Part Datasheet Review and Verification

flux

1:30

Considering tool options.

Reviewing the bill of materials.

Analyzing the PCB layout.

Analyzing the schematic.

Looking for "Extract the key product information for Microchip LAN9354/ML: package, pin count, supply voltages, interface, ethernet ports, oscillator/clock requirements, and the complete pin table with pin numbers, names, types/descriptions." in 00001926B-765655.pdf

Clarifying documentation details.

I reviewed the part project for LAN9354/ML and compared the available project data against the datasheet URL already present in the project, so no datasheet-property update was needed.
Part information review

Project metadata vs datasheet

FieldIn projectDatasheet checkResult
MPNLAN9354/MLLAN9354/MLMatch
ManufacturerMicrochipMicrochipMatch
Package56-QFNML = 56-pin QFNMatch
Description3-port Ethernet switch, RMII, 10/100, 1.8/3.3 V3-port 10/100 managed Ethernet switch, Port 0 RMII MAC/PHY, Ports 1/2 internal PHYsMatch
Datasheet URLSetValid datasheet found at existing URLMatch
Pin count / symbol completeness Symbol terminal count
  • The schematic contains 57 terminal components.
  • The datasheet defines 56 package pins plus one exposed pad (VSS).
  • The layout also contains 57 pads.
Conclusion
  • Pin/pad count is consistent with the datasheet.
  • This strongly suggests the project includes the exposed pad as a separate terminal, which is correct.
Cross-check of symbol pin names and pin numbers
I checked the visible terminal names and their assigned pin numbers against the datasheet pin table.
Result
  • Pin numbers and names appear to match the datasheet across the symbol.
  • Key examples that match:

Key specs from the datasheet

SpecValue
Device type3-port 10/100 Ethernet switch
Port configurationPort 0 = RMII MAC/PHY, Ports 1 and 2 = integrated PHYs
PHY featuresHP Auto-MDIX, optional 100BASE-FX support with external fiber transceiver
Main supply3.3 V
I/O supply1.8 V to 3.3 V
Core supply1.2 V
RegulatorIntegrated 1.2 V regulator for single-3.3 V operation
Clocking25 MHz crystal or external oscillator; Port 0 uses 50 MHz RMII ref clock
Package56-pin QFN with exposed pad
Mismatches / issues flagged 1) Pin electrical types are not defined
  • Every terminal I checked has Pin Type = Unspecified in the project.
  • The datasheet clearly distinguishes electrical behavior such as:
    • power
    • input
    • output
    • bidirectional
    • analog I/O
    • strap pins
  • For a part project, this is a real metadata gap.
Impact: ERC behavior and downstream part quality are weaker than they should be.
2) Pin descriptions are missing from the symbol data
  • The terminal names are present, but I do not see datasheet-derived per-pin descriptions stored in the schematic terminal properties.
  • Example datasheet-required meanings that are not captured as project pin descriptions:
    • TESTMODE: must be tied to VSS for proper operation
    • RBIAS: requires 12.1 kΩ 1% to ground
    • RESERVED: must be left unconnected
Impact: Important usage constraints are easy to miss when someone places this part later.
3) Footprint package metadata matches, but land pattern details are not fully verifiable from the available layout metadata
  • The project has a footprint with 57 pads, which is consistent.
  • However, the layout data exposed here does not include enough dimensional detail to confirm:
    • QFN body size
    • pad geometry
    • exposed-pad size
    • courtyard / fab outline accuracy
Conclusion:
  • Package class looks right
  • Pad count looks right
  • Exact footprint geometry could not be fully verified from the available metadata

Overall assessment

AreaStatus
MPN / manufacturer / packageGood
Datasheet linkGood
Symbol pin namesGood
Symbol pin numbersGood
Pin count incl. exposed padGood
Pin electrical typesNeeds work
Pin descriptions / behavioral notesNeeds work
Footprint dimensional validationPartially verified only
Bottom line
  • The part project looks structurally correct for LAN9354/ML.
  • I did not find obvious pin-name or pin-number mismatches.
  • The main gaps are:
    • missing pin electrical types
    • missing pin descriptions / constraints from the datasheet
    • footprint geometry not fully dimension-verified from the currently exposed layout data
If you want, I can next help you turn this into a precise cleanup checklist for the part project, including which terminals should be marked as power, input, output, bidirectional, analog, or strap pins.
Fix pin metadata
Classify strap pins
Verify footprint dimensions
6 days

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Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    kicad_mod

    LAN9354_ML

    QFN50P800X800X100-57N-D.kicad_modFootprint
    image.png

    image.png

    imageThumbnail
    stp

    LAN9354_ML

    LAN9354_ML.stp3D Model
    LAN9354_ML

    LAN9354_ML

    LAN9354_ML Symbol.svgDefault

    LAN9354_ML

    LAN9354_ML thumbnail
    Ethernet Switch 10/100 Base-T/TX PHY I2C Interface 56-QFN (8x8) Microchip LAN9354/ML, 3-Port Ethernet Switch IC, RMII, 10 Mbit/s, 100 Mbit/s 1.8 3.3 V, 56-Pin QFN

    Properties

    LAN9354/ML

    Microchip

    Ethernet

    mouser.kr/datasheet/2/268/00001926B-765655.pdf

    IC

    56-QFN

    Parametric

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    Controls