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W3HG264M72EERXXXAD7MG Datasheet(PDF) 7 Page - White Electronic Designs Corporation

Part # W3HG264M72EERXXXAD7MG
Description  1GB - 2x64Mx72 DDR2 SDRAM REGISTERED, w/PLL, VLP Mini-DIMM
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Manufacturer  WEDC [White Electronic Designs Corporation]
Direct Link  http://www.whiteedc.com
Logo WEDC - White Electronic Designs Corporation

W3HG264M72EERXXXAD7MG Datasheet(HTML) 7 Page - White Electronic Designs Corporation

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W3HG264M72EER-AD7
December 2005
Rev. 0
ADVANCED
7
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
AC TIMING PARAMETERS
0°C ≤ TCASE < +85°C; VCCQ = + 1.8V ± 0.1V, VCC = +1.8V ± 0.1V
AC CHARACTERISTICS
806
667
534
403
PARAMETER
SYMBOL
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
Notes
Clock cycle time
CL = 6
tCK (6)
TBD
TBD
ps
16, 24
CL = 5
tCK (5)
TBD
TBD
3,000
8,000
ps
16, 24
CL = 4
tCK (4)
TBD
TBD
3,750
8,000
3,750
8,000
5,000
8,000
ps
16, 24
CL = 3
tCK (3)
TBD
TBD
5,000
8,000
5,000
8,000
5,000
8,000
ps
16, 24
CK high-level width
tCH
TBD
TBD
0.45
0.55
0.45
0.55
0.45
0.55
tCK
18
CK low-level width
tCL
TBD
TBD
0.45
0.55
0.45
0.55
0.45
0.55
tCK
18
Half clock period
tHP
TBD
TBD
MIN
(tCH,
tCL)
MIN
(tCH,
tCL)
MIN
(tCH,
tCL)
ps
19
DQ output access time from CK/CK#
tAC
TBD
TBD
-450
+450
-500
+500
-600
+600
ps
Data-out high-impedance window from
CK/CK#
tHZ
TBD
TBD
tAC
(MAX)
tAC
MAX
tAC
MAX
ps
8, 9
Data-out low-impedance window from CK/CK#
tLZ
TBD
TBD
tAC
(MIN)
tAC
(MAX)
tAC
(MIN)
tAC
(MAX)
tAC
(MIN)
tAC
(MAX)
ps
8, 10
DQ and DM input setup time relative to DQS
tDSa
TBD
TBD
100
100
100
ps
7, 15,
21
DQ and DM input hold time relative to DQS
tDHa
TBD
TBD
175
225
275
ps
7, 15,
21
DQ and DM input setup time relative to DQS
tDSb
TBD
TBD
100
100
150
tCK
7, 15,
21
DQ and DM input hold time relative to DQS
tQHb
TBD
TBD
175
225
275
ps
7, 15,
21
DQ…DQS hold, DQS to first DQ to go
nonvalid, per access relative to DQS
tDIPW
TBD
TBD
0.35
0.35
0.35
ps
Data hold skew factor
tQHS
TBD
TBD
340
400
450
DQ–DQS hold, DQS to first DQ to go nonvalid,
per access
tQH
TBD
TBD
tHP-
tQHS
tHP-
tQHS
tHP-
tQHS
15, 17
Data valid output window (DVW)
tDVW
TBD
TBD
tQH-
tDQSQ
tQH-
tDQSQ
tQH-
tDQSQ
15, 17
DQS input high pulse width
tDQSH
TBD
TBD
0.35
0.35
0.35
tCK
DQS input low pulse width
tDQSL
TBD
TBD
0.35
0.35
0.35
tCK
DQS output access time from CK/CK#
tDQSCK
TBD
TBD
-400
+400
-450
+450
-500
+500
ps
DQS falling edge to CK rising– setup time
tDSS
TBD
TBD
0.2
0.2
0.2
tCK
DQS falling edge from CK rising – hold time
tDSH
TBD
TBD
0.2
0.2
0.2
tCK
DQS–DQ skew, DQS to last DQ valid, per
group, per access
tDQSQ
TBD
TBD
240
300
350
ps
15, 17
DQS read preamble
tRPRE
TBD
TBD
0.9
1.1
0.9
1.1
0.9
1.1
tCK
35
NOTE:
• AC specification is based on MICRON components. Other DRAM manufactures specification may be different.


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