Document Number: 001-09880 Rev. *H

Page 6 of 15

Switching Characteristics

Over the Operating Range

Parameter[17]

Description

55 ns

Unit

Min

Max

Read Cycle

Read cycle time

55

–

ns

Address to data valid

–

55

ns

Data hold from address change

6

–

ns

–

55

ns

OE LOW to data valid

–

25

ns

OE LOW to LOW Z[18]

5–

ns

OE HIGH to High Z[18, 19]

–18

ns

[18]

10

–

ns

[18, 19]

–18

ns

0

–

ns

–

55

ns

BLE/BHE LOW to data valid

–

55

ns

BLE/BHE LOW to Low Z [18]

10

–

ns

BLE/BHE HIGH to HIGH Z [18, 19]

–18

ns

Write Cycle[20]

Write cycle time

55

–

ns

40

–

ns

Address setup to write end

40

–

ns

Address hold from write end

0

–

ns

Address setup to write start

0

–

ns

WE pulse width

40

–

ns

BLE/BHE LOW to write end

40

–

ns

Data setup to write end

25

–

ns

Data hold from Write End

0

–

ns

WE LOW to High Z[18, 19]

–20

ns

WE HIGH to Low Z[18]

10

–

ns

Notes

device.

and any of these signals can terminate a write by going INACTIVE. The data input setup and hold timing should be referenced to the edge of the signal that terminates

the write.