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MFG:ROHM  Package Cooled:DIP  

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Part Number: BU8872

 

MFG: ROHM

Package Cooled: DIP

 

Description: The BU8872 and BU8872FS are DTMF receiver ICs developed for use in telephone answering machines, and convert 16 differe...


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BU8872 General Description


The BU8872 and BU8872FS 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 (BU8872) or 16-pin SSOP (BU8872FS) 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 microcomputer.

BU8872 Maximum Ratings

Parameter
Symbol
Limits
Unit
Power supply voltage
VDD
7
V
Iutput voltage
VIN
GND-0.3~VDD+0.3
V
Output voltage
VOUT
GND-0.3~VDD+0.3
V
Power dissipation BU8872
Pd
500*1
mW
BU8872FS
650*2
Operating temperature
Topr
-40~+85
Storage temperature
Tstg
-55~+125

BU8872 Features

 Dynamic range of 45dB. (internal AGC)
 4-bit binary serial data output.
 Guard time can be controlled through host microcomputer.
 Input pins equipped with hysteresis. (ACK pin)
 4.19MHz ceramic resonator or crystal resonator can be used.
 8-pin DIP package. (BU8872)
    16-pin SSOP package. (BU8872FS)

BU8872 Typical Application

Telephone answering machines

BU8872 datasheet

BU8872
PDF/DataSheet Download

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