KSZ9031RNX Datasheet, PDF (1/75 Pages) Micrel Semiconductor – Gigabit Ethernet Transceiver with RGMII Support

KSZ9031RNX
Gigabit Ethernet Transceiver
with RGMII Support
Data Sheet Rev. 1.0
General Description
The KSZ9031RNX is a completely integrated triple-speed
(10Base-T/100Base-TX/1000Base-T) Ethernet physical-
layer transceiver for transmission and reception of data on
standard CAT-5 unshielded twisted pair (UTP) cable.
The KSZ9031RNX provides the Reduced Gigabit Media
Independent Interface (RGMII) for direct connection to
RGMII MACs in Gigabit Ethernet processors and switches
for data transfer at 10/100/1000Mbps.
The KSZ9031RNX reduces board cost and simplifies
board layout by using on-chip termination resistors for the
four differential pairs and by integrating an LDO controller
to drive a low-cost MOSFET to supply the 1.2V core.
The KSZ9031RNX offers diagnostic features to facilitate
system bring-up and debugging in production testing and
in product deployment. Parametric NAND tree support
enables fault detection between KSZ9031 I/Os and the
board. The LinkMD^® TDR-based cable diagnostic identifies
faulty copper cabling. Remote and local loopback functions
verify analog and digital data paths.
The KSZ9031RNX is available in a 48-pin, lead-free QFN
package (see “Ordering Information”).
Data sheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• Single-chip 10/100/1000Mbps IEEE 802.3 compliant
Ethernet transceiver
• RGMII timing supports on-chip delay according to
RGMII Version 2.0, with programming options for
external delay and making adjustments and corrections
to TX and RX timing paths
• RGMII with 3.3V/2.5V/1.8V tolerant I/Os
• Auto-negotiation to automatically select the highest link-
up speed (10/100/1000Mbps) and duplex (half/full)
• On-chip termination resistors for the differential pairs
• On-chip LDO controller to support single 3.3V supply
operation – requires only one external FET to generate
1.2V for the core
• Jumbo frame support up to 16KB
• 125MHz reference clock output
• Energy detect power-down mode for reduced power
consumption when the cable is not attached
• Energy Efficient Ethernet (EEE) support with low-power
idle (LPI) mode and clock stoppage for 100Base-TX/
1000Base-T and transmit amplitude reduction with
10Base-Te option
• Wake-on-LAN (WOL) support with robust custom-packet
detection
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
October 2012
M9999-103112-1.0