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IDT71T024L150PZI

LOW POWER 2V CMOS SRAM 1 MEG (128K x 8-BIT)

Integrated Device Technology 

IDT71T024

LOW POWER 2V CMOS STATIC RAM 1 MEG (128K x 8-BIT)

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

TIMING WAVEFORM OF WRITE CYCLE NO. 1 (WE CONTROLLED TIMING)(1, 2, 5)

ADDRESS

CS1

tWC

tAW

tCW

CS2

WE

DATAOUT

DATAIN

tAS

tWP (7)

tWR (3)

tWHZ (6)

(4)

HIGH IMPEDANCE

tOW (6)

tDW

tDH

DATAIN VALID

tCHZ (6)

(4)

3779 drw 09

TIMING WAVEFORM OF WRITE CYCLE NO. 2 (CS1 AND CS2 CONTROLLED TIMING)(1,2,5)

tWC

ADDRESS

tAW

CS1

CS2

tAS

WE

DATAIN

tCW

tWR (3)

tDW

tDH

DATAIN VALID

3779 drw 10

NOTES:

1. WE or CS1 must be HIGH, or CS2 must be LOW during all address transitions.

2. A write occurs during the overlap of a LOW CS1, HIGH CS2, and a LOW WE.

3. tWR is measured from the earlier of either CS1 or WE going HIGH or CS2 going LOW to the end of the write cycle.

4. During this period, I/O pins are in the output state, and input signals must not be applied.

5. If the CS1 LOW transition or CS2 HIGH transition occurs simultaneously with or after the WE LOW transition, the outputs remain in a high-impedance state.

6. Transition is measured ±200mV from steady state.

7. OE is continuously HIGH. If during a WE controlled write cycle OE is LOW, tWP must be greater than or equal to tWHZ + tDW to allow the I/O drivers to turn

off and data to be placed on the bus for the required tDW. If OE is HIGH during a WE controlled write cycle, this requirement does not apply and the

minimum write pulse is as short as the specified tWP.

7

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