®
ISSI
IS62C256
32K x 8 LOW POWER CMOS STATIC RAM
FEATURES
DESCRIPTION
The ISSI IS62C256 is a low power, 32,768 word by 8-bit
CMOS static RAM. It is fabricated using ISSI's high-
performance, low power CMOS technology.
• Access time: 45, 70 ns
• Low active power: 200 mW (typical)
• Low standby power
WhenCSisHIGH(deselected),thedeviceassumesastandby
mode at which the power dissipation can be reduced down to
250 µW (typical) at CMOS input levels.
— 250 µW (typical) CMOS standby
— 28 mW (typical) TTL standby
• Fully static operation: no clock or refresh
required
Easy memory expansion is provided by using an active LOW
ChipSelect(CS)inputandanactiveLOWOutputEnable(OE)
input. TheactiveLOWWriteEnable(WE)controlsbothwriting
and reading of the memory.
• TTL compatible inputs and outputs
• Single 5V power supply
The IS62C256 is pin compatible with other 32K x 8 SRAMs in
plastic SOP or TSOP (Type I) package.
FUNCTIONAL BLOCK DIAGRAM
32K X 8
MEMORY ARRAY
A0-A14
DECODER
VCC
GND
I/O
DATA
COLUMN I/O
I/O0-I/O7
CIRCUIT
CS
OE
WE
CONTROL
CIRCUIT
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which
may appear in this publication. © Copyright 1999, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774
SR072-1E
05/12/99
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