ICS1893BKLF View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
MFG CO.
'ICS1893BKLF' PDF : 133 Pages View PDF
ICS1893BF Data Sheet - Release
Chapter 8 Pin Diagram, Listings, and Descriptions
Table 8-11. ICS1893BK Configuration Pins
Signal Name
Pin No.
REF_IN
47
REF_OUT
46
RESETn
17
Signals Description
Frequency Ref Input: 25MHz Clock or Crystal
Frequency Ref Output for Crystal
System Reset (active low)
8.3.2 Transformer Interface Pins
Transformer connections on the ICS1893BK signals TP_AP, TP_AN, TP_BP and TP_BN are shown in
Table 8-12. The previous TP_CT pin used on the ICS1893AF is not used with the ICS1893BK. 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 ICS1893BK.
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. ICS1893BK Transformer Interface Pins
Signal Name
Pin No.
Signals Description
TP_AP
4
Twisted Pair A Positive
TP_AN
5
Twisted Pair A Negative
TP_BP
9
Twisted Pair B Positive
TP_BN
8
Twisted Pair B Negative
ICS1893BF, Rev. C, 9/29/05
Copyright © 2005, Integrated Circuit Systems, Inc.
All rights reserved.
104
September, 2005
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