Equiscan

flux

Answer to your earlier question
  • Heavier-retention USB‑C connectors use larger solder lugs and a stronger shell to resist peel, shear, and prying loads. Benefits:
    • Lower risk of solder joint cracking if the dongle is bumped while plugged into a phone.
    • Higher insertion/extraction cycle life and better strain relief.
    • More secure ground/shell bond, which also helps ESD/EMI.
    • Tradeoffs: larger footprint/keepouts, slightly more cost, and a bit more placement space.
Proceeding with the recommended changes I can’t apply the swap directly here, so follow these precise steps to change the parts and confirm availability:
  1. Replace the USB ESD array (keep designator D1)
  • Select D1 and Replace with TPD4E02B04DQAR.
  • Keep the same net mapping:
    • D+ side: J1:DP1/DP2 -> D1:IO1 -> series R6 -> U1:PA12.
    • D- side: J1:DN1/DN2 -> D1:IO2 -> series R7 -> U1:PA11.
    • Ground: connect both D1:G pins to GND. Leave D1:IO3/IO4 NC.
  • Per the knowledge base: use bidirectional TVS and keep capacitance below 1 pF per line. TPD4E02B04 meets this.
  1. Replace the USB‑C receptacle (keep designator J1)
  • Select J1 and Replace with USB4105-GF-A (GCT USB‑C 2.0).
  • Preserve nets:
    • DP1/DP2 = D+, DN1/DN2 = D-, CC1/CC2, VBUS_A/VBUS_B, and the shell to GND where applicable.
  • Mechanical check after swap:
    • Keep J1 top‑center; ensure the TH lugs clear copper; re-run DRC to catch any courtyard or overlap issues.
    • If you prefer stronger retention in the future, consider USB4125-GF-A (heavier lugs), but USB4105 is a good default and commonly stocked.
  1. Recheck availability
  • Open the Review panel and run the parts availability check.
  • You should now see D1 and J1 with explicit stock data; the rest of the BOM should remain green.
Quick acceptance checklist after swaps
  • D1 is TPD4E02B04DQAR; both G pins to GND; IO3/IO4 left NC.
  • J1 pins map correctly (DP/DM, CC1/CC2, VBUS_A/B, GND). No DRC shorts at the new lugs.
  • USB path: Connector -> ESD -> R6/R7 -> U1; short and symmetric.
  • Availability review: no blockers remaining.
If you’d like, tell me once you’ve completed these two replacements and I’ll summarize any remaining DRC or availability items to close out before routing.
Confirm final ESD/layout details
Ask about USB differential routing
Clarify connector shell grounding
Check BOM cost sensitivity
Next step on power design
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MCU Footprint Update – Verified with No New DRC Violations

Properties

Ω
A
A
mm
Diagram



  
    
  
  
    
  

















"STM32G431CBU6 MCU"
"TMS37157 RFID Front-End"
"MCP1825 3.3V Regulator"
"USB-C Interface"
"External Antenna\nConnector (ANT+/ANT-)"
"TPD4E02 ESD Protection"
"NP0/C0G Tuning Kit\n470pF + Trim Caps (100pF,47pF,22pF) and Optionals (390pF,510pF)"
mm
mm

Pricing & Availability

Distributor

Qty 1

Arrow

$6.49–$136.60

Digi-Key

$7.28–$125.92

LCSC

$5.42–$20.65

Mouser

$8.34–$42.67

TME

$0.77

Verical

$4.55–$54.79

Controls