Product Summary

The MC34014DWR2 is a speaker-phone integrated circuit. It includes all the active circuitry and control functions to implement a high quality hands-free telephone system. The MC34014DWR2 includes a microphone amplifier, a speaker amplifier, level detectors, a background sound level monitoring system in both the transmit and receive channels and an attenuation system which can control the transmit and receive levels as well as the background level.


MC34014DWR2 absolute maximum ratings: (1)V+ terminal Voltage (pin 16): +12, -1.0 V; (2)CS (pin 18): +12, -1.0 V; (3)Speaker amplifier Ground(pin 14): +3.0, -1.0 V; (4)VLC(pin 24): +VCC, -1.0 V; (5)Storage temperature TSTG: -65 ~ +150℃.


MC34014DWR2 features: (1)Chip Select pin for Power conservation (active/standby mode); (2)Integrated all necessary active circuitry for a hand-free telephone into one single chip; (3)Operating under wide dynamic range through signal compression technology; (4)Build-In voltage regulators illuminate external regulators for lining operation; (5)Monitoring system for background noise level; (6)Background sound level compensation for transmit and receive levels as well as the background level; (7)Power audio amplifier for typical 100mW output (into 25) with peak limiting for speaker to minimize distortion; (8)Volume control function for external volume control circuit.


MC34014DWR2 block diagram