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74HC123

Schematic symbol

Dual retriggerable monostable multivibrator (one-shot): Each half makes an output pulse whose length is set by a capacitor between Cext and Rext/Cext and a resistor from Rext/Cext to VCC. It triggers on a falling edge of A while B is high, or a rising edge of B while A is low, and a new trigger during the pulse stretches it. A rising edge on RD (with A low and B high) also triggers it, and RD low ends the pulse. Same pinout as the 74LS123.

integrated circuit IC chip 7400 series logic monostable one-shot timer retriggerable 74HCT123 74LS123 74123

Details

Reference Character
U
Default Value
74HC123
Library
Circuit Canvas Library