參數(shù)資料
型號(hào): μPD45D128164
廠商: NEC Corp.
英文描述: 128 M-bit Synchronous DRAM with Double Data Rate(128 同步動(dòng)態(tài)RAM)
中文描述: 128 M位同步雙數(shù)據(jù)速率(128同步動(dòng)態(tài)RAM的內(nèi)存)
文件頁(yè)數(shù): 42/80頁(yè)
文件大?。?/td> 637K
代理商: ΜPD45D128164
42
μ
PD45D128442, 45D128842, 45D128164
Preliminary Data Sheet
13.6.4 Synchronous Characteristics Example
Symbol
f
CK
= 125 MHz,
t
CK
= 8 ns
f
CK
= 100 MHz,
t
CK
= 10 ns
f
CK
= 83 MHz,
t
CK
= 12 ns
Unit
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
t
CH
3.6
4.4
4.5
5.5
5.4
6.6
ns
t
CL
3.6
4.4
4.5
5.5
5.4
6.6
ns
t
CKSK
0.2
0.2
0.2
ns
t
AC
0.8
0.8
1
1
1.2
1.2
ns
t
DQSCK
0.8
0.8
1
1
1.2
1.2
ns
t
DQSQ
0.6
0.6
0.8
0.8
0.9
0.9
ns
t
DV
2.4
3
3.6
ns
t
DQSV
2.4
3
3.6
ns
t
RPRE
7.2
8.8
9
11
10.8
13.2
ns
t
RPST
3.2
4.8
4
6
4.8
7.2
ns
t
DS
0.6
0.8
0.9
ns
t
DH
0.6
0.8
0.9
ns
t
DMS
0.6
0.8
0.9
ns
t
DMH
0.6
0.8
0.9
ns
t
WPRES
0
0
0
ns
t
WPREH
2.0
2.5
3.0
ns
t
WPRE
3.2
8.8
4
11
4.8
13.2
ns
t
WPST
3.2
4.8
4
6
4.8
7.2
ns
t
DQSS
6.0
10.0
7.5
12.5
9.0
15.0
ns
t
IS
1.2
1.5
1.8
ns
t
IH
1.2
1.5
1.8
ns
t
TD
0.5
0.5
0.5
ns
t
T
0.5
0.5
0.5
ns
13.6.5 Asynchronous Characteristics
Parameter
Symbol
-C10
-C12
Unit
Note
MIN.
MAX.
MIN.
MAX.
ACT to ACT delay (Same bank),
REF to REF delay
t
RC
70
84
ns
ACT to PRE delay
t
RAS
50
120,000
60
120,000
ns
PRE to ACT delay
t
RP
20
24
ns
ACT to READ/WRIT delay
t
RCD
20
24
ns
ACT to ACT delay (Different bank)
t
RRD
20
24
ns
CLK related with last Din to PRE delay
t
DPL
10
12
ns
CLK related with last Din to ACT/REF delay
(Auto precharge)
t
DAL
30
36
ns
Mode register set cycle time
t
RSC
2
2
CLK
Refresh time
t
REF
64
64
ms
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