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 2007-2016 Microchip Technology Inc. DS00002260A-page 1

Highlights

• Single-Chip Ethernet Physical Layer Transceiver

(PHY)

• ESD Protection levels of ±8kV HBM without exter-

nal protection devices

• ESD protection levels of EN/IEC61000-4-2, ±8kV

contact mode, and ±15kV for air discharge mode

per independent test facility

• Comprehensive flexPWR

Technology

- Flexible Power Management Architecture

• LVCMOS Variable I/O voltage range: +1.6V to

+3.6V

• Integrated 3.3V to 1.8V regulator for optional sin-

gle supply operation.

- Regulator can be disabled if 1.8V system

supply is available.

• Performs HP Auto-MDIX in accordance with IEEE

802.3ab specification

• Cable length greater than 150 meters

• Automatic Polarity Correction

• Latch-Up Performance Exceeds 150mA per EIA/

JESD 78, Class II

• Energy Detect power-down mode

• Low Current consumption power down mode

• Low operating current consumption:

- 39mA typical in 10BASE-T and

- 79mA typical in 100BASE-TX mode

• Supports Auto-negotiation and Parallel Detection

• Supports the Media Independent Interface (MII)

and Reduced Media Independent Interface (RMII)

• Compliant with IEEE 802.3-2005 standards

- MII Pins tolerant to 3.6V

• IEEE 802.3-2005 compliant register functions

• Integrated DSP with Adaptive Equalizer

• Baseline Wander (BLW) Correction

• Vendor Specific register functions

• Low profile 36-pin QFN RoHS compliant package

(6 x 6 x 0.9mm height)

• 4 LED status indicators

• Commercial Operating Temperature 0 C to 70 C

• Industrial Operating Temperature -40 C to 85 C

version available (LAN8700i)

Applications

• Set Top Boxes

• Network Printers and Servers

• LAN on Motherboard

• 10/100 PCMCIA/CardBus Applications

• Embedded Telecom Applications

• Video Record/Playback Systems

• Cable Modems/Routers

• DSL Modems/Routers

• Digital Video Recorders

• Personal Video Recorders

• IP and Video Phones

• Wireless Access Points

• Digital Televisions

• Digital Media Adaptors/Servers

• POS Terminals

• Automotive Networking

• Gaming Consoles

• Security Systems

• POE Applications

• Access Control

LAN8700/LAN8700i

±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with

HP Auto-MDIX Support and flexPWR® Technology in a Small Footprint

 2007-2016 Microchip Technology Inc. DS00002260A-page 3

LAN8700/LAN8700i

Table of Contents

1.0 General Description ........................................................................................................................................................................ 4

2.0 Pin Configuration ............................................................................................................................................................................ 6

3.0 Pin Description ................................................................................................................................................................................ 8

4.0 Architecture Details ....................................................................................................................................................................... 14

5.0 Registers ....................................................................................................................................................................................... 28

6.0 AC Electrical Characteristics ......................................................................................................................................................... 48

7.0 DC Electrical Characteristics ........................................................................................................................................................ 58

8.0 Application Notes .......................................................................................................................................................................... 63

9.0 Package Outline, Tape and Reel .................................................................................................................................................. 65

Appendix A: Data Sheet Revision History ........................................................................................................................................... 68

The Microchip Web Site ...................................................................................................................................................................... 71

Customer Change Notification Service ............................................................................................................................................... 71

Customer Support ............................................................................................................................................................................... 71

Product Identification System ............................................................................................................................................................. 72

LAN8700/LAN8700i

DS00002260A-page 4  2007-2016 Microchip Technology Inc.

1.0 GENERAL DESCRIPTION

The Microchip LAN8700/LAN8700i is a low-power, industrial temperature (LAN8700i), variable I/O voltage, analog inter-

face IC with HP Auto-MDIX support for high-performance embedded Ethernet applications. The LAN8700/LAN8700i

can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.8V linear regulator. An option is

available to disable the linear regulator to optimize system designs that have a 1.8V power plane available.

1.1 Architectural Overview

The LAN8700/LAN8700i consists of an encoder/decoder, scrambler/descrambler, wave-shaping transmitter, output

driver, twisted-pair receiver with adaptive equalizer and baseline wander (BLW) correction, and clock and data recovery

functions. The LAN8700/LAN8700i can be configured to support either the Media Independent Interface (MII) or the

Reduced Media Independent Interface (RMII).

The LAN8700/LAN8700i is compliant with IEEE 802.3-2005 standards (MII Pins tolerant to 3.6V) and supports both

IEEE 802.3-2005 compliant and vendor-specific register functions. It contains a full-duplex 10-BASE-T/100BASE-TX

transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded twisted-pair cable,

and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair cable.

Hubs and switches with multiple integrated MACs and external PHYs can have a large pin count due to the high number

of pins needed for each MII interface. An increasing pin count causes increasing cost.

The RMII interface is intended for use on Switch based ASICs or other embedded solutions requiring minimal pincount

for ethernet connectivity. RMII requires only 6 pins for each MAC to PHY interface plus one common reference clock.

The MII requires 16 pins for each MAC to PHY interface.

The Microchip LAN8700/LAN8700i is capable of running in RMII mode. Please contact your Microchip sales represen-

tative for the latest RMII specification.

The LAN8700/LAN8700i referenced throughout this document applies to both the commercial temperature and indus-

trial temperature components. The LAN8700i refers to only the industrial temperature component.

FIGURE 1-1: LAN8700/LAN8700I SYSTEM BLOCK DIAGRAM

10/100

Media

Access

Controller

(MAC)

or SOC

LAN8700/

LAN8700i

Magnetics Ethernet

System Bus

LEDS/ GPIO

25 MHz (MII) or 50MHz (RMIII)

Crystal or External Clock

MII /RMII

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