71321LA55JGI8 datasheet(13/18 Pages) IDT

13 / 18 page

6.42

IDT71321SA/LA and IDT71421SA/LA

High Speed 2K x 8 Dual-Port Static RAM with Interrupts

Industrial and Commercial Temperature Ranges

T im ing Wa ve for m of BUSY Arbit ra t ion Cont rolle d by CE T im ing(1)

T im ing Wa ve for m of BUSY Arbit ra t ion Cont rolle d

by Addre ss M a t c h T im ing(1)

NOTES:

1. All timing is the same for left and right ports. Port “A” may be either left or right port. Port “B” is the opposite from port “A”.

2. IftAPSisnotsatisfied,the BUSYwillbeassertedononesideortheother,butthereisnoguaranteeonwhichsideBUSY willbeasserted(IDT71321only).

AC Ele c t ric a l Cha ra c t e rist ic s Ove r t he

Ope ra t ing Te m pe ra t ure a nd Supply Volt a ge Ra nge (1)

NOTE:

1. 'X' in part numbers indicates power rating (SA or LA).

tAPS

(2)

ADDR "A"

AND "B"

ADDRESSES MATCH

tBAC

tBDC

CE"B"

CE"A"

BUSY"A"

2691 drw 12

BUSY"B"

ADDRESSES DO NOT MATCH

ADDRESSES MATCH

tAPS

(2)

ADDR"A"

ADDR"B"

2691 drw 13

tBAA

tBDA

tRC or tWC

71321X20

71421X20

Com'l Only

71321X25

71421X25

Com'l

& Ind

Symbol

Parameter

Min.Max.Min.Max.

Unit

INTERRUPT TIMING

tAS

Address Set-up Time

____

tWR

Write Recovery Time

____

tINS

Interrupt Set Time

____

tINR

Interrupt Reset Time

____

2691 tbl 11a

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