W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 51
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W9425G6EH-5
Manufacturer Part Number
W9425G6EH-5
Description
IC DDR-400 SDRAM 256MB 66TSSOPII
Manufacturer
Winbond Electronics
Datasheet
1.W9425G6EH-5.pdf
(54 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W9425G6EH-5
Manufacturer:
WINBOND
Quantity:
1 728
Part Number:
W9425G6EH-5
Manufacturer:
WINBOND/华邦
Quantity:
20 000
11.23 Auto Refresh Cycle
Note: CKE has to be kept “High” level for Auto-Refresh cycle.
11.24 Precharged/Active Power Down Mode Entry and Exit Timing
Note:
1. If power down occurs when all banks are idle, this mode is referred to as precharge power down.
2. If power down occurs when there is a row active in any bank, this mode is referred to as active power down.
11.25 Input Clock Frequency Change during Precharge Power Down Mode Timing
CLK
CLK
CMD
CMD
CLK
CLK
CKE
CLK
CLK
CMD
CKE
PREA
t
RP
Precharge/Activate
NOP
Note 1,2
CMD
NOP
Minmum 2 clocks
required before
changing frequency
NOP
t
RP
t
IH
NOP
t
IS
Entry
Frequency Change
Occurs here
t
CK
AREF
Stable new clock
before power down exit
- 51 -
NOP
t
RFC
t
IH
t
NOP
IS
AREF
t
IS
NOP
Exit
Publication Release Date:Dec. 03, 2008
RESET
DLL
200 clocks
CMD
NOP
NOP
t
RFC
W9425G6EH
NOP
NOP
CMD
CMD
Revision A08