White Electronic Designs
V
CC
= +1.8V ±0.1V
AC Characteristics
Parameter
DQ output access time from CK/CK#
Data-out high-impedance window from CK/CK#
Data-out low-impedance window from CK/CK#
Data-out low-impedance window from CK/CK#
DQ and DM input setup time relative to DQS
Data
DQ and DM input hold time relative to DQS
DQ and DM input setup time relative to DQS
DQ and DM input hold time relative to DQS
DQ and DM input pulse width (for each input)
Data hold skew factor
DQ–DQS hold, DQS to first DQ to go nonvalid, per
access
Data valid output window (DVW)
DQS input high pulse width
Data Strobe
DQS input low pulse width
DQS output access time from CK/CK#
DQS falling edge to CK rising – setup time
DQS falling edge from CK rising – hold time
t
t
t
t
t
W3HG128M64EEU-D4
ADVANCED
AC OPERATING CONDITIONS (continued)
Symbol
t
806
Min
-
-450
t
t
t
665
Min
-
-450
t
t
t
534
Min
-
-500
t
t
t
403
Min
-
-600
t
t
t
Max
340
+450
AC (MAX)
Max
340
+450
AC (MAX)
Max
400
+500
AC (MAX)
Max
450
+600
AC (MAX)
Units
ps
ps
ps
ps
ps
ps
ps
ps
ps
t
Notes
47
43
8, 9, 43
8, 10, 43
8, 10, 43
7, 15,
19
7, 15,
19
7, 15,
19
7, 15,
19
37
47
15, 17, 47
15, 17
37
37
40
37
37
QHS
t
AC
HZ
t
LZ1
LZ
2
AC (MIN) AC (MAX) AC (MIN) AC (MAX) AC (MIN) AC (MAX) AC (MIN) AC (MAX)
t
2*
t
AC
(MIN)
t
AC (MAX)
2*
t
AC
(MIN)
t
AC (MAX)
2*
t
AC
(MIN)
t
AC (MAX)
2*
t
AC
(MIN)
t
AC (MAX)
t
DS
a
300
300
100
175
0.35
340
t
300
300
100
175
0.35
340
t
350
350
100
225
0.35
400
t
400
400
150
275
0.35
450
t
t
DH
a
DS
b
t
t
DH
b
DIPW
t
CK
QHS
t
ps
ps
ns
t
t
QH
HP- QHS
t
t
HP- QHS
t
t
t
HP- QHS
t
t
t
HP- QHS
t
t
t
DVW
QH
QH
QH
QH
- DQSQ
t
- DQSQ
- DQSQ
- DQSQ
DQSH
DQSL
t
t
0.35
0.35
-400
0.2
0.2
+400
0.35
0.35
-400
0.2
0.2
+400
0.35
0.35
-450
0.2
0.2
+450
0.35
0.35
-500
0.2
0.2
+500
CK
CK
t
DQSCK
DSS
DSH
ps
t
t
CK
CK
Note:
• AC specification is based on
MICRON
components. Other DRAM manufactures specification may be different.
March 2006
Rev. 0
7
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
