74AHC123A Datasheet, PDF (15/24 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

Philips Semiconductors
Dual retriggerable monostable multivibrator
with reset
Product specification
74AHC123A;
74AHCT123A
Type 74AHCT123A
GND = 0 V; t_r = t_f ≤ 3.0 ns.
SYMBOL PARAMETER
TEST CONDITIONS
WAVEFORMS
C_L
T_amb (°C)
25
−40 to +85 −40 to +125 UNIT
MIN. TYP. MAX. MIN. MAX. MIN. MAX.
V_CC = 4.5 to 5.5 V; note 1
t_PHL/t_PLH
propagation delay; C_EXT = 0 pF;
nA, nB to nQ, nQ R_EXT = 5 kΩ; see
Figs 7 and 11
15 pF −
propagation delay; C_EXT = 0 pF;
−
nR_D to nQ, nQ
R_EXT = 5 kΩ; see
Figs 7 and 11
propagation delay; C_EXT = 0 pF;
−
nR_D to nQ, nQ
R_EXT = 5 kΩ; see
(reset)
Figs 7 and 11
propagation delay; C_EXT = 0 pF;
nA, nB to nQ, nQ R_EXT = 5 kΩ; see
Figs 7 and 11
50 pF −
propagation delay; C_EXT = 0 pF;
−
nR_D to nQ, nQ
R_EXT = 5 kΩ; see
Figs 7 and 11
propagation delay; C_EXT = 0 pF;
−
nR_D to nQ, nQ
R_EXT = 5 kΩ; see
(reset)
Figs 7 and 11
t_W
trigger pulse
see Fig 8
width; nA = LOW
50 pF 5.0
trigger pulse
see Fig 8
5.0
width; nB = HIGH
reset pulse width; see Fig 9
5.0
nR_D = LOW
output pulse width; C_EXT = 28 pF;
−
nQ = HIGH;
R_EXT = 2 kΩ; note 2;
nQ = LOW
see Figs 8, 9 and 10
C_EXT = 0.01 µF;
90
R_EXT = 10 kΩ;
note 2; see
Figs 8, 9 and 10
C_EXT = 0.1 µF;
0.9
R_EXT = 10 kΩ;
note 2; see
Figs 8, 9 and 10
5.0 12 1.0
5.2 12.9 1.0
4.7 9.4 1.0
7.1 14 1.0
7.5 14.9 1.0
6.7 11.4 1.0
−−
5.0
−−
5.0
−−
5.0
100 200 −
100 110 90
1 1.1 0.9
14 1.0 15.5 ns
15.0 1.0 16.5 ns
11 1.0 12.0 ns
16 1.0 17.5 ns
17.0 1.0 18.5 ns
13 1.0 14.5 ns
−
5.0 −
ns
−
5.0 −
ns
−
5.0 −
ns
240 −
240 ns
110 85 115 µs
1.1 0.85 1.15 ms
2000 Mar 15
15