Datasheet

74HC_HCT123 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 9 — 19 January 2015 8 of 25
NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit
Min Typ Max Min Max Min Max
74HC123
t
pd
propagation
delay
nRD, nA, nB to nQ or nQ;
C
EXT
= 0 pF;
R
EXT
=5k;
see Figure 9
[1]
V
CC
= 2.0 V - 83 255 - 320 - 385 ns
V
CC
= 4.5 V - 30 51 - 64 - 77 ns
V
CC
= 5 V; C
L
= 15 pF - 26 - - - - - ns
V
CC
= 6.0 V - 24 43 - 54 - 65 ns
nRD
(reset) to nQ or nQ;
C
EXT
=0pF;
R
EXT
=5k;
see Figure 9
V
CC
= 2.0 V - 66 215 - 270 - 325 ns
V
CC
= 4.5 V - 24 43 - 54 - 65 ns
V
CC
= 5 V; C
L
= 15 pF - 20 - - - - - ns
V
CC
= 6.0 V - 19 37 - 46 - 55 ns
t
t
transition time see Figure 9
[1]
V
CC
= 2.0 V - 19 75 - 95 - 110 ns
V
CC
= 4.5 V - 7 15 - 19 - 22 ns
V
CC
= 6.0 V - 6 13 - 16 - 19 ns
t
W
pulse width nA LOW; see Figure 10
V
CC
= 2.0 V 100 8 - 125 - 150 - ns
V
CC
= 4.5 V 20 3 - 25 - 30 - ns
V
CC
= 6.0 V 17 2 - 21 - 26 - ns
nB HIGH; see Figure 10
V
CC
= 2.0 V 100 17 - 125 - 150 - ns
V
CC
= 4.5 V 20 6 - 25 - 30 - ns
V
CC
= 6.0 V 17 5 - 21 - 26 - ns
nRD
LOW; see Figure 11
V
CC
= 2.0 V 100 14 - 125 - 150 - ns
V
CC
= 4.5 V 20 5 - 25 - 30 - ns
V
CC
= 6.0 V 17 4 - 21 - 26 - ns
nQ HIGH and nQ
LOW;
V
CC
=5.0V;
see Figure 10
and 11
[2]
C
EXT
= 100 nF;
R
EXT
= 10 k
-450- - - - - s
C
EXT
= 0 pF;
R
EXT
=5k
-75- - - - -ns