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TS2418 Datasheet

  • TS2418

  • Telephone tone ringer with bridge diode

  • 4頁

  • TSC

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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 (f
R
) alternating with a
low frequency (f
L
) 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
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
Part No.
TS2418CD
TS2418CS
Operating Temp.
o
-20 ~ +70 C
Package
DIP-8
SOP-8
Block Diagram
TS2418
1-4
2004/09 rev. A

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