OKI MSM27V3255CZ Datasheet

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Semiconductor

MSM27V3255CZ

1,048,576-Double Word x 32-Bit or 2,097,152-Word x 16-Bit
4-Double Word x 32-Bit or 8-Word x 16-Bit Page Mode One Time PROM

DESCRIPTION

The MSM27V3255CZ is a 32Mbit electrically Programmable Read-Only Memory with page mode. Its
configuration can be electrically switched between 1,048,576 double word x 32bit and 2,097,152
word x 16bit. The MSM27V3255CZ operates on a single +3.3V power supply and is TTL compatible.
The MSM27V3255CZ provides Page mode which can greatly reduce the read access time. Since the
MSM27V3255CZ operates asynchronously , external clocks are not required , making this device
easy-to-use. The MSM27V3255CZ 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
70-pin SSOP package.

FEATURES

• 1,048,576 double word x 32bit / 2,097,152 word x 16bit electrically switchable configuration

• Single +3.3V power supply

• Access time 100ns
Page mode access time 30ns

• Input / Output TTL compatible

• Three-state output

• Packages
70-pin plastic SSOP (SSOP70-P-500-0.80-K)

1A

October 1998

1

PIN CONFIGURATION (TOP VIEW)

V

A0
A1
A2
A3
A4
A5

V

CC

D0

D16

D1

D17

V

SS

V

CC

D2

D18

D3

D19

D4

D20

D5

D21

V

SS

V

CC

D6

D22

D7

D23

V

SS

A6
A7
A8

A9
A10
A11
A12

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36

PP

NC
NC
WORD
OE
CE

V

SS

D31/A-1
D15
D30
D14
V

SS

V

CC

D29
D13
D28
D12
D27
D11
D26
D10
V

SS

V

CC

D25
D9
D24
D8

V

CC

A19
A18
A17
A16
A15
A14
A13

MSM27V3255CZ

PIN NAMES

FUNCTIONS

D31/A-1 Data output / Address input
A0 - A19 Address input
D0 - D30 Data output

CE
OE

V

CC

V

SS

WORD

V

PP

NC

Chip enable
Output enable
Power supply voltage

GND

Mode switch
Program power supply voltage
Non connection

70-pin SSOP

2

BLOCK DIAGRAM

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19

Address Buffer

A-1

X16/X32 Switch

CE WORDOE

CE PGMOE

Row Decoder

Column Decoder

MSM27V3255CZ

Memory Matrix

1,048,576X32-Bit or 2,097,152X16-Bit

Multiplexer & Page Data Latch

Output Buffer

FUNCTION TABLE

MODE
READ (32-Bit)
READ (16-Bit)

OUTPUT DISABLE

STAND-BY
PROGRAM

PROGRAM INHIBIT
PROGRAM VERIFY

* : Don't Care

D0

D2

D4

D6

D8

D10

D12

D14

D16

D18

D20

D22

D24

D1

D3

D5

D7

D9

D11

D13

D15

D17

D19

D21

D23

In 16-bit output mode, these pins are
three-stated and pin D31 functions
as the A-1 address pin.

CE OE

LL
L

L

LH

H

*

WORD

H

L

H

L

H

L

V

PP

LH
H H Hi-Z

L

11.0V

HL

V

CC

D16 - D30D0 - D15

D

D

OUT

3.3V

*

Hi-Z
Hi-Z

Hi-Z

D

IN

Hi-Z

5.0V
D

OUT

Hi-Z

D25

OUT

D26

D27

D28

D29

D30

D31

D31/A-1

L/H

*

*

L/H

L/H

3

ABSOLUTE MAXIMUM RATINGS

MSM27V3255CZ

Parameter
Operating temperature under bias
Storage temperature

Input voltage
Output voltage
Power supply voltage
Program power supply voltage
Power dissipation per package

Symbol

Topr

T

stg

V

I

V

O

V

CC

V

PP

P

D

-

relative to V

-

SS

RECOMMENDED OPERATING CONDITIONS FOR READ

Parameter Symbol
VCC power supply voltage
VPP power supply voltage
Input "H" level
Input "L" level

Voltage is relative to Vss

V

CC

V

PP

V

IH

V

IL

Condition

VCC=3.0V-3.6V

0 to 70

-55 to 125
+ 0.5

CC

(Ta=0 to 70°C)

Min. Max.

3.0

-0.5

Typ.

-

-

-

-

3.6
+0.5

V

CC

+0.52.2

V

CC

0.6-0.5

UnitValueCondition

°C
°C

V-0.5 to V
V-0.5 to VCC + 0.5
V-0.5 to 7
V-0.5 to 12.5

W1.0

Unit

V
V
V
V

4