LA8519M

• Allows switching between two anti-sidetone networks (near terminal/far terminal) depending on the line current, and thus achieves excellent sidetone characteristics over a wide range of line currents.
• Built-in transmitter/receiver amplifier driver power supply switching circuit allows communication using extension without power from the telephone network.
• The receiver amplifier supports both ceramic receivers (BTL) and dynamic receiver (single).
• Built-in power amplifier (load: 8 to 32 ): V_CC = 5 V, R_L = 8 , Pomax = 200 mW
• The power amplifier signal path includes an electronic volume control (7 steps of about 3.8 dB each)
• Includes a 10-input/9-output crosspoint switch that provides mixing functions for easy implementation of systems that support a diverse range of signal path switching functions.

The LA8519M is a cordless telephone base unit IC that provides I/O switching, voice signal processing, and other functions. It integrates, on a single chip, crosspoint switch, power amplifier, electronic volume and tone control, microphone amplifier, speech network, and other functions.