TP3094  Product Folder

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 A-law or m-law PCM encoders and decoders. The device is fabricated using National's 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 processing for the four channels.

The TP3094 QuadCOMBO 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 m-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 m-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