Speed, Characteristics section further information. This speed also guarantees 70ns access time 3.0V 3.6V. These speeds replaced 100ns.
list available options (Speed, Package, etc.) further information aspect this device, please contact Sales Office nearest you.
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M27W401
Table PLCC32 lead Plastic Leaded Chip Carrier, rectangular, Package Mechanical Data
Symb 0.89 1.27 2.54 1.52 0.33 0.66 12.32 11.35 9.91 14.86 13.89 12.45 0.00 0.10 3.56 2.41 0.38 0.53 0.81 12.57 11.56 10.92 15.11 14.10 13.46 0.25 0.035 0.050 inches 0.100 0.060 0.013 0.026 0.485 0.447 0.390 0.585 0.547 0.490 0.000 0.004 0.140 0.095 0.015 0.021 0.032 0.495 0.455 0.430 0.595 0.555 0.530 0.010
Figure PLCC32 lead Plastic Leaded Chip Carrier, rectangular, Package Outline
0.51 (.020)
D2/E2
1.14 (.045)
PLCC
Drawing scale.
10/12
M27W401
Table TSOP32 lead Plastic Thin Small Outline, 20mm, Package Mechanical Data
Symb 0.50 0.05 0.95 0.15 0.10 19.80 18.30 7.90 0.50 0.10 1.20 0.15 1.05 0.27 0.21 20.20 18.50 8.10 0.70 0.020 0.002 0.037 0.006 0.004 0.780 0.720 0.311 0.020 0.004 0.047 0.007 0.041 0.011 0.008 0.795 0.728 0.319 0.028 inche
Figure TSOP32 lead Plastic Thin Small Outline, 20mm, Package Outline
TSOP-a
Drawing scale.
11/12
M27W401
Information furnished believed accurate reliable. However, STMicroelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights STMicroelectronics. Specifications mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. STMicroelectronics products authorized critical components life support devices systems without express written approval STMicroelectronics. logo registered trademark STMicroelectronics 1998 STMicroelectronics Rights Reserved other names property their respective owners. STMicroelectronics GROUP COMPANIES Australia Brazil Canada China France Germany Italy Japan Korea Malaysia Malta Mexico Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U.S.A. http://www.st.com
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Mbit (512Kb Voltage EPROM VOLTAGE READ OPERATION: 2.7V 3.6V FAST

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