IL2418 查看數據表（PDF） - Unspecified

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IL2418

Telephone Tone Ringer with Bridge Diode

Unspecified 

Telephone Tone Ringer with

Bridge Diode

TECHNICAL DATA

IL2418

The IL2418 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

produce a pleasing tone composed of a high frequency (fR) alternating

with a low frequency (fL) resulting in a warble frequency. The supply

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

ORDERING INFORMATION

IL2418N Plastic

TA = -20° to 70° C

for package

PIN ASSIGNMENT

BLOCK DIAGRAM

1

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