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PBL38541 - Universal Speech Circuit

General Description

PBL 38541 is a monolithic integrated speech transmission circuit for use in electronic telephones or in any other line interface application.

High settable supply current for auxiliary functions, up to 6.0 mA (at high line currents).

Key Features

  • Minimum number of external components, with two filtered DCsupplies, 7 capacitors and 11 resistors. Easy adaption to various market needs. Mute control input for operation with DTMF - generator. A separate signaling input for payphone and DTMF tones controlled by mute. Transmitter and receiver gain regulation for automatic loop loss compensation. Extended current and voltage range 4 - 130 mA, down to 2 .2V. Differential microphone input for good balance to ground. Balanced receiver ou.

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Datasheet Details

Part number PBL38541
Manufacturer Ericsson
File Size 277.23 KB
Description Universal Speech Circuit
Datasheet download datasheet PBL38541 Datasheet

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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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PBL 385 41 November 1998 PBL 385 41 Universal Speech Circuit Description. PBL 38541 is a monolithic integrated speech transmission circuit for use in electronic telephones or in any other line interface application. High settable supply current for auxiliary functions, up to 6.0 mA (at high line currents). The circuit is designed to accomodate either a low impedance dynamic or an electret microphone. Microphone can be muted separately. Payphone signaling and DTMF dialling tones have a separate input that is controlled by a mute signal. A signal summing point is available at the transmitter input. An internally preset line length compensation can be adjusted with external resistors to fit into different current feed systems as for ex.