T8531

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 m-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


Pinout

Specifications

Parameter	Symbol	Min	Max	Unit
Ambient Operating Temperature	TA	40	85	°C
Operating Junction Temperature	TJ	40	125	°C
Thermal Resistance, Junction to Case	RQJC	-	35	°C/W
Storage Temperature Range	Tstg	55	150	°C
Power Supply Voltage	VDD	4.75	5.25	V
Voltage on Any Pin with Respect to Ground	VSS	0.25	5.25	V
Package Power Dissipation	PD	-	1	W

Description

The Multichannel Programmable Codec Chip Set is comprised of the T8531 16-channel line card signal processor and one or two custom T8531 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.