TECHNICAL DATA

IL6840

Telephone Tone Ringer with

Bridge Diode

ORDERING INFORMATION

IL6840N Plastic DIP

IL6840D

SOIC

for package

The IL6840 is a monolithic integrated circuit telephone tone ringer with

bridge diode, when coupled with an appropriate transducer, it replaces

the electro-mechanical bell. The device is designed for use with either a

piezo transducer or an inexpensive transformer coupled speaker to

voltage is obtained from the AC ring signal and the circuit is designed so

that noise on the line or variation of the ringing signal can not affect

correct operation of the device.

• On chip high voltage full wave diode bridge rectifier

• Low current consumption, in order to allow the parallel operation of

the 4 devices

• Low external component count

• Tone and switching frequencies adjustable by external components

• High noise immunity due to built-in voltage-current hysteresis

• Activation voltage adjustable

• Internal zener diodes to protect against over voltages

• Ringer impedance adjustable with external components

PIN ASSIGNMENT

OUT

OUT

BLOCK DIAGRAM

1