LAN8720A-CP-TR Integrated Circuits (ICs)

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1. Describe

The LAN8720A-CP-TR/LAN8720Ai are low-power 10BASE-T/100BASE-TX physical layer (PHY) transceivers with variable I/O voltages compliant with the IEEE 802.3-2005 standard. LAN8720A/LAN8720Ai supports communication with Ethernet MAC via standard RMII interface. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver that supports 10Mbps (10BASE-T) and 100Mbps (100BASE-TX) operation. The LAN8720A/LAN8720Ai implements auto-negotiation to automatically determine the optimum speed and duplex mode of operation. HP Auto-MDIX support allows the use of direct connect or crossover LAN cables. The LAN8720A/LAN8720Ai supports IEEE 802.3-2005 compliant and vendor-specific register functions. However, this operation does not require register access. Register optional configuration options can be used to further define the functionality of the transceiver. All digital interface pins are 3.6V tolerant according to the IEEE 802.3-2005 standard. The device can be configured to operate on a single 3.3V supply using an integrated 3.3V to 1.2V linear regulator. The linear regulator can be optionally disabled, allowing the use of a high-efficiency external regulator Reduce system power consumption. The LAN8720A/LAN8720Ai are available in extended commercial and industrial temperature range versions.

2. Feature

    1. High performance 10/100 Ethernet transceiver

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

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

        - loopback mode

        - Auto-negotiation

        - Automatic polarity detection and correction

        - Link state change wake-up detection

        - Vendor specific register functions

        - Supports RMII interface with reduced pin count

    2. Power and I/O

        - Multiple low power modes

        - Integrated power-on reset circuit

        - Two status LED outputs

        - Latch-up performance exceeds 150mA per EIA/JESD 78, Level 2

        - Can be used with a single 3.3V supply

    3. Additional features

        - Ability to use low cost 25Mhz crystals to reduce BOM

    4. Package

        - 24-Pin QFN (4x4 mm) Pb-Free RoHS Compliant RMII package

    5. environment

        - Extended commercial temperature range (0°C to +85°C)

        - Available in industrial temperature range versions (-40°C to +85°C)

3. Emphasize

    1. Single-Chip Ethernet Physical Layer Transceiver (PHY)

    2. Integrated flexPWR® technology

        - Flexible power management architecture

        - LVCMOS Variable I/O Voltage Range: +1.6V to +3.6V

        - Integrated 1.2V regulator

    3. HP Auto-MDIX support

    4. Tiny 24-pin QFN lead-free RoHS compliant package (4 x 4 x 0.85mm height)

4. Application

    1. Set Top Box

    2. Networked Printers and Servers

    3. test instrument

    4. LAN on the motherboard

    5. Embedded Telecom Applications

    6. Video recording/playback system

    7. Cable Modem/Router

    8. DSL Modem/Router

    9. Digital Video Recorder

  10. IP and video telephony

  11. Wireless Access Point

  12. Digital Television

  13. Digital Media Adapters/Servers

  14. Game console

  15. POE applications

5. Pin configuration