MCM4464 SERIES

6

MOTOROLA FAST SRAM

–12

–15

–17

Parameter

Symbol

Min

Max

Min

Max

Min

Max

Unit

Notes

Address Setup Time

tAVWL

5

—

5

—

5

—

ns

A0 Setup Time

tA0VWL

0

—

0

—

0

—

ns

Address Valid to End of Write

tAVWH

12

—

15

—

17

—

ns

A0 Valid to End of Write

tA0VWH

10

—

12

—

14

—

ns

Write Pulse Width

tWLWH

tWLEH

7

—

10

—

12

—

ns

Data Valid to End of Write

tDVWH

6

—

7

—

8

—

ns

Data Hold Time

tWHDX

0

—

0

—

0

—

ns

Write Low to Data High–Z

tWLQZ

0

4

0

5

0

6

ns

3, 4

Write High to Output Active

tWHQX

3

—

3

—

3

—

ns

3, 4

Write Recovery Time

tWHAX

0

—

0

—

0

—

ns

Write Recovery Time – A0

tWHA0X

0

—

0

—

0

—

ns

NOTES:

1. A write occurs during the overlap of DCS or TCS low and WE low.

2. Enable timings are the same for both DCS and TCS.

3. Transition is measured 200 mV from steady–state voltage with load of Figure 1B.

4. This parameter is sampled and not 100% tested.

WRITE CYCLE 1

tA0VWL

DATA VALID

tAVWH

tWHDX

tWLQZ

tWHQX

HIGH–Z

A1 – A15

WE (WRITE ENABLE)

DCS/TCS

(DATA/TAG ENABLE)

Q (DATA OUT)

D (DATA IN)

tWLEH

tWHAX

tAVWL

A0

tWLWH

tDVWH

tWHA0X

tA0VWH

HIGH–Z