Datasheet

1998 Jul 08 3
Philips Semiconductors Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
ORDERING INFORMATION
PIN DESCRIPTION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
74HC123N;
74HCT123N
DIP16 plastic dual in-line package; 16 leads (300 mil); long body SOT38-1
74HC123D;
74HCT123D
SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
74HC123DB;
74HCT123DB
SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1
74HC123PW;
74HCT123PW
TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1
PIN NO. SYMBOL NAME AND FUNCTION
1, 9 1
A, 2A trigger inputs (negative-edge triggered)
2, 10 1B, 2B trigger inputs (positive-edge triggered)
3, 11 1
R
D
, 2R
D
direct reset LOW and trigger action at positive edge
4, 12 1
Q, 2Q outputs (active LOW)
72R
EXT
/C
EXT
external resistor/capacitor connection
8 GND ground (0 V)
13, 5 1Q, 2Q outputs (active HIGH)
14, 6 1C
EXT
, 2C
EXT
external capacitor connection
15 1R
EXT
/C
EXT
external resistor/capacitor connection
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.