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BU8871F - DTMF receiver for telephones

Description

181 Communication ICs FInput / output circuits BU8871F 182 Communication ICs FElectrical characteristics DC characteristics (unless otherwise noted, Ta=25_C, VDD=5.0V) BU8871F AC characteristics (unless otherwise noted, Ta=25_C, VDD=5.0V) 183 Communication ICs FMeasurement circuits BU8871

Features

  • a wide dynamic range, eliminating the need for an external input amplifier. Expertise from a number of companies has been incorporated into these products to enable guard time control through a host microcomputer. F.

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Datasheet Details

Part number BU8871F
Manufacturer ROHM
File Size 218.63 KB
Description DTMF receiver for telephones
Datasheet download datasheet BU8871F Datasheet
Additional preview pages of the BU8871F datasheet.

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Full PDF Text Transcription

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Communication ICs DTMF receiver for telephones BU8871F The BU8871F is a DTMF receiver ICs developed for use in telephone answering machines, and converts 16 different types of DTMF signals into 4-bit binary serial data. It features a wide dynamic range, eliminating the need for an external input amplifier. Expertise from a number of companies has been incorporated into these products to enable guard time control through a host microcomputer. FApplications Telephone answering machines FFeatures 1) Dynamic range of 45dB. (internal AGC) 2) 4-bit binary serial data output. 3) Guard time can be controlled through host microcontroller. FBlock diagram 4) Input pins equipped with hysteresis. (ACK pin) 5) 4.19MHz crystal resonator can be used.
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