1893AFILFT IDT, 1893AFILFT Datasheet - Page 46
1893AFILFT
Manufacturer Part Number
1893AFILFT
Description
Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
Manufacturer
IDT
Datasheet
1.1893AFLF.pdf
(136 pages)
Specifications of 1893AFILFT
Rohs
yes
Part # Aliases
ICS1893AFILFT
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7.4.7 100Base-TX Operation: Auto Polarity Correction
7.4.8 100Base-TX Operation: Isolation Transformer
ICS1893AF, Rev D 10/26/04
The ICS1893AF can sense and then automatically correct a signal polarity that is reversed on its
Twisted-Pair Receiver inputs. A signal polarity reversal occurs when the input signals on the TP_RXP and
TP_RXN pins are crossed or swapped (a problem that can occur during network installation or wiring). This
function is primarily a 10Base-T function, however, it is also active during Auto-Negotiation. For more
information on the 10Base-T Auto Polarity Correction, see
Polarity Correction”
The ICS1893AF interfaces with a medium through isolation transformers. The PHY requires two isolation
transformers: one for its Twisted-Pair Transmitter and the other for its Twisted-Pair Receiver. These
isolation transformers provide both physical isolation as well as the means for coupling a signal between
the ICS1893AF and the medium for both 10Base-T and 100Base-TX operations.
Note:
ICS1893AF Data Sheet - Release
For information on isolation transformers (also referred to as magnetic modules), see
“Twisted-Pair
Interface”.
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
46
Section 7.5.13, “10Base-T Operation: Auto
Chapter 7 Functional Blocks
October, 2004
Section 6.3,
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