參數(shù)資料
型號: μPD45128441
廠商: NEC Corp.
英文描述: 128M-bit Synchronous DRAM(128M 同步DRAM)
中文描述: 128兆位同步DRAM(128M的同步DRAM)的
文件頁數(shù): 38/84頁
文件大小: 693K
代理商: ΜPD45128441
Preliminary Data Sheet
38
μ
PD45128441, 45128841, 45128163
Asynchronous Characteristics
Parameter
Symbol
-80
-10
-10B
Unit
Note
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
ACT to REF/ACT command period (operation)
t
RC
70
70
90
ns
REF to REF/ACT command period (refresh)
t
RC1
70
78
90
ns
ACT to PRE command period
t
RAS
48
120,000
50
120,000
60
120,000
ns
PRE to ACT command period
t
RP
20
20
30
ns
Delay time ACT to READ/WRITE command
t
RCD
20
20
30
ns
ACT (one) to ACT (another) command period
t
RRD
16
20
20
ns
Data-in to PRE command period
t
DPL
8
10
10
ns
Data-in to ACT (REF) command
period (Auto precharge)
/CAS latency = 3
t
DAL3
1CLK
+20
1CLK
+20
1CLK
+30
ns
/CAS latency = 2
t
DAL2
1CLK
+20
1CLK
+20
1CLK
+30
ns
Mode register set cycle time
t
RSC
2
2
2
CLK
Transition time
t
T
0.5
30
1
30
1
30
ns
Refresh time (4,096 refresh cycles)
t
REF
64
64
64
ms
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