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74221 Datasheet

The 74221 is a Dual Monostable Multivibrators. Download the datasheet PDF and view key features and specifications below.

Part Number74221
ManufacturerHitachi Semiconductor
Overview 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 o. 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 dev.
Part Number74221
DescriptionDual Non-Retriggerable Monostable Multivibrator
ManufacturerFairchild Semiconductor
Overview The MM74HC221A high speed monostable multivibrators (one shots) utilize advanced silicon-gate CMOS technology. They feature speeds comparable to low power Schottky TTL circuitry while retaining the lo. 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 shot. The MM74HC221A can be triggered on the positive transition of the clear while A is held LOW and B is held HIGH. .
Part Number74221
DescriptionDual non-retriggerable monostable multivibrator
ManufacturerNXP Semiconductors
Overview The 74HC/HCT221 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT221 are dual no.
* Pulse width variance is typically less than ± 5%
* Pin-out identical to “123”
* Overriding reset terminates output pulse
* nB inputs have hysteresis for improved noise immunity
* Output capability: standard (except for nREXT/CEXT)
* ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT221 are high-sp.