ICS1893AF Data Sheet - Release
Chapter 6 Interface Overviews
6.3.2 Twisted-Pair Receiver Interface
Figure 6-2 shows the design for the ICS1893AF twisted-pair receiver interface.
• Two 56.2Ω 1% resistors are in series, with the center bypassed to ground with a 0.1-µF bypass
capacitor.
• No bypass capacitor is used with the receive transformer center tap.
• A 4.7-pF capacitor must be included across the ICS1893AF side of the receive transformer.
Note:
1. Keep leads as short as possible.
2. Install the resistor network as close to the ICS1893AF as possible.
Figure 6-2. ICS1893AF Receiver Twisted Pair
System Ground Plane Chassis Ground Plane
SeparateGround
Plane
1:1
TP_RXP 18
56.2Ω 1%
Center
Tap
4.7 pF
To RJ-45
ICS1893AF
0.1 µF
56.2Ω 1%
TP_RXN 19
75Ω
0.1 µF 2 kV
ICS1893AF, Rev D 10/26/04
October, 2004
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
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