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QUAD PCM CODEC WITH PROGRAMMABLE GAIN

FEATURES

● 4 channel CODEC with on-chip digital filters
● Software Selectable A-law/µ-law companding
● Programmable gain setting
● Automatic master clock frequency selection: 2.048MHz, 4.096MHz or 8.192MHz
● Flexible PCM interface with up to 128 programmable time slots, data rate from 512 kbits/s to 8.192 Mbits/s
● 5 SLIC signaling pins per channel
● Flexible Serial Control Interface to microcontroller
● Software programmable timing modes
● TTL and CMOS compatible digital I/O
● Meets or exceeds ITU-T G.711 - G.714 requirements
● +5 V single power supply
● Low power consumption: 100mW Typ.Operating temperature range: -40 °C to +85 °C
● Packages available: 52 pin PQFP

DESCRIPTION
    The IDT821034 is a single-chip, four channel PCM CODEC with on-chip filters and programmable gain setting. This device provides bothµ-Lawand A-Law companding digital-to-analog and analog-to-digitalconversions based on ITU-T G.711 - G.714 specifications. The digitalfilters in IDT821034 provides the necessary transmit and receive filteringfor voice telephone circuit to interface with time-division multiplexedsystems. 

     The IDT821034 has a flexible PCM interface with softwareselectable timing modes and independently programmable time slot foreach transmit and receive channel. It also integrates the SLIC signalingfunctions through internal registers. The CODEC and SLIC control/statusregisters are accessed via the Serial Control Interface.The IDT821034 can be used in digital telecommunication applicationssuch as PBX, Central Office Switch, Digital Telephone and Integrated Voice/Data Access Unit.