The MC13109A integrates several of the functions required for a cordless telephone into a single integrated circuit. This significantly reduces component count, board space requirements, and external adjustments. It is designed for use in both the handset and the base.

• Dual Conversion FM Receiver

   – Complete Dual Conversion Receiver – Antenna Input to Audio Output 80 MHz Maximum Carrier Frequency

   – RSSI Output

   – Carrier Detect Output with Programmable Threshold

   – Comparator for Data Recovery

   – Operates with Either a Quad Coil or Ceramic Discriminator

• Compander

   – Expandor Includes Mute, Digital Volume Control and Speaker Driver

   – Compressor Includes Mute, ALC and Limiter

• Dual Universal Programmable PLL

   – Supports New 25 Channel U.S. Standard with No External Switches

   – Universal Design for Domestic and Foreign CT–0 Standards

   – Digitally Controlled Via a Serial Interface Port

   – Receive Side Includes 1st LO VCO, Phase Detector, and 14–Bit Programmable Counter and 2nd LO with 12–Bit Counter

   – Transmit Section Contains Phase Detector and 14–Bit Counter

   – MPU Clock Output Eliminates Need for MPU Crystal

• Supply Voltage Monitor

   – Externally Adjustable Trip Point

• 2.0 to 5.5 V Operation with One–Third the Power Consumption of Competing Devices