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