VERY VOLTAGE Megabit (512K VERY VOLTAGE READ OPERATION: 2.7V 5.5V

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VERY VOLTAGE Megabit (512K VERY VOLTAGE READ OPERATION: 2.7V 5.5V

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M27W401
VERY VOLTAGE Megabit (512K
VERY VOLTAGE READ OPERATION: 2.7V 5.5V ACCESS TIME: 150ns 200ns POWER "CMOS" CONSUMPTION: Active Current 15mA Standby Current 20µA PROGRAMMING VOLTAGE: 12.75V PROGRAMMING TIMES AROUND 48sec. (PRESTO ALGORITHM) M27W401 PROGRAMMABLE M27C4001 with IDENTICAL SIGNATURE
PLCC32
TSOP32 20mm
Figure Logic Diagram DESCRIPTION M27W401 very voltage, power Megabit Time Programmable ROM, ideally suited handheld portable microprocessor systems requiring large programs. organized 524,288 bits. M27W401 operates read mode with supply voltage 2.7V temperature range. decrease operating power allows either reduction size battery increase time between battery recharges. M27W401 also operated andard Megabit EPROM (similar M27C4001) with power supply. Table Signal Names
Address Inputs Data Outputs Chip Enable Output Enable Program Supply Supply Voltage Ground
A0-A18
Q0-Q7
M27W401
AI01590
March 1995
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M27W401
Figure Connections
Figure TSOP Connections
M27W401
AI01591
M27W401 (Normal)
AI01592
Table Absolute Maximum Ratings
Symbol TBIAS TSTG Parameter Ambient Operating Temperature Temperature Under Bias Storage Temperature Input Output Voltages (except Supply Voltage Voltage Program Supply Voltage Value 13.5 Unit
Notes: 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 SGS-THOMSON 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.
DESCRIPTION (cont'd) applications where content programmed only time erasure required, M27W401 offered both Plastic Leaded Chip Carrier Plastic thin Small Outline packages.
DEVICE OPERATION modes operation M27W401 listed Operating Modes table. single power supply required read mode. inputs levels except Electronic Signature.
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M27W401
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) isequal delay from output (tELQV). Data available output after delay tGLQV from falling edge assuming that been addresses have been stable least tAVQV-tGLQV. Standby Mode M27W401 standby mode which reduces active current from 15mA 20µA with voltage operation 2.7V (30mA 100µA with supply 5.5V), 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 ROMs 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. System Considerations power switching characteristics Advanced CMOS ROMs require careful decoupling devices. supply current, ICC, 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.
Table Operating Modes
Mode Read Output Disable Program Verify Program Inhibit Standby Electronic Signature
Note: VIL, 0.5V
Pulse
Data Hi-Z Data Data Hi-Z Hi-Z Codes
Table Electronic Signature
Identifier Manufacturer's Code Device Code Data
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M27W401
MEASUREMENT CONDITIONS
Input Rise Fall Times Input Pulse Voltages Input Output Timing Ref. Voltages 20ns 2.4V 2.0V
Figure Testing Load Circuit
1.3V
1N914
Note that Output Hi-Z defined point where data longer driven.
3.3k
Figure Testing Input Output Waveforms
DEVICE UNDER TEST 2.0V 0.8V
AI00826
100pF
2.4V
0.4V
includes capacitance
AI00828
Table Capacitance
Symbol Parameter Input Capacitance Output Capacitance Test Condition VOUT Unit
Note: Sampled only, 100% tested.
Table Read Mode Characteristics 2.7V 5.5V unless specified; VCC)
Symbol Parameter Input Leakage Current Output Leakage Current Test Condition VOUT VIL, VIL, IOUT 0mA, 5MHz, 2.7V VIL, VIL, IOUT 0mA, 5MHz, 5.5V ICC1 ICC2
Unit
Supply Current
Supply Current (Standby) Supply Current (Standby) CMOS Program Current Input Voltage Input High Voltage Output Voltage Output High Voltage Output High Voltage CMOS
0.2V, 2.7V 0.2V, 5.5V -0.3 2.1mA -400µA -100µA 0.7V
Notes: must applied simultaneously with before removed simultaneously after VPP. Maximum voltage Output +0.5V
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M27W401
Table Read Mode Characteristics 2.7V 5.5V unless specified; VCC)
M27W401 Symbol Parameter Test Condition tAVQV tELQV tGLQV tEHQZ tGHQZ
-150
-200
Unit
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,
tAXQX
Notes: must applied simultaneously with before removed simultaneously after VPP. Sampled only, 100% tested.
Figure Read Mode Waveforms
A0-A18 tAVQV tGLQV tELQV Q0-Q7
VALID tAXQX
tEHQZ
tGHQZ Hi-Z DATA
AI00724
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M27W401
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 VPP.
Table Programming Mode Characteristics 6.25V 0.25V; 12.75V 0.25V)
