125 datasheet(1/31 Pages) NEXPERIA

Part #	125

Description	Single retriggerable monostable multivibrator; Schmitt trigger inputs

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Manufacturer	NEXPERIA [Nexperia B.V. All rights reserved]

Direct Link	https://www.nexperia.com/

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1.

General description

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

inputs. Output pulse width is controlled by three methods:

1. The basic pulse is programmed by selection of an external resistor (REXT) and

capacitor (CEXT).

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.

This device is fully specified for partial power-down applications using IOFF. The IOFF

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

when it is powered down.

2.

Features and benefits

 Wide supply voltage range from 1.65 V to 5.5 V

 High noise immunity



24 mA output drive (V

CC =3.0 V)

 CMOS low power consumption

 DC triggered from active HIGH or active LOW inputs

 Retriggerable for very long pulses up to 100 % duty factor

 Direct reset terminates output pulse

 Schmitt trigger on all inputs

 Complies with JEDEC standard:

 JESD8-7 (1.65 V to 1.95 V)

 JESD8-5 (2.3 V to 2.7 V)

 JESD8-B/JESD36 (2.7 V to 3.6 V)

 Power-on-reset on outputs

 Latch-up performance exceeds 100 mA

 Direct interface with TTL levels

74LVC1G123

Single retriggerable monostable multivibrator; Schmitt trigger

inputs

Rev. 5 — 14 June 2016

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125 Datasheet(PDF) 1 Page - Nexperia B.V. All rights reserved

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