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Lucent Technologies Inc.

LU6612

Data Sheet

FASTCAT Single-FET for 10Base-T/100Base-TX

July 2000

Description

The LU6612 is a single-channel, single-chip complete

transceiver designed specifically for dual-speed

10Base-T and 100Base-TX repeaters and switches.

LU6612 implements:

The 10Base-T transceiver function of

IEEE 802.3u.

The physical coding sublayer (PCS) of

IEEE 802.3u.

The physical medium attachment (PMA) of

IEEE

802.3u.

Autonegotiation of

IEEE 802.3u.

MII management of

IEEE 802.3u.

Physical medium dependent (PMD) of

IEEE 802.3u.

This device supports operation over category 3

unshielded twisted-pair (UTP) cable, according to

IEEE

802.3u 10Base-T specification, and over category 5,

Type 1, UTP and Type 1 shielded twisted-pair cable,

according to

IEEE 802.3u 100Base-X specification.

Figure 1 illustrates a functional overview of the LU6612

while Figure 2 details the functions. Figure 3 shows

how the LU6612 interfaces to the twisted pair.

5-5600(F).r1

Figure 1. Functional Block Diagram: Device Overview

10 Mbits/s TRANSCEIVER

AUTONEGOTIATION

PMA

MUX

MANAGEMENT

PCS

DPLL

25 MHz

125 MHz

LSCLK

PMD

MII/SERIAL

INTERFACE

25 MHz

DRIVER AND FILTERS

DRIVER AND

FILTERS

20 MHz

TO/FROM

MAGNETICS

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