1.0 Pin Description
CX28331/CX28332/CX28333
1.1 Pin Assignments
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Table 1-2. CX2833i-3x Pin Definitions (1 of 8)
Pin #
Signal Name
Description
I/O/P
Notes
CX28331-3x CX28332-3x CX28333-3x
Coaxial Line Pins
17
—
18
—
—
—
7
—
7
RLINEP
RLINE1P
RLINEM
RLINE1M
RLINE2P
Ch1 positive
receive data
I
I
Differential inputs for each channel from its
respective receive coax line. The RX expects
balanced differential inputs, usually
achieved using a 1:1 transformer.
The inputs are internally DC biased to 1.9 V.
—
8
—
8
Ch1 negative
receive data
27
17
Ch2 positive
receive data
I
I
—
—
—
28
—
—
18
27
28
RLINE2M Ch2 negative
receive data
RLINE3P
Ch3 positive
receive data
I
RLINE3M Ch3 negative
receive data
I
12
—
13
—
—
—
2
—
2
TLINEP
TLINE1P
TLINEM
TLINE1M
TLINE2P
Ch1 positive
transmit data
O
Differential, coax-driver balanced outputs
for pulse-shaped AMI B3ZS/HDB3 encoded
waveforms for each channel.
—
3
—
3
Ch1 negative
transmit data
O
These pins should be connected to the
primary side of the 1:1 transformer through
two backmatch resistors (see Appendix B).
22
12
Ch2 positive
transmit data
O
O
O
O
—
—
—
23
—
—
13
22
23
TLINE2M
TLINE3P
TLINE3M
Ch2 negative
transmit data
Ch3 positive
transmit data
Ch3 negative
transmit data
1-14
Conexant
100985A
CONEXANT [ CONEXANT SYSTEMS, INC ]
