Product Brief
June 1999
LU3X34FT
Quad 3 V 10/100 Ethernet Transceiver TX/FX
Overview
The LU3X34FT is a fully integrated 4-port
10/100 Mbits/s physical layer device with transceiver.
This part was designed specifically for
10/100 Mbits/s switches. These applications typically
require stringent functionality in addition to very tight
board space, power, and cost requirements. The
LU3X34FT supports MII interface. The LU3X34FT
was designed to conform fully with all pertinent spec-
ifications, from the ISO/IEC 11801 and EIA/TIA 568
cabling guidelines to ANSI X3.263
TP-PMD to
IEEE
* 802.3 ethernet specifications.
Features
s
4-port, single-chip integrated physical layer and
transceivers for 10Base-T, 100Base-TX, or
100Base-FX functions
s
IEEE
802.3 compatible 10Base-T and 100Base-T
physical layer interface and ANSI X3.263 TP-PMD
compatible transceiver
s
Interface support for MII
s
Autonegotiation pin configurability on a per-port
basis
s
Combined TX, 10Base-T, FX drivers, receivers,
and signal detect circuit
s
Built-in, analog 10 Mbits/s receive filter, removing
the need for external filters
s
Built-in 10 Mbits/s transmit filter
s
10 Mbits/s PLL exceeding tolerances for both pre-
amble and data jitter
s
100 Mbits/s PLL, combined with the digital adap-
tive equalizer, robustly handles variations in rise-
fall time, excessive attenuation due to channel
loss, duty-cycle distortion, crosstalk, and baseline
wander
s
Transmit rise-fall time manipulated to provide lower
emissions, amplitude fully compatible for proper
interoperability
s
Programmable scrambler seed for better FCC
compliancy
s
IEEE
802.3u Clause 28 compliant autonegotiation
for full 10 Mbits/s and 100 Mbits/s control
s
Extended management support with interrupt
capabilities
s
PHY MIB support
s
Low-power, 480 mA max
s
Low-cost, 160-PQFP packaging
*
IEEE
is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc.
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.
Copyright 1999 Lucent Technologies Inc.
All Rights Reserved
June 1999
PN99-113LAN
For additional information, contact your Microelectronics Group Account Manager or the following:
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E-MAIL: docmaster@micro.lucent.com
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ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
Tel. (65) 778 8833, FAX (65) 777 7495
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200233 P. R. China Tel. (86) 21 6440 0468, ext. 316, FAX (86) 21 6440 0652
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Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
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LU3X34FT Product Brief
Quad 3 V 10/100 Ethernet Transceiver TX/FX June 1999
Description
5-7907(F).r1
Figure 1. Block Diagram
INTRZ
PORTS[0:3]
LED OUTPUTS
MDC
MDIO
RX
TX
GLOBAL
INTERRUPT
REF_CLK
10BASE-T 100BASE-X
PCS PCS
LED
S
REGISTERS
MANAGEMENT
CONTROL
AUTONEG/
LINK
10/100
10M/100M CLOCK
RECOVERY
CLOCK
SQUELCH/SIG_
SYNTHESIS
CONFIGURATION
P3 P2 P1 P0
MII
DETECT,
BLW CORRECTION,
ADAPTIVE EQ.
TRANSMIT
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