General Description
The Multichannel Programmable Codec Chip Set is comprised of the T8531 16-channel line card signal processor and one or two custom T8532 octal A/D and D/A converters. A ROM-coded tone plant is included on the signal processor. Together these devices achieve a highly integrated and highly programmable multichannel voice codec solution.
Software is provided to compute the gain and filter coefficients required to program the codec.

FEATUREs
■ Single 5 V power supply operation
■ Per-channel programmable transmit gain
   — 25.6 dB range, better than 0.01 dB steps
■ Per-channel programmable receive gain
   — 17.8 dB range, better than 0.01 dB steps
■ Per-channel programmable hybrid balance
■ Programmable termination impedances
■ Programmable µ-law, A-law, or linear PCM output
■ DTMF generator
■ DTMF receiver
■ Caller ID generator
■ Call progress tones generator
■ Automatic gain calibration
■ Programmable time-slot assignment with bit offset
■ Low-noise, balanced, receive SLIC interface
■ Few or no SLIC/codec interface components required
■ Analog and digital loopbacks
■ Sigma-delta converters with dither noise reduction
■ Serial microcontroller control interface
■ Available in 64-pin MQFP and TQFP packages