UTC34018 - Youwang

UTC34018 Voice Switched Speakerphone

LI NEAR I NTEGRATED CI RCUI T The UTC34018 speakerphone integrated circuit incorporates the necessary amplifier, attenuators, and control functions to produce a high quality hands-free speakerphone system. Included are a microphone amplifier, a power audio amplifier for the speaker, transmit and receive attenuators, a monitoring system for background sound.

Features

*All necessary level detection and attenuation controls for a hand-free telephone in a single integrated circuit
*Background noise level monitoring with long time constant
*Wide operating dynamic range through signal compression
*On-chip supply and reference voltage regulation
*Typical 100mW output power(into 25 ohms)with peak limiting to minimize distortion
*Chip Select pin for active/standby operation
*Linear Volume control function
*Standard 28-pin plastic DIP package ABSOLUTE MAXIMUM RATINGS(Ta=25°C Voltages referred to pin 22) CHARACTERISTICS V+ terminal Voltage (pin 16) (pin 18) Speake.