Summary
Dual Precision Retriggerable/Resettable Monostable Multivibrators
Description
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 short. The HD74HC4538 is retriggerable. That is, it may be triggered repeatedly while their outputs are generating a pulse and the pulse will be extended. Pulse width stability over a wide range of temperature. The output pulse equation is simply: tw= 0.7 (R)(C).
Source title
74HC4538 Datasheet(PDF) - Hitachi Semiconductor