W3DG7233V-D2

6

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

February 2005

Rev. 3

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

PRELIMINARY

AC FUNCTIONAL CHARACTERISTICS

PARAMETER

SYMBOL

7

7.5

10

UNITS

NOTES

READ/WRITE command to READ/WRITE command

111

17

CKE to clock disable or power-down entry mode

111

14

CKE to clock enable or power-down exit setup mode

111

14

DQM to input data delay

000

17

DQM to data mask during WRITEs

000

17

DQMto data high-impedance during READs

222

17

WRITE command to input data delay

000

17

Data-into ACTIVE command

455

15, 21

Data-into PRECHARGE command

222

16, 21

Last data-in to burst STOP command

111

17

Last data-in to new READ/WRITE command

111

17

Lastdata-into PRECHARGE command

222

16, 21

LOADMODEREGISTER command to ACTIVE or REFRESH command

222

26

Data-out to high-impedance from PRECHARGE command

CL = 3

333

17

CL = 2

222

17