Part Verification Review
Thought for 8 sec
I’ll inspect the part metadata and existing symbol/footprint, find the official datasheet if needed, update the Datasheet property, then verify pins and summarize any mismatches.
Worked for 1 min 34 sec
The official MaxLinear datasheet URL is now set on the part. I’m extracting the pinout/package/specs from that source and checking the current symbol and footprint against it.
Worked for 7 mins 7 sec
Created a project doc
SP490EEN-L/TR Part Verification Report
Date: 2026-07-16 Reviewed available part information for the published Flux part project SP490EEN-L/TR, updated the Datasheet URL to the off...
Completed the part review and updated the Datasheet URL to the official MaxLinear PDF. The pinout, symbol arrangement, and NSOIC-8 footprint look functionally correct; the main flags are missing pin descriptions, all pin types set to
Unspecified, sparse project description, and an indexed logicFunction: AND metadata issue.Full details are in SP490EEN-L/TR Part Verification Report.
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SP490EEN-L/TR Part Verification Report
Date: 2026-07-16
Scope
Reviewed available part information for the published Flux part project
SP490EEN-L/TR, updated the Datasheet URL to the official MaxLinear PDF, and cross-checked schematic terminals, symbol arrangement, footprint, and pin metadata against the datasheet.Sources
- Official datasheet: https://www.maxlinear.com/ds/sp490e_sp491e.pdf
- Manufacturer/product family: MaxLinear SP490E / SP491E Enhanced Full Duplex RS-485 Transceivers
- Datasheet revision observed: Rev 1.0.2, March/September 2018 markings in extracted PDF content
Current Flux Part Information
Table
| Field | Current value / observation |
|---|---|
| Project / part name | SP490EEN-L/TR |
| Manufacturer Part Number | SP490EEN-L/TR |
| Manufacturer | MaxLinear / MaxLinear, Inc. indicated by datasheet and library index |
| Designator Prefix | U |
| Published Part UID | d8410859-e9e2-48f3-9017-ae436687ed46 |
| Terminal / pad count | 8 |
| Datasheet URL | Updated to official MaxLinear URL: https://www.maxlinear.com/ds/sp490e_sp491e.pdf |
| Operating Voltage property | 5 V |
| Connectivity property | RS-485 |
| Project description | SP490EEN-L/TR only; functional description is sparse at project level |
| Package / footprint | NSOIC-8 / SOIC-8 style SMD footprint |
| BOM items / nets | None, expected for a standalone published part project |
Flux library search also indexed the part as an 8-SOIC, 8-terminal MaxLinear RS-485/RS-422 transceiver, but its indexed Datasheet URL may lag the current project property update.
Datasheet Key Specs
Table
| Parameter | Datasheet value |
|---|---|
| Function | Full-duplex RS-485 / RS-422 differential transceiver, one driver and one receiver |
| Supply | 5 V only; electrical table specifies VCC = 4.75 V to 5.25 V |
| Max data rate | 10 Mbps |
| Receiver input sensitivity / threshold | ±200 mV |
| Receiver common-mode range | -7 V to +12 V |
| Receiver input resistance | 12 kΩ min, 15 kΩ typical |
| Supply current | 900 µA typical from extracted table content; verify original PDF column if used as a hard max |
| ESD protection | ±15 kV Human Body Model and ±15 kV IEC61000-4-2 air discharge |
| Temperature grade for SP490EEN-L/TR | Industrial, -40 °C to +85 °C |
| Package for SP490EEN-L/TR | 8-pin NSOIC, tape/reel packaging |
| Compatibility noted by datasheet | Pin compatible with LTC490 and SN75179 for SP490E |
Datasheet Pin Table vs Flux Terminals
Table
| Pin | Datasheet name | Datasheet description | Current Flux terminal | Current Pin Type | Match? |
|---|---|---|---|---|---|
| 1 | VCC | Positive supply | VCC | Unspecified | Yes |
| 2 | R | Receiver output | R | Unspecified | Yes |
| 3 | D | Driver input | D | Unspecified | Yes |
| 4 | GND | Ground connection | GND | Unspecified | Yes |
| 5 | Y | Non-inverting driver output | Y | Unspecified | Yes |
| 6 | Z | Inverting driver output | Z | Unspecified | Yes |
| 7 | B | Inverting receiver input | B | Unspecified | Yes |
| 8 | A | Non-inverting receiver input | A | Unspecified | Yes |
Symbol Review
The symbol terminal numbering matches the datasheet exactly.
