LAN8720AI-CP-TR

Part: LAN8720A/LAN8720Ai — Microchip Type: 10/100 Ethernet Transceiver Description: Low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver with variable I/O voltage, compliant with IEEE 802.3-2005 standards, supporting RMII interface and HP Auto-MDIX.

Operating Conditions:

• Supply voltage: May be used with a single 3.3V supply (VDD2A, VDD1A). Variable I/O voltage range: +1.6V to +3.6V (VDDIO).
• Operating temperature: 0°C to +85°C (extended commercial), -40°C to +85°C (industrial)
• Clock input: 25 MHz crystal

Absolute Maximum Ratings:

• Latch-Up Performance: Exceeds 150mA per EIA/JESD 78, Class II

Key Specs:

• Ethernet Standards: IEEE 802.3/802.3u (Fast Ethernet), ISO 802-3/IEEE 802.3 (10BASE-T)
• Data Rates: 10 Mbps (10BASE-T), 100 Mbps (100BASE-TX)
• Interface: Reduced Media Independent Interface (RMII)
• I/O Voltage Range (VDDIO): +1.6V to +3.6V
• Internal Regulator: Integrated 1.2V regulator (can be disabled)
• Crystal Frequency: 25 MHz
• RBIAS Resistor: 12.1 kΩ (1%) to ground

Features:

• Auto-negotiation
• Automatic polarity detection and correction (HP Auto-MDIX)
• Link status change wake-up detection
• Various low power modes
• Integrated power-on reset circuit
• Two status LED outputs
• Supports vendor specific register functions

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 Adapters/Servers
• Gaming Consoles
• POE Applications

Package:

• 24-pin QFN/SQFN (4x4 mm) Lead-Free RoHS Compliant

• 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 Adapters/Servers
• Gaming Consoles
• POE Applications (Refer to Application Note 17.18)

NOTE: Exposed pad (VSS) on bottom of package must be connected to ground

• Note 2-1 When a lower case 'n' is used at the beginning of the signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal is active low.
• Note 2-2 The buffer type for each signal is indicated in the BUFFER TYPE column. A description of the buffer types is provided in Section 2.2.

TABLE 2-1: RMII SIGNALS

• Note 5-2 This rating does not apply to the following pins: XTAL1/CLKIN, XTAL2, RBIAS.
• Note 5-3 This rating does not apply to the following pins: RBIAS.
• Note 5-4 0 o C to +85 o C for extended commercial version, -40 o C to +85 o C for industrial version.
• Note 5-5 Performed by independent 3rd party test facility.

Stresses exceeding those listed in this section could cause permanent damage to the device. This is a stress rating only. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Functional operation of the device at any condition exceeding those indicated in Section 5.2, "Operating Conditions*", Section 5.1, "Absolute Maximum Ratings*", or any other applicable section of this specification is not implied. Note, device signals are NOT 5 volt tolerant unless specified otherwise.

This section provides typical application diagrams for the following:

• Simplified System Level Application Diagram
• Power Supply Diagram (1.2V Supplied by Internal Regulator)
• Power Supply Diagram (1.2V Supplied by External Source)
• Twisted-Pair Interface Diagram (Single Power Supply)
• Twisted-Pair Interface Diagram (Dual Power Supplies)