MC34118
features of a featurephone. z Improved Attenuator Gain Range:52d B Between Transmit and Receive z Low Voltage Operation for Line-Powered Applications (3.0-6.5V) z 4-Point signal Sensing for improved Sensitivity z Background Noise Monitors for Both Transmit and Receive
Paths z Microphone Amplifier Gain Set by External Resistors
- Mute
Function Included z Chip Disable for Active/Standby Operation z On Board Filter Pinned-Out for User Defined Function z Dial Tone Detector to Inhibit Receive idle mode During Dial Tone
Presence z Standard 28-Pin Plastic DIP Package and SOIC Package
Available z patible with MC34119 Speaker Amplifier
SIMPLIFIED BLOCK DIAGRAM
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VOICE SWITHCHED SPEAKERPHONE CIRCUIT SILICON MONOLITHIC INIEGRATED CIRCUIT
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