Part Datasheet Review and Verification
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
| Field | In project | Datasheet check | Result |
|---|---|---|---|
| MPN | LAN9354/ML | LAN9354/ML | Match |
| Manufacturer | Microchip | Microchip | Match |
| Package | 56-QFN | ML = 56-pin QFN | Match |
| Description | 3-port Ethernet switch, RMII, 10/100, 1.8/3.3 V | 3-port 10/100 managed Ethernet switch, Port 0 RMII MAC/PHY, Ports 1/2 internal PHYs | Match |
| Datasheet URL | Set | Valid datasheet found at existing URL | Match |
- The schematic contains 57 terminal components.
- The datasheet defines 56 package pins plus one exposed pad (VSS).
- The layout also contains 57 pads.
- Pin/pad count is consistent with the datasheet.
- This strongly suggests the project includes the exposed pad as a separate terminal, which is correct.
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
| Spec | Value |
|---|---|
| Device type | 3-port 10/100 Ethernet switch |
| Port configuration | Port 0 = RMII MAC/PHY, Ports 1 and 2 = integrated PHYs |
| PHY features | HP Auto-MDIX, optional 100BASE-FX support with external fiber transceiver |
| Main supply | 3.3 V |
| I/O supply | 1.8 V to 3.3 V |
| Core supply | 1.2 V |
| Regulator | Integrated 1.2 V regulator for single-3.3 V operation |
| Clocking | 25 MHz crystal or external oscillator; Port 0 uses 50 MHz RMII ref clock |
| Package | 56-pin QFN with exposed pad |
- 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:
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
| Area | Status |
|---|---|
| MPN / manufacturer / package | Good |
| Datasheet link | Good |
| Symbol pin names | Good |
| Symbol pin numbers | Good |
| Pin count incl. exposed pad | Good |
| Pin electrical types | Needs work |
| Pin descriptions / behavioral notes | Needs work |
| Footprint dimensional validation | Partially verified only |
- 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
4 days
Ready.
Reviews
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LAN9354_ML
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
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