BU8872FS

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)


Application

Telephone answering machines


Specifications

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

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.