The 74HC/HCT221 is a dual non-retriggerable monostable multivibrator with reset
The Philips 74HC/HCT221 is a high-speed Si-gate CMOS device featuring dual non-retriggerable monostable multivibrators. It is pin compatible with low power Schottky TTL (LSTTL) and specified in compliance with JEDEC standard no. 7A. Each multivibrator includes active LOW-going and active HIGH-going edge inputs, allowing for flexible pulse triggering.
| Pulse width variance | typically less than + 5% |
|---|---|
| Icc category | MSI |
| Output pulse width | 630 to 805 us |
The nRp inputs are direct reset inputs that are active LOW and can terminate the output pulse.
The output pulse width is defined by the relationship tw = 0.7CextRext.