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參數(shù)資料
| 型號： | T7531A |
| 廠商： | Lineage Power |
| 元件分類： | Codec |
| 英文描述： | 16-Channel Programmable Codec Chip Set(十六通道可編程編解碼器芯片組) |
| 中文描述： | 16通道可編程解碼器芯片組（十六通道可編程編解碼器芯片組） |
| 文件頁數(shù)： | 1/44頁 |
| 文件大小： | 772K |
| 代理商： | T7531A |
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Data Sheet
February 1999
T7531A/T7536 16-Channel Programmable
Codec Chip Set
Features
I
Single 5 V power supply operation
I
Per-channel programmable transmit gain
— 19.4 dB range, better than 0.01 dB steps
I
Per-channel programmable receive gain
— 25.4 dB range, better than 0.01 dB steps
I
Per-channel programmable internal balance
networks
I
Programmable termination impedances
I
Per-channel programmable
μ
-law, A-law, or linear
PCM output
I
Automatic gain calibration
I
Advanced board- and self-test capability
I
Programmable time-slot assignment
I
Data rate of 2.048 MHz or 4.096 MHz
I
Differential transmit amplifiers
I
Single-ended or differential receive amplifiers
I
Analog and digital loopbacks
I
Sigma-delta converters with dither noise reduction
I
Serial microcontroller control interface
I
JTAG test port
General Description
The T7531A is a custom, 16-channel line card signal
processor which, together with a pair of custom
T7536 octal A/D and D/A converters, comprises a
low-cost, highly programmable voice codec that is
compatible with all worldwide POTS lines.
Transmit and receive gains and hybrid balance coeffi-
cients are programmable per channel. Termination
impedance is programmable per chip set. These
functions, as well as time-slot assignment, calibra-
tion, and board test, are controlled via a microcontrol-
ler interface.
The DSP engine in the T7531A can be used to test
the line card. When voice processing is not required,
the spare processing time can be allocated on a per-
line basis to a suite of user-controlled board-test rou-
tines. Providing intelligent board-test functionality at
the line-card level frees the switch from having to per-
form test and error diagnosis tasks.
5-3793.c (F)
Figure 1. System Block Diagram
T7536
OCTAL
A/D
D/A
T7536
OCTAL
A/D
D/A
T7531A
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
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