TS2418
Telephone tone ringer with bridge diode
Supply Voltage 26V (max.) Calling Voltage (f=50Hz) Continuous
General D...
TS2418
Telephone tone ringer with bridge diode
Supply
Voltage 26V (max.) Calling
Voltage (f=50Hz) Continuous
General Description
The TS2418 is a monolithic integrated circuit telephone tone ringer with bridge diode, when coupled with an appropriate transducer, it replaces the electromechanical bell. This 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.
Features
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
Ordering Information
Part No.
TS2418CD TS2418CS
Operating Temp.
o -20 ~ +70 C
Package
DIP-8 SOP-8
www.DataSheet4U.com
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.
Block Diagram
TS2418
1-4
2004/09 rev. A
Absolute Maximum Rating
Description
Calling
Voltage (f=50Hz) Continuous Calling
Voltage (f=50Hz) 5 Sec ON/10 Sec OFF Supply Curren...