UNISONIC TECHNOLOGIES CO., LTD

LS1240A

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 5

Copyright © 2012 Unisonic Technologies Co., Ltd

QW-R108-002.I

ELECTRONIC TONE RINGER

WITH BUILT-IN BRIDGE

RECTIFIER

DESCRIPTION

The UTC LS1240A is monolithic integrated circuits and

designed to be as a telephone ringer. It can drive a piezo-ceramic

converter(buzzer) directly. The output current capacity of UTC

LS1240A is higher than standard ringer. For driving a dynamic

loudspeaker, UTC LS1240A needs only a decoupling capacitor to

replace the usual transformer in use.

FEATURES

* Low current consumption.

* Integrated rectifier bridge with zener diodes to overvoltage

Protection.

* Minimum external circuitry.

* Both frequencies of tone and switching are adjustable by external

components.

* Integrated voltage and current hysteresis.

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

LS1240AL-D08-T

LS1240AG-D08-T

DIP-8

Tube

LS1240AL-S08-R

LS1240AG-S08-R

SOP-8

Tape Reel

LS1240AL-S08-T

LS1240AG-S08-T

SOP-8

Tube