W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 42

• 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

11.8 Auto-precharge Timing (Read Cycle, CL = 2)
1) t
Notes: CL=2 shown; same command operation timing with CL = 2,5 and CL=3
BL=2
BL=4
BL=8
RCD
CMD
DQS
CMD
DQS
CMD
DQS
CLK
CLK
DQ
DQ
In this case, the internal precharge operation begin after BL/2 cycle from READA command.
The Read with Auto-precharge command cannot be interrupted by any other command.
DQ
(READA) ≥ t
AP
Represents the start of internal precharging.
ACT
ACT
ACT
RAS (MIN)
– (BL/2) × t
READA
CK
t
RAS
READA
- 42 -
Q0
Q1
READA
Q2
Q3
Publication Release Date:Dec. 03, 2008
AP
AP
AP
Q0
Q4
Q1
Q5
tRP
Q0
Q2
Q6
W9425G6EH
Q1
Q3
Q7
ACT
ACT
ACT
Revision A08