Semiconductor

524,288-Double Words x 32-bit or 1,048,576-Words x 16-bit MaskROM
8Double Word x 32-Bit or 16Word x 16-Bit/Page Mode MASKROM

DESCRIPTION

FEATURES

Pin compatible OTP available

Packages:
70-PIN PLASTIC SSOPP
70-PIN PLASTIC TSOP(Type II)

Internal powerdown function

Tri-State output configurations

Input/Output TTL compatible

Access time
100ns Max (Normal access)
50ns Max (Page access)

524,288-double words x 32-bit / 1,048,576-words x 16-bit

Single 5.0V power supply

The OKI MSM531655E is a 524,288-double words x 32-bit or 1,048,576-words x 16-bit
CMOS Mask ROM with an asynchronous page read mode. Each page is organized 8 double
words x 32-bit or 16 words x 16-bit. It operates on a single 5.0V power supply and is TTL
compatible. The chip's asynchronous I/O requires no external clock assuring easy operation.
A power-down mode provides low power dissipation when the chip is not selected. The CE
and OE pins are provided as control signals that permit three-stated output allowing easy
memory expansion on a system bus.The MSM531655E is suited for use as large capacity
fixed memory for microcomputers and data terminals.

MSM531655E

8-double words(A2,A1,A0) or 16-words(A2,A1,A0,A-1) / Page

(MSM531655E-xxGS-K)

(MSM531655E-xxTS-K)

(SSOP70-P-500/0.8-K)

(TSOP70-P-400/0.65-K)

MSM531655E

PIN CONFIGURATION

Vcc

D16

D17

Vss

Vcc

D18

D19

D20

D21

Vss

Vcc

D22

D23

Vss

A10

A11

A12

NC
WORD

Vss

D31/A-1

D15

D30

D14

Vss

Vcc

D29

D13

D28

D12

D27

D11

D26

D10

Vss

Vcc

D25

D24

Vcc

A18

A17

A16

A15

A14

A13

Pin Name

Function

D31/A-1

Data output / address input

A0 to A18

Address input

D0 to D30

Data output

Output enable

WORD

Mode switch (H:DW/L:W)

, V

Power supply

Chip enable

MSM531655E

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9

A10
A11
A12
A13
A14
A15
A16
A17
A18

BLOCK DIAGRAM

Control

Address

Buffer

Memory Cell

Matrix

524,288 x 32 or 1,048,676 x 16

FUNCTION TABLE

D16

D18

D20

D22

D24

D10

D26

D12

D28

D14

D30

Output Switching Between 16 and 32 bits

A-1

WORD

MSB

BYTE

Input Inhibited (D31)

D16 to D31

LSB

DOUT Mode

D16--D31

D0--D15

A-1/D31

D0 to D15

Hi-Z

D16 to D31

Hi-Z

32 bit

16 bit

A-1

A18

Input Inhibited (D31)

D0 to D15

D16 to D31

32 bit(Page Mode)

D16 to D31

D0 to D15

Hi-Z

16 bit(Page Mode)

A-1

D17

D19

D21

D23

D25

D11

D27

D13

D29

D15

D31

Decoder

Multiplexer & Page Data Latch

Output Buffer

MSM531655E

RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM LIMITS

DC CHARACTERISTICS

Operating Temperature

Storage Temperature

Power Supply Voltage

Input Voltage

Output Voltage

Power Dissipation

Parameter

Symbol

Unit

Limits

Conditions

�0.3 to 7

�0.3 to V

+ 0.5

�0.3 to V

+ 0.5

0 to 70

�55 to 150

1.0

�C

Per Package T

opr

= 25�C

to V

opr

stg

Power Supply Voltage

"H" Input Voltage

"L" Input Voltage

Parameter

Symbol

Unit

5.5

Typ.

4.5

Conditions

Min.

Max.

5.0

0.0

2.2

5.0

0.8

0.0

Operating Temperature

Limits

�0.3

�C

opr

"H" Output Voltage

"L" Output Voltage

Parameter

Symbol

Unit

Typ.

2.4

Conditions

Min.

Max.

