component

TL431AIYDT

Public Made by Adom

by adom

STMicroelectronics Voltage Reference, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431aiydtfactory-2.0.0extractor-text

Verified TL431AIYDT

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: TL431AIYDT · SO-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 21-page datasheet
  • ✓distributor: lcsc C315145, digikey 497-10179-2-ND, mouser 511-TL431AIYDT
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-0n8n5zrp/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ tl431aiydt.kicad_sym✓ tl431aiydt.kicad_mod✓ tl431aiydt.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 1d ago
viewers tl431aiydt: viewers · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
tl431aiydt-etched.glb Publish 0.1.0 · Ray 1d ago
tl431aiydt-etched.step tl431aiydt: factory component page (tier=mfr) · Ray 1d ago
tl431aiydt-hero.glb tl431aiydt: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
tl431aiydt-hero.overlay.json Publish 0.1.0 · Ray 1d ago
tl431aiydt.glb Publish 0.1.0 · Ray 1d ago
tl431aiydt.kicad_mod Publish 0.1.0 · Ray 1d ago
tl431aiydt.kicad_sym Publish 0.1.0 · Ray 1d ago
tl431aiydt.lbr Publish 0.1.0 · Ray 1d ago
tl431aiydt.step Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 1d ago

TL431AIYDT

STMicroelectronics · Voltage Reference · SO-8

TL431AIYDT from STMicroelectronics, in a SO-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Cathode passive Cathode of the shunt reference, with cathode-to-anode voltage of Vref to 36 V (37 V absolute maximum) and operating cathode current of 1 to 100 mA.
2 Anode passive Anode of the shunt reference, which is the return (ground-side) terminal for the cathode current.
3 Unlabeled (anode net) passive Pin is not labeled in Figure 2 and is drawn connected to the internal anode net, so its function is not stated in the datasheet.
4 NC unconnected No internal connection.
5 NC unconnected No internal connection.
6 Unlabeled (anode net) passive Pin is not labeled in Figure 2 and is drawn connected to the internal anode net, so its function is not stated in the datasheet.
7 Anode passive Second anode pin of the shunt reference, connected to the same anode terminal as pin 2.
8 Ref input Reference input that sets the output voltage between 2.5 and 36 V through an external R1/R2 divider, with reference input current range of -0.05 to +10 mA.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-8
Category Power Management (PMIC)
Pins 8

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PPA 01-Nov-2005 2 PPAP references inserted in order codes table on cover page. 20

CAD (KiCad official)

  • Symbol: TL431AIYDT
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: tl431aiydt-etched.step / tl431aiydt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431aiydt.step / tl431aiydt.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (21 pp, sha256 2ad815e4b80d91e6, retrieved 2026-11-05, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF