Rev.6.00 Jun. 02, 2004 page 1 of 15

HD74LV123A

Dual Retriggerable Monostable Multivibrators

REJ03D0314–0600Z

(Previous ADE-205-258D (Z))

Rev.6.00

Jun. 02, 2004

Description

The HD74LV123A features output pulse-duration control by three methods. In the first method, the A input is low and

the B input goes high. In the second method, the B input is high and the

A input goes low. In the third method, the A

input is low, the B input is high, and the clear (

CLR) input goes high.

The basic pulse duration is programmed by selecting external resistance and capacitance values.

The external timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor

connected between Rext/Cext and Vcc

To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and Vcc.

Once triggered, the basic pulse duration can be extended by retriggering the gated low-level-active (

A) or high-level-

active (B) input. Pulse duration can be reduced by taking

CLR low.

Features

• V

• All inputs V

• All outputs V

• Output current ±6 mA (@V

• Ordering Information

Part Name

Package Type

Package Code

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74LV123AFPEL

SOP–16 pin(JEITA)

FP–16DAV

FP

EL (2,000 pcs/reel)

HD74LV123ARPEL

SOP–16 pin(JEDEC)

FP–16DNV

RP

EL (2,500 pcs/reel)

HD74LV123ATELL

TSSOP–16 pin

TTP–16DAV

T

ELL (2,000 pcs/reel)

Note: Please consult the sales office for the above package availability.