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JUNE 1999

DSC-2720/9

IDT7134SA/LA

HIGH-SPEED

4K x 8 DUAL-PORT

STATIC SRAM

Features

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High-speed access

– Military: 25/35/45/55/70ns (max.)

– Industrial: 55ns (max.)

– Commercial: 20/25/35/45/55/70ns (max.)

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Low-power operation

– IDT7134SA

Active: 700mW (typ.)

Standby: 5mW (typ.)

– IDT7134LA

Active: 700mW (typ.)

Standby: 1mW (typ.)

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Fully asynchronous operation from either port

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Battery backup operation—2V data retention

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TTL-compatible; single 5V (±10%) power supply

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Available in 48-pin DIP, LCC, Flatpack and 52-pin PLCC

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Military product compliant to MIL-PRF-38535 QML

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Industrial temperature range (–40°C to +85°C) is available for

selected speeds

Functional Block Diagram

COLUMN

I/O

COLUMN

I/O

MEMORY

ARRAY

LEFT SIDE

ADDRESS

DECODE

LOGIC

RIGHT SIDE

ADDRESS

DECODE

LOGIC

R/

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R/

Description

The IDT7134 is a high-speed 4K x 8 Dual-Port Static RAM

designedtobeusedinsystemswhereon-chiphardwareportarbitration

is not needed. This part lends itself to those systems which cannot

tolerate wait states or are designed to be able to externally arbitrate or

withstand contention when both sides simultaneously access the

same Dual-Port RAM location.

TheIDT7134providestwoindependentportswithseparatecontrol,

address, and I/O pins that permit independent, asynchronous access

forreadsorwritestoanylocationinmemory.Itistheuser’sresponsibility

to ensure data integrity when simultaneously accessing the same

memory location from both ports. An automatic power down feature,

controlled by CE, permits the on-chip circuitry of each port to enter a

very low standby power mode.

FabricatedusingIDT’sCMOShigh-performancetechnology,these

Dual-Port typically operate on only 700mW of power. Low-power (LA)

versions offer battery backup data retention capability, with each port

typically consuming 200µW from a 2V battery.

The IDT7134 is packaged on either a sidebraze or plastic 48-pin

DIP, 48-pin LCC, 52-pin PLCC and 48-pin Flatpack. Military grade

product is manufactured in compliance with the latest revision of MIL-

PRF-38535 QML, making it ideally suited to military temperature

applicationsdemandingthehighestlevelofperformanceandreliability.