M27C4002 4Mbit(256Kb x16)UV EPROM and OTP EPROM s5V±10%SUPPLY VOLTAGE in READ
OPERATION
s ACCESS TIME:45ns
s LOW POWER CONSUMPTION:
–Active Current70mA at10MHz
–Standby Current100μA
s PROGRAMMING VOLTAGE:12.75V±0.25V
s PROGRAMMING TIME:100μs/word
s ELECTRONIC SIGNATURE
–Manufacturer Code:20h
–Device Code:44h
DESCRIPTION
The M27C4002is a4Mbit EPROM offered in the
two ranges UV(ultra violet erase)and OTP(one
time programmable).It is ideally suited for micro-
processor systems requiring large programs and
is organised as262,144words of16bits.
The FDIP40W(window ceramic frit-seal package)
and the JLCC44W(J-lead chip carrier packages)
have transparent lids which allow the user to ex-
pose the chip to ultraviolet light to erase the bit pat-tern.A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only one time and erasure is not required,the M27C4002is offered in PDIP40,PLCC44and TSOP40(10x20mm)packages.
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M27C4002
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Table1.Signal Names
A0-A17Address Inputs
Q0-Q15Data Outputs
E Chip Enable
G Output Enable
V PP Program Supply
V CC Supply Voltage
V SS Ground
NC Not Connected Internally
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M27C4002
Table 2.Absolute Maximum Ratings (1)
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 condi-tions for extended periods may affect device reliability.Refer also to the STMicroelectronics SURE Program and other relevant qual-ity 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 V CC +0.5V with possible overshoot to V CC +2V for a period less than 20ns.
3.Depends on range.
Table 3.Operating Modes
Note:X =V IH or V IL ,V ID =12V ±0.5V.
Table 4.Electronic Signature
Note:Outputs Q15-Q8are set to '0'.
Symbol Parameter
Value Unit T A Ambient Operating Temperature (3)–40to 125°C T BIAS Temperature Under Bias –50to 125°C T STG Storage Temperature
–65to 150°C V IO (2)Input or Output Voltage (except A9)–2to 7V V CC Supply Voltage –2to 7V V A9(2)A9Voltage
–2to 13.5V V PP
Program Supply Voltage
–2to 14
V
Mode
E G A9V PP Q15-Q0Read
V IL V IL X V CC or V SS Data Out Output Disable V IL V IH X V CC or V SS
Hi-Z Program V IL Pulse V IH X V PP Data In Verify
V IH V IL X V PP Data Out Program Inhibit V IH V IH X V PP Hi-Z Standby
V IH X X V CC or V SS
Hi-Z Electronic Signature
V IL
V IL
V ID
V CC
Codes
Identifier A0Q7Q6Q5Q4Q3Q2Q1Q0Hex Data Manufacturer’s Code V IL 0010000020h Device Code
V IH
1
1
44h
DEVICE OPERATION
The operating modes of the M27C4002are listed in the Operating Modes table.A single power sup-ply is required in the read mode.All inputs are TTL levels except for V PP and 12V on A9for Electronic Signature.Read Mode
The M27C4002has 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,indepen-dent of device selection.Assuming that the ad-dresses 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 t GLQV from the falling edge of G,assuming that E has been low and the addresses have been sta-ble for at least t AVQV -t GLQV .
M27C4002
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Standby Mode
The M27C4002has a standby mode which reduc-es the supply current from 50mA to 100μA.The M27C4002is placed in the standby mode by ap-plying a CMOS high signal to the E input.When in the standby mode,the outputs are in a high imped-ance state,independent of the G input.Two Line Output Control
Because EPROMs are usually used in larger memory arrays,the product features a 2line con-trol function which accommodates the use of mul-tiple memory connection.The two line control function allows:
a.the lowest possible memory power dissipation,
https://www.doczj.com/doc/3b12968350.html,plete 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 prima-ry 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 deselect-ed 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.
Table 5.AC Measurement Conditions
High Speed
Standard Input Rise and Fall Times ≤10ns ≤20ns Input Pulse Voltages
0to 3V 0.4V to 2.4V Input and Output Timing Ref.Voltages
1.5V
0.8V
and 2V
Table 6.Capacitance (1)(T A =25°C,f =1MHz)
Note: 1.Sampled only,not 100%tested.
Symbol Parameter
Test Condition
Min
Max Unit C IN Input Capacitance V IN =0V 6pF C OUT
Output Capacitance
V OUT =0V
12
pF
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M27C4002
Table 7.Read Mode DC Characteristics (1)
(T A =0to 70°C or –40to 85°C;V CC =5V ±5%or 5V ±10%;V PP =V CC )
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
2.Maximum DC voltage on Output is V CC +0.5V.
