DESCRIPTION:
The IDT821034 is a single-chip, four channel PCM CODECwith onchip filters and programmable gain setting. This device provides both m-Law and A-Law companding digital-to-analog and analog-to-digital conversions based on ITU-T G.711 - G.714 specifications. The digital filters in IDT821034 provides the necessary transmit and receive filtering for voice telephone circuit to interface with time-division multiplexed systems.

FEA TURES:
• 4 channel  CODEC with on-chip digital filters
• Software Selectable A-law/m-law companding
• Programmable gain setting
• Automatic master clock frequency selection: 2.048MHz, 4.096 MHz 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