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BU8871F

Rohm
Part Number BU8871F
Manufacturer Rohm
Description DTMF receiver for telephones
Published Apr 17, 2005
Detailed Description Communication ICs DTMF receiver for telephones BU8871F The BU8871F is a DTMF receiver ICs developed for use in telephon...
Datasheet PDF File BU8871F PDF File

BU8871F
BU8871F

Overview
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.
180 Communication ICs FAbsolute maximum ratings (Ta=25_C) BU8871F FRecommended operating conditions (Ta=25_C) FPin descriptions 181 Communication ICs FInput / output circuits BU8871F 182 Communication ICs FElectrical characteristics DC charact...


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