KSZ8091MLX Datasheet, PDF (1/72 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

KSZ8091MLX
10Base-T/100Base-TX
Physical Layer Transceiver
Revision 1.2
General Description
The KSZ8091MLX is a single-supply 10Base-T/100Base-
TX Ethernet physical layer transceiver for transmission
and reception of data over standard CAT-5 unshielded
twisted pair (UTP) cable.
The KSZ8091MLX is a highly-integrated, compact solution.
It reduces board cost and simplifies board layout by using
on-chip termination resistors for the differential pairs, by
integrating a low-noise regulator to supply the 1.2V core,
and by offering a flexible 1.8/2.5/3.3V digital I/O interface.
The KSZ8091MLX offers the Media Independent Interface
(MII) for direct connection with MII-compliant Ethernet
MAC processors and switches.
Energy Efficient Ethernet (EEE) provides further power
saving during idle traffic periods and Wake-on-LAN (WOL)
provides a mechanism for the KSZ8091MLX to wake up a
system that is in standby power mode.
The KSZ8091MLX is available in the 48-pin, lead-free
LQFP package (see Ordering Information).
Datasheets and support documentation are available on
website at: www.micrel.com.
Features
• Single-chip 10Base-T/100Base-TX IEEE 802.3
compliant Ethernet transceiver
• MII interface support
• Back-to-back mode support for a 100Mbps copper
repeater
• MDC/MDIO management interface for PHY register
configuration
• Programmable interrupt output
• LED outputs for link, activity and speed status indication
• On-chip termination resistors for the differential pairs
• Baseline wander correction
• HP Auto MDI/MDI-X to reliably detect and correct
straight-through and crossover cable connections with
disable and enable option
• Auto-Negotiation to automatically select the highest link-
up speed (10/100Mbps) and duplex (half/full)
• Energy Efficient Ethernet (EEE) support with low-power
idle (LPI) mode and clock stoppage for 100Base TX and
transmit amplitude reduction with 10Base-Te option
• Wake-On-LAN (WOL) support with either magic packet,
link status change, or robust custom-packet detection
• LinkMD^® TDR-based cable diagnostics to identify faulty
copper cabling
Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
August 31, 2015
Revision 1.2