LU6612
Data Sheet
July 2000
FASTCAT Single-FET for 10Base-T/100Base-TX
■ Autonegotiation of IEEE 802.3u.
■ MII management of IEEE 802.3u.
Description
The LU6612 is a single-channel, single-chip complete
transceiver designed specifically for dual-speed
10Base-T and 100Base-TX repeaters and switches.
■ 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.
LU6612 implements:
■ The 10Base-T transceiver function of IEEE 802.3u.
■ The physical coding sublayer (PCS) of IEEE 802.3u.
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.
■ The physical medium attachment (PMA) of IEEE
802.3u.
MANAGEMENT
MII/SERIAL
TX
PMA
PMD
INTERFACE
PCS
DRIVER AND
FILTERS
AUTONEGOTIATION
25 MHz
LSCLK
125 MHz
DPLL
TO/FROM
25 MHz
MAGNETICS
20 MHz
10 Mbits/s TRANSCEIVER
MUX
DRIVER AND FILTERS
5-5600(F).r1
Figure 1. Functional Block Diagram: Device Overview
4
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
