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74HCT123 データシートの表示(PDF) - Philips Electronics
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74HCT123
Dual retriggerable monostable multivibrator with reset
Philips Electronics
74HCT123 Datasheet PDF : 17 Pages
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Philips Semiconductors
Dual retriggerable monostable
multivibrator with reset
Product specification
74HC/HCT123
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(
°
C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HCT
+25
−
40 to +85
−
40 to +125
UNIT
V
CC
(V)
min. typ. max. min. max. min. max.
WAVEFORMS/
NOTES
t
PHL
propagation delay
nR
D
, nA, nB to nQ
30 51
64
77
ns
4.5
C
EXT
= 0 pF;
R
EXT
= 5 k
Ω
t
PLH
propagation delay
nR
D
, nA, nB to nQ
28 51
64
77
ns
4.5
C
EXT
= 0 pF;
R
EXT
= 5 k
Ω
t
PHL
propagation delay
nR
D
to nQ (reset)
27 46
58
69
ns
4.5
C
EXT
= 0 pF;
R
EXT
= 5 k
Ω
t
PLH
propagation delay
nR
D
to nQ (reset)
23 46
58
69
ns
4.5
C
EXT
= 0 pF;
R
EXT
= 5 k
Ω
t
THL
/ t
TLH
output transition time
7 15
19
22 ns 4.5
t
W
trigger pulse width
nA = LOW
20 3
25
30
ns 4.5 Fig.7
t
W
trigger pulse width
nB = HIGH
20 5
25
30
ns 4.5 Fig.7
t
W
reset pulse width
nR
D
= LOW
20 7
25
30
output pulse width
t
W
nQ = HIGH
nQ = LOW
450
−
−
ns 4.5 Fig.8
C
EXT
= 100 nF;
µ
s 5.0 R
EXT
= 10 k
Ω
;
Figs 7 and 8
output pulse width
t
W
nQ = HIGH
75
−
−
nQ = LOW
C
EXT
= 0 pF;
ns 5.0 R
EXT
= 5 k
Ω
;
note 1; Figs 7 and 8
t
rt
retrigger time
nA, nB
110
−
−
C
EXT
= 0 pF;
ns 5.0 R
EXT
= 5 k
Ω
;
note 2; Fig.7
R
EXT
external timing
resistor
2
1000
−
−
k
Ω
5.0 Fig.9
C
EXT
external timing
capacitor
no limits
pF 5.0 Fig.9; note 3
1998 Jul 08
8
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