參數(shù)資料
型號(hào): MC-458DA726
廠商: NEC Corp.
英文描述: 8M-Word By72-BIT Dynamic RAM Module(8M×72位動(dòng)態(tài)RAM模塊)
中文描述: 800萬字By72位動(dòng)態(tài)內(nèi)存模塊(8米× 72位動(dòng)態(tài)內(nèi)存模塊)
文件頁數(shù): 10/16頁
文件大小: 158K
代理商: MC-458DA726
Data Sheet M13202EJ3V0DS00
10
MC-458DA726
Asynchronous Characteristics (Registered Mode)
Parameter
Symbol
-A80
-A10
Unit
Note
MIN.
MAX.
MIN.
MAX.
REF to REF/ACT command period
t
RC
70
70
ns
ACT to PRE command period
t
RAS
48
120,000
50
120,000
ns
PRE to ACT command period
t
RP
20
20
ns
Delay time ACT to READ/WRITE command
t
RCD
20
20
ns
ACT(0) to ACT(1) command period
t
RRD
16
20
ns
Data-in to PRE command period
t
DPL
1CLK+8
1CLK+10
ns
Data-in to ACT(REF) command period /CAS latency = 3
t
DAL3
20
20
ns
(Auto precharge)
/CAS latency = 2
t
DAL2
20
20
ns
Mode register set cycle time
t
RSC
2
2
CLK
Transition time
t
T
0.5
30
1
30
ns
Refresh time (4,096 refresh cycles)
t
REF
64
64
ms
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