參數(shù)資料
型號: 74HC123
廠商: NXP Semiconductors N.V.
英文描述: Dual retriggerable monostable multivibrator with reset
中文描述: 雙retriggerable單穩(wěn)態(tài)觸發(fā)器的復(fù)位
文件頁數(shù): 6/17頁
文件大?。?/td> 124K
代理商: 74HC123
1998 Jul 08
6
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS/
NOTES
+25
40 to +85
40 to +125
min.
typ.
max. min.
max.
min.
max.
t
PLH
propagation delay
nR
D
, nA, nB to nQ
83
30
24
83
30
24
66
24
19
66
24
19
19
7
6
8
3
2
17
6
5
14
5
4
255
51
43
255
51
43
215
43
37
215
43
37
75
15
13
320
64
54
320
64
54
270
54
46
270
54
46
95
19
16
385
77
65
385
77
65
325
65
55
325
65
55
110
22
19
ns
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
C
EXT
= 0 pF;
R
EXT
= 5 k
t
PLH
propagation delay
nR
D
, nA, nB to nQ
ns
C
EXT
= 0 pF;
R
EXT
= 5 k
t
PHL
propagation delay
nR
D
to nQ (reset)
ns
C
EXT
= 0 pF;
R
EXT
= 5 k
t
PLH
propagation delay
nR
D
to nQ (reset)
ns
C
EXT
= 0 pF;
R
EXT
= 5 k
t
THL
/ t
TLH
output transition
time
ns
t
W
trigger pulse width
nA = LOW
100
20
17
100
20
17
100
20
17
125
25
21
125
25
21
125
25
21
150
30
26
150
30
26
150
30
26
ns
Fig.7
t
W
trigger pulse width
nB = HIGH
ns
Fig.7
t
W
reset pulse width
nR
D
= LOW
ns
Fig.8
t
W
output pulse width
nQ = HIGH
nQ = LOW
output pulse width
nQ = HIGH
nQ = LOW
450
μ
s
5.0
C
EXT
= 100 nF;
R
EXT
= 10 k
;
Figs 7 and 8
C
EXT
= 0 pF;
R
EXT
= 5 k
;
note 1; Figs 7 and 8
C
EXT
= 0 pF;
R
EXT
= 5 k
;
note 2; Fig.7
t
W
75
ns
5.0
t
rt
retrigger time
nA, nB
110
ns
5.0
R
EXT
external timing
resistor
external timing
capacitor
10
2
1000
1000
k
2.0
5.0
Fig.9
C
EXT
no limits
pF
5.0
Fig.9; note 3
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