Product Brief
May 1998
LU3X51FT-J80 Single-Port
10/100 Ethernet Transceiver TX/FX
Overview
The LU3X51FT-J80 is a fully integrated 10/100 Mbit
physical layer device with transceiver. This part was
designed for 10/100 Mbit applications where board
space, cost, and power are at a premium and strin-
gent functional interoperability is a necessity. The
LU3X51FT-J80 is a powerful device for the forward
migration of legacy 10 Mbit products and non compli-
ant 100 Mbit devices. The LU3X51FT-J80 was
designed from the beginning to conform fully with all
pertinent specifications, 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
Single-chip integrated physical layer and trans-
ceiver for 10Base-T and/or 100Base-T functions
s
IEEE* 802.3 compatible 10Base-T and 100Base-T
physical layer interface and ANSI X3.263 TP-PMD
compatible transceiver
s
PECL interface for external FX transceiver
s
Built-in analog 10 Mbit receive filter, removing the
need for external filters
s
Built-in 10 Mbit transmit filter
*
IEEE
is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc.
s
10 Mbit PLL exceeding tolerances for both pream-
ble and data jitter
s
100 Mbit PLL, combined with the digital adaptive
equalizer, robustly handles variations in rise-fall
time, excessive attenuation due to channel loss,
duty-cycle distortion, cross talk, and baseline wan-
der
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
Selectable CIM, Class II support, and powerful MII
drivers for repeater applications
s
IEEE* 802.3u Clause 28 compliant auto negotia-
tion for full 10M and 100M control
s
Fully configurable via pins and management
accesses
s
Extended management support with interrupt
capabilities
s
PHY MIB support
s
Symbol mode option
s
Full LED support
s
Low-power CMOS implementation
s
80-pin QFP package
LU3X51FT-J80
Product Brief
Single-Port 10/100 Ethernet Transceiver TX/FX
May 1998
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. N o 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 1998 Lucent Technologies Inc.
All Rights Reserved
Printed in U.S.A.
May 1998
PN98-149LAN
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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1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
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Tel. (65) 778 8833, FAX (65) 777 7495
CHINA:
Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road,
Shanghai 200233 P. R. China Tel. (86) 21 6440 0468, ext. 316, FAX (86) 21 6440 0652
JAPAN:
Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
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Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 1189 324 299, FAX (44) 1189 328 148
Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Bracknell),
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ITALY: (39) 2 6601 1800 (Milan), SPAIN: (34) 1 807 1441 (Madrid)
LU3X51FT-J80 Block Diagram
TPTX+/-
FOTX+/-
TPRX+/-
FORX+/-
10/100-TX
PCS
CLOCK SYNTHESIS
10/100-TX
DRIVERS
AUTONEG
RX10
SQUELCH
ADAPTIVE EQUALIZER
Baseline Wander Correction
LEDS
MANAGEMENT
INTERFACE
REGISTER/
CONFIG/
CONTROL
TXD
TXEN
TXER
TXCLK
MIIENA
RXD
RXDV
MDIO
MDC
MDIOINT
RXER
RXCLK
COL/FCRS
CRS
MI
I
INT
E
R
F
AC
E L
O
G
I
C
10/100-RX
PCS
and RECOVERY
LEDs
FOSD+/-
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