Universal Cordless Telephone Subsystem IC

The MC13110A/B and MC13111A/B integrates several of the functions required for a cordless telephone into a single integrated circuit. This significantly reduces component count, board space requirements, external adjustments, and lowers overall costs. It is designed for use in both the handset and the base.

• MC13110A and MC13111A: Fully Programmable in all Power Modes

• MC13110B and MC13111B: MPU Clk Out and Second Local Oscillator are “Always On”. There is No Inactive Mode

• Dual Conversion FM Receiver

– Complete Dual Conversion Receiver – Antenna Input to Audio Out 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

– Expander Includes Mute, Digital Volume Control, Speaker Driver, Programmable Low Pass Filter, and Gain Block

– Compressor Includes Mute, Programmable Low Pass Filter, Limiter, and Gain Block

• MC13110A/B only: Frequency Inversion Scrambler

– Function Controlled via MPU Interface

– Programmable Carrier Modulation Frequency

• Dual Universal Programmable PLL

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

– Universal Design for Domestic and Foreign Cordless Telephone 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 Outputs Eliminates Need for MPU Crystal

• Low Battery Detect

– Provides Two Levels of Monitoring with Separate Outputs

– Separate, Adjustable Trip Points

• 2.7 to 5.5 V Operation (15 µA Current Consumption in Inactive Mode)

• AN1575: Refer to this Application Note for a List of the “Worldwide Cordless Telephone Frequencies