TP3094 Quad PCM Codec/Filter
April 2003
TP3094 COMBO Quad PCM Codec/Filter
General Description
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 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 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).
Features
Handles four voice channels Complete Codec and Filter system including:
- Transmit and receive channel filters - A-law or -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
Connection Diagram
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COMBO and TRI-STATE are registered trademarks of National Semiconductor Corporation
GXO0 VRO0 PT3 AVCC0 PT1 PCMMode PT2 TST TSX FSR0 FSX0
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85°C
AGND1 VXI2 GXO2 VRO2 NC VRO1 GXO1 VXI1 NF AGND0 VXI0 VXI3 GXO3 VRO3 AVCC1 PDN3 PDN2 PDN1 PDN0 A/Law MCLK DR
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 5 4 3 2 1 44 43 42 41 40 39 38 37 36
Order Number TP3094V See NS Package V44A
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TP3094
35 34 33 32 31 30 29
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

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