Product Description
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DESCRIPTION The IDT821054 is a feature rich, single-chip, programmable 4-channel PCM CODEC with on-chip filters. Besides the µ-Law/A-Law companding and linear coding/decoding (14 effective bits + 2 extra sign bits), the IDT821054 also provides 1 FSK generator for sending Caller-ID messages, 2 programmable tone generators per channel (which can generate ring signals) and 2 programmable chopper clocks for SLICs. FEATURES • 4-channel CODEC with on-chip digital filters • Software selectable A/µ-law, linear code conversion • Meets ITU-T G.711 - G.714 requirements • Programmable digital filters adaptingto system demands: - AC impedance matching - Transhybrid balance - Frequency response correction - Gain setting • Supports two programmable PCM buses • Flexible PCM interface with up to 128 programmable time slots, data rate from 512 kbits/s to 8.192 Mbits/s • MPI control interface • Broadcast mode for coefficient setting • 7 SLIC signaling pins (including 2 debounced pins) per channel • Fast hardware ring trip mechanism • 2 programmable tone generators per channel for testing, ringing and DTMF generation • 1 programmable FSK generator for sending Caller-ID messages • Two programmable chopper clocks • Master clock frequency selectable: 1.536 MHz, 1.544 MHz, 2.048 MHz, 3.072 MHz, 3.088 MHz, 4.096 MHz, 6.144 MHz, 6.176 MHz or 8.192 MHz • Advanced test capabilities: - 3 analog loopback tests - 5 digital loopback tests - Level metering function • High analog driving capability (300 Ω AC) • TTL/CMOS compatible digital I/O • CODEC identification • +5 V single power supply • Low power consumption • Operating temperature range: -40°C to +85°C • Package available: 64 Pin PQFP |
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