IDT71256S
IDT71256L
CMOS STATIC RAM
256K (32K x 8-BIT)
Integrated Device Technology, Inc.
FEATURES:
• High-speed address/chip select time
DESCRIPTION:
— Military: 25/30/35/45/55/70/85/100/120/150ns (max.)
— Commercial: 20/25/35/45ns (max.) Low Power only.
• Low-power operation
The IDT71256 is a 262,144-bit high-speed static RAM
organized as 32K x 8. It is fabricated using IDT’s high-
performance, high-reliability CMOS technology.
• Battery Backup operation — 2V data retention
• Produced with advanced high-performance CMOS
technology
• Input and output directly TTL-compatible
• Available in standard 28-pin (300 or 600 mil) ceramic
DIP, 28-pin (600 mil) plastic DIP, 28-pin (300 mil) SOJ
and 32-pin LCC
Address access times as fast as 20ns are available with
power consumption of only 350mW (typ.). The circuit also
offers a reduced power standby mode. When CSgoes HIGH,
the circuit will automatically go to, and remain in, a low-power
standbymodeaslongasCSremainsHIGH. Inthefullstandby
mode, the low-power device consumes less than 15µW,
typically. This capability provides significant system level
power and cooling savings. The low-power (L) version also
offers a battery backup data retention capability where the
circuit typically consumes only 5µW when operating off a 2V
battery.
• Military product compliant to MIL-STD-883, Class B
The lDT71256 is packaged in a 28-pin (300 or 600 mil)
ceramic DIP, a 28-pin 300 mil J-bend SOlC, and a 28-pin (600
mil) plastic DIP, and 32-pin LCC providing high board-level
packing densities.
TheIDT71256militaryRAMismanufacturedincompliance
with the latest revision of MIL-STD-883, Class B, making it
ideally suited to military temperature applications demanding
the highest level of performance and reliability.
FUNCTIONAL BLOCK DIAGRAM
A0
VCC
GND
262,144 BIT
MEMORY ARRAY
ADDRESS
DECODER
A14
I/O 0
I/O CONTROL
INPUT
DATA
CIRCUIT
I/O 7
CS
CONTROL
CIRCUIT
WE
OE
2946 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1996
1996 Integrated Device Technology, Inc.
DSC-2946/7
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