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TP3094V
COMBO Quad PCM Codec/Filter
TP3094 COMBO®
Quad PCM Codec/FilterFebruary 2000
General DescriptionThe TP3094 is a monolithic PCM Codec and Fil-
ter device implemented using a digital signal pro-
cessing architecture. It provides four voice
channels, combining transmit bandpass and re-
ceive 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 sig-
ma-delta converters dedicated to each channel,
and by a common signal processing unit which
performs all the remaining filtering and process-
ing for the four channels.
The TP3094 includes a flexible PCM digital inter-
face, which allows the device to be connected to
PCM busses of different formats. It can also be
connected with other TP3094 devices in a cas-
cade 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 μ-law companding encoder/decoder Power down mode for low power consumption Compatible to standard time division multi-
plexed 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 cas-
caded 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
Connection DiagramOrder Number TP3094V
TP3094 6 5 4 3 2 1 44 43 42 41 40
18 19 20 21 22 23 24 25 26 27 28
AGND1
VXI2
GXO2
VRO2
VRO1
GXO1
VXI1
AGND0
VXI0
FSR1
FSX1
FSR2
FSX2
FSR3
FSX3
DVCC
DGND
PT4
See NS Package V44A
