Preliminary Data Sheet

12/11/01

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Document

AC104X-DS00-405-R

Section 2: Pin Description

Many of the pins of these devices have multiple functions. Designate the multi-function pins by bolding the pin number.

Designers must assure that they have identified all modes of operation prior to final design.

The pin assignment shown below and in the pin description table is subject to change without notice. Contact Altima

Communications Inc. before implementing any design based on the information provided in this data sheet.

Signal types:

•

I = inputs

•

O = outputs

•

Z = high impedance

•

U = pull up

•

D = pull down

•

A = analog signal

•

* = Active Low Signal

•

NC = No Connect pin

Table 2:

MDI (Media Dependent Interface) Pins

Pin Name

Pin #

Type

Description

RXIN_TXON(A)

RXIN_TXON(B)

RXIN_TXON(C)

RXIN_TXON(D)

1

14

17

30

AI/O

AI/O

AI/O

AI/O

MDI: Receiver input Negative for both 10BASE-T and 100BASE-TX.

MDIX: Transmitter output Negative for both 10BASE-T and 100BASE-TX.

RXIP_TXOP(A)

RXIP_TXOP(B)

RXIP_TXOP(C)

RXIP_TXOP(D)

2

13

18

29

AI/O

AI/O

AI/O

AI/O

MDI: Receiver input Positive for both 10BASE-T and 100BASE-TX.

MDIX: Transmitter output Positive for both 10BASE-T and 100BASE-TX.

TXON_RXIN(A)

TXON_RXIN(B)

TXON_RXIN(C)

TXON_RXIN(D)

6

9

22

25

AI/O

AI/O

AI/O

AI/O

MDI: Transmitter output Negative for both 10BASE-T and 100BASE-TX.

MDIX: Receiver input Negative for both 10BASE-T and 100BASE-TX.

TXOP_RXIP(A)

TXOP_RXIP(B)

TXOP_RXIP(C)

TXOP_RXIP(D)

5

10

21

26

AI/O

AI/O

AI/O

AI/O

MDI: Transmitter output Positive for both 10BASE-T and 100BASE-TX.

MDIX: Receiver input Positive for both 10BASE-T and 100BASE-TX.