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U4080B - Voice-Switched Circuit for Handsfree Operation

General Description

The voice switched speakerphone integrated circuit, U4080B, incorporates a variety of functions (see below).

The versality of the device is further enhanced by the provision of a large number of pins giving access to internal circuit points.

Key Features

  • D Operates on telephone lines, integrated reference voltage regulation D Output power: 100 mW at a 25-Ω load with peak limitation D Linear volume control D Monitoring system for background sound level D Wide operating dynamic range through signal compression D Chip select pin for active/standby operation Block Diagram /.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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U4080B Voice-Switched Circuit for Handsfree Operation Description The voice switched speakerphone integrated circuit, U4080B, incorporates a variety of functions (see below). The versality of the device is further enhanced by the provision of a large number of pins giving access to internal circuit points. Features D Operates on telephone lines, integrated reference voltage regulation D Output power: 100 mW at a 25-Ω load with peak limitation D Linear volume control D Monitoring system for background sound level D Wide operating dynamic range through signal compression D Chip select pin for active/standby operation Block Diagram / Application Circuit Figure 1. Block diagram and application circuit TELEFUNKEN Semiconductors Rev.