TEA1113

INTEGRATED CIRCUITS DATA SHEET TEA1113 Low voltage versatile telephone transmission circuit with dialler interface Product specification Supersedes data of 1996 Feb 08 File under Integrated Circuits, IC03 1997 Mar 27 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 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 Dynamic limitation in the transmit direction to prevent distortion of the transmit line and sidetone signals AGC line loss compensation for microphone and earpiece amplifiers LED on-hook/off-hook status indication Microphone mute function available with switch. GENERAL DESCRIPTION APPLICATION TEA1113 Line powered telephone sets, cordless telephones, fax machines and answering machines. The TEA1113 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 perfo...