The HCC4538B (extended temperature range) and HCF4538B (intermediate temperature range) are monolithic integrated circuit, available in 16-lead dual in-line plastic or-ceramic package and plastic micro package. The HCC/HCF4538B dual precision monostable multivibrator provides stable retriggerable/resettable one-shot operation for any fixedvoltage timing application. An external resistor (RX) and an external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q terminals. The time delay from trigger input to output transition (trigger propagation delay) and the time delay from reset input to output transition (reset propagation delay) are independent of RX and CX. Precision control of output pulse widths is achieved through linear CMOS techniques. Leading-edge-triggering (+ TR) and trailing-edge-triggering ( TR) inputs are provided for triggering from either edge of an input pulse. An unused + TR input should be tied to VSS. An unused TR input should be tied to VDD. A RESET (on low level) is provided for immediate termination of the output pulse or to September 1988