參數(shù)資料
型號: μPD42S17405L
廠商: NEC Corp.
英文描述: 16M- bit CMOS dynamic RAMs(16M CMOS 動(dòng)態(tài)RAM)
中文描述: 1,600位CMOS動(dòng)態(tài)存儲(chǔ)器(1,600的CMOS動(dòng)態(tài)內(nèi)存)
文件頁數(shù): 10/36頁
文件大小: 310K
代理商: ΜPD42S17405L
μ
PD42S17405L, 4217405L
10
AC Characteristics
(Recommended Operating Conditions unless otherwise noted)
AC Characteristics Test Conditions
(1) Input timing specification
(2) Output timing specification
V
IH (MIN.)
= 2.0 V
V
IL (MAX.)
= 0.8 V
V
OH(MIN.)
= 2.0 V
V
OL(MAX.)
= 0.8 V
t
T
= 2 ns
t
T
= 2 ns
(3) Output load condition
100 pF
C
L
I/O
1,180
870
V
CC
Common to Read, Write, Read Modify Write Cycle
Parameter
Symbol
t
RAC
= 50 ns
t
RAC
= 60 ns
t
RAC
= 70 ns
Unit
Notes
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
Read / Write cycle time
t
RC
84
104
124
ns
RAS precharge time
t
RP
30
40
50
ns
CAS precharge time
t
CPN
7
10
10
ns
RAS pulse width
t
RAS
50
10,000
60
10,000
70
10,000
ns
1
CAS pulse width
t
CAS
7
10,000
10
10,000
12
10,000
ns
RAS hold time
t
RSH
10
15
20
ns
CAS hold time
t
CSH
38
45
50
ns
RAS to CAS delay time
t
RCD
11
37
14
45
14
52
ns
2
RAS
to column address delay time
t
RAD
9
25
12
30
12
35
ns
2
CAS to RAS precharge time
t
CRP
5
5
5
ns
3
Row address setup time
t
ASR
0
0
0
ns
Row address hold time
t
RAH
7
10
10
ns
Column address setup time
t
ASC
0
0
0
ns
Column address hold time
t
CAH
7
10
12
ns
OE lead time referenced to RAS
t
OES
0
0
0
ns
CAS to data setup time
t
CLZ
0
0
0
ns
OE to data setup time
t
OLZ
0
0
0
ns
OE to data delay time
t
OED
10
13
15
ns
Transition time (rise and fall)
t
T
1
50
1
50
1
50
ns
Refresh time
μ
PD42S17405L
t
REF
128
128
128
ms
4
μ
PD4217405L
32
32
32
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