The M54/74HC423/423A are high speed CMOS MONOSTABLE multivibrators fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. There are two trigger inputs, A INPUT (negative edge) and B INPUT (positive edge). These inputs are valid for rising/falling signals, (tr tf 1 sec). After triggering the output maintains the MONOSTABLE state for the time period determined by the external resistor Rx and capacitor Cx.