IDTICS1893CFLFT IDT, Integrated Device Technology Inc, IDTICS1893CFLFT Datasheet - Page 97
IDTICS1893CFLFT
Manufacturer Part Number
IDTICS1893CFLFT
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.IDTICS1893CFLFT.pdf
(127 pages)
Specifications of IDTICS1893CFLFT
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8.3.2 Transformer Interface Pins
ICS1893CF, Rev. J, 08/11/09
Table 8-11. ICS1893CK Configuration Pins
Transformer connections on the ICS1893CK signals TP_AP, TP_AN, TP_BP and TP_BN are shown in
Table 8-12. The previous TP_CT pin used on the ICS1893CF is not used with the ICS1893CK. The typical
Twisted Pair Transformers connections are shown in Chapter 5. The transformer must be 1:1 ratio and
symetrical for 10/100 MDI/MDIX applications since the transmit twisted pair and receive twisted pair are
interchangeable. ICS1893 PHYs do not have power connections to the Transformer. All transformer power
is supplied by the ICS1893CK.
Note the twisted pairs are polarity sensitive and must connect to the RJ45 with the same polarity as shown
in the figure. Pay particular attention to polarity of the the “B” pair being reversed in pad sequence.
Table 8-12. ICS1893CK Transformer Interface Pins
Signal Name
Signal Name
REF_OUT
RESETn
ICS1893CF Data Sheet Rev. J - Release
REF_IN
TP_AN
TP_BN
TP_AP
TP_BP
Copyright © 2009, Integrated Device Technology, Inc.
Pin No.
Pin No.
47
46
17
4
5
9
8
All rights reserved.
97
Signals Description
Frequency Ref Input: 25MHz Clock or Crystal
Frequency Ref Output for Crystal
System Reset (active low)
Twisted Pair A Negative
Twisted Pair B Negative
Signals Description
Twisted Pair A Positive
Twisted Pair B Positive
Chapter 8 Pin Diagram, Listings, and Descriptions
August, 2009
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