DESCRIPTION

· The IDT821034 is a single-chip, four-channel PCM CODEC with on-chip filters and programmable gain.

· It supports both µ-Law and A-Law companding for digital-to-analog and analog-to-digital conversions, complying with ITU-T G.711 - G.714 specifications.

· The device includes digital filters for transmit and receive filtering in voice telephone circuits, interfacing with time-division multiplexed systems.

· It features a flexible PCM interface with software-selectable timing modes and independently programmable time slots for each channel.

· SLIC signaling functions are integrated and accessed via the Serial Control Interface.

FEATURES

· 4-channel CODEC with on-chip digital filters.

· Software-selectable A-law/µ-law companding.

· Programmable gain settings.

· Automatic master clock frequency selection: 2.048MHz, 4.096MHz, or 8.192MHz.

· Flexible PCM interface with up to 128 programmable time slots and data rates from 512 kbits/s to 8.192 Mbits/s.

· 5 SLIC signaling pins per channel.

· Flexible Serial Control Interface for microcontroller communication.

· Software-programmable timing modes.

· TTL and CMOS compatible digital I/O.

· Complies with ITU-T G.711 - G.714 requirements.

· Single +5V power supply.

· Low power consumption: 100mW typical.

· Operating temperature range: -40°C to +85°C.

· Available in 52-pin PQFP package.

APPLICATIONS

· Digital telecommunication systems such as PBX, Central Office Switch, Digital Telephone, and Integrated Voice/Data Access Unit.