Symbol tAVPL tQVPL tVPHPL tVCHPL tELPL tPLPH tPHQX tQXGL tGLQV tGHQZ tGHAX tVPS tVCS tCES tOES tDFP Parameter Address Valid Program Input Valid Program High Program High Program Chip Enable Program Program Pulse Width Program 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
Notes: must applied simultaneously with before removed simultaneously after VPP. Sampled only, 100% tested.
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M27W401
Figure Programming Verify Modes Waveforms
A0-A18 tAVPL Q0-Q7 DATA tQVEL tVPHEL tVCHEL tELEH
VALID
DATA tEHQX
tGLQV
tGHQZ
tGHAX
tQXGL
PROGRAM
VERIFY
AI00725
DEVICE OPERATION (cont'd) 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. purpose bulk capacitor overcome voltage drop caused inductive effects traces.
Programming M27W401 been designed fully compatible with M27C4001. result M27W401 programmed M27C4001 same programmers applying 12.75V 6.25V VCC. M27W401 same electronic signature uses same PRESTO algorithm When delivered, bits M27W401 state. Data introduced selectively programming "0s" into desired locations. Although only "0s" will programmed, both "1s" "0s" present data word. M27W401 programming mode when input 12.75V, TTL-low. data programmed applied bits parallel data output pins. levels required address data inputs TTL. specified 6.25V 0.25V.
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M27W401
Figure Programming Flowchart
program pulse applied since verify MARGIN MODE 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 at12.75V,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 VIL, VIH,, 12.75V 6.25V. Electronic Signature Electronic Signature mode allows reading binary code that will identify manufacturer type. This mode intended programming equipment automatically match device programmed with corresponding programming algorithm. This mode functional 25°C ambient temperature range that required when programming M27W401. activate this mode, programming equipment must force 11.5V 12.5V address line M27W401, with identifier bytes then sequenced from device outputs toggling address line from VIH. other address lines must held during Electronic Signature mode. Byte (A0=VIL) represents manufacturer code byte (A0=VIH) device identifier code. SGS-THOMSON 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
PRESTO Programming Algorithm PRESTO Programming Algorithm allows whole array programmed, with guaranteed margin, typical time 52.5 seconds. Programming with PRESTO involves applying sequence 100µs program pulses each byte until correct verify occurs. During programming verify operation, MARGIN MODE circuit automatically activated order guarantee that each cell programmed with enough margin. over-
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M27W401
ORDERING INFORMATION SCHEME Example: M27W401 -150
Speed -150 -200
Package PLCC32 TSOP32 20mm
Temperature Range
Option Tape Reel Packing
list available options (Speed, Package, Temperature Range, etc.) refer current Memory Shortform catalogue. further information aspect this device, please contact SGS-THOMSON Sales Office nearest you.
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M27W401
PLCC32 lead Plastic Leaded Chip Carrier, rectangular
Symb
PLCC32
2.54 1.52 0.33 0.66 12.32 11.35 9.91 14.86 13.89 12.45 1.27 0.10 3.56 2.41 0.53 0.81 12.57 11.56 10.92 15.11 14.10 13.46 0.050
inches 0.100 0.060 0.013 0.026 0.485 0.447 0.390 0.585 0.547 0.490 0.004 0.140 0.095 0.021 0.032 0.495 0.455 0.430 0.595 0.555 0.530
D2/E2
PLCC
Drawing scale
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M27W401
TSOP32 lead Plastic Thin Small Outline, 20mm
Symb
TSOP32
1.20 0.05 0.95 0.15 0.10 19.80 18.30 7.90 0.50 0.50 0.10 0.17 1.50 0.27 0.21 20.20 18.50 8.10 0.70 0.020
inches 0.047 0.002 0.037 0.006 0.004 0.780 0.720 0.311 0.020 0.004 0.006 0.059 0.011 0.008 0.795 0.728 0.319 0.028
TSOP-a
Drawing scale
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M27W401
Information furnished believed accurate reliable. However, SGS-THOMSON Microelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights SGS-THOMSON Microelectronics. Specifications mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. SGS-THOMSON Microelectronics products authorized critical components life support devices systems without express written approval SGS-THOMSON Microelectronics. 1995 SGS-THOMSON Microelectronics Rights Reserved
SGS-THOMSON Microelectronics GROUP COMPANIES Australia Brazil China France Germany Hong Kong Italy Japan Korea Malaysia Malta Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U.S.A.
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VERY VOLTAGE Megabit (512K VERY VOLTAGE READ OPERATION: 2.7V 5.5V

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