HANBit

HMS25632J2

URL: www.hbe.co.kr

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HANBit Electronics Co.,Ltd.

Rev. 1.0 (September / 2002)

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68 67 66 65 64 63 62 61

Vss

DQ9

DQ8

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ10

DQ11

DQ14

DQ13

DQ12

Vcc

Vss

DQ21

Vss

DQ20

DQ19

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DQ17

Vss

DQ30

DQ29

DQ28

DQ27

DQ26

DQ25

DQ24

DQ23

DQ22

Vcc

GENERAL DESCRIPTION

The HMS25632J2 is a high-speed static random access memory (SRAM) module containing 262,144 words organized in a

x32-bit configuration. The module consists of two 256K x 16 SRAMs mounted on a 68-pin, double-sided, FR4-printed circuit

board. The HMS25632J2 uses 31 common input and output lines and has an output enable pin which operates faster than

address access time at read cycle. Also it allows that lower and upper byte access by data byte control (/BS0~/BS3). Output

enable (/OE) and write enable(/WE) can set the memory input and output. Data is written into the SRAM memory when write

enable (/WE) and chip enable (/CE) inputs are both LOW.

Reading is accomplished when /WE remains HIGH and /CE and

output enable (/OE) are LOW. For reliability, this SRAM module is designed as multiple power and ground pin. All module

components may be powered from a single +5V DC power supply and all inputs and outputs are fully TTL-compatible.

FEATURES

w Access times : 10, 12 and 15, 55ns

w Low Power Dissipation

w High-density 1Mbyte design

w High-reliability, high-speed design

w Single + 5V

±0.5V power supply

wEasy memory expansion /CE

and /OE functions

w All inputs and outputs are TTL-compatible

w Industry-standard pinout

w FR4-PCB design

w Low profile 68-pin JLCC

OPTIONS

MARKING

w Timing

10ns access

-10

12ns access

-12

15ns access

-15

w Packages

68-pin JLCC

J

PIN FUNCTION

PIN NAME

PIN FUNCTION

PIN NAME

PIN FUNCTION

A0-A17

Address Inputs

/BS0 ~ /BS3

Byte Controls

DQ0-31

Data Inputs

Vcc

Power(+5.0V)

/WE

Write Enable

Vss

Ground

/CE

Chip Enable

N.C

No Connection

/OE

Output Enable

PIN ASSIGNMENT

JLCC TOP VIEW

SRAM MODULE 1Mbyte (256K x 32-Bit), 5V, 68-Pin JLCC Design

Part No. HMS25632J2