W9425G6JH-5 Winbond Electronics, W9425G6JH-5 Datasheet - Page 36

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W9425G6JH-5

Manufacturer Part Number
W9425G6JH-5
Description
IC DDR-400 SDRAM 256MB 66TSSOPII
Manufacturer
Winbond Electronics
Datasheet

Specifications of W9425G6JH-5

Format - Memory
RAM
Memory Type
DDR SDRAM
Memory Size
256M (16Mx16)
Speed
250MHz
Interface
Parallel
Voltage - Supply
2.3 V ~ 2.7 V
Operating Temperature
0°C ~ 70°C
Package / Case
66-TSOPII
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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11.4 Write Timing (Burst Length = 4)
Note: x16 has two DQSs (UDQS for upper byte and LDQS for lower byte). Even if one of the 2 bytes is not used, both UDQS
x4, x8 device
and LDQS must be toggled.
DQ8~15
DQ0~7
UDQS
x16 device
(Data)
LDQS
Input
CMD
DQS
ADD
CLK
CLK
t
IS
t
IS
WRIT
Col
t
t
WPRES
t
t
WPRES
IH
WPRES
t
IH
t
CH
t
DQSS
t
t
DQSS
DQSS
Preamble
t
Preamble
Preamble
WPRE
t
t
t
WPRE
WPRE
CL
t
DS
DA0
DA
t
t
0
DS
DS
t
DA0
DA0
DA
DA
DH
0
0
t
DQSH
t
DSH
t
DSH
t
t
t
t
t
DQSH
DH
DSH
DQSH
DH
DA1
DA
1
DA1
DA1
DA1
DA
t
1
CK
t
DQSL
t
DSS
t
t
t
t
DSS
DQSL
DSS
DQSL
t
DS
DA2
DA
t
t
2
DS
t
DS
DA2
DA2
DH
DA
DA
2
2
t
DQSH
- 36 -
t
DSH
t
t
t
t
t
t
DH
DH
DQSH
DSH
DQSH
DSH
t
DS
DA3
DA
t
t
3
DS
DS
DA3
DA3
t
DA
DA
Postamble
DH
3
3
t
WPST
Postamble
Postamble
t
DSS
t
t
t
t
t
WPST
t
WPST
DH
DSS
DH
DSS
Publication Release Date: May 26, 2010
W9425G6JH
Revision A01

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