TEA1110A

INTEGRATED CIRCUITS DATA SHEET TEA1110A Low voltage versatile telephone transmission circuit with dialler interface Product specification Supersedes data of 1996 Nov 26 File under Integrated Circuits, IC03 1997 Apr 22 Philips Semiconductors Product specification Low voltage versatile telephone transmission circuit with dialler interface FEATURES Low DC line voltage; operates down to 1.6 V (excluding voltage drop over external polarity guard) Voltage regulator with adjustable DC voltage Provides a supply for external circuits Symmetrical high impedance inputs (64 kΩ) for dynamic, magnetic or piezo-electric microphones Asymmetrical high impedance input (32 kΩ) for electret microphones DTMF input with confidence tone MUTE input for pulse or DTMF dialling Receiving amplifier for dynamic, magnetic or piezo-electric earpieces AGC line loss compensation for microphone and earpiece amplifiers. GENERAL DESCRIPTION APPLICATION TEA1110A Line powered telephone sets, cordless telephones, fax machines, answering machines. The TEA1110A is a bipolar integrated circuit that performs all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between speech and dialling. The IC operates at a line voltage down to 1.6 V DC (with reduced performance) to facilitate the use of telephone sets connected in parallel. All statements and values refer to all versions unless otherwise specified. QUICK REFERENCE DATA Iline...