900 MHz Cordless Phone Baseband with Compander

Overview

The MC33411 900 MHz Analog Cordless Phone Baseband system is designed to fit the requirements of a 900 MHz analog cordless telephone system. Included are three PLLs (Phase–Locked Loops). Two are intended for use with external VCOs and 64/65 or 128/129 dual modulus prescalers, and can control the transmit and receive (LO1) frequencies for 900 MHz communication. The third PLL is configured as the 2nd local oscillator (LO2), and is functional to 80 MHz.

Archived content is no longer updated and is made available for historical reference only.

MoreLess

Features

Also included are muting, audio gain adjust (internal and external), low battery/carrier detect, and a wide range for the PLL reference frequency. The power supply range is 2.7 to 5.5 V. "A" version devices have programmable MCU clock out and reference oscillator disable functions, whereas these functions are always enabled for "B" version devices.

Complete Expander/Compressor for Superior Noise Rejection

Two PLLs and a LO Suitable for a 900 MHz System

Minimal External Components

Transmit Path Includes Adjustable Gain Amplifier, Filters, Mute, Compressor with Bypass and Limiter

Receive Path Contains Data Slicer, Adjustable Gain Amplifier, Sidetone Attenuator, Filters, Expander with Bypass, Mute, Volume Control and Power Amplifier

Dual A/Ds are Provided to Monitor RSSI and V_CC

Independent Power Amplifier with Differential Outputs and Mute

Selectable Frequency for Switched Capacitor Filters, PLLs and the LO

Reference Frequency Source can be a Crystal or System Clock

Serial µP Port to Control Gain, Mute, Frequency Selection, Phase Detector Gain, Power Down Modes, Low Battery Detect and Others

Power Supply Range: 2.7 to 5.5 V

Power Down Modes for Power Conservation

MoreLess

Features

Complete Expander/Compressor for Superior Noise Rejection

Two PLLs and a LO Suitable for a 900 MHz System

Minimal External Components

Transmit Path Includes Adjustable Gain Amplifier, Filters, Mute, Compressor with Bypass and Limiter

Receive Path Contains Data Slicer, Adjustable Gain Amplifier, Sidetone Attenuator, Filters, Expander with Bypass, Mute, Volume Control and Power Amplifier

Dual A/Ds are Provided to Monitor RSSI and V_CC

Independent Power Amplifier with Differential Outputs and Mute

Selectable Frequency for Switched Capacitor Filters, PLLs and the LO

Reference Frequency Source can be a Crystal or System Clock

Serial µP Port to Control Gain, Mute, Frequency Selection, Phase Detector Gain, Power Down Modes, Low Battery Detect and Others

Power Supply Range: 2.7 to 5.5 V

Power Down Modes for Power Conservation

Data Sheets

MC33411B: 900 MHz Cordless Phone Baseband with Compander ARCHIVED

Overview

Features

Features