TP3094 Texas instruments

TP3094

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TP3094

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Описание

The TP3094 is a monolithic PCM Codec and Filter device implemented using a digital signal processing architecture. It provides four voice channels, combining transmit bandpass and receive low pass channel filters with companding Alaw or m-law PCM encoders and decoders. The device is fabricated using Nationals advanced CMOS process. The device includes anti-aliasing filters and sigma-delta converters dedicated to each channel,and by a common signal processing unit which performs all the remaining filtering and processingfor the four channels. The TP3094 includes a flexible PCM digital interface, which allows the device to be connected to PCM busses of different formats. It can also be connected with other TP3094 devices in a cascade fashion, for a system with up to 128 POTS interfaces (when a 2.048MHz PCM bus is used).

Handles four voice channels
Complete Codec and Filter system including:
- Transmit and receive channel filters
- A-law or µ-law companding encoder/decoder
Power down mode for low power consumption
Compatible to standard time division multiplexed PCM bus
- 8 bit mode, frame signal from external reference
- 32 bit mode, internal TSA, with consecutive TS
Up to 128 channels (32 devices) can be cascaded
Programmable functions (common for all 4 channels):
- A-law or µ-law
- Single MCLK clock,automatically selectable from 8.192MHz,
  4.096MHz, 2.048MHz and 1.536/1.544MHz
- Digital and Analog loopback test modes
Designed for CCITT and LSSGR applications
Single +5V power supply
44 lead PLCC surface mount package
Maximize line card circuit density
Use in Central Office, Loop Carrier, and PBX
equipment subscriber line and trunk cards
Wide operating temperature range –40°C to 85°C

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