KSZ8051MNL/RNL
10Base-T/100Base-TX
Physical Layer Transceiver
General Description
Features
The KSZ8051 is a single supply 10Base-T/100Base-TX
•
Single-chip 10Base-T/100Base-TX IEEE 802.3
Ethernet physical layer transceiver for transmission and
compliant Ethernet Transceiver
reception of data over standard CAT-5 unshielded twisted
•
MII Interface support (KSZ8051MNL)
pair (UTP) cable.
•
RMII v1.2 Interface support with 50MHz reference clock
The KSZ8051 is a highly integrated, compact solution. It
output to MAC, and option to input 50MHz reference
reduces board cost and simplifies board layout by using
clock (KSZ8051RNL)
on-chip termination resistors for the differential pairs and
•
Back-to-Back mode support for 100Mbps copper
by integrating a low noise regulator to supply the 1.2V
repeater or media converter
core.
•
MDC/MDIO Management Interface for PHY register
The KSZ8051MNL offers the Media Independent Interface
configuration
(MII) and the KSZ8051RNL offers the Reduced Media
•
Programmable interrupt output
Independent Interface (RMII) for direct connection with MII/
•
LED outputs for link, activity and speed status indication
RMII compliant Ethernet MAC processors and switches.
•
On-chip termination resistors for the differential pairs
A 25MHz crystal is used to generate all required clocks,
including the 50MHz RMII reference clock output for the
•
Baseline Wander Correction
KSZ8051RNL.
•
HP Auto MDI/MDI-X for reliable detection and
The KSZ8051 provides diagnostic features to facilitate
correction for straight-through and crossover cables
system bring-up and debugging in production testing and
with disable and enable option
in product deployment. Parametric NAND tree support
•
Auto-negotiation to automatically select the highest link
enables fault detection between KSZ8051 I/Os and board.
up speed (10/100 Mbps) and duplex (half/full)
Micrel LinkMD
®
TDR-based cable diagnostics permit
•
Power down and power saving modes
identification of faulty copper cabling.
•
LinkMD
®
TDR-based cable diagnostics for identification
The KSZ8051MNL and KSZ8051RNL are available in 32-
of faulty copper cabling
pin, lead-free QFN packages (See Ordering Information).
•
Parametric NAND Tree support for fault detection
Data sheets and support documentation can be found on
between chip I/Os and board.
Micrel’s web site at: www.micrel.com.
____________________________________________________________________________________________________________
Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2010
M9999-070910-1.0
MICREL [ MICREL SEMICONDUCTOR ]
