Part Information Review and Updates
3:31
Reviewing project details.
Reviewing the bill of materials.
Analyzing the PCB layout.
Analyzing the schematic.
Looking for "Exact manufacturer part number, manufacturer name, package type, pin count, interface type, pressure range, supply voltage range, operating temperature range, and short functional description for MMR920C04ARE." in mmr920c04_datasheet_rev.3-_english.pdf
Looking for "Complete pin table with pin numbers, pin names, and pin functions for MMR920C04ARE. Include any no-connect pins if present." in mmr920c04_datasheet_rev.3-_english.pdf
Looking for "Package / mechanical information for MMR920C04ARE, including package name, body size, and whether it is LGA or another package type." in mmr920c04_datasheet_rev.3-_english.pdf
Looking for "Key electrical and performance specifications for MMR920C04ARE: pressure range, output type, interface, supply current, accuracy, temperature compensation range, media compatibility, and any notable application or implementation guidance." in mmr920c04_datasheet_rev.3-_english.pdf
Searching the project (2 questions).
Analyzing the PCB layout.
Searching project components.
Searching 4 domains.
Searching for components.
Searching 2 domains.
Searching for pin details.
Searching components.
Searching for asset details.
Searching 3 domains.
Summarizing metadata details.
Comparing datasheet information.
Searching 2 domains.
Fetching datasheet information.
Searching fetch_url.
Looking for "package name dimensions pad count outline package type number of pins for MMR920C04ARE" in mmr920c04_datasheet_rev.3-_english.pdf
Investigating metadata on footprints.
Searching pcb.
Search complete — 276 results across 6 domains.
Identifying discrepancies in datasheet.
Considering citation inclusion.
- Datasheet URL: already present in the project, so I did not search the web or change it.
- Overall status: the symbol and footprint look structurally close to the datasheet, but the part metadata and pin metadata are incomplete, and I found one clear pin-name typo plus several missing classification fields.
- Most important issue: all symbol terminals still have
Pin Type = Unspecified. For part projects, pin count should match the datasheet exactly and pin types should be explicitly set from the datasheet rather than left guessed or unspecified .
Metadata comparison
| Item | In project | From datasheet | Status |
|---|---|---|---|
| MPN | MMR920C04ARE | Datasheet body refers to MMR920C04 family / C04 range variant | Acceptable, but worth confirming exact ordering suffix |
| Manufacturer | Mitsumi Electric | MITSUMI ELECTRIC CO., LTD. / Mitsumi Co., Ltd. | Match |
| Part type | Sensors | Digital micro pressure sensor | Broad but acceptable |
| Description | PRESSURE SENSOR, 3.922KPA, GAGE, I2C/SPI | Digital micro pressure sensor, corrected digital output | Functionally correct, could be clearer |
| Package property | Missing | MEMS-12B | Missing |
| Pin count | 12 | 12 | Match |
| Datasheet URL | Set | Official PDF already linked | Match |
Datasheet key specs
| Parameter | Value |
|---|---|
| Device type | Digital micro pressure sensor |
| Pressure range | -40 to +40 cmH2O (-3.922 to +3.922 kPa) |
| Interface | SPI / I2C |
| I2C address | 0x67 |
| Supply, analog | 3.0 V to 3.6 V |
| Supply, digital I/O | 1.2 V to 3.6 V |
| Operating temperature | 0 C to 50 C |
| Pressure error | ±1.0 %FS max over 0 C to 50 C |
| Effective resolution | down to 0.002 cmH2O RMS in MODE4 |
| Package | MEMS-12B |
| Package size | 7.0 mm x 7.0 mm x 7.2 mm |
| Pressure medium | Air only, non-condensing |
Pin-by-pin symbol audit
| Datasheet pin | Expected name | Project terminal | Result |
|---|---|---|---|
| 1 | VDD | VDD | Match |
| 2 | NC | NC_1 | Electrically OK, name differs |
| 3 | VDDIO | VDDIO | Match |
| 4 | PSEL | PSEL | Match |
| 5 | GND | GND | Match |
| 6 | SCLK/SCL | SCLK/SLC | Mismatch: typo |
| 7 | CSB | CSB | Match |
| 8 | SDO | SDO | Match |
| 9 | SDI/SDA | SDI/SDA | Match |
| 10 | DRDYB | DRDYB | Match |
| 11 | NC | NC_2 | Electrically OK, name differs |
| 12 | NC | NC_3 | Electrically OK, name differs |
- Pin count matches the datasheet: 12 / 12
- Pin numbering matches the datasheet
- One naming mismatch:
- SCLK/SLC should be SCLK/SCL
- NC pins are present, which is good
- All pins are missing proper pin typing
- I also could not find evidence that Pin Description, Section, or Pin Group metadata has been populated. For part projects, those are the normal fields to complete during datasheet sync .
Footprint findings
| Check | Result |
|---|---|
| Footprint pad count | 12 pads present |
| Pad naming | Matches the symbol naming set, including NC pads |
| Package family metadata | Not exposed in project metadata |
| Mechanical size verification | Not fully verifiable from the current indexed footprint data |
- The footprint has 12 pads, which matches the datasheet's 12-pin MEMS-12B package.
- The pad labels correspond to the symbol pins.
- Exact pad geometry
- Exact body outline
- Exact 7.0 mm x 7.0 mm x 7.2 mm package compliance
Issues found
| Severity | Item | Finding |
|---|---|---|
| High | Pin typing | All terminals are still Unspecified |
| Medium | Pin naming | SCLK/SLC should be SCLK/SCL |
| Medium | Package metadata | Package or Case Code is missing; should be MEMS-12B |
| Medium | Pin descriptions | No usable Pin Description metadata found |
| Low | NC naming | NC_1, NC_2, NC_3 differ from generic datasheet label NC, though electrically this is fine |
| Low | Description quality | Current description is usable, but could better describe the part's corrected digital-output behavior |
- Rename SCLK/SLC to SCLK/SCL
- Set proper Pin Type for all 12 terminals
- Add Package or Case Code = MEMS-12B
- Add Operating Voltage = 3.6 V and Operating Temperature = 0 C to 50 C
- Add short Pin Description entries for each terminal
- Optionally tighten Part Type from
Sensorsto Pressure Sensor - Optionally improve the description to something like:
Digital micro pressure sensor, +/-3.922 kPa gauge, SPI/I2C, MEMS-12B
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