U4030B

Features:

Microphone amplifier with
  Symmetrical input
  Privacy function
  Anticlipping
Built in ear protection
Power down input
Mute input
DTMF interface
Low line impedance during pulse dialing


Application

Standard telephone
Fax machine
Answering machine
Cordless telephone


Pinout




Specifications

Parameters	Symbol	Value	Unit
Line current (according to figure11)	IL	200	mA
DC line voltage	VL	16	V
Storage temperature range	Tstg	55 to +150
Junction temperature	Tj	150
Ambient temperature range	Tamb	25 to +65
Power dissipation, Tamb = 60   DIP20                                                      SO20	Ptot Ptot	820 640	mW mW

Description

The U4030B is an electronic speech circuit for standard and feature telephones. It replaces the hybrid transformer, earphone and microphone interface and the supply voltage generation for external components, e.g. dialer or microcomputers. Using the U4030B in telephone circuit designs can improve transmission quality and results in cost savings through shorter and more flexible design procedures. It reduces the amount of external components needed. The U4030B uses TEMIC's reliable bipolar technology and is offered in a SO20 package.