TEA1099

INTEGRATED CIRCUITS DATA SHEET TEA1099H Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer Product specification Supersedes data of 1998 Jun 11 File under Integrated Circuits, IC03 1999 Apr 08 Philips Semiconductors Product specification Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer FEATURES Line interface Low DC line voltage Voltage regulator with adjustable DC voltage Symmetrical high impedance inputs (70 kΩ) for dynamic, magnetic or electret microphones Dual Tone Multi-Frequency (DTMF) input with confidence tone on earphone and/or loudspeaker Receive amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain) AGC: Automatic Gain Control for true line loss compensation. Supplies Provides a strong 3.35 V regulated supply for microcontroller or dialler Provides filtered power supply, optimized according to line current and compatible with external voltage or current sources Filtered 2.0 V power supply output for electret microphone Compatible with a ringer mode Power-Down (PD) logic input for power-down. Handsfree Asymmetrical high-impedance input for electret microphone Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain Dynamic limiter on loudspeaker amplifier to prevent distortion Logarithmic volume control on loudspeaker amplifier via linear potentiometer Duplex controller consisting of: – Signal and noise env...