GENERAL DESCRIPTION

The PCD5032 is a CMOS device designed for use in Digital Enhanced Cordless Telephone systems (DECT), but also suitable for other cordless telephony applications such as CT2. The PCD5032 performs analog-to-digital and digital-to-analog conversion, ADPCM encoding and decoding compliant to CCITT recommendation “G.721 (blue book, 1988)”. The PCD5032 contains on-chip microphone and earpiece amplifiers. The device can be used in both handset and base station designs.

FEATURES

? G.721 compliant ADPCM encoding and decoding

? ‘Bitstream’ analog-to-digital and digital-to-analog conversion

? On-chip receive and transmit filter

? On-chip ringer and tone generator

? Programmable gain of receive and transmit path

? Serial ADPCM interface with independent timing for maximum flexibility

? Linear PCM data accessible for digital echo cancelling

? Programmable via I2C-bus interface

? Fast receiver mute input via pin

? On-chip reference voltage

? On-chip symmetrical supply for electret microphone

? Few external components

? Low power consumption in standby mode

? Low supply voltage (single supply 2.7 V up to 5.5 V)

? CMOS technology

? Minimized EMC on digital outputs.

APPLICATIONS

? Digital Enhanced Cordless Telephony (DECT)

? CT2 cordless

? Speech compression.