Integrated Circuits

74423
Dual retriggerable monostable multivibrator with reset
PDF datasheet
       
1A 1  • 16 Vcc
1B 2 15 1REXT/CEXT
1R D 3 14 1CEXT
1Q 4 13 1Q
2Q 5 12 2Q
2CEXT 6 11 2R D
2REXT/CEXT 7 10 2B
GND 8 9 2A
       
Pin Symbol Description
1 1A negative-edge triggered input 1
2 1B positive-edge triggered input 1
3 1R D direct reset (active low) 1
4 1Q active low output 1
5 2Q active high output 2
6 2CEXT external capacitor connection 2
7 2REXT/CEXT external resistor and capacitor connection 2
8 GND ground
9 2A negative-edge triggered input 2
10 2B positive-edge triggered input 2
11 2R D direct reset (active low) 2
12 2Q active low output 2
13 1Q active high output 1
14 1CEXT external capacitor connection 1
15 1REXT/CEXT external resistor and capacitor connection 1
16 Vcc supply voltage


Specifications
(typical values under recommended operating conditions, unless specified)
Parameter Value Unit
Propagation delay, nR D, nA , nB to nQ or nQ 25 (74HC)
26(74HCT) 		ns
Propagation delay, nR D to nQ or nQ 20 (74HC)
22 (74HCT) 		ns
Output transition time 7 (74HC/HCT) ns
Retrigger time nA , nB 110 (74HC/HCT) ns
External timing resistor 2 (min)
1000 (max) 		k Ω

Notes
  • The 74423 is identical to the 74123, except it cannot be triggered via the reset input.

Note
Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.

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