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.