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VG37648041AT 参数 Datasheet PDF下载

VG37648041AT图片预览
型号: VG37648041AT
PDF下载: 下载PDF文件 查看货源
内容描述: 256M : X4,X8 , X16 CMOS同步动态RAM [256M:x4, x8, x16 CMOS Synchronous Dynamic RAM]
分类和应用:
文件页数/大小: 86 页 / 964 K
品牌: VML [ VANGUARD INTERNATIONAL SEMICONDUCTOR ]
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Preliminary  
VG37648041AT  
256M:x4, x8, x16  
VIS  
CMOS Synchronous Dynamic RAM  
SELF REFRESH MODE  
t
CK  
clock must be stable before  
exiting Self Refresh mode  
t
t
CH  
CL  
CLK#  
CLK  
t
t
t
t
IS  
IS  
IH  
IS  
CKE  
t
t
IS  
IH  
COMMAND  
VALID  
t
NOP  
AR  
NOP  
t
IH  
IS  
VALID  
ADDR  
DQS  
DQ  
DM  
200 cycles  
of CLK**  
t
RP*  
Enter  
Self Refresh  
Mode  
EXIT  
Self Refresh  
Mode  
DONT’ CARE  
UNDEFINED  
*=Device must be in the All banks idle” state prior to entering Self Refresh mode  
**=tRC is required before any command can be applied, and 200 cycles of CLK are required before a READ  
command can be applied.  
The minimum time in Self Refresh mode is tRAS MIN.  
Document : 1G5-0157  
Rev.1  
Page79  
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