OKI MR27V402D Technical data

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Semiconductor

MR27V402D

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)

• Input / Output TTL compatible

• Three-state output

• Packages 40-pin plastic DIP (DIP40-P-600-2.54)
40-pin plastic SOP (SOP40-P-525-1.27-K)
44-pin plastic TSOP (TSOP II 44-P-400-0.80-K)

1A

February 1999

1

PIN CONFIGURATION (TOP VIEW)

MR27V402D

A17

A7
A6
A5
A4
A3
A2
A1
A0

CE

V

SS

OE

D0
D8
D1
D9
D2

D10

D3

D11

10
11
12
13
14
15
16
17
18
19
20

NC

1

NC

2

A8

401
2
3
4
5
6
7
8
9

A9

39

A10

38

A11

37

A12

36

A13

35

A14

34

A15

33

A16

32

BYTE/Vpp

31

V

30

SS

D15/A-1

29

D7

28

D14

27

D6

26

D13

25

D5

24

D12

23

D4

22

V

21

CC

A17

A7
A6
A5
A4
A3
A2
A1
A0

CE

V

SS

OE

D0
D8
D1
D9
D2

D10

D3

D11

3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21

NC

44

NC

43

A8

42

A9

41

A10

40

A11

39

A12

38

A13

37

A14

36

A15

35

A16

34

BYTE/Vpp

33

V

32

SS

D15/A-1

31

D7

30

D14

29

D6

28

D13

27

D5

26

D12

25

D4

24

V

2322

CC

40-pin DIP , SOP

PIN NAMES

D15/A-1 Data output / Address input

A0-A17 Address input
D0-D14 Data output

CE
OE

V

CC

V

SS

BYTE/V

NC

PP

44-pin TSOP

FUNCTIONS

Chip enable
Output enable
Power supply voltage
GND
Mode switch / Program power supply voltage
Non connection

2

BLOCK DIAGRAM

MR27V402D

A-1

X8/X16 Switch

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

Address Buffer

CE BYTE/V

OE

CE PGMOE

Memory Matrix

Row Decoder

262,144X16-Bit or 524,288X8-Bit

Multiplexer

Output Buffer

Column Decoder

D0

D1D2D3D4D5D6D7D8D9

PP

D10

D11

D12

D13

D14

D15

FUNCTION TABLE

MODE
READ (16-Bit)
READ (8-Bit)

OUTPUT DISABLE

STAND-BY
PROGRAM

PROGRAM INHIBIT
PROGRAM VERIFY

*: Don't Care

In 8-bit output mode, these pins are
three-stated and pin D15 functions
as the A-1 address pin.

PP

V

CC

3.0V
to

3.3V

4.0V

D

OUT

D8 - D14D0 - D7

D

Hi-Z
Hi-Z

Hi-Z

D

D

L

H

*

BYTE/V

H

L

H

L

H

L

CE OE

LL
L

L

H

LH

H H Hi-Z

9.75V

HL

D15/A-1

OUT

L/H

*

*

IN

OUT

3

ABSOLUTE MAXIMUM RATINGS

MR27V402D

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

RECOMMENDED OPERATING CONDITIONS

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

VCC=2.7V-3.6V

-

relative to V

-

Condition

SS

0 to 70

-55 to 125
+ 0.5

CC

(Ta=0 to 70°C)

Min. Max.

2.7

-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 5
V-0.5 to 11.5

W1.0

Unit

V
V
V
V

4