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BU8874

Part Number	BU8874
Manufacturer	Rohm
Description	DTMF receiver for telephones
Published	Apr 17, 2005
Detailed Description	Communication ICs DTMF receiver for telephones BU8874 / BU8874F The BU8874 and BU8874F are DTMF receiver ICs developed ...
Datasheet	BU8874 PDF File

Overview

Communication ICs DTMF receiver for telephones BU8874 / BU8874F The BU8874 and BU8874F are DTMF receiver ICs developed for use in telephone answering machines, and convert 16 different types of DTMF signals into 4-bit binary serial data.
In addition to a compact 8-pin DIP (BU8874) package, these receivers feature 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 microcontroller.
FApplications Telephone answering machines FFeatures 1) Dynamic range of 45dB.
(internal AGC) 2) Power down mode.
3) 4-bit binary serial data output.
4) Guard time can ...

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