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Micrel Semiconductor
Micrel Semiconductor

KSZ8031RNL Datasheet Preview

KSZ8031RNL Datasheet

10Base-T/100Base-TX PHY

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KSZ8031RNL pdf
KSZ8021RNL / KSZ8031RNL
10Base-T/100Base-TX PHY
with RMII Support
General Description
Features
The KSZ8031RNL 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 KSZ8031RNL 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 1.8/2.5/3.3V digital I/O interface support.
The KSZ8031RNL offers the Reduced Media Independent
Interface (RMII) for direct connection to RMII-compliant
MACs in Ethernet processors and switches.
As the power-up default, the KSZ8031RNL uses a 25MHz
crystal to generate all required clocks, including the
50MHz RMII reference clock output for the MAC. The
KSZ8021RNL is the version that takes in the 50MHz RMII
reference clock as the power-up default.
To facilitate system bring-up and debugging in production
testing and in product deployment, parametric NAND tree
support enables fault detection between KSZ8031RNL
I/Os and board, while Micrel’s LinkMD® TDR-based cable
diagnostics permit identification of faulty copper cabling.
The KSZ8031RNL and KSZ8021RNL are available in 24-
pin, lead-free QFN packages (see Ordering Information).
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Single-chip 10Base-T/100Base-TX IEEE 802.3
compliant Ethernet Transceiver
RMII v1.2 Interface support with 50MHz reference clock
output to MAC, and option to input 50MHz reference
clock
RMII back-to-back mode support for 100Mbps copper
repeater or media converter
MDC/MDIO Management Interface for PHY register
configuration
Programmable interrupt output
LED outputs for link and activity status indication
On-chip termination resistors for the differential pairs
Baseline Wander Correction
HP Auto MDI/MDI-X for reliable detection and
correction for straight-through and crossover cables
with disable and enable option
Auto-negotiation to automatically select the highest link-
up speed (10/100 Mbps) and duplex (half/full)
Power down and power saving modes
LinkMD® TDR-based cable diagnostics for identification
of faulty copper cabling
Parametric NAND Tree support for fault detection
between chip I/Os and board
____________________________________________________________________________________________________________
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
August 2010
M9999-082710-1.0



Micrel Semiconductor
Micrel Semiconductor

KSZ8031RNL Datasheet Preview

KSZ8031RNL Datasheet

10Base-T/100Base-TX PHY

No Preview Available !

KSZ8031RNL pdf
Micrel, Inc.
More Features
Loopback modes for diagnostics
Single 3.3V power supply with VDD I/O options for
1.8V, 2.5V, or 3.3V
Built-in 1.2V regulator for core
Available in 24-pin (4mm x 4mm) QFN package
Applications
Game Console
IP Phone
IP Set-top Box
IP TV
LOM
Printer
KSZ8021RNL / KSZ8031RNL
Ordering Information
Part Number
Temperature
Range
KSZ8021RNL
0°C to 70°C
KSZ8021RNLI (1)
40°C to 85°C
KSZ8031RNL
0°C to 70°C
KSZ8031RNLI (1)
40°C to 85°C
Note:
1. Contact factory for lead time.
Package
24-Pin QFN
24-Pin QFN
24-Pin QFN
24-Pin QFN
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Description
RMII with 50MHz clock input (power-up default),
Commercial Temperature
RMII with 50MHz clock input (power-up default),
Industrial Temperature
RMII with 25MHz crystal/clock input and 50MHz RMII
REF_CLK output (power-up default), Commercial
Temperature
RMII with 25MHz crystal/clock input and 50MHz RMII
REF_CLK output (power-up default), Industrial
Temperature
August 2010
2 M9999-082710-1.0


Part Number KSZ8031RNL
Description 10Base-T/100Base-TX PHY
Maker Micrel Semiconductor
Total Page 30 Pages
PDF Download
KSZ8031RNL pdf
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