71321LA55PFG datasheet(13/17 Pages) IDT

13 / 17 page

6.42

IDT71321SA/LA and IDT71421SA/LA

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

Industrial and Commercial Temperature Ranges

Timing Waveform of BUSY Arbitration Controlled by CE Timing(1)

Timing Waveform of BUSY Arbritration Controlled

by Address Match Timing(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. If tAPS is not satisified, the

BUSY will be asserted on one side or the other, but there is no guarantee on which side BUSY will be asserted (IDT71321 only).

AC Electrical Characteristics Over the

Operating Temperature and Supply Voltage Range(1)

NOTES:

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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