GENERAL DESCRIPTION

The Z87000/Z87L00 FHSS Cordless Telephone Transceiver/Controllers are expressly designed to implement a 900 MHz frequency hopping spread spectrum cordless telephone compliant with United States FCC regulations for unlicensed operation. The Z87000 and Z87L00 are distinct 5V and 3.3V versions, respectively, of the device. For the sake of brevity, all subsequent references to the Z87000 in this document also apply to the Z87L00, unless specifically noted.

FEATURES

■ Transceiver/Controller Chip Optimized for Implementation of 900 MHz Spread Spectrum Cordless Phone

– Adaptive Frequency Hopping

– Transmit Power Control

– Error Control Signaling

– Handset Power Management

– Support of 32 kbps ADPCM Speech Coding for High Voice Quality

■ DSP Core Acts as Phone Controller

– Zilog-Provided Embedded Transceiver Software to Control Transceiver Operation and Base StationHandset Communications Protocol

– User-Modifiable Software Governs Phone Features

■ Transceiver Circuitry Provides Primary Cordless Phone Communications Functions

– Digital Downconversion with Automatic Frequency Control (AFC) Loop

– FSK Demodulator

– FSK Modulator

– Symbol Synchronizer

– Time Division Duplex (TDD) Transmit and Receive Buffers

■ On-Chip A/D and D/A to Support 10.7 MHz IF Interface

■ Bus Interface to Z87010 ADPCM Processor

■ Static CMOS for Low Power Consumption

■ 3.0V to 3.6V, -20°C to +70°C, Z87L00

4.5V to 5.5V, -20°C to +70°C, Z87000

■ 16.384 MHz Base Clock