IDT7142LA55P datasheet(12/16 Pages) IDT

12 / 16 page

IDT7132SA/LA and IDT 7142SA/LA

High Speed 2K x 8 Dual Port Static RAM

Military, Industrial and Commercial Temperature Ranges

Timing Waveform of Write with BUSY(4)

NOTES:

1. tWH must be met for both BUSY Input (IDT7142, slave) or Output (IDT7132, master).

2. BUSY is asserted on port "B" blocking R/W"B", until BUSY"B" goes HIGH.

3. tWB applies only to the slave version (IDT7142).

4. All timing is the same for the left and right ports. Port 'A' may be either the left or right port. Port "B" is opposite from port "A".

Timing Waveform of Write with Port-to-Port Read and BUSY(2,3,4)

BUSY"B"

2692 drw 12

W"A"

tWP

tWH

(1)

tWB

W"B"

(2)

(3)

tWC

tWP

tDW

tDH

tBDD

tDDD

tBDA

tWDD

ADDR"B"

DATAOUT"B"

DATAIN"A"

ADDR"A"

MATCH

VALID

MATCH

VALID

W"A"

BUSY"B"

tAPS

(1)

2692 drw 11

tBAA

NOTES:

1. To ensure that the earlier of the two ports wins. tAPS is ignored for Slave (IDT7142).

2. CEL = CER = VIL

3. OE = VIL for the reading port.

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

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