W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 43

• Manufacturer Part Number: W9425G6EH-5
• Description: IC DDR-400 SDRAM 256MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9425G6EH-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

11.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) t
Notes: CL2 shown; same command operation timing with CL = 2.5, CL=3.
RCD/RAP(min)
BL=2
BL=4
BL=8
In this case, the internal precharge operation does not begin until after t
The Read with Auto-precharge command cannot be interrupted by any other command.
AP
CMD
CMD
DQS
CMD
DQS
CLK
CLK
DQ
DQ
DQS
DQ
Represents the start of internal precharging.
≤ t
ACT
ACT
ACT
RCD
(READA) < t
t
t
t
t
t
t
RCD
RCD
RCD
RAP
RAP
RAP
READA
READA
READA
RAS (min)
t
RAS
– (BL/2) × t
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Q0
Q0
Q0
Q1
Q1
Q1
CK
Q2
Q2
RAS
Q3
Q3
AP
AP
AP
Publication Release Date:Dec. 03, 2008
(min) has command.
Q4
Q5
t
RP
Q6
W9425G6EH
Q7
ACT
ACT
ACT
Revision A08