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BU8871F Datasheet(PDF) 1 Page - Rohm |
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BU8871F Datasheet(HTML) 1 Page - Rohm |
1 / 12 page 180 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 microcon- troller. 4) Input pins equipped with hysteresis. (ACK pin) 5) 4.19MHz crystal resonator can be used. FBlock diagram |
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