TCA3385DP supplier inquiry
The Motorola TCA3385 is a high efficiency telephone ring signal converter designed for use with the TCA3386 or as a stand-alone device. Together with a microprocessor, these devices form the basis for a high-performance feature telephone set.
The circuit includes a switching regulator which converts the ring signal from the telephone line into a DC supply signal suitable for powering other devices during the ringing phase. It features two modes of operation: fixed internal or programmable ring detect threshold, and offers lightning and mains protection.
| Operating Junction Temperature | +150 °C |
|---|---|
| Line Voltage (Max) | 120 Vrms |
| Input Impedance Range | 3K to 15K Ohms |
| Power Supply Efficiency | 50 to 55 % |
| Switching Frequency Range | 25 to 45 KHz |
The device offers fixed internal or programmable ring detect threshold modes.
A 500 ohms series resistor is recommended as a minimum to prevent excessive currents.