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AR8031-AL1A

AR8031 Integrated 10/100/1000 Mbps Ethernet Transceiver

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Data Sheet

August 2011

Version 1.1

AR8031 Integrated 10/100/1000 Mbps Ethernet

Transceiver

General Description

The AR8031 is part of the Arctic family of

devices — which includes the AR8031, AR8033,

and AR8035. The AR8031 is Atheros’ 4th

generation, single port, 10/100/1000 Mbps, Tri-

speed Ethernet PHY. It supports both RGMII

and SGMII interfaces to the MAC.

The AR8031 provides a low power, low BOM

(Bill of Materials) cost solution for

comprehensive applications including

enterprise, carrier and home networks such as

CPE, home gateway, enterprise switch, carrier

switch/router, mobile base station and base

station controller, optical module and media

converter, industry automation and

measurement.

The AR8031 integrates Atheros Green ETHOS®

power saving technologies and significantly

saves power not only during the work time,

but also overtime. Atheros Green ETHOS®

power savings include ultra-low power in

cable unplugged mode or port power down

mode, and automatic optimized power saving

based on cable length. The AR8031 also

supports IEEE 802.3az EEE standard (Energy

Efficient Ethernet) and Atheros proprietary

SmartEEE. SmartEEE allows legacy MAC/SoC

devices without 802.3az support to function as

a complete 802.3az system. Further, the AR8031

supports Wake-on-LAN (WoL) feature to be

able to help manage and regulate total system

power requirements.

The AR8031 embeds CDT (Cable Diagnostics

Test) technology on-chip which allows

customers to measure cable length, detect the

cable status, and identify remote and local PHY

malfunctions, bad or marginal patch cord

segments or connectors. Some of the possible

problems that can be detected include opens,

shorts, cable impedance mismatch, bad

connectors, termination mismatch, and a bad

transformer.

The AR8031 requires only a single, 3.3V power

supply. On-chip regulators provide all the

other required voltages. It integrates the

termination R/C circuitry on both the MAC

interfaces (RGMII/SGMII) and the serial

resistors for the line side.

The AR8031 device also incorporates a 1.25

GHz SerDes. This interface can be connected

directly to a fiber-optic transceiver for 1000

BASE-X /100 BASE-FX mode or to MAC

device for SGMII interface.

The AR8031 supports both 1588v2 and

synchronous Ethernet to offer a complete time

synchronization solution to meet the next

generation network requirements. The key new

features supported by the device are:

n Clock synchronization between slave and

grandmaster by the exchange of PTP

packets. Supports IEEE 1588v2 by offering a

1588 paket parser, accurate time-stamping

and insertion to support both one-step and

two-step clock modes

n Supports both IEEE 1588v2 and

Synchronous Ethernet by offering recovered

clock output from data on the network-line

side.

The AR8031 supports IEEE 802.3az Energy

Efficient Ethernet (EEE) standard. The key

features supported by the device are:

n 10 BASE-Te PHY uses reduced transmit

amplitude.

n 100 BASE-TX and 1000 BASE-T use Low

Power Idle (LPI) mode to turn off unused

analog and digital blocks to save power

while data traffic is idle.

Features

n 10/100/1000 BASE-T IEEE 802.3 compliant

n Supports 1000 BASE-T PCS and auto-

negotiation with next page support

n Supports RGMII and/or SGMII interfaces

to MAC devices

n Supports Fiber and Copper combo mode

when MAC interface works in RGMII mode

n Supports additional IEEE 1000 BASE-X and

100 BASE-FX with Integrated SerDes

n RGMII timing modes support internal delay

and external delay on Rx path

© 2011 by Atheros Communications, Inc. All rights reserved. Atheros®, Atheros Driven®, Align®, Atheros XR®, Driving the Wireless Future®, Intellon®, No New Wires®,

Orion® , PLC4Trucks®, Powerpacket®, Spread Spectrum Carrier®, SSC®, ROCm®, Super A/G®, Super G®, Super N®, The Air is Cleaner at 5-GHz®, Total 802.11®, U-

Nav®, Wake on Wireless®, Wireless Future. Unleashed Now.®, and XSPAN®, are registered by Atheros Communications, Inc. Atheros SST™, Signal-Sustain Technology™,

Ethos™, Install N Go™, IQUE™, ROCm™, amp™, Simpli-Fi™, There is Here™, U-Map™, U-Tag™, and 5-UP™ are trademarks of Atheros Communications, Inc. The

Atheros logo is a registered trademark of Atheros Communications, Inc. All other trademarks are the property of their respective holders. Subject to change without notice.

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