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參數(shù)資料
| 型號： | HD74HC4538 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Dual Precision Retriggerable/Resettable Monostable Multivibrators |
| 中文描述： | 雙精密Retriggerable /復(fù)式單穩(wěn)態(tài)多頻振蕩器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 81K |
| 代理商： | HD74HC4538 |
HD74HC4538
6
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
V
CC
(V)
2.0
Min Typ Max Min
Max
Unit
Test Conditions
Propagation delay t
PLH
time
—
—
235 —
295
ns
A or B to Q
4.5
—
22
47
—
59
6.0
—
—
40
—
50
t
PHL
2.0
—
—
260 —
325
ns
A or B to
Q
4.5
—
23
52
—
65
6.0
—
—
44
—
55
t
PHL
2.0
—
—
235 —
295
ns
C
D
to Q
4.5
—
17
47
—
59
6.0
—
—
40
—
50
t
PLH
2.0
—
—
235 —
295
ns
C
D
to
Q
4.5
—
—
47
—
59
6.0
—
—
40
—
50
Pulse width
t
w
2.0
80
—
—
100
—
ns
A, B, C
D
4.5
16
—
—
20
—
6.0
14
—
—
17
—
Output pulse width t
WQ
3.0
—
150 —
—
—
ns
R
X
= 1 k
, C
X
= 12 pF
5.0
—
100 —
—
—
3.0
—
—
—
—
—
μ
s
R
X
= 10 k
, C
X
= 100 pF
5.0
—
1.3
—
—
—
3.0
—
—
—
—
—
μ
s
R
X
= 10 k
, C
X
= 1000 pF
5.0
—
9
—
—
—
3.0
—
—
—
—
—
μ
s
R
X
= 10 k
, C
X
= 10000 pF
5.0
—
70
—
—
—
Pulse width match
between circuits in
the same package
Caution in use: In order to prevent any malfunctions due to noise, connect a high frequency performance
capacitor between V
and GND, and keep the wiring between the External components and
Cext, Rext/Cext pins as short as possible.
t
WQ
5.0
—
±
0.1 —
—
—
%
R
X
= 10 k
, C
X
= 1000 pF
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