General Description

The LAN8710A/LAN8710Ai is a low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver with variable I/O voltage that is compliant with the IEEE 802.3-2005 standards.

The LAN8710A/LAN8710Ai supports communication with an Ethernet MAC via a standard MII (IEEE 802.3u)/RMII interface. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10Mbps (10BASE-T) and 100Mbps (100BASE-TX) operation. The LAN8710A/LAN8710Ai implements auto-negotiation to automatically determine the best possible speed and duplex mode of operation. HP Auto-MDIX support allows the use of direct connect or cross-over LAN cables.

The LAN8710A/LAN8710Ai supports both IEEE 802.3-2005 compliant and vendor-specific register functions. However, no register access is required for operation. The initial configuration may be selected via the configuration pins as described in Section 3.7, Configuration Straps, on page 36. Register-selectable configuration options may be used to further define the functionality of the transceiver.

Per IEEE 802.3-2005 standards, all digital interface pins are tolerant to 3.6V. The device can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The linear regulator may be optionally disabled, allowing usage of a high efficiency external regulator for lower system power dissipation.

The LAN8710A/LAN8710Ai is available in both extended commercial and industrial temperature range versions. A typical system application is shown in Figure 1.1.

PRODUCT FEATURES

Highlights

■ Single-Chip Ethernet Physical Layer Transceiver

(PHY)

■ Comprehensive flexPWR? Technology

— Flexible Power Management Architecture

— LVCMOS Variable I/O voltage range: +1.6V to +3.6V

— Integrated 1.2V regulator with disable feature

■ HP Auto-MDIX support

■ Small footprint 32-pin QFN lead-free RoHS compliant

package (5 x 5 x 0.9mm height)

Target Applications

■ Set-Top Boxes

■ Networked Printers and Servers

■ Test Instrumentation

■ LAN on Motherboard

■ Embedded Telecom Applications

■ Video Record/Playback Systems

■ Cable Modems/Routers

■ DSL Modems/Routers

■ Digital Video Recorders

■ IP and Video Phones

■ Wireless Access Points

■ Digital Televisions

■ Digital Media Adaptors/Servers

■ Gaming Consoles

■ POE Applications (Refer to SMSC Application Note 17.18)

Key Benefits

■ High-Performance 10/100 Ethernet Transceiver

— Compliant with IEEE802.3/802.3u (Fast Ethernet)

— Compliant with ISO 802-3/IEEE 802.3 (10BASE-T)

— Loop-back modes

— Auto-negotiation

— Automatic polarity detection and correction

— Link status change wake-up detection

— Vendor specific register functions

— Supports both MII and the reduced pin count RMII

interfaces

■ Power and I/Os

— Various low power modes

— Integrated power-on reset circuit

— Two status LED outputs

— Latch-Up Performance Exceeds 150mA per EIA/JESD

78, Class II

— May be used with a single 3.3V supply

■ Additional Features

— Ability to use a low cost 25Mhz crystal for reduced BOM

■ Packaging

— 32-pin QFN (5x5 mm) Lead-Free RoHS Compliant

package with MII and RMII

■ Environmental

— Extended commercial temperature range

(0°C to +85°C)

— Industrial temperature range version available

(-40°C to +85°C)