KA2428 Overview
KA2418B/28 INTRODUCTION TONE RINGER WITH BRIDGE DIODE The KA2418B/28 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 posed of a high frequencys (fH1, fH2) alternating...
KA2428 Key Features
- Built-in full wave bridge diode rectifier
- Low current consumption, in order to allow the parallel operation of the 4 devices
- Few external ponents
- Tone and adjustable switching frequencies by external ponents
- High noise immunity due to built-in voltage to current hysteresis
- Adjustable activation voltage
- Internal zener diodes to protect against over voltages
- Adjustable ringer impedance with external ponents
- 20°C ~ + 70°C