W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 49

• 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

11.19 2 Bank Interleave Read Operation (CL = 2, BL = 2)
∗ t
11.20 2 Bank Interleave Read Operation (CL = 2, BL = 4)
CK
= 100 MHz
CLK
CLK
CMD
DQ
DQS
CLK
CLK
CMD
DQ
DQS
ACTa/b
READAa/b : Read with Auto Pre.CMD of bank a/b
APa/b
ACTa
ACTa/b
READAa/b : Read with Auto Pre.CMD of bank a/b
APa/b
ACTa
: Auto Pre. of bank a/b
: Bank Act. CMD of bank a/b
t
RRD
: Auto Pre. of bank a/b
: Bank Act. CMD of bank a/b
t
RRD
t
ACTb
RCD(a)
t
ACTb
RCD(a)
t
RAS(a)
t
RAS(a)
READAa
t
RC(a)
t
RC(a)
READAa
t
t
CL(a)
RCD(b)
RCD(b)
- 49 -
Preamble
t
t
RAS(b)
RAS(b)
READAb
CL(a)
APa
APa
Preamble
Q0a
t
RC(b)
t
RC(b)
READAb
t
Q1a
RP(a)
CL(b)
t
RP(a)
Postamble
Q0a
Publication Release Date:Dec. 03, 2008
Q2a
Q1a
ACTa
CL(b)
APb
Q3a
ACTa
APb
Preamble
Q0b
t
t
RP(b)
RRD
Q1b
Q0b
W9425G6EH
t
t
RP(b)
RRD
Postamble
Q2b
Q1b
ACTb
Postamble
Q3b
ACTb
Revision A08