70T651S15DRG8 datasheet(2/28 Pages) IDT

Part #	70T651S15DRG8

Description	HIGH-SPEED 2.5V 256/128K x 36 ASYNCHRONOUS DUAL-PORT STATIC RAM

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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IDT70T651/9S

High-Speed 2.5V 256/128K x 36 Asynchronous Dual-Port Static RAM

Industrial and Commercial Temperature Ranges

2

Description

The IDT70T651/9 is a high-speed 256/128K x 36 Asynchronous

Dual-Port Static RAM. The IDT70T651/9 is designed to be used as a

stand-alone 9216/4608K-bit Dual-Port RAM or as a combination MAS-

TER/SLAVEDual-PortRAMfor72-bit-or-morewordsystem.Usingthe

IDT MASTER/SLAVE Dual-Port RAM approach in 72-bit or wider

memory system applications results in full-speed, error-free operation

withouttheneedforadditionaldiscretelogic.

This device provides two independent ports with separate control,

address,andI/Opinsthatpermitindependent,asynchronousaccessfor

reads or writes to any location in memory. An automatic power down

feature controlled by the chip enables (either CE0 or CE1) permit the

on-chip circuitry of each port to enter a very low standby power mode.

TheIDT70T651/9hasaRapidWriteModewhichallowsthedesigner

to perform back-to-back write operations without pulsing the R/W input

each cycle. This is especially significant at the 10ns cycle time of the

IDT70T651/9,easingdesignconsiderationsatthesehighperformance

levels.

The70T651/9cansupportanoperatingvoltageofeither3.3Vor2.5V

on one or both ports, controlled by the OPT pins. The power supply for

the core of the device (VDD) is at 2.5V.

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