The MM54 74HC123A high speed monostable multivibrators (one shots) utilize advanced silicon-gate CMOS technology They feature speeds comparable to low power Schottky TTL circuitry while retaining the low power and high noise immunity characteristic of CMOS circuits Each multivibrator features both a negative A and a positive B transition triggered input either of which can be used as an inhibit input Also included is a clear input that when taken low resets the one shot The 'HC123 can be triggered on the positive transition of the clear while A is held low and B is held high