xrt5997 Exar Corporation, xrt5997 Datasheet - Page 31

• Manufacturer Part Number: xrt5997
• Description: Xrt5997 -seven Channel E1 Line Interface Unit
• Manufacturer: Exar Corporation

APPLICATION INFORMATION
Figures 14, 15 and 16, provide example schematics on
how to interface Channel 1 of the XRT5997 device to
the line, under the following conditions.
·
Receiver is Transformer-coupled to a 75
unbalanced line.
Receiver is Transformer-coupled to a 120
balanced line.
Receiver is Capacitive-coupled to a 75
unbalanced line.
Figure 14. Illustration on how to interface Channel 1 (of the XRT5997 Device) to the Line
Loss of Signal - 1
Rev. 1.0.0
TxLineClk_1
RxPOS_1
RxNEG_1
TxPOS_1
TxNEG_1
(Receiver is Transformer-coupled to a 75 unbalanced line)
100
99
98
97
1
2
U1
XRT5997
TxPOS_1
TxNEG_1
TxClk_1
RxPOS_1
RxNEG_1
RxLOS_1
TRing_1
RRing_1
TTIP_1
RTIP_1
31
95
93
7
8
1
1
R1
9.1
R2
9.1
R3
18.7
2
2
1
4
1
4
1:2
PE-65835
1:2
PE-65835
5
8
5
8
XRT5997
1
1
J1
BNC
J2
BNC