CX28331 datasheet(15/68 Pages) CONEXANT

15 / 68 page

CX28331/CX28332/CX28333

1.0 Pin Description

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

1.1 Pin Assignments

100985A

Conexant

1-5

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

——

RLINEP

Ch1 positive receive

data

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.

—

RLINE1P

——

RLINEN

Ch1 negative receive

data

—

RLINE1N

—

RLINE2P

Ch2 positive receive

data

—

RLINE2N

Ch2 negative receive

data

——

RLINE3P

Ch3 positive receive

data

——

RLINE3N

Ch3 negative receive

data

——

TLINEP

Ch1 positive transmit

data

Differential, coax-driver balanced

outputs for pulse-shaped AMI

B3ZS/HDB3 encoded waveforms

for each channel.

These pins should be connected to

the primary side of the 1:1

transformer through two

backmatch resistors (see Appendix

B).

—

TLINE1P

——

TLINEN

Ch1 negative transmit

data

—

TLINE1N

—

TLINE2P

Ch2 positive transmit

data

—

TLINE2N

Ch2 negative transmit

data

——

TLINE3P

Ch3 positive transmit

data

——

TLINE3N

Ch3 negative transmit

data

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