Table 8A.Read Mode AC Characteristics (1)
(T A =0to 70°C or –40to 85°C;V CC =5V ±5%or 5V ±10%;V PP =V CC )
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
2.Sampled only,not 100%tested.
3.Speed obtained with High Speed AC measurement conditions.
Symbol Parameter
Test Condition Min
Max Unit I LI Input Leakage Current 0V ≤V IN ≤V CC ±10μA I LO
Output Leakage Current
0V ≤V OUT ≤V CC ±10μA I CC Supply Current
E =V IL ,G =V IL ,I OUT =0mA,f =10MHz 70mA E =V IL ,G =V IL ,I OUT =0mA,f =5MHz
50mA I CC1Supply Current (Standby)TTL E =V IH 1mA I CC2Supply Current (Standby)CMOS E >V CC –0.2V 100μA I PP Program Current V PP =V CC
10μA V IL Input Low Voltage –0.30.8V V IH (2)Input High Voltage 2
V CC +1V V OL Output Low Voltage I OL =2.1mA 0.4
V V OH
Output High Voltage TTL I OH =–400μA 2.4V Output High Voltage CMOS
I OH =–100μA
V CC –0.7V
V
Symbol
Alt
Parameter
Test Condition
M27C4002
Unit
-45(3)-60(3)-70
Min
Max Min
Max Min
Max t AVQV t ACC Address Valid to Output Valid E =V IL ,G =V IL
456070ns t ELQV t CE Chip Enable Low to Output Valid G =V IL 456070ns t GLQV t OE Output Enable Low to Output Valid E =V IL 253035ns t EHQZ (2)t DF Chip Enable High to Output Hi-Z G =V IL 030030030ns t GHQZ (2)t DF Output Enable High to Output Hi-Z E =V IL 030
030
030
ns t AXQX
t OH
Address Transition to Output Transition
E =V IL ,G =V IL
00ns
M27C4002
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Table 8B.Read Mode AC Characteristics (1)
(T A =0to 70°C or –40to 85°C;V CC =5V ±5%or 5V ±10%;V PP =V CC )
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
2.Sampled only,not 100%tested.
Table 8C.Read Mode AC Characteristics (1)
(T A =0to 70°C or –40to 85°C;V CC =5V ±5%or 5V ±10%;V PP =V CC )
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
2.Sampled only,not 100%tested.
Symbol
Alt
Parameter
Test Condition
M27C4002
Unit
-80
-90
-10
Min
Max Min
Max Min
Max t AVQV t ACC Address Valid to Output Valid E =V IL ,G =V IL
8090100ns t ELQV t CE Chip Enable Low to Output Valid G =V IL 8090100ns t GLQV t OE Output Enable Low to Output Valid E =V IL 404050ns t EHQZ (2)t DF Chip Enable High to Output Hi-Z G =V IL 030030030ns t GHQZ (2)t DF Output Enable High to Output Hi-Z E =V IL 030
030
030
ns t AXQX
t OH
Address Transition to Output Transition
E =V IL ,G =V IL
000ns Symbol
Alt
Parameter
Test Condition
M27C4002
Unit
-12
-15
-20
Min
Max Min
Max Min
Max t AVQV t ACC Address Valid to Output Valid E =V IL ,G =V IL
120150200ns t ELQV t CE Chip Enable Low to Output Valid G =V IL 120150200ns t GLQV t OE Output Enable Low to Output Valid E =V IL 606070ns t EHQZ (2)t DF Chip Enable High to Output Hi-Z G =V IL 040050080ns t GHQZ (2)t DF Output Enable High to Output Hi-Z E =V IL 040
050
080
ns t AXQX
t OH
Address Transition to Output Transition
E =V IL ,G =V IL
000ns
M27C4002
System Considerations
The power switching characteristics of Advanced CMOS EPROMs require careful decoupling of the devices.The supply current,I CC,has three seg-ments 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 the transient current peaks is dependent on the output capacitive and inductive loading of the de-vice.The associated transient voltage peaks can be suppressed by complying with the two line out-put control and by properly selected decoupling capacitors.It is recommended that a0.1μF ceram-ic capacitor be used on every device between V CC and V SS.This should be a high frequency capaci-tor of low inherent inductance and should be placed as close to the device as possible.In addi-tion,a4.7μF bulk electrolytic capacitor should be used between V CC and V SS for every eight devic-es.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.
