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74VHC123A - Dual Retriggerable Monostable Multivibrator

Download the 74VHC123A datasheet PDF. This datasheet also covers the 74VHC variant, as both devices belong to the same dual retriggerable monostable multivibrator family and are provided as variant models within a single manufacturer datasheet.

General Description

The VHC123A is an advanced high speed CMOS Monostable Multivibrator fabricated with silicon gate CMOS technology.

It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.

Key Features

  • 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 VHC123A can be triggered on the positive transition of the clear while A is held low and B is held high. The output pulse width is determined by the equation: PW = (Rx)(Cx); where PW is in seconds, R is in ohms, and C is in farads. Limits for Rx and Cx are: External capacitor, Cx No limit External resistors.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74VHC-123AM.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Fairchild (now onsemi)

Part Number Description
74VHC125 Quad Buffer
74VHC112 Dual J-K Flip-Flops
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74VHC139 Dual 2-to-4 Decoder/Demultiplexer

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
( DataSheet : www.DataSheet4U.com ) 74VHC123A Dual Retriggerable Monostable Multivibrator July 1993 Revised April 1999 74VHC123A Dual Retriggerable Monostable Multivibrator General Description The VHC123A is an advanced high speed CMOS Monostable Multivibrator fabricated with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. Each multivibrator features 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 VHC123A can be triggered on the positive transition of the clear while A is held low and B is held high.