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T8531A Arkusz danych(PDF) 1 Page - Agere Systems

Numer części T8531A
Szczegółowy opis  T8531A/8532 Multichannel Programmable Codec Chip Set
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Producent  AGERE [Agere Systems]
Strona internetowa  http://www.agere.com
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Preliminary Data Sheet
September 2001
T8531A/T8532 Multichannel Programmable
Codec Chip Set
Features
s
Per-channel programmable gain and hybrid bal-
ance
s
Programmable termination impedances
s
Programmable
µ-law, A-law, or linear PCM output
s
Tone plant:
— DTMF generator
— DTMF receiver
— Caller ID generator
— Call progress tones generator
s
Test utilities:
— Automatic gain calibration
— Tone generation
— dc generation
— dc measurement
— Variance computation
— Peak detection
s
Analog and digital loopbacks
s
Programmable time-slot assignment with bit offset
s
Low-noise, balanced, receive SLIC interface
s
Few or no SLIC/codec interface components
required
s
Sigma-delta converters with dither noise reduction
s
Serial microcontroller control interface
s
Meets or exceeds ITU-T G.711—G.712 and rele-
vant
Telcordia Technologies
requirements
s
Available in 64-pin MQFP and TQFP packages
General Description
The multichannel programmable codec chip set is
comprised of the T8531A 16-channel line card signal
processor and one or two custom T8532 octal A/D
and D/A converters. A ROM-coded tone plant, with
line-test and self-test utilities, is included on the sig-
nal processor. Together these devices achieve a
highly integrated and highly programmable multi-
channel voice codec solution.
Software is provided to compute the gain and filter
coefficients required to program the codec.
5-3793i (F)
Figure 1. System Block Diagram
T8532
OCTAL
A/D
D/A
T8532
OCTAL
A/D
D/A
T8531A
DIGITAL
SIGNAL
PROCESSOR
VTX (8)
VRP (8)
VRN (8)
VTX (8)
VRP (8)
VRN (8)
2
3
2
3
CK16
VRTX (8)
VRTX (8)
PCM
INTERFACE
MICROPROCESSOR
INTERFACE
ASIC


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