ICS1893 datasheet(105/152 Pages) ICST

105 / 152 page

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1893 Rev C 6/6/00

June, 2000

105

ICS1893 - Release

9.3

ICS1893 Pin Descriptions

The tables in this section list the ICS1893 pins by their functional grouping.

9.3.1

Transformer Interface Pins

Table 9-2 lists the pins for the transformer interface group of pins.

Table 9-2.

Transformer Interface Pins

Name

Number

Type

Pin Description

TP_RXN

Input

Twisted-Pair Receive (Data) Negative.

Within this table, see the description at the TP_RXP pin.

TP_RXP

Input

Twisted-Pair Receive (Data) Positive.

Data reception of differential analog signals occurs over the TP_RXN

and TP_RXP pair of differential-signal pins. Together these pins

receive the serial bit stream from the UTP cable through an isolation

transformer.

Depending on the operating mode of the remote link partner, the

received data is one of the following types of signals:

• Two-level 10Base-T (that is, Manchester-encoded) signals

• Three-level 100Base-TX, (that is, MLT-3 encoded) signals

The TP_RXN and TP_RXP pins interface directly to an isolation

transformer, which in turn, interfaces with the UTP cable.

TP_TXN

Output

Twisted-Pair Transmit (Data) Negative.

Within this table, see the description at the TP_TXP pin.

TP_TXP

Output

Twisted-Pair Transmit (Data) Positive.

Differential analog signal transmission occurs over the TP_TXN and

TP_TXP pair of pins. Together these pins drive the serial bit stream

over the UTP cable.

Depending on the operating mode of the ICS1893 MDI, the

current-driven differential driver produces one of the following types of

signals:

• Two-level 10Base-T (that is, Manchester-encoded) signals

• Three-level 100Base-T (that is, MLT-3 encoded) signals

The TP_RXN and TP_RXP pins interface directly to an isolation

transformer, which in turn, drives the UTP cable.

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