P3C1256
AC CHARACTERISTICS—WRITE CYCLE
(Over Recommended Operating Temperature & Supply Voltage)
-12
-15
-20
-25
Unit
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Min
Max
tWC
tCW
Write Cycle Time
12
15
20
25
ns
ns
Chip Enable Time to
End of Write
10
10
0
12
12
0
15
18
18
0
tAW
tAS
Address Valid to
End of Write
ns
ns
15
0
Address Set-up
Time
tWP
9
0
11
0
15
0
18
0
Write Pulse Width
Address Hold Time
ns
ns
tAH
Data Valid to End of
Write
tDW
ns
ns
ns
8
0
10
0
12
0
15
0
tDH
tWZ
Data Hold Time
Write Enable to
Output in High Z
7
8
10
11
Output Active from
End of Write
tOW
3
3
3
3
ns
TIMING WAVEFORM OF WRITE CYCLE NO. 1 (WE CONTROLLED)(10,11)
Notes:
10. CE and WE must be LOW for WRITE cycle.
in a high impedance state
11. OE is LOW for this WRITE cycle to show tWZ and tOW
12. If CE goes HIGH simultaneously with WE HIGH, the output remains
.
13. Write Cycle Time is measured from the last valid address to the first
transitioning address.
Document # SRAM122 REV B
Page 5 of 10
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