HTC KOREA MC34118D
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.| Part No. | MC34118D |
|---|---|
| Datasheet | MC34118D Download |
| Manufacturer |  HTC KOREA |
| Description | Voice Switched Speakerphone |
| Buy | Stock & Price |
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 Receive Paths
● 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 Dial Tone Presence
● Standard 28-Pin Plastic DIP Package and SOP Package Available
● Compatible with MC34119 Speaker Amplifier SOP-28 DIP-28
DESCRIPTION
Included are a microphone amplifier with adjustable gain and MUTE control, Transmit and Receive attenuators which operate in a complementary manner, level detectors at both input and output of both attenuators, and background noise monitors for both the transmit and receive channels. A Dial Tone Detector prevents the dial tone from being attenuated by the Receive background noise monitor circuit. Also included are two line driver amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer.
