P3C1256

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Document # SRAM122 REV B

AC CHARACTERISTICS—WRITE CYCLE

(Over Recommended Operating Temperature & Supply Voltage)

Symbol

Parameter

Min

Unit

t

WC

ns

t

CW

Chip Enable Time to

End of Write

t

AW

Address Valid to

End of Write

t

AS

Address Set-up

Time

ns

t

WP

Write Pulse Width

ns

t

AH

Address Hold Time

Data Valid to End of

Write

Data Hold Time

Write Enable to

Output in High Z

Output Active from

End of Write

Write Cycle Time

0

9

-12

ns

ns

-25

-20

-15

Max

Min

Max

25

0

18

Min

20

0

15

Max

Min

Max

15

0

11

12

ns

t

DW

ns

t

DH

00

0

0

ns

t

WZ

78

10

11

ns

t

OW

33

3

3

ns

10

10

0

8

12

15

18

12

15

18

0

10

0

12

0

15

Notes:

10. CE and WE must be LOW for WRITE cycle.

11. OE is LOW for this WRITE cycle to show t

12. If CE goes HIGH simultaneously with WE HIGH, the output remains

in a high impedance state

13. Write Cycle Time is measured from the last valid address to the first

transitioning address.

TIMING WAVEFORM OF WRITE CYCLE NO. 1 (WE

WE

WE

WE