Part Audit Review

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The build report shows all requested corrections landed using TE drawing C-1827231 Rev. F4. I’m now running an independent read-back review of the 440-pin mapping, unbound hold-downs, and NPTH geometry.
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4/4 Independently verify symbol-to-pad mapping and mechanical geometry

Source the exact TE customer drawing and mounting-feature dimensions

Remove mechanical terminals 441–444 and leave a 440-pin symbol

Correct mounting/locating-hole definitions in the footprint

Independently verify symbol-to-pad mapping and mechanical geometry

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TE 1827231 Verification
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Received notification from "TE 1827231 Verification" that it finished — picking the work back up.

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Corrections completed and independently verified against TE customer drawing C-1827231 Rev. F4:
  • Symbol now has exactly 440 passive terminals, numbered 1–440.
  • Four hold-down lands remain physically present but are electrically unmapped.
  • Four locating holes are correctly defined as NPTH: left pair Ø0.90 mm, right pair Ø1.60 mm.
  • All 440 contact pads retain correct one-to-one terminal mapping.
  • No remaining discrepancies were found.
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Part Information Audit
Scope
Audit of TE Connectivity 3-1827231-6 metadata, schematic symbol, terminal definitions, and PCB footprint against the attached PDF and the official TE product page.
Authoritative identity
The attached URL is populated, so no Datasheet property update was required. The attached PDF appears to be a TE COM board-to-board family brochure rather than the part-specific customer drawing. It confirms the family, 440 positions, 0.5 mm pitch, vertical SMT configuration, and identifies 3-1827231-6 as the 4 mm receptacle with 8 µin plating and hard-tray packaging. Exact footprint geometry should still be checked against the TE customer drawing before fabrication.
Current project metadata

Table

FieldCurrent valueReview
Project name / MPN3-1827231-6Correct
ManufacturerTE Connectivity AMP ConnectorsCorrect
Part TypeConnectorsAcceptable, though singular Connector would be cleaner
Designator prefixJCorrect
Datasheet URLPopulatedNo update required
MountPCBMismatch: should state Surface Mount / SMT
Package or Case CodeTOIncorrect: TO is a transistor-outline package code and does not describe this connector
Description440-position, 0.5 mm pitch, vertical receptacleCore identity is correct
Symbol and terminal audit
  • The schematic symbol exposes 444 electrical terminals, numbered 1–444.
  • The manufacturer identifies the connector as 440 positions.
  • Terminals 1–440 are plausible signal/contact positions.
  • Terminals 441–444 correspond in the footprint to four large rectangular mechanical solder lands, not normal 0.5 mm-pitch contacts.
  • Therefore pins 441–444 are likely incorrectly modeled as electrical connector positions. They should be non-electrical mechanical/hold-down pads unless a part-specific drawing explicitly assigns electrical functions.
  • Every terminal has pin name equal to its number, which is appropriate for a generic high-density connector.
  • All terminal electrical types are Unspecified; for a passive connector, Passive is preferable.
  • Pin descriptions are absent. For contacts 1–440, descriptions such as Board-to-board signal contact would improve usability. Mechanical lands should not have schematic pins.
Footprint audit
Contact array
  • The footprint contains 440 small rectangular contact pads.
  • Sample pad geometry resolves to approximately 0.45 mm × 1.75 mm.
  • Contact placement forms two long banks with 0.5 mm incremental spacing, consistent with the stated 0.5 mm connector pitch.
  • The contact count and general array topology are consistent with a 440-position receptacle.
Additional lands and holes
  • Four larger rectangular pads, numbered 441–444, are approximately 1.65 mm × 3.3 mm and sit outside the signal-contact array. These appear to be mechanical hold-down/solder tabs but are mapped to schematic terminals.
  • Four circular nodes, numbered 449–452, are approximately 0.9 mm or 1.6 mm diameter and appear to be locating/tooling features.
  • The circular nodes are currently represented as top-layer copper pads without drill definitions. If the TE drawing specifies locating holes or non-plated holes, this is a serious footprint mismatch: they must be modeled as drilled NPTH features rather than solid copper circles.
  • Exact body outline, courtyard, pad-to-datum offsets, and hole diameters could not be conclusively verified from the attached family brochure. A part-specific TE customer drawing is required for release-level mechanical approval.
Key specifications

Table

SpecificationVerified value / status
Connector typePCB mount receptacle, board-to-board
OrientationVertical, parallel stacking
Positions440
Pitch0.5 mm
PCB terminationSMT
FamilyTE Free Height / COM board-to-board
Receptacle height4 mm family designation in attached TE brochure
Contact platingGold mating area; 8 µin variant indicated by family table
Data capabilityAttached family brochure lists legacy 8 GT/s parts and newer family capability up to 16 GT/s; do not assign 16 GT/s specifically to this legacy MPN without a part-specific specification
Current / voltageProject description states 0.5 A and 50 VAC, but these values were not confirmed in the attached family brochure during this audit
TemperatureProject description states -40 °C to +85 °C; the attached brochure gives a broader family value for newer products, so the exact MPN range remains unverified
Mismatch summary
  1. Critical — symbol has 444 electrical pins for a 440-position connector. Pins 441–444 likely represent mechanical hold-down lands.
  2. Critical — possible locating holes are modeled as copper-only pads. Nodes 449–452 require comparison to the TE customer drawing and likely conversion to drilled NPTH features.
  3. High — Package or Case Code is TO. This is incorrect for a board-to-board connector.
  4. Medium — Mount is PCB. It should explicitly be Surface Mount / SMT.
  5. Medium — pin electrical types are Unspecified. Contacts should normally be Passive; mechanical features should have no schematic terminals.
  6. Medium — no pin descriptions. Add a generic contact description for pins 1–440.
  7. Verification gap — attached PDF is a family brochure, not the detailed customer drawing. Exact footprint dimensions and the current/voltage/temperature claims are not release-verified.
  1. Obtain the official TE customer drawing for 3-1827231-6 / base drawing 1827231.
  2. Remove schematic terminals 441–444 if the drawing confirms they are mechanical hold-downs; retain the physical pads as unbound mechanical copper.
  3. Convert locating features 449–452 to the specified plated or non-plated drill geometry.
  4. Replace Package or Case Code: TO with a connector-specific package description such as TE Free Height 440-position 0.5 mm SMT receptacle.
  5. Set Mount to Surface Mount and terminal types 1–440 to Passive.
  6. Re-check all pad dimensions, datum offsets, body outline, and pin-1 orientation against the customer drawing before manufacturing use.

  • Scope

  • Authoritative identity

  • Current project metadata

  • Symbol and terminal audit

  • Footprint audit

  • Contact array

  • Additional lands and holes

  • Key specifications

  • Mismatch summary

  • Recommended corrections