1.

General description

The 74LVC1G123 is a single retriggerable monostable multivibrator with Schmitt trigger

inputs. Output pulse width is controlled by three methods:

2. Once triggered, the basic output pulse width may be extended by retriggering the

gated active LOW-going edge input (A) or the active HIGH-going edge input (B). By

repeating this process, the output pulse period (Q = HIGH) can be made as long as

desired. Alternatively an output delay can be terminated at any time by a LOW-going

edge on input CLR, which also inhibits the triggering.

3. An internal connection from CLR to the input gates makes it possible to trigger the

circuit by a HIGH-going signal at input CLR.

Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these

devices as translators in a mixed 3.3 V and 5 V environment. Schmitt trigger inputs,

makes the circuit highly tolerant to slower input rise and fall times.

circuitry disables the output, preventing the damaging backflow current through the device

when it is powered down.

2.

Features and benefits



24 mA output drive (V

74LVC1G123

Single retriggerable monostable multivibrator; Schmitt trigger

inputs

Rev. 4 — 27 November 2013

Product data sheet