參數(shù)資料
型號(hào): MB81V4265S-60L
廠商: Fujitsu Limited
英文描述: CMOS 256K ×16 BIT Hyper Page Mode Dynamic RAM(CMOS 256K ×16 位超級(jí)頁(yè)面存取模式動(dòng)態(tài)RAM)
中文描述: 的CMOS 256K × 16位的超頁(yè)模式動(dòng)態(tài)RAM的CMOS(256K × 16位超級(jí)頁(yè)面存取模式動(dòng)態(tài)內(nèi)存)
文件頁(yè)數(shù): 25/30頁(yè)
文件大?。?/td> 653K
代理商: MB81V4265S-60L
25
MB81V4265S-60/-70/-60L/-70L
LCAS
or
UCAS
Fig. 18 – HIDDEN REFRESH CYCLE
V
IH
V
IL
RAS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
A
0
to A
8
WE
V
IH
V
IL
V
IH
V
IL
DQ
(Output)
OE
“H” or “L”
ROW
ADDRESS
DESCRIPTION
A hidden refresh cycle may be performed while maintaining the latest valid data at the output by extending the active time of LCAS
or UCAS and cycling RAS. The refresh row address is provided by the on-chip refresh address counter. This eliminates the need
for the external row address that is required by DRAMs that do not have CAS-before-RAS refresh capability.
DQ
(Input)
HIGH-Z
t
RC
t
RAS
COLUMN
ADDRESS
t
RAS
t
RC
t
RP
t
OEL
t
RCD
t
RAD
t
RSH
t
CHR
t
RP
t
CRP
t
RAH
t
ASR
t
ASC
t
RAL
t
CAH
t
RCS
t
RRH
t
AA
t
RAC
t
CAC
t
DZC
t
CDD
t
OFF
t
OH
t
OFR
t
OH
VALID DATA OUT
HIGH-Z
t
DZO
t
OEA
t
ON
t
OEZ
t
OED
t
AR
相關(guān)PDF資料
PDF描述
MB81V4265S-70L CMOS 256K ×16 BIT Hyper Page Mode Dynamic RAM(CMOS 256K ×16 位超級(jí)頁(yè)面存取模式動(dòng)態(tài)RAM)
MB81V4265S-70 CMOS 256K ×16 BIT Hyper Page Mode Dynamic RAM(CMOS 256K ×16位超級(jí)頁(yè)面存取模式動(dòng)態(tài)RAM)
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