Intel
LXT9761/81,
LXT9762/82 and LXT9763
10/100BASE Hex/Octal Ethernet Transceivers
Product Overview
With the proliferation of PCs and other Internet
appliances, the need for faster data transmission
is becoming more and more of a necessity. Intel,
a leader in Fast Ethernet technology, offers
low-power, single-chip Hex/Octal 10BASE-T
and 100BASE-TX/FX PHY products, bringing
robust Cable Discharge Event (CDE) performance
to networking systems such as switches and
multi-port Network Interface Cards (NICs).
The five transceivers in this product family,
LXT9761, LXT9781, LXT9762, LXT9782, and
LXT9763, are advanced 6-port and 8-port PHY
transceivers incorporating Intel's Optimal Signal
Processing (OSP) architecture. OSP is an ideal
combination of digital signal processing and
analog design techniques developed to improve
die size, power consumption, performance, relia-
bility, and testability.
Through this architecture, an Intel Hex/Octal
10/100BASE PHY provides low-power copper
and fiber optic Ethernet connectivity. Interfaces
available in this product family include the standard
Media Independent Interface (MII), Serial MII
(SMII), and Reduced MII (RMII), allowing switch
ASIC designs to take advantage of low pin-count
PHY interfaces.
The Intel family of 10/100BASE Hex/Octal
Ethernet transceivers can provide significant
savings for high-density switch and router appli-
cations. With one of the broadest Ethernet product
lines in the industry, Intel stands ready to deliver
the 10Mbps, 100Mbps and 1000Mbps devices
OEMs require to meet their customers' needs.
product brief
www.intel.com/
design/network
Intel
Internet Exchange
Architecture
Product
Ports
Interface
Package
LXT9761
6
RMII (3.3/2.5V)
208 PQFP
LXT9781
8
RMII (3.3/2.5V)
208 PQFP &
272 PBGA
LXT9762
6
SMII (3.3/2.5V)
208 PQFP
LXT9782
8
SMII (3.3/2.5V)
208 PQFP &
272 PBGA
LXT9763
6
MII (3.3/2.5V)
208 PQFP
LXT976x/8x Family of Advanced Multi-Port
Fast Ethernet Transceivers
PORT 0
PORTS 17
10
3
100
Per-Port Functions
8 Port Global Functions
10
100
Management/
Mode Select
Logic & LED
Drivers
Clock
Generator
TX PCS
2
2
2
RX PCS
LED
n_<2:0>
TXD
n
MDINT
MDC
MDIO
RESET
TPFOP
n
TPFON
n
TPFIP
n
TPFIN
n
Fiber
Select
n
PWRDN
REFCLK
SYNC (SMII only)
ADD_<4.0>
RMII/SMII Contr
RXD
n
100TX
TP
Driver
Management/
Mode Select
Logic & LED
Drivers
Clock
Generator
TX PCS
RX PCS
100TX
TP
Driver
+
+
+
+
+
Management/
Mode Select
Logic & LED
Drivers
Clock
Geerator
TX PCS
RX PCS
TP
Driver
Management/
Mode Select
Logic & LED
Drivers
Management/
Mode Select
Logic & LED
Drivers
Carrier Sense
Data Valid
Error Detect
Management
Counters
Register Set
Port LED
Drivers
Clock
Generator
Pulse
Shaper
Clock
Generator
TX PCS
Serial-to-
Parallel
Converter
Parallel/
Serial
Converter
Manchester
Decoder
Decoder &
Descrambler
Decoder &
Descrambler
Adaptive EQ with BL
Wander Cancellation
Manchester
Decoder
CIM
Auto
Negotiation
Media
Select
Register Set
RX PCS
100TX
TP
Driver
ECL
Driver
100FX
Slicer
TP/
Fiber In
TP/
Fiber Out
10BT
LXT9761/81 LXT9762/82 and LXT9763 Block Diagram
Order Number: 248915-001 Printed in USA/0101/1K/ASI/CR
Intel
Internet Exchange Architecture
Copyright 2001 Intel Corporation
Intel Access
Developer's Site
developer.intel.com
Intel Internet Exchange Architecture Home Page
www.intel.com/IXA
Networking Components Home Page
developer.intel.com/design/network
Other Intel Support:
developer.intel.com/design/litcentr
Intel Literature Center
(800) 548-4725 7 a.m. to 7 p.m. CST (U.S. and Canada)
International locations please contact your local sales office.
General Information Hotline
(800) 628-8686 or (916) 356-3104 5 a.m. to 5 p.m. PST
Intel
Internet Exchange Architecture (IXA) is an
end-to-end family of high-performance, flexible and
scalable hardware and software development building
blocks designed to meet the growing performance
requirements of today's networks. Based on programmable
silicon and software building blocks, Intel
IXA solutions
enable faster development, more cost-effective deployment,
and future upgradability of network and communications
systems. Additional information can be found at
www.intel.com/IXA.
s
Helps simplify designs
Reduces board space
Reduces system cost
s
Helps reduce manufacturing and system costs
s
Helps reduce system cost and power
System design using only 3.3V
3.3 and 2.5V interfaces available
s
Provides system design flexibility
Legacy compliance
Lower pin count interface
Lowest pin count interface
s
Offers consistent error-free performance
s
Helps maximize line-operating conditions
s
Utilizes 100BASE-FX fiber optic cable
s
Provides added functionality
s
Provides for per-port activity/collision indicator
s
Enables simultaneous data transmit/receive
s
6 or 8 independent 10/100 ports
s
Low-cost standard PQFP Package
s
Very low power
3.3V operation
2.5V interface option
s
Multiple interfaces
Media Independent Interface (MII)
Reduced MII
Serial MII
s
Baseline wander correction
s
Auto negotiation/parallel detection
s
PECL interface
s
Extended register capability
s
Configurable LED drivers
s
10/100Mbps full duplex operation
Features
Benefits
For more information, visit the Intel Web site at:
developer.intel.com
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Intel Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Intel product. No other circuit
patent licenses are implied. Information contained herein supersedes previously published specifications on these devices from Intel.
*Other brands and names are the property of their respective owners.
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