Document Number: 001-84771 Rev. *I

Page 9 of 19

Switching Characteristics

Parameter [18, 19]

Description

45 ns

55 ns

Unit

Min

Max

Min

Max

Read Cycle

Read cycle time

45.0

–

55.0

–

ns

Address to data valid / Address to ERR valid

–

45.0

–

55.0

ns

Data hold from address change / ERR hold from

address change

10.0

–

10.0

–

ns

valid

–

45.0

–

55.0

ns

OE LOW to data valid / OE LOW to ERR valid

–

22.0

–

25.0

ns

OE LOW to Low Z [19, 20]

5.0

–

5.0

–

ns

OE HIGH to High Z [19, 20, 21]

–

18.0

–

18.0

ns

[19, 20]

10.0

–

10.0

–

ns

[19, 20, 21]

–

18.0

–

18.0

ns

[22]

0

–

0

–

ns

[22]

–

45.0

–

55.0

ns

Write Cycle[23, 24]

Write cycle time

45.0

–

55.0

–

ns

35.0

–

40.0

–

ns

Address setup to write end

35.0

–

40.0

–

ns

Address hold from write end

0

–

0

–

ns

Address setup to write start

0

–

0

–

ns

WE pulse width

35.0

–

40.0

–

ns

Data setup to write end

25.0

–

25.0

–

ns

Data hold from write end

0

–

0

–

ns

WE LOW to High Z [19, 21, 20]

–

18.0

–

20.0

ns

WE HIGH to Low Z [19, 20]

10.0

–

10.0

–

ns

Notes

otherwise.

20. Tested initially and after any design or process changes that may affect these parameters.

22. These parameters are guaranteed by design and are not tested.

signals can terminate a write by going INACTIVE. The data input setup and hold timing must refer to the edge of the signal that terminates the write.