White Electronic Designs
AC FUNCTIONAL CHARACTERISTICS
V
CC
, V
CCQ
= +3.3V ±0.3V
PARAMETER
READ/WRITE command to READ/WRITE command
CKE to clock disable or power-down entry mode
CKE to clock enable or power-down exit setup mode
DQM to input data delay
DQM to data mask during WRITEs
DQMto data high-impedance during READs
WRITE command to input data delay
Data-into ACTIVE command
Data-into PRECHARGE command
Last data-in to burst STOP command
Last data-in to new READ/WRITE command
Lastdata-into PRECHARGE command
LOADMODEREGISTER command to ACTIVE or REFRESH command
Data-out to high-impedance from PRECHARGE command
CL = 3
CL = 2
SYMBOL
t
CCD
t
CKED
t
PED
t
DQD
t
DQM
t
DQZ
t
DWD
t
DAL
t
DPL
t
BDL
t
CDL
t
RDL
t
MRD
t
ROH(3)
t
ROH(2)
7
1
1
1
0
0
2
0
4
2
1
1
2
2
3
2
7.5
1
1
1
0
0
2
0
5
2
1
1
2
2
3
2
WED3DG6466V-D2
10
1
1
1
0
0
2
0
5
2
1
1
2
2
3
2
UNITS
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
NOTES
17
14
14
17
17
17
17
15, 21
16, 21
17
17
16, 21
26
17
17
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
May 2005
Rev. 1
6
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
