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U3810BM

Part Number	U3810BM
Manufacturer	TEMIC Semiconductors
Description	Multi Standard Feature Phone Integrated Circuit
Published	Apr 16, 2005
Detailed Description	TELEFUNKEN Semiconductors U3810BM Multi Standard Feature Phone Integrated Circuit Description The U3810BM multi-standa...
Datasheet	U3810BM PDF File

Overview

TELEFUNKEN Semiconductors U3810BM Multi Standard Feature Phone Integrated Circuit Description 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, a power supply, a clock and a reset for the microcontroller.
Transmit, receive and loudhearing gains control / AGC range / DTMF frequencies, pre-emphasis and level / melody generator, and mutes are programmable through the serial bus.
Block diagramm Speech circuit Serial bus Loudhearing LH and Tone ringing DTMF dialer Tone ringer MC with EEPROM 93 7600 e Figure 1 Applications D Feature phones D Answering machines D Fax machines Benefits D Complete system integration of analog signal processing and digital control circuitry D One IC for various PTT standards, e.
g.
programmable specification via mC D Only three low-cost transducers needed (instead of four) Rev.
A1: 19.
01.
1996 1 (31) U3810BM 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 versus available current and voltage D Dynamic components impedance adjustable by external D Switching regulator in ringing phase D Input ringing detection, threshold and impedance adjustable with external resistors...

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U3810BM Multi Standard Feature Phone Integrated Circuit - TEMIC Semiconductors

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