Observed symbol arrangement:
Text
SP490E +---------+ 1 | VCC A | 8 2 | R B | 7 3 | D Z | 6 4 | GND Y | 5 +---------+
This is a reasonable IC symbol arrangement: logic/power pins on the left and differential bus pins on the right. The right-side top-to-bottom order A, B, Z, Y corresponds to physical pins 8, 7, 6, 5 and is not a mismatch.
Footprint Review
Current footprint is an NSOIC-8 / SOIC-8 SMD footprint with:
Table
| Footprint feature | Observed value | Datasheet / assessment |
|---|---|---|
| Pad count | 8 | Matches SP490E 8-pin NSOIC |
| Pad pitch | 1.27 mm | Matches datasheet e = 1.27 mm BSC |
| Pad size | 1.4605 mm x 0.5588 mm | Plausible SOIC-8 land size |
| Pad row span, center-to-center | 5.448 mm | Plausible for NSOIC-8 with 5.80–6.20 mm overall lead span |
| 3D model | NSOIC-8.step | Consistent with package label |
| Datasheet land pattern | Not provided in official PDF | Footprint cannot be compared to a manufacturer land pattern from this datasheet; only package geometry can be checked |
Datasheet NSOIC8 mechanical dimensions extracted from page 11:
Table
| Mechanical feature | Datasheet value |
|---|---|
| Body length D | 4.80–5.00 mm |
| Body width E1 | 3.80–4.00 mm |
| Overall width E | 5.80–6.20 mm |
| Pitch e | 1.27 mm BSC |
| Lead width b | 0.31–0.51 mm |
| Lead/foot length L | 0.40–1.27 mm |
| Overall height A | 1.35–1.75 mm |
| Standoff A1 | 0.10–0.25 mm |
| Lead thickness c | 0.17–0.25 mm |
| Lead angle theta | 0–8 degrees |
Mismatches / Quality Flags
Table
| Item | Severity | Finding |
|---|---|---|
| Datasheet URL | Fixed | Official MaxLinear datasheet URL has been set on the project. |
| Pin numbers/names | None | All 8 terminals match the datasheet pin table. |
| Symbol arrangement | None | Symbol layout is functionally and top-view consistent. |
| Footprint package | None / low risk | Footprint is an appropriate NSOIC-8/SOIC-8 style footprint with matching pitch and pad count. No manufacturer land pattern is present in the datasheet, so exact land-pattern validation is not possible from the official PDF alone. |
| Pin Type properties | Warning | All terminal Pin Type properties are Unspecified; these should be populated for ERC/documentation quality. |
| Pin Description properties | Warning | No terminal Pin Description properties are present; descriptions should be populated from the datasheet pin table. |
| Project-level description | Info | Description is currently just the MPN; a richer functional description would improve search and reuse. |
| Part type/library metadata | Info | Library index classifies this as Integrated Circuit / Logic, but a more precise category would be interface transceiver / RS-485 transceiver if supported. |
| Logic Function indexed as AND | Warning | Library search returned logicFunction: AND, which is not appropriate for this RS-485 transceiver. This may be stale/indexed metadata rather than a visible project property. |
Recommended Pin Metadata
Table
| Pin | Name | Recommended Pin Type | Recommended Pin Description |
|---|---|---|---|
| 1 | VCC | Power In | Positive 5 V supply, 4.75–5.25 V operating range |
| 2 | R | Output | Receiver logic output |
| 3 | D | Input | Driver logic input |
| 4 | GND | Ground | Ground connection/reference |
| 5 | Y | Output | Non-inverting driver differential output |
| 6 | Z | Output | Inverting driver differential output |
| 7 | B | Input | Inverting receiver differential input |
| 8 | A | Input | Non-inverting receiver differential input |
Bottom Line
The part is functionally correct for MaxLinear SP490EEN-L/TR: MPN, pin count, pin numbering, symbol arrangement, and NSOIC-8 footprint are consistent with the official datasheet. The main issues are metadata-quality warnings: missing pin descriptions, unspecified pin types, sparse project description, and an apparently inappropriate indexed
logicFunction: AND value.Scope
Sources
Current Flux Part Information
Datasheet Key Specs
Datasheet Pin Table vs Flux Terminals
Symbol Review
Footprint Review
Mismatches / Quality Flags
Recommended Pin Metadata
Bottom Line
