CX28331/CX28332/CX28333
1.0 Pin Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
1.1 Pin Assignments
Table 1-1. CX2833i-1x Pin Definitions (1 of 6)
Pin #
Signal Name
Description
I/O/P
Notes
CX28331-1x CX28332-1x CX28333-1x
Coaxial Line Pins
14
—
15
—
—
—
6
—
6
RLINEP
RLINE1P
RLINEN
RLINE1N
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.
—
7
—
7
Ch1 negative receive
data
The inputs are internally DC biased
to 1.9 V.
22
14
Ch2 positive receive
data
I
I
—
—
—
23
—
—
15
22
23
RLINE2N Ch2 negative receive
data
RLINE3P
Ch3 positive receive
data
I
RLINE3N Ch3 negative receive
data
I
10
—
11
—
—
—
2
—
2
TLINEP
TLINE1P
TLINEN
TLINE1N
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).
18
10
Ch2 positive transmit
data
O
O
O
O
—
—
—
19
—
—
11
18
19
TLINE2N
TLINE3P
TLINE3N
Ch2 negative transmit
data
Ch3 positive transmit
data
Ch3 negative transmit
data
100985A
Conexant
1-5
CONEXANT [ CONEXANT SYSTEMS, INC ]
