Part Data Review and Validation

flux

1:23

Cross-checking project files.

Clarifying property updates.

Simplifying data access.

Analyzing the schematic.

Analyzing the PCB layout.

Looking for "SM712-02HTG manufacturer, exact MPN, package, pin count, and product description." in media?resourcetype=datasheets&itemid=a4019802-ff62-41ff-bf66-295f97422f81&filename=littelfuse-tvs-diode-array-sm712-datasheet

Looking for "Electrical characteristics and key specs for SM712 or SM712-02HTG: reverse standoff voltage, breakdown voltage, clamp voltage, peak pulse current, package, operating temperature." in media?resourcetype=datasheets&itemid=a4019802-ff62-41ff-bf66-295f97422f81&filename=littelfuse-tvs-diode-array-sm712-datasheet

Looking for "Pin configuration, pin names, pin descriptions, and package outline for the SOT-23-3 package used by SM712-02HTG." in media?resourcetype=datasheets&itemid=a4019802-ff62-41ff-bf66-295f97422f81&filename=littelfuse-tvs-diode-array-sm712-datasheet

Looking for "Does the datasheet describe this part as a TVS diode array for RS-485/RS-422 with one protected line pair? Provide the key application description." in media?resourcetype=datasheets&itemid=a4019802-ff62-41ff-bf66-295f97422f81&filename=littelfuse-tvs-diode-array-sm712-datasheet

I reviewed the part project against the available data and the datasheet-sync criteria. The project already has a Datasheet URL, so no web lookup was needed. For part-project verification, the main checks are: exact pin count match, exact pin-number match, datasheet as source of truth, and flagging any missing or ambiguous pin metadata

Summary

CategoryStatusNotes
MPNOKProject has SM712-02HTG; datasheet result matches exactly.
ManufacturerOKProject has Littelfuse; datasheet result matches.
Datasheet URLOKAlready present, so no update was required.
PackageMostly OKProject says SOT-23; datasheet says SOT23-3 / JEDEC TO-236. Functionally consistent, but project metadata is less specific.
Pin countOKDatasheet says 3 pins; schematic has 3 terminal elements and layout has 3 pads.
FootprintLooks consistentLayout shows exactly 3 pads, consistent with SOT-23-3.
Schematic symbolIncomplete metadataSymbol has 3 terminals, but all Pin Type values are Unspecified and no pin descriptions are present.
Pin descriptionsMismatch / missingDatasheet-based pin behavior exists, but project terminals do not carry pin descriptions.
Project descriptionNeeds cleanupCurrent description is not aligned with the datasheet’s clearer product description/application wording.

Key specs from the datasheet

SpecValue
Device typeAsymmetrical TVS diode array for RS-485 protection
Exact MPNSM712-02HTG
PackageSOT23-3 / JEDEC TO-236
Pin count3
Peak pulse power600 W
Peak pulse current19 A at 8/20 µs
Reverse standoff voltage7.0 V from pin 3 to pin 1 or 2; 12.0 V from pin 1 or 2 to pin 3
Breakdown voltage7.5 V / 13.3 V depending on direction
Clamp voltageUp to 31 V at 19 A in one polarity; 19 V in the opposite polarity
Operating temperature-40 °C to +125 °C
The datasheet-sync guidance says project metadata should use the exact MPN, manufacturer, package, and a clear functional description led by what the part does
Cross-check results Project properties
  • MPN: correct
  • Manufacturer Name: correct
  • Designator Prefix: D is appropriate for a diode device
  • Package or Case Code: acceptable but should ideally be SOT23-3 rather than the broader SOT-23
  • Part Type: currently Diodes, which is usable but not very specific; TVS Diode Array would better match the datasheet-sync guidance to use the functional category from the datasheet
  • Description: current text is somewhat inconsistent with the datasheet’s positioning. The datasheet describes the part as an RS-485 protection TVS diode array with asymmetrical working voltages, which is clearer than the current clamp-voltage-only phrasing.
Schematic symbol
The symbol contains exactly three terminal components:
What matches:
  • Pin numbers 1, 2, 3 are present
  • Terminal count matches the datasheet pin count exactly, which is a critical requirement
What is missing:
  • All three terminals have Pin Type: Unspecified
  • No Pin Description properties are present
  • No richer symbol metadata such as section/grouping, though for a 3-pin diode part that is less important than getting pin type and description right
Footprint
The layout contains:
  • a footprint container
  • exactly 3 pads, designators 1, 2, 3
That is consistent with the datasheet package being SOT23-3. So at a structural level, the footprint appears to match the package pin count.

Mismatches and flags

IssueSeverityDetail
Package metadata not fully specificLowProject says SOT-23; datasheet is more specifically SOT23-3 / TO-236.
Part Type too genericLowDiodes is broad; datasheet indicates TVS diode array.
Project description not idealMediumCurrent description focuses on clamp values but not the part’s core function.
Pin Type missing on all pinsMediumAll terminals are Unspecified, which reduces symbol quality/ERC usefulness.
Pin descriptions missingMediumNo terminal descriptions are present, so the symbol is incomplete from a library-quality standpoint.
Pin-name/function cross-check incompleteMediumThe retrieved datasheet text gave pin-number-based electrical behavior, but not explicit named terminal labels in a clean pin table extract, so I can only verify count and numbering, not exact terminal naming text.

Recommended cleanup

Property / AreaRecommended value
Part TypeTVS Diode Array
Package or Case CodeSOT23-3
DescriptionRS-485 protection TVS diode array, asymmetrical -7 V to 12 V working range, 600 W, 19 A, SOT23-3
Pin metadataAdd Pin Type and short Pin Description for pins 1, 2, 3
Bottom line
  • Good: MPN, manufacturer, datasheet presence, 3-pin symbol, and 3-pad footprint are all consistent.
  • Needs work: package specificity, part-type specificity, description quality, and especially terminal metadata.
  • No hard structural mismatch found between datasheet pin count and the current symbol/footprint.
  • Main mismatch is completeness, not geometry: the part is missing useful pin typing/description data expected for a polished part project
If you want, I can next help you generate the exact pin metadata to add for 1, 2, and 3.
Generate pin metadata
Tighten part metadata
List all mismatches
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Documents

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

    Assets

    SM712-02HTG-thumb.png

    SM712-02HTG-thumb.png

    SM712-02HTG-thumbThumbnail
    kicad_mod

    SM712-02HTG

    SM71202HTG.kicad_modFootprint
    SM712-02HTG

    SM712-02HTG

    SM712-02HTG Symbol.svgDefault
    stp

    SM712-02HTG

    SM712-02HTG.stp3D Model

    SM712-02HTG

    SM712-02HTG thumbnail
    31V, 19V Clamp 19A (8/20µs) Ipp Tvs Diode Surface Mount SOT-23-3 #CommonPartsLibrary #Diode #TVS

    Properties

    SM712-02HTG

    Littelfuse

    Diodes

    littelfuse.com/media?resourcetype=datasheets&itemid=a4019802-ff62-41ff-bf66-295f97422f81&filename=littelfuse-tvs-diode-array-sm712-datasheet

    D

    Surface Mount

    SOT-23

    creativecommons.org/licenses/by/4.0/

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