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IDT70121L45JGI Datasheet(PDF) 11 Page - Integrated Device Technology

Part # IDT70121L45JGI
Description  HIGH-SPEED 2K x 9 DUAL-PORT STATIC RAM WITH BUSY & INTERRUPT
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT70121L45JGI Datasheet(HTML) 11 Page - Integrated Device Technology

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IDT70121/IDT70125
High-Speed 2K x 9 Dual-Port Static RAM with Busy & Interrupt
Industrial and Commercial Temperature Ranges
APRIL 05, 2006
tAPS
ADDR 'A'
DATAIN'A'
MATCH
tWC
tWP
R/
W'A'
ADDR'B'
DATAOUT 'B'
MATCH
BUSY'B'
tBDA
tDW
tDH
VALID
VALID
tDDD
(4)
tWDD
tBDD
2654 drw 09
(1)
Timing Waveform of BUSY Arbritration Controlled by CE Timing(1)
Timing Waveform of Write with Port-to-Port Read and BUSY(1,2,3)
Timing Waveform of Write with BUSY(3)
NOTES:
1. tWH must be met for both
BUSY input (slave) and output (master).
2.
BUSY is asserted on port 'B' blocking R/W'B', until BUSY'B' goes HIGH.
3. 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".
NOTES:
1. To ensure that the earlier of the two ports wins. tAPS is ignored for Slave (IDT70125).
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 oppsite from port "A".
2654 drw 10
R/
W"A"
BUSY"B"
tWP
tWB
R/
W"B"
tWH
(1)
(2)
tBDC
ADDR"A and B"
BUSY"B"
CE"A"
tAPS
(2)
tBAC
ADDRESSES MATCH
CE"B"
2654 drw 11
(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
(70121 only).


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