MC34118 Overview
The MC34118 Voice Switched Speakerphone Circuit incorporates the necessary amplifiers, attenuators, level detectors, and control algorithm to form the heart of a high quality hands-free speakerphone system. Included are a microphone amplifier with adjustable gain and MUTE control, Transmit and Receive attenuators which operate in a plementary manner, level detectors at both input and output of both attenuators, and...
MC34118 Key Features
- Improved Attenuator Gain Range: 52dB Between Transmit and Receive
- Low Voltage Operation for Line-Powered Application (3.0V to 6.5V)
- 4-Point Signal Sensing for Improved Sensitivity
- Background Noise Monitors for Both Transmit and
- Microphone Amplifier Gain Set by External Resistors
- Mute Function Included
- Chip Disable for Active/Standby Operation
- Dial Tone Detector to Inhibit Receive Idle Mode During
- Standard 28-Pin Plastic DIP Package and SOP
- patible with MC34119 Speaker Amplifier
