LXT970A Datasheet, PDF (1/74 Pages) Intel Corporation – Dual-Speed Fast Ethernet Transceiver

LXT970A
Dual-Speed Fast Ethernet Transceiver
Datasheet
The LXT970A is an enhanced derivative of the LXT970 10/100 Mbps Fast Ethernet PHY
Transceiver that supports selectable driver strength capabilities and link-loss criteria. The
LXT970A supports 100BASE-TX, 10BASE-T, and 100BASE-FX applications. It provides a
Media Independent Interface (MII) for easy attachment to 10/100 Media Access Controllers
(MAC)s and a pseudo-ECL interface for use with 100BASE-FX fiber networks.
The LXT970A supports full-duplex operation at 10 and 100 Mbps. Its operating condition is set
using auto-negotiation, parallel detection or manual control. The encoder may be bypassed for
symbol mode applications.
The LXT970A is fabricated with an advanced CMOS process and requires only a single 5V
power supply. The MII may be operated independently with either a 5V or a 3.3V supply.
Applications
s Combination 10BASE-T/100BASE-TX
Network Interface Cards (NICs)
s 10/100 Switches, 10/100 Printservers
Product Features
s 100BASE-FX Network Interface Cards
(NICs)
s IEEE 802.3 Compliant:
— 10BASE-T and 100BASE-TX using a
single RJ-45 connection.
— Supports auto-negotiation and parallel
detection for legacy systems.
— MII interface with extended register
capability.
s Robust baseline wander correction
performance.
s 100BASE-FX fiber optic capable.
s Standard CSMA/CD or full-duplex
operation.
s Configurable via MII serial port or external
control pins.
s Configurable for DTE or switch
applications.
s CMOS process with single 5Vsupply
operation
with provision for interface to 3.3V MII
bus.
s Integrated LED drivers.
s Integrated supply monitor and line
disconnect during low supply fault.
s Available in:
— 64-pin TQFP (LXT970ATC)
— 64-pin PQFP (LXT970AQC)
s Commercial temperature range (0 - 70^oC
ambient).
As of January 15, 2001, this document replaces the Level One document
LXT970A — Dual-Speed Fast Ethernet Transceiver.
Order Number: 249099-001
January 2001