Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
ORDERING INFORMATION
TYPE
PACKAGE
NUMBER
NAME
DESCRIPTION
VERSION
74HC123N;
74HCT123N
DIP16
SO16
plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
74HC123D;
74HCT123D
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
SOT403-1
74HC123PW;
74HCT123PW
TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
trigger inputs (negative-edge triggered)
trigger inputs (positive-edge triggered)
1, 9
2, 10
3, 11
4, 12
7
1A, 2A
1B, 2B
1RD, 2RD
1Q, 2Q
direct reset LOW and trigger action at positive edge
outputs (active LOW)
2REXT/CEXT
GND
external resistor/capacitor connection
ground (0 V)
8
13, 5
14, 6
15
1Q, 2Q
outputs (active HIGH)
1CEXT, 2CEXT
1REXT/CEXT
VCC
external capacitor connection
external resistor/capacitor connection
positive supply voltage
16
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
1998 Jul 08
3
NXP [ NXP ]
