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U4055B - Low-Voltage Electronic Speech Circuit

General Description

The U4055B electronic speech circuit is a linear integrated circuit for use in telephone and other line fed terminal equipment.

It replaces the common speech circuit with carbon microphone, hybrid transformer, sidetone equivalent and ear protection rectifiers.

Key Features

  • www. DataSheet4U. com D An electronic circuit replaces the microphone hybrid transformer D Symmetrical input for dynamic or piezo microphone D High performance through the use of dynamic transducers as the earphone (non-linear distortion 2 %) D DTMF interface with muting D Supply voltage for dialer D High range of line feeding current D Input resistance independent of line current and sidetone suppression circuit. D Built-in ear protection by earphone voltage limiter D Operation possible from 8.

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Other Datasheets by TEMIC Semiconductors (now Microchip)

Part Number Description
U4055B1 Low-Voltage Electronic Speech Circuit
U4050B Speech Circuit
U4030B Telephone Speech Circuit
U4070B-FP Tone Ringer Interface
U4074B Tone Ringer Interface

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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U4055B/U4055B1 Low-Voltage Electronic Speech Circuit with Dialer Interface Description The U4055B electronic speech circuit is a linear integrated circuit for use in telephone and other line fed terminal equipment. It replaces the common speech circuit with carbon microphone, hybrid transformer, sidetone equivalent and ear protection rectifiers. A low-cost electrodynamic transducer is used as the earphone. It contains all components necessary for amplification of signals and adaption to the line. Features www.DataSheet4U.