TEA1118A

INTEGRATED CIRCUITS DATA SHEET TEA1118; TEA1118A Versatile cordless transmisssion circuit Product specification Supersedes data of 1996 Nov 26 File under Integrated Circuits, IC03 1997 Jul 14 Philips Semiconductors Product specification Versatile cordless transmisssion circuit 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 transmit inputs (62.5 kΩ) with large signals handling capabilities [up to 1 V (RMS value) with less than 2% THD] Receive amplifier for dynamic, magnetic or piezoelectric earpieces AGC line loss compensation for transmit and earpiece amplifiers DTMF input with confidence tone (TEA1118A only) MUTE input for pulse or DTMF dialling (TEA1118A only) Transmit mute function, also enabling the DTMF input (TEA1118A only). APPLICATIONS Cordless telephone base stations Fax machines Answering machines. TEA1118; TEA1118A GENERAL DESCRIPTION The TEA1118 and TEA1118A are bipolar integrated circuits that perform all speech and line interface functions required in cordless telephone base stations. The ICs operate at a line voltage down to 1.6 V DC (with reduced performance) to facilitate the use of telephone sets connected in parallel. The TEA1118A offers in addition to the TEA1118 electronic switching between speech and dialling. Moreover the transmit amplifier can be disabled during speech condition by...