KSZ8051MNLV-VAO

Drivers, Receivers, Transceivers Overview

The KSZ8051MNLV-VAO is an AEC-Q100 qualified single-supply 10BASE-T/100BASE-TX Ethernet physical-layer transceiver manufactured by Microchip Technology. It operates on a single 3.3V power supply with VDD I/O options for 1.8V, 2.5V, or 3.3V logic levels. The device integrates a low-noise regulator to supply the 1.2V core and includes on-chip termination resistors for differential pairs. It supports MII interface connections and features HP Auto MDI/MDI-X, auto-negotiation, and LinkMD cable diagnostics. The component is housed in a 32-pin 5 mm x 5 mm QFN package.

Drivers, Receivers, Transceivers Feature Summary

• AEC-Q100 automotive qualification for reliable operation in vehicle environments
• Integrated 1.2V core regulator and on-chip termination resistors to simplify board layout
• HP Auto MDI/MDI-X capability for automatic straight-through and crossover cable detection
• LinkMD TDR-based cable diagnostics for identifying faulty copper cabling

Drivers, Receivers, Transceivers Applications

• Automotive in-vehicle networking systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'VAO' against the manufacturer's current documentation to confirm availability and any potential changes in lead time or packaging specifications. Confirm that the MII interface variant matches the system design requirements, as the RNL variant offers RMII support instead. Ensure all electrical parameters align with the target application's voltage and temperature constraints before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component when an automotive-grade PHY with MII interface is required. The integrated regulator reduces external component count compared to non-integrated solutions. Verify that the host MAC processor supports the MII protocol. Consider the thermal performance of the QFN package within the enclosure. Check if the specific strap-in pin configurations meet the system's address and duplex requirements at reset.

Drivers, Receivers, Transceivers Part Context

This part belongs to the KSZ8051 family of Fast Ethernet transceivers designed for automotive applications. The 'MNL' designation indicates the Media Independent Interface (MII) version, distinct from the 'RNL' version which provides Reduced MII (RMII). The 'VAO' suffix typically denotes specific automotive grade and packaging variations defined by Microchip Technology. This series replaces older Micrel-branded components following the acquisition.

Drivers, Receivers, Transceivers Replacement Considerations

The KSZ8051RNLV-VAO serves as a functional alternative if the system utilizes an RMII-compliant MAC processor instead of MII. Both variants share identical physical layer capabilities and automotive qualifications. Pin compatibility differs due to the interface variation; direct pin-to-pin substitution requires verifying the MAC interface type.