U3810BM - TEMIC Semiconductors

U3810BM Multi Standard Feature Phone Integrated Circuit

The U3810BM multi-standard feature phone circuit is designed to be used with a microcontroller using a 2-wire serial bus. It performs all speech and line interface functions required in an electronic telephone set: the ringing function with switching regulator and melody generator, the DTMF dialling, the loudhearing with antilarsen and antidistortion systems.

Features

D Slope of DC characteristics adjustable by an external resistor TELEFUNKEN Semiconductors D Loudhearing gain programmable in eight steps of 4 dB, using the serial bus, or linearly adjusted, using a potentiometer D Gain of transmit and receive amplifiers automatically adjusted by line length control D Anti-larsen system efficiency is increased when inhibiting squelch D Regulation range adjustable by the serial bus D Possibility of fixed gain (PABX) D Sidetone balancing system adjustable with line length or by the serial bus D Loudhearing anti-distortion system by automatic gain control v.