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71V321L55PFGI Datasheet(PDF) 8 Page - Integrated Device Technology

Part # 71V321L55PFGI
Description  HIGH SPEED 3.3V 2K X 8 DUAL-PORT STATIC RAM WITH INTERRUPTS
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

71V321L55PFGI Datasheet(HTML) 8 Page - Integrated Device Technology

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6.42
IDT71V321S/L
High Speed 3.3V 2K x 8 Dual-Port Static RAM with Interrupts
Industrial and Commercial Temperature Ranges
8
Timing Waveform of Write Cycle No. 2, (CE Controlled Timing)(1,5)
Timing Waveform of Write Cycle No. 1, (R/W Controlled Timing)(1,5,8)
NOTES:
1. R/W or CE must be HIGH during all address transitions.
2. A write occurs during the overlap (tEW or tWP) of CE = VIL and R/W= VIL.
3. tWR is measured from the earlier of CE or R/W going HIGH to the end of the write cycle.
4. During this period, the l/O pins are in the output state and input signals must not be applied.
5. If the CE LOW transition occurs simultaneously with or after the R/W LOW transition, the outputs remain in the High-impedance state.
6. Timing depends on which enable signal (CE or R/W) is asserted last.
7. This parameter is determined to be device characterization, but is not production tested. Transition is measured 0mV from steady state with the Output Test
Load (Figure 2).
8. If OE is LOW during a R/W controlled write cycle, the write pulse width must be the larger of tWP or (tWZ + tDW) to allow the I/O drivers to turn off data to be
placed on the bus for the required tDW. If OE is HIGH during a R/W controlled write cycle, this requirement does not apply and the write pulse can be as short
as the specified tWP.
tWC
ADDRESS
OE
CE
R/
W
DATAOUT
DATAIN
tAS
tWR
tOW
tDW
tDH
tAW
tWP(2)
tHZ
(4)
(4)
tWZ
tHZ
3026 drw 08
(6)
(7)
(7)
(3)
(7)
tWC
ADDRESS
CE
R/
W
DATA IN
tAS
tEW
tWR
tDW
tDH
tAW
3026 drw 09
(6)
(2)
(3)


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