- 您现在的位置：买卖IC网 > Datasheet目录368 > W9425G6EH-5 (Winbond Electronics)IC DDR-400 SDRAM 256MB 66TSSOPII Datasheet资料下载
参数资料
| 型号： | W9425G6EH-5 |
| 厂商： | Winbond Electronics |
| 文件页数： | 11/54页 |
| 文件大小： | 0K |
| 描述： | IC DDR-400 SDRAM 256MB 66TSSOPII |
| 标准包装： | 108 |
| 格式 - 存储器： | RAM |
| 存储器类型： | DDR SDRAM |
| 存储容量： | 256M（16Mx16） |
| 速度： | 250MHz |
| 接口： | 并联 |
| 电源电压： | 2.3 V ~ 2.7 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 66-TSSOP（0.400"，10.16mm 宽） |
| 供应商设备封装： | 66-TSOP II |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页
W9425G6EH
1) READA ≥ t RAS (min) - (BL/2) x t CK
Internal precharge operation begins after BL/2 cycle from Read with Auto-precharge command.
2) t RCD(min) ≤ READA < t RAS(min) - (BL/2) x t CK
Data can be read with shortest latency, but the internal Precharge operation does not begin until
after t RAS (min) has completed.
This command must not be interrupted by any other command.
7.2.8
Mode Register Set Command
( RAS = "L", CAS = "L", WE = "L", BA0 = "L", BA1 = "L", A0 to A12 = Register Data)
The Mode Register Set command programs the values of CAS Latency, Addressing Mode, Burst
Length and DLL reset in the Mode Register. The default values in the Mode Register after power-
up are undefined, therefore this command must be issued during the power-up sequence. Also,
this command can be issued while all banks are in the idle state. Refer to the table for specific
codes.
7.2.9
Extended Mode Register Set Command
( RAS = "L", CAS = "L", WE = "L", BA0 = "H", BA1 = "L", A0 to A12 = Register data)
The Extended Mode Register Set command can be implemented as needed for function
extensions to the standard (SDR-SDRAM). These additional functions include DLL enable/disable,
output drive strength selection. The default value of the extended mode register is not defined;
therefore this command must be issued during the power-up sequence for enabling DLL. Refer to
the table for specific codes.
7.2.10 No-Operation Command
( RAS = "H", CAS = "H", WE = "H")
The No-Operation command simply performs no operation (same command as Device Deselect).
7.2.11 Burst Read Stop Command
( RAS = "H", CAS = "H", WE = "L")
The Burst stop command is used to stop the burst operation. This command is only valid during a
Burst Read operation.
7.2.12 Device Deselect Command
( CS = "H")
The Device Deselect command disables the command decoder so that the RAS , CAS ,
WE and Address inputs are ignored. This command is similar to the No-Operation command.
7.2.13 Auto Refresh Command
( RAS = "L", CAS = "L", WE = "H", CKE = "H", BA0, BA1, A0 to A12 = Don’t Care)
AUTO REFRESH is used during normal operation of the DDR SDRAM and is analogous to CAS–
BEFORE–RAS (CBR) refresh in previous DRAM types. This command is non persistent, so it
must be issued each time a refresh is required.
The refresh addressing is generated by the internal refresh controller. This makes the address
bits ”Don’t Care” during an AUTO REFRESH command. The DDR SDRAM requires AUTO
Publication Release Date:Dec. 03, 2008
- 11 -
Revision A08
相关PDF资料 |
PDF描述 |
|---|---|
| W9425G6JH-5I | IC DDR SDRAM 256MBIT 66TSOPII |
| W947D2HBJX5E | IC LPDDR SDRAM 128MBIT 90VFBGA |
| W948D2FBJX5E | IC LPDDR SDRAM 256MBIT 90VFBGA |
| W949D2CBJX5E | IC LPDDR SDRAM 512MBIT 90VFBGA |
| W971GG6JB25I | IC DDR2 SDRAM 1GBIT 84WBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W9425G6EH-5I | 制造商:Winbond Electronics Corp 功能描述: |
| W9425G6JB-5 | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR SDRAM 256M-Bit 16Mx16 2.5V 60-Pin TFBGA 制造商:Winbond Electronics 功能描述:IC MEMORY 制造商:Winbond Electronics Corp 功能描述:IC MEMORY 制造商:Winbond 功能描述:16MX16,256Mb DDRI DRAM ,200MHZ, BGA |
| W9425G6JB-5 TR | 制造商:Winbond Electronics Corp 功能描述:256M DDR SDRAM X16, 200MHZ |
| W9425G6JB-5I | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR SDRAM 256M-Bit 16Mx16 2.5V 制造商:Winbond Electronics 功能描述:IC MEMORY 制造商:Winbond Electronics Corp 功能描述:IC MEMORY |
| W9425G6JB-5I TR | 制造商:Winbond Electronics Corp 功能描述:256M DDR SDRAM X16, 200MHZ, IN |
发布紧急采购，3分钟左右您将得到回复。