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74221 Datasheet

Part NameDescriptionManufacturer
74221 Dual Monostable Multivibrators (with Schmitt Trigger Input) Hitachi
Hitachi -> Renesas Electronics Hitachi
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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.

74221

 

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