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M27C4002
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Table 9.Programming Mode AC Characteristics (1)
(T A =25°C;V CC =6.25V ±0.25V;V PP =12.75V ±0.25V)
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
Table 10.Programming Mode AC Characteristics (1)(T A =25°C;V CC =6.25V ±0.25V;V PP =12.75V ±0.25V
Note: 1.V CC must be applied simultaneously with or before V PP and removed simultaneously or after V PP .
2.Sampled only,not 100%tested.
Symbol Parameter
Test Condition Min
Max Unit I LI Input Leakage Current V IL ≤V IN ≤V IH
±10μA I CC Supply Current 50mA I PP Program Current E =V IL
50mA V IL Input Low Voltage –0.30.8V V IH Input High Voltage 2
V CC +0.5V V OL Output Low Voltage I OL =2.1mA 0.4
V V OH Output High Voltage TTL I OH =–400μA
2.4V V ID
A9Voltage
11.5
12.5
V
Symbol Alt Parameter
Test Condition
Min Max
Unit t AVEL t AS Address Valid to Chip Enable Low 2μs t QVEL t DS Input Valid to Chip Enable Low 2μs t VPHEL t VPS V PP High to Chip Enable Low 2μs t VCHEL t VCS V CC High to Chip Enable Low 2μs t ELEH t PW Chip Enable Program Pulse Width 95105μs t EHQX t DH Chip Enable High to Input Transition 2μs t QXGL t OES Input Transition to Output Enable Low 2
μs t GLQV t OE Output Enable Low to Output Valid 100ns t GHQZ t DFP Output Enable High to Output Hi-Z 0130ns t GHAX
t AH
Output Enable High to Address Transition
ns
Programming
When delivered (and after each erasure for UV EPROM),all bits of the M27C4002are in the '1'state.Data is introduced by selectively program-ming '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 only way to change a '0'to a '1'is by die exposure to ultraviolet
light (UV EPROM).The M27C4002is in the pro-gramming mode when V PP input is at 12.75V,G is at V IH and E is pulsed to V IL .The data to be pro-grammed is applied to 16bits in parallel to the data output pins.The levels required for the address and data inputs are TTL.V CC is specified to be 6.25V ±0.25V.
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M27C4002
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows the whole array to be programmed with a guaranteed margin,in a typical time of 26.5seconds.Pro-gramming with PRESTO II consists of applying a sequence of 100μs program pulses to each byte 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 provides nec-essary margin to each programmed cell.Program Inhibit
Programming of multiple M27C4002s in parallel with different data is also easily accomplished.Ex-cept for E,all like inputs including G of the parallel M27C4002may be common.A TTL low level pulse applied to a M27C4002's E input,with V PP at 12.75V,will program that M27C4002.A high level E input inhibits the other M27C4002s from being programmed.Program Verify
A verify (read)should be performed on the pro-grammed bits to determine that they were correct-ly programmed.The verify is accomplished with G at V IL ,E at V IH ,V PP at 12.75V and V CC at 6.25V.
M27C4002
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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 25°C ±5°C am-bient temperature range that is required when pro-gramming the M27C4002.To activate the ES mode,the programming equipment must force 11.5V to 12.5V on address line A9of the M27C4002with V PP =V CC =5V.Two identifier bytes may then be sequenced from the device out-puts by toggling address line A0from V IL to V IH .All other address lines must be held at V IL during Electronic Signature mode.Byte 0(A0=V IL )rep-resents the manufacturer code and byte 1(A0=V IH )the device identifier code.For the ST-Microelectronics M27C4002,these two identifier bytes are given in Table 4and can be read-out on outputs Q7to Q0.
ERASURE OPERATION (applies to UV EPROM)The erasure characteristics of the M27C4002are such that erasure begins when the cells are ex-posed to light with wavelengths shorter than ap-proximately 4000?.It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the 3000-4000?range.Research shows that constant exposure to room level fluo-rescent lighting could erase a typical M27C4002in about 3years,while it would take approximately 1week to cause erasure when exposed to direct sunlight.If the M27C4002is to be exposed to these types of lighting conditions for extended pe-riods of time,it is suggested that opaque labels be put over the M27C4002window to prevent unin-tentional erasure.The recommended erasure pro-cedure for the M27C4002is exposure to short wave ultraviolet light which has wavelength 2537?.The integrated dose (i.e.UV intensity x expo-sure time)for erasure should be a minimum of 15W-sec/cm 2.The erasure time with this dosage is approximately 15to 20minutes using an ultravio-let lamp with 12000μW/cm 2power rating.The M27C4002should be placed within 2.5cm (1inch)of the lamp tubes during the erasure.Some lamps have a filter on their tubes which should be re-moved before erasure.