Power Supply Current
(Operating)

0.4

�A

120

�A

500

�A

Input Leakage Current

Output Leakage Current

Power Supply Current
(Standby)

�A

Limits

= 5V�10%, Ta = 0 to 70�C)

= �400uA

= 2.1mA

�10

CE = V

�0.2V

CE = V

IH MIN

= 0 to V

CE = V

IH MIN

CE = V

IL,

OE = V

IH,

= 100ns

CCS

CCS1

5.5

MSM531655E

Address

OUT

ACC

AC CHARACTERISTICS

Test conditions

Parameter

Conditions

Input Signal Level

Transtion Time

Timing Reference Level

Load Condition

=3.0V, V

=0.0V

tr=tf=5ns
Input Voltage=1.5V
Output Voltage=0.8V&2.0V

CL=100pF+1TTL

Random Access Cycle time

Parameter

Symbol

Unit

Typ.

100

Conditions

Min.

Max.

100

Read Cycle

Random Address Access time

Page Set up time

OE Access time

CE Output Disable time

OE Output Disable time

Output Hold time

Limits

(Ta = 0 to 70�C)

120

ACC

PSET

CHZ

OHZ

Page Access Cycle time

100

Page Access time

CE Access time

PAC

Read Cycle (Note1)

MSM531655E

OUT

CHZ

Page Mode Read Cycle (Note4)

Address
A3 - A17

PSET

OUT

ACC

PAC

Address
A0 - A2

Read Cycle (Note2)

(Note 3)

Note)

1. CE is low level.
2. Address is fixed before or at the same time when CE level falls.
3. t

CHZ

& t

OHZ

indicate the time until floating. They are not determined by the output level.

4. CE is low level and OE is low level.

I/O CAPACITANCE

Input Capacitance

Output Capacitance

Parameter

Symbol

Unit

Typ.

Conditions

Min.

Max.

Rated Value

=0V

OHZ

(Note 3)

Semiconductor

NOTICE

The information contained herein can change without notice owing to product and/or technical im-
provements. Before using the product, please make sure that the information being referred to is up-to-
date.

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 opera-
tion resulting from misuse, neglect, improper installation, repair, alteration or accident, improper han-
dling, or unusual physical or electrical stress including, but not limited to, exposure to parameters be-
yond 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 commer-
cial 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 de-
vices, 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 par-
ticular countries. The purchaser assumes the responsibility of determining the legality of export of these
products and will take appropriate and necessary steps at their own expense for these.

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.

ADDRESSES & SEMICONDUCTOR WEB SITES

OKI Electric Industry Co., Ltd.

OKI Electric Industry Co., Ltd.,
Device Business Group,
10-3, Shibaura, 4-chome,
Minato-ku, Tokyo 108, Japan,
Tel.: +81-(0)3-5445-6327,
Fax.: +81-(0)3-5445-6328,

http://www.oki.co.jp/OKI/DBG/english/index.htm

(NOTE: URL is case sensitive)

OKI Semiconductor Group

OKI Semiconductor Group,
785 North Mary Avenue,
Sunnyvale, CA 94086, U.S.A.,
Tel.: +1-408-720-1900,
Fax.: +1-408-720-1918,

http://www.okisemi.com/

OKI Electric Europe GmbH

OKI Electric Europe GmbH,
Head Office Europe,
Hellersbergstrasse 2,
D-41460 Neuss, Germany,
Tel: +49-2131-15960,
Fax: +49-2131-103539,

http://www.oki-europe.de/

OKI Electronics (Hong Kong) Ltd.

OKI Electronics (Hong Kong) Ltd.,
Suite 1901-1&19, Tower 3,
China Hong Kong City,
33 Canton Road, Tsimshatsui,
Kowloon, Hong Kong,
Tel.: +852-2-736-2336,
Fax.: +852-2-736-2395

OKI Semiconductor (Asia) Pte. Ltd.

OKI Semiconductor (Asia) Pte. Ltd.,
78 Shenton Way 09-01,
Singapore 0207,
Tel.: +65-221-3722,
Fax.: +65-323-5376

OKI Semiconductor (Asia) Pte. Ltd.

OKI Semiconductor (Asia) Pte. Ltd.,
Taipei Branch,
7th Fl. No.260, Tun Hwa North Road,
Taipei, Taiwan, R.O.C.,
Sumitomo-Flysun Building,
Tel.: +886-2-2719-2561,
Fax.: +886-2-2715-2892

http://www.oki.net.tw/

For further information, please contact:

People To People Technology

Электронный компонент: MSM531655E