6.42

IDT7052S/L

High-Speed 2K x 8 FourPort™ Static RAM

Military, Industrial and Commercial Temperature Ranges

10

Functional Description

The IDT7052 provides four ports with separate control, address, and

I/Opinsthatpermitindependentaccessforreadsorwritestoanylocation

in memory. These devices have an automatic power down feature

controlled by CE. The CE controls on-chip power down circuitry that

permitstherespectiveporttogointostandbymodewhennotselected(CE

permitted.EachporthasitsownOutputEnablecontrol(OE).Intheread

mode, the port’s OE turns on the output drivers when set LOW. READ/

WRITEconditionsareillustratedinthetablebelow.

Timing Waveform of Write with BUSY Input

NOTE:

NOTES:

3. For valid write operation, no more than one port can write to the same address

location at the same time.

NOTES:

3. All timing is the same for left and right ports. Port "A" may be either of the four ports and Port "B" is any other port.

2674 drw 11

MATCH

R/

VALID

MATCH

VALID

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R/

R/

(1)

,

R/W

CE

OE

Function

X

H

X

Z

Port Deselected: Power-Down

XH

X

Z

LL

X

HL

L

Data in memory output on port

XX

H

Z

Outputs Disabled

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