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CX28332

Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit

Conexant Systems 

CX28331/CX28332/CX28333

Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit

1.0 Pin Description

1.1 Pin Assignments

Table 1-1. CX2833i-1x Pin Definitions (1 of 6)

Pin #

Signal Name

CX28331-1x CX28332-1x CX28333-1x

Description

Coaxial Line Pins

14

—

—

RLINEP Ch1 positive receive

—

6

6

RLINE1P data

15

—

—

RLINEN Ch1 negative receive

—

7

data

7

RLINE1N

—

22

14

RLINE2P Ch2 positive receive

data

—

23

15

RLINE2N Ch2 negative receive

data

—

—

22

RLINE3P Ch3 positive receive

data

—

—

23

RLINE3N Ch3 negative receive

data

10

—

—

TLINEP Ch1 positive transmit

—

2

2

TLINE1P data

11

—

—

TLINEN Ch1 negative transmit

—

3

data

3

TLINE1N

—

18

10

TLINE2P Ch2 positive transmit

data

—

19

11

TLINE2N Ch2 negative transmit

data

—

—

18

TLINE3P Ch3 positive transmit

data

—

—

19

TLINE3N Ch3 negative transmit

data

I/O/P

Notes

I Differential inputs for each channel

from its respective receive coax

line. The RX expects balanced

I differential inputs, usually achieved

using a 1:1 transformer.

The inputs are internally DC biased

I to 1.9 V.

I

I

I

O Differential, coax-driver balanced

outputs for pulse-shaped AMI

B3ZS/HDB3 encoded waveforms

O for each channel.

These pins should be connected to

O the primary side of the 1:1

transformer through two

backmatch resistors (see Appendix

O B).

O

O

100985A

Conexant

1-5

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