SN54AHCT123A and SN74AHCT123A are dual retriggerable monostable multivibrators with TTL-compatible inputs, Schmitt-trigger circuitry on the A, B, and CLR inputs for slow input transition rates, edge triggered from active-high or active-low gated logic inputs, retriggerable for very long output pulses, and overriding clear terminates output pulse.
This document is a technical datasheet for the SN54AHCT123A and SN74AHCT123A, which are dual retriggerable monostable multivibrators. These devices feature edge-triggered logic with TTL-voltage compatible inputs and Schmitt-Trigger circuitry on A, B, and CLR pins to handle slow input transition rates.
| Pulse Duration Control | External resistance and capacitance values |
|---|
The output pulse duration is programmed by selecting external resistance and capacitance values.
Taking CLR low reduces the output pulse duration, and a high CLR can override A or B inputs.