參數(shù)資料
型號(hào)： HD74HC423A
廠商： Hitachi,Ltd.
英文描述： Dual Retriggerable Monostable Multivibrators
中文描述： 雙Retriggerable單穩(wěn)態(tài)多頻振蕩器
文件頁數(shù)： 4/8頁
文件大小： 51K
代理商： HD74HC423A
HD74HC423A
4
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
—
—
210 —
265
ns
A or B to Q
4.5
—
20
42
—
53
6.0
—
—
36
—
45
t
PHL
2.0
—
—
240 —
300
ns
A or B to
Q
4.5
—
21
48
—
60
6.0
—
—
41
—
51
t
PHL
2.0
—
—
170 —
215
ns
Clear to Q
4.5
—
17
34
—
43
6.0
—
—
29
—
37
t
PLH
2.0
—
—
180 —
225
ns
Clear to
Q
4.5
—
15
36
—
45
6.0
—
—
31
—
38
Pulse width
t
w
2.0
150 —
—
190
—
ns
A, B, Clear
4.5
30
6
—
38
—
6.0
26
—
—
33
—
Removal time
t
rem
2.0
0
—
—
5
—
ns
Clear
4.5
0
–3
—
5
—
6.0
0
—
—
5
—
Minimum output
t
WQ (min)
2.0
—
1.5
—
—
—
μ
s
Cext = 28 pF
Rext = 6 k
Rext = 2 k
pulse width
4.5
—
450 —
—
—
ns
6.0
—
380 —
—
—
Output pulse width t
WQ
Output rise/fall
4.5
—
1.0
—
—
—
ms
Cext = 0.1
μ
F, Rext = 10 k
t
TLH
t
THL
2.0
—
—
75
—
95
ns
time
4.5
—
5
15
—
19
6.0
—
—
13
—
16
Input capacitance
Cin
—
—
—
20
—
20
pF
Pins 7 & 15
—
—
5
10
—
10
Other pins
Caution in use: In order to prevent any malfunctions due to noise, connect a highfrequency performance
capacitor between V
and GND, and keep the wiring between the external components and
Cext, Rext/Cext pins as short as possible.
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