XRT59L91ID View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT59L91ID' PDF : 28 Pages View PDF
Preliminary
XRT59L91
With input signal as described above, the XRT59L91
device will take each mark (which is provided to it via the
“Transmit Input Interface” block, and will generate a
pulse that complies with the pulse template, presented
in Figure 4 (when measured on the secondary-side of
the Transmit Output Transformer).
1.2 Interfacing the Transmit Section of the
XRT59L91 device to the Line
ITU-T G.703 specifies that the E1 line signal can be
transmitted over coaxial cable and terminated with 75W
or transmitted over twisted-pair and terminated with
120W .
In both applications (e.g., 75W or 120W ), the user is
advised to interface the Transmitter to the Line, in the
manner as depicted in Figures 5 and 6, respectively.
TxPO S
TxNEG
TxLineC lk
U
1
2
TxPO S
3
TxNEG
1
T x C lk
1
TTIP 3
R
1
1
2
9.
1
1
T R in g
5
R
1
2
2
9.
1
1:
12
5
4
8
PE-
65835
J
1
BN
C
1
XRT59L91
Figure 5. Illustration of how to interface the Transmit Section of the
XRT59L91 device to the Line (for “75W ” Applications)
Rev. P2.00
11
Share Link: 
