U74HC123

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 10

www.unisonic.com.tw

QW-R502-A10.A

PIN CONFIGURATION



FUNCTION TABLE

INPUTS

OUTPUTS

D

nR

nA

nB

nQ

nQ

L

X

X

L

H

X

H

X

L(2)

H(2)

X

X

L

L(2)

H(2)

H

L

↑

H

↓

H

↑

L

H

Note: 1. H: HIGH voltage level L: LOW voltage level X: don’care ↑: LOW-to-HIGH transition

↓: HIGH-to-LOW transition

: one HIGH level output pulse

: one LOW level output pulse

2. If the monostable was triggered before this condition was established, the pulse will continue as

programmed.