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IDT6178S

CMOS StaticRAM 16K (4K x 4-BIT) CACHE-TAG RAM

MILITARY AND COMMERCIAL TEMPERATURE RANGE

Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES

MAY 1994

©1994 Integrated Device Technology, Inc.

DSC-1059/2

CMOS StaticRAM

16K (4K x 4-BIT)

CACHE-TAG RAM

IDT6178S

FEATURES:

• High-speed Address to MATCH Valid time

–

Military: 12/15/20/25ns

–

Commercial: 10/12/15/20/25ns (max.)

• High-speed Address Access time

–

Military: 12/15/20/25ns

–

Commercial: 10/12/15/20/25ns (max.)

• Low-power consumption

–

IDT6178S

Active: 300mW (typ.)

• Produced with advanced CMOS high-performance

technology

• Input and output TTL-compatible

• Standard 22-pin Plastic or Ceramic DIP, 24-pin SOJ

• Military product 100% compliant to MIL-STD-883,

Class B

DESCRIPTION:

The IDT6178 is a high-speed cache address comparator

sub-system consisting of a 16,384-bit StaticRAM organized

as 4K x 4. Cycle Time and Address to MATCH Valid are equal.

The IDT6178 features an onboard 4-bit comparator that

compares RAM contents and current input data. The result is

an active HIGH on the MATCH pin. The MATCH pins of

several IDT6178s can be handed together to provide enabling

or acknowledging signals to the data cache or processor.

The IDT6178 is fabricated using IDT’s high-performance,

high-reliability CMOS technology. Address to MATCH and

Data to MATCH times are as fast as 10ns.

All inputs and outputs of the IDT6178 are TTL-compatible

and the device operates from a single 5V supply.

The IDT6178 is packaged in either a 22-pin, 300-mil Plastic

or Ceramic DIP package or 24-pin SOJ. Military grade product

is manufactured in compliance with latest revision of MIL-

STD-883, Class B, making it ideally suited to military tempera-

ture applications demanding the highest level of performance

and reliability.

FUNCTIONAL BLOCK DIAGRAM

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

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2953 drw 01

ADDRESS

DECODE

WE

OE

CLR

CONTROL

16,384-BIT

MEMORY

ARRAY

CONTROL I/O

COMPARATOR

CLEAR

MEMORY

ARRAY

4

4

4

4

MATCH

GND

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