IDT71256S85DB Integrated Device Technology, Inc., IDT71256S85DB Datasheet

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IDT71256S85DB

Manufacturer Part Number
IDT71256S85DB
Description
CMOS static RAM 256K (32K x 8-bit)
Manufacturer
Integrated Device Technology, Inc.
Datasheet

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IDT71256S85DB
Manufacturer:
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Quantity:
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FEATURES:
• High-speed address/chip select time
• Low-power operation
• Battery Backup operation — 2V data retention
• Produced with advanced high-performance CMOS
• Input and output directly TTL-compatible
• Available in standard 28-pin (300 or 600 mil) ceramic
• Military product compliant to MIL-STD-883, Class B
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1996 Integrated Device Technology, Inc.
— Military: 25/30/35/45/55/70/85/100/120/150ns (max.)
— Commercial: 20/25/35/45ns (max.) Low Power only.
technology
DIP, 28-pin (600 mil) plastic DIP, 28-pin (300 mil) SOJ
and 32-pin LCC
Integrated Device Technology, Inc.
I/O
I/O
A
A
0
14
0
7
CS
OE
WE
CONTROL
CIRCUIT
DECODER
ADDRESS
CIRCUIT
INPUT
DATA
CMOS STATIC RAM
256K (32K x 8-BIT)
7.2
DESCRIPTION:
organized as 32K x 8. It is fabricated using IDT’s high-
performance, high-reliability CMOS technology.
power consumption of only 350mW (typ.). The circuit also
offers a reduced power standby mode. When
the circuit will automatically go to, and remain in, a low-power
standby mode as long as
mode, the low-power device consumes less than 15 W,
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 5 W when operating off a 2V
battery.
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.
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.
The IDT71256 is a 262,144-bit high-speed static RAM
Address access times as fast as 20ns are available with
The lDT71256 is packaged in a 28-pin (300 or 600 mil)
The IDT71256 military RAM is manufactured in compliance
MEMORY ARRAY
I/O CONTROL
262,144 BIT
CS
remains HIGH. In the full standby
V
GND
IDT71256S
IDT71256L
AUGUST 1996
CS
CC
goes HIGH,
2946 drw 01
DSC-2946/7
1

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IDT71256S85DB Summary of contents

Page 1

... I CONTROL CIRCUIT WE The IDT logo is a registered trademark of Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1996 Integrated Device Technology, Inc. CMOS STATIC RAM 256K (32K x 8-BIT) DESCRIPTION: The IDT71256 is a 262,144-bit high-speed static RAM organized as 32K fabricated using IDT’s high- performance, high-reliability CMOS technology ...

Page 2

IDT71256 S/L CMOS STATIC RAM 256K (32K x 8-BIT) PIN CONFIGURATIONS D28 P28 P28 D28-1 A ...

Page 3

IDT71256S/L CMOS STATIC RAM 256K (32K x 8-BIT) RECOMMENDED OPERATING TEMPERATURE AND SUPPLY VOLTAGE Grade Temperature Military – +125 C Commercial + ELECTRICAL CHARACTERISTICS (V = 5.0V 10 0.2V ...

Page 4

IDT71256 S/L CMOS STATIC RAM 256K (32K x 8-BIT) AC TEST CONDITIONS Input Pulse Levels Input Rise/Fall Times Input Timing Reference Levels Output Reference Levels AC Test Load 5V 480 DATA OUT 255 Figure 1. AC Test Load DC ELECTRICAL ...

Page 5

IDT71256S/L CMOS STATIC RAM 256K (32K x 8-BIT) LOW V DATA RETENTION WAVEFORM ELECTRICAL CHARACTERISTICS Symbol Parameter Read Cycle t Read Cycle Time RC t Address Access Time AA t Chip Select Access Time ...

Page 6

IDT71256 S/L CMOS STATIC RAM 256K (32K x 8-BIT) AC ELECTRICAL CHARACTERISTICS Symbol Parameter Read Cycle t Read Cycle Time RC t Address Access Time AA t Chip Select Access Time ACS (2) t Chip Deselect to Output in Low-Z ...

Page 7

IDT71256S/L CMOS STATIC RAM 256K (32K x 8-BIT) TIMING WAVEFORM OF READ CYCLE NO. 1 ADDRESS OE CS DATA OUT TIMING WAVEFORM OF READ CYCLE NO. 2 ADDRESS DATA OUT TIMING WAVEFORM OF READ CYCLE NO DATA OUT ...

Page 8

IDT71256 S/L CMOS STATIC RAM 256K (32K x 8-BIT) TIMING WAVEFORM OF WRITE CYCLE NO ADDRESS DATA OUT DATA IN TIMING WAVEFORM OF WRITE CYCLE NO ADDRESS ...

Page 9

IDT71256S/L CMOS STATIC RAM 256K (32K x 8-BIT) ORDERING INFORMATION IDT 71256 X XXX Device Power Speed Type MILITARY AND COMMERCIAL TEMPERATURE RANGES XXX X Package Process/ Temperature Range Blank ...

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