IDT71V416S, IDT71V416L, 3.3V CMOS Static RAM
4 Meg (256K x 16-Bit)
Commercial and Industrial Temperature Ranges
Timing Waveform of Write Cycle No. 2 ( CS Controlled Timing) (1,3)
t WC
ADDRESS
t AW
CS
BHE, BLE
WE
DATA OUT
t AS
t BW
t WP
t CW (2)
t WR
t DW
t DH
DATA IN
DATA IN VALID
3624 drw 09
Timing Waveform of Write Cycle No. 3
( BHE , BLE Controlled Timing) (1,3)
t WC
ADDRESS
t AW
CS
BHE, BLE
t AS
t CW
(2)
t BW
WE
DATA OUT
t WP
t DW
t WR
t DH
DATA IN
DATA IN VALID
3624 drw 10
NOTES:
1. A write occurs during the overlap of a LOW CS , LOW BHE or BLE , and a LOW WE .
2. During this period, I/O pins are in the output state, and input signals must not be applied.
3. If the CS LOW or BHE and BLE LOW transition occurs simultaneously with or after the WE LOW transition, the outputs remain in a high-impedance state.
7
6.42
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