M27C4002 Table11.Ordering Information Scheme
Example:M27C4002-80X C1X
Device Type
M27
Supply Voltage
C=5V
Device Function
4002=4Mbit(256Kb x16)
Speed
-45(1)=45ns
-60(1)=60ns
-70=70ns
-80=80ns
-90=90ns
-10=100ns
-12=120ns
-15=150ns
-20=200ns
V CC Tolerance
blank=±10%
X=±5%
Package
F=FDIP40W
B=PDIP40
J=JLCC44W
C=PLCC44
N=TSOP40:10x20mm
Temperature Range
1=0to70°C
6=–40to85°C
Options
X=Additional Burn-in
TR=Tape&Reel Packing
Note: 1.High Speed,see AC Characteristics section for further information.
For a list of available options(Speed,Package,etc...)or for further information on any aspect of this de-vice,please contact the STMicroelectronics Sales Office nearest to you.
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M27C4002
Table12.Revision History
Date Revision Details September1998First Issue
25-Sep-2000AN620Reference removed
30-Aug-200170ns speed class added
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M27C4002 Table13.FDIP40W-40pin Ceramic Frit-seal DIP with window,Package Mechanical Data
Symbol
millimeters inches
Typ Min Max Typ Min Max
A 5.720.225
A10.51 1.400.0200.055
A2 3.91 4.570.1540.180
A3 3.89 4.500.1530.177
B0.410.560.0160.022
B1 1.45––0.057––
C0.230.300.0090.012
D51.7952.60 2.039 2.071
D248.26–– 1.900––
E15.24––0.600––
E113.0613.360.5140.526
e 2.54––0.100––
eA14.99––0.590––
eB16.1818.030.6370.710
L 3.180.125
S 1.52 2.490.0600.098
?7.62––0.300––
α4°11°4°11°
N40
40
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M27C4002
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Table 14.PDIP40-40pin Plastic DIP,600mils width,Package Mechanical Data
Symbol
millimeters
inches Typ Min Max Typ Min Max A 4.45––0.175––A10.64
0.38–0.025
0.015–A2 3.56 3.910.1400.154B 0.380.530.0150.021B1 1.14 1.780.0450.070C 0.200.310.0080.012D 51.7852.58 2.039 2.070D248.26
–– 1.900––E 14.8016.260.5830.640E113.4613.990.5300.551e1 2.54––0.100––
eA 15.24––0.600–eB 15.2417.780.6000.700L 3.05 3.810.1200.150S 1.52 2.290.0600.090α0°15°
0°
15°N
40
40
M27C4002 Table15.JLCC44W-44lead Leadless Ceramic Chip Carrier,square window,
Package Mechanical Data
Symbol
millimeters inches
Typ Min Max Typ Min Max
A 3.94 4.830.1550.190
A1 2.29 3.050.0900.120
B0.430.530.0170.021
B10.660.810.0260.032
D17.4017.650.6850.695
D116.0016.890.6300.665
D214.7416.260.5800.640
D312.70––0.500––
E17.4017.650.6850.695
E116.0016.890.6300.665
E214.7416.260.5800.640
E312.70––0.500––
e 1.27––0.050––
K10.16––0.400––
N4444
CP0.10
0.004
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M27C4002
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Table 16.PLCC44-44lead Plastic Leaded Chip Carrier,Package Mechanical Data
Symbol
millimeters
inches Typ
Min Max Typ
Min Max A 4.20 4.700.1650.185A1 2.29 3.040.0900.120A2–0.51–0.020B 0.330.530.0130.021B10.660.810.0260.032D 17.4017.650.6850.695D116.5116.660.6500.656D214.9916.000.5900.630E 17.4017.650.6850.695E116.5116.660.6500.656E214.9916.000.5900.630e 1.27
––0.050––F 0.000.250.0000.010R 0.89––
0.035––
N 44
44
CP
0.100.004
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M27C4002
Table 17.TSOP40-40lead Plastic Thin Small Outline,10x 20mm,Package Mechanical Data
Symbol
millimeters
inches Typ
Min
Max Typ
Min
Max A 1.200.047A10.050.150.0020.006A20.95 1.050.0370.041B 0.170.270.0070.011C 0.100.210.0040.008D 19.8020.200.7800.795D118.3018.500.7200.728E 9.9010.100.3900.398e 0.50
––0.020
––L 0.500.700.0200.028α0°5°
0°5°
N 40
40
CP
0.10
0.004
M27C4002
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 life support devices or systems without express written approval of STMicroelectronics.
The ST logo is registered trademark of STMicroelectronics
All other names are the property of their respective owners.
?2001STMicroelectronics-All Rights Reserved
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