HD74HC221 Dual Monostable Multivibrators (with Schmitt Trigger Input) Description Each multivibrator features both a negative, A, and a positive, B, transition triggered input, either of which can be used as an inhibit.
Also included is a clear inpt that when taken low resets the one shot.
The HD74HC221 can be triggered on the positive transition of teh clear while A is held low and B is held high.
This device is a non-retriggerable, and therefore cannot be retriggered until the output pulse times out.
The output pulse equation is simply: tW = 0.
7·(Rext)·(Cext) Features • • • • • High Speed Operation High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low I...

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