TP3094 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – Quad PCM Codec/Filter

February 2000
TP3094 COMBO^®
Quad PCM Codec/Filter
General Description
The 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).
Connection Diagram
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
AGND1
VXI2
GXO2
VRO2
NC
VRO1
GXO1
VXI1
NF
AGND0
VXI0
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
10
36
11
35
12
TP3094
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
DX
DGND
PT4
DVCC
FSX3
NC
FSR3
FSX2
FSR2
FSX1
FSR1
Order Number TP3094V
See NS Package V44A
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