262,144-Word x 16-Bit or 524,288-Word x 8-Bit One Time PROM
DESCRIPTION
The MR27V402D is a 4Mbit electrically Programmable Read-Only Memory whose configuration can
be electrically switched between 262,144 word x 16bit and 524,288 word x 8bit. The MR27V402D
operates on a single +3V-3.3V power supply and is TTL compatible. Since the MR27V402D
operates asynchronously , external clocks are not required , making this device easy-to-use. The
MR27V402D is suitable as large-capacity fixed memory for microcomputers and data terminals. It is
manufactured using a CMOS double silicon gate technology and is offered in 40-pin DIP, 40-pin
SOP or 44-pin TSOP packages.
FEATURES
• 262,144 word x 16bit / 524,288 word x 8bit electrically switchable configuration
• Single +3V-3.3V power supply
• Access time 90ns access time (Vcc=+3V)
70ns access time (Vcc=+3.3V)
VCC power supply current
Input "H" level
Input "L" level
Output "H" level
Output "L" level
Program voltage
V
power supply voltage
CC
Voltage is relative to Vss
AC Characteristics
Parameter
Address set-up time
OE set-up time
Data set-up time
Address hold time
Data hold time
Output float delay from OE
voltage set-up time
V
PP
Program pulse width
Data valid from OE
Address hold from OE high
Symbol
I
LI
I
PP2
I
CC
V
IH
V
IL
V
OH
V
OL
V
PP
V
CC
Symbol
T
AS
T
OES
T
DS
T
AH
T
DH
T
OHZ
T
VS
T
PW
T
OE
T
AHO
Condition
V
I=VCC
CE=V
+0.5V
IL
Min.Max.
-
-
-
=-400µA
OH
=2.1mA
I
OL
-
-
3.0
-0.5
2.4
-
-
-
(V
=4.0V±0.1V,Vpp=9.75V±0.25V,Ta=25°C±5°C)
cc
Condition
-
-
3.9
Min.Max.
100
2
100
-
-
-
-
2
100ns
0
2
-
-
0
Typ.
-
-
--
-
-
-
-
9.75
4.0
Typ.
-
-
--
-
-
-
10
--
--
(Ta=25°C
10
50
50
V
+0.5
CC
0.8
-
0.45
10.09.5
4.1
-
-
-
-
-
100
-
119
100
-
±5°C)
Unit
µA
mA
mA
V
V
VI
V
V
V
Unit
ns
µs
ns
µs
ns-
µs
µs
ns
ns
Pin Check Function
Pin Check Function is to check contact between each device-pin and each socket-lead with EPROM
programmer.
Setting up address as the following condition call the preprogrammed codes on device outputs.
±0.3V,CE=OE=V
A8 A9
A0
A1
A2 A3
A4
A5 A6
(Vcc=3.3V
A7
010101010VH* 0
1
1
0
0
0
1
1
1
0
VH*
A10
1
A11 A12
1
0
,BYTE/Vpp=V
IL
A14 A15
A13
,Ta=25°C±5°C)
IH
A16
01010
1
1011
0
A17
0
DATA
FF00
00FF
FFFFOther conditions
* :VH=8V
±0.25V
8
Consecutive Programming Waveforms
A0 - A17
MR27V402D
t
AS
t
PW
CE
High
OE
t
DS
D0 - D15
t
VS
BYTE/V
PP
Consecutive Program Verify Waveforms
DinDin
t
AH
t
DH
A0 - A17
CE
OE
D0 - D15
BYTE/V
PP
t
ACC
High
t
AHO
t
OE
Dout
t
OHZ
Dout
9.75V
9
Program and Program Verify Cycle Waveforms
A0 - A17
MR27V402D
CE
OE
D0 - D15
BYTE/V
PP
t
OHZ
t
AS
t
PW
t
OES
t
DS
t
DH
Din
t
OE
Dout
t
AHO
t
OHZ
9.75V
PIN Capacitance
Parameter
Input
BYTE/V
PP
Output
Symbol
C
IN1
C
IN2
C
OUT
Condition
V
=0V
I
V
=0V
O
(VCC=3.3V, Ta=25°C, f=1MHz)
Min.Max.
-
Typ.
-
--
--
Unit
12
60
15
pF
10
Programming / Verify Flow Chart
MR27V402D
Programming
Bad insertion
Increment Address
Start
NO
Pin Check
Address = First location
VCC=4.0V
VPP=9.75V
Program 10µs
NO
Last Address ?
YES
OK
Verify
Start
Pin Check
OK
Address = First location
VCC=3.0V
V
=3.0V
PP
Verify (One Byte)
V
=3.6V
CC
V
=3.6V
PP
Verify (One Byte)
NO
Bad insertion
NG
PASS
NG
Increment Address
Address = First location
X=0
Verify (One Byte)
PASS
NO
Last Address ?
YES
VCC=3.0V
VPP=3.0V
Verify (One Byte)
PASS
PASS
Device PassedDevice Failed
NG
X=X+1
YES
X=2?
NO
Program 10µs
NG
Device PassedDevice Failed
11
Semiconductor
NOTICE
The information contained herein can change without notice owing to product and/or technical improvements. Before using the product, please make sure that the information being referred to is up-todate.
The outline of action and examples for application circuits described herein have been chosen as an
explanation for the standard action and performance of the product. When planning to use the product,
please ensure that the external conditions are reflected in the actual circuit, assembly, and program
designs.
When designing your product, please use our product below the specified maximum ratings and within
the specified operating ranges including, but not limited to, operating voltage, power dissipation, and
operating temperature.
Oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range.
Neither indemnity against nor license of a third party’s industrial and intellectual property right, etc. is
granted by us in connection with the use of the product and/or the information and drawings contained
herein. No responsibility is assumed by us for any infringement of a third party’s right which may result
from the use thereof.
The products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer
electronics, etc.). These products are not authorized for use in any system orapplication that requires
special or enhanced quality and reliability characteristics nor in any system or application where the
failure of such system or application may result in the loss or damage of property, or death or injury to
humans. Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems.
Certain products in this document may need government approval before they can be exported to particular countries. The purchaser assumes the responsibility of determining the legality of export of these
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No part of the contents cotained herein may be reprinted or reproduced without our prior permission.
All brand, company and product names are the trademarks or registered trademarks of their respective
owners.
Copyright 1998 Oki Electric Industry Co., Ltd.
Marketing Communications Team (RB)
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