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HD74HC221

Part Number	HD74HC221
Manufacturer	Hitachi Semiconductor
Description	Dual Monostable Multivibrators (with Schmitt Trigger Input)
Published	Mar 23, 2005
Detailed Description	HD74HC221 Dual Monostable Multivibrators (with Schmitt Trigger Input) Description Each multivibrator features both a ne...
Datasheet	HD74HC221 PDF File

Overview

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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