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參數(shù)資料
| 型號(hào)： | 74F189 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 64-Bit Random Access Memory with TRI-STATE Outputs(帶三態(tài)輸出的64位RAM) |
| 中文描述： | 64位隨機(jī)存取存儲(chǔ)器具有三態(tài)輸出（帶三態(tài)輸出的64位內(nèi)存） |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 166K |
| 代理商： | 74F189 |
AC Electrical Characteristics
74F
54F
74F
T
A
e a
25
§
C
V
CC
e a
5.0V
C
L
e
50 pF
*
T
A
, V
CC
e
Mil
C
L
e
50 pF
T
A
, V
CC
e
Com
C
L
e
50 pF
Symbol
Parameter
Units
Min
Typ
Max
Min
Max
Min
Max
t
PLH
t
PHL
Access Time, HIGH or LOW
A
n
to O
n
10.0
8.0
18.5
13.5
26.0
19.0
9.0
8.0
32.0
23.0
10.0
8.0
27.0
20.0
ns
t
PZH
t
PZL
Access Time, HIGH or LOW
CS to O
n
3.5
5.0
6.0
9.0
8.5
13.0
3.5
5.0
10.5
15.0
3.5
5.0
9.5
14.0
ns
t
PHZ
t
PLZ
Disable Time, HIGH or LOW
CS to O
n
2.0
3.0
4.0
5.5
6.0
8.0
2.0
2.5
8.0
10.0
2.0
3.0
7.0
9.0
ns
t
PZH
t
PZL
Write Recovery Time,
HIGH or LOW WE to O
n
6.5
6.5
15.0
11.0
28.0
15.5
6.5
6.5
37.5
17.5
6.5
6.5
29.0
16.5
ns
t
PHZ
t
PLZ
Disable Time, HIGH or LOW
WE to O
n
4.0
5.0
7.0
9.0
10.0
13.0
3.5
5.0
12.0
15.0
4.0
5.0
11.0
14.0
ns
AC Operating Requirements
74F
54F
74F
Symbol
Parameter
T
A
e a
25
§
C
V
CC
e a
5.0V
*
T
A
, V
CC
e
Mil
T
A
, V
CC
e
Com
Units
Min
Max
Min
Max
Min
Max
t
s
(H)
t
s
(L)
Setup Time, HIGH or LOW
A
n
to WE
0
0
0
0
0
0
t
h
(H)
t
h
(L)
Hold Time, HIGH or LOW
A
n
to WE
2.0
2.0
2.0
2.0
2.0
2.0
ns
t
s
(H)
t
s
(L)
Setup Time, HIGH or LOW
D
n
to WE
10.0
10.0
11.0
11.0
10.0
10.0
t
h
(H)
t
h
(L)
Hold Time, HIGH or LOW
D
n
to WE
0
0
2.0
2.0
0
0
ns
t
s
(L)
Setup Time, LOW
CS to WE
0
0
0
t
h
(L)
Hold Time, LOW
CS to WE
6.0
7.5
6.0
ns
t
w
(L)
*
T
A
e b
55
§
C to
a
125
§
C
WE Pulse Width, LOW
6.0
15.0
6.0
ns
4
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 74F189A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:64-bit TTL bipolar RAM, inverting 3-State |
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| 74F189SCX | 功能描述:RAM其它 64-Bit Ran Acces Mem RoHS:否 制造商:Freescale Semiconductor 封裝:Tray |
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