component
TL431ACPK
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Texas Instruments Voltage Reference, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+40@@ -0,0 +1,40 @@+# TL431ACPK++**Texas Instruments** · Voltage Reference · SOT-89-3++TL431ACPK from Texas Instruments, in a SOT-89-3. 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 | REF | input | Reference input threshold pin at 2495mV (±0.5% AC grade tolerance) requiring ≥4μA bias current; external resistor divider network on this pin programs output voltage from 2.5V to 36V. |+| 2 | ANODE | power_in | Substrate-connected common reference pin (typically grounded); establishes voltage baseline for reference input comparison and output voltage measurement; supports 1-100mA cathode sinking current range. |+| 3 | CATHODE | output | Parallel shunt regulator output node (Vref to 36V range) sinking 1-100mA regulated current with typical 0.2Ω dynamic impedance at 1kHz; output voltage set by external resistor network on REF pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOT-89-3 |+| Category | Power Management (PMIC) |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `TL431ACPK`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-3 (KiCad packages3D, STEP)+- 3D model files: `tl431acpk-etched.step` / `tl431acpk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431acpk.step` / `tl431acpk.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tl431) (86 pp, sha256 `313277b9351e61ed`, retrieved 2026-09-26, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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](docs/tl431acpk-datasheet.pdf)
page.jsonadded+128@@ -0,0 +1,128 @@+{+ "slug": "tl431acpk",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Voltage Reference, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "tl431acpk",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "tl431acpk.kicad_sym",+ "tl431acpk.kicad_mod",+ "tl431acpk.glb",+ "tl431acpk.step",+ "tl431acpk.lbr",+ "docs/hero.png",+ "docs/tl431acpk-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "TL431ACPK",+ "manufacturer": "Texas Instruments",+ "package": "SOT-89-3",+ "pin_count": 3,+ "category": "Power Management (PMIC)",+ "subcategory": "Voltage Reference",+ "datasheet": "https://www.ti.com/cn/lit/gpn/tl431",+ "parts": {+ "symbol": "tl431acpk.kicad_sym",+ "footprint": "tl431acpk.kicad_mod",+ "model_3d": "tl431acpk-etched.glb",+ "model_3d_plain": "tl431acpk.glb",+ "model_3d_step": "tl431acpk-etched.step",+ "model_3d_step_plain": "tl431acpk.step",+ "lbr": "tl431acpk.lbr"+ },+ "distributor_links": {+ "lcsc": "C2156529",+ "digikey": "296-17037-2-ND",+ "mouser": "595-TL431ACPK"+ },+ "distributor_check": {+ "checked_at": "2026-09-26T19:47:30Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-17037-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-TL431ACPK",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "REF",+ "type": "input",+ "description": "Reference input threshold pin at 2495mV (±0.5% AC grade tolerance) requiring ≥4μA bias current; external resistor divider network on this pin programs output voltage from 2.5V to 36V."+ },+ {+ "number": "2",+ "name": "ANODE",+ "type": "power_in",+ "description": "Substrate-connected common reference pin (typically grounded); establishes voltage baseline for reference input comparison and output voltage measurement; supports 1-100mA cathode sinking current range."+ },+ {+ "number": "3",+ "name": "CATHODE",+ "type": "output",+ "description": "Parallel shunt regulator output node (Vref to 36V range) sinking 1-100mA regulated current with typical 0.2Ω dynamic impedance at 1kHz; output voltage set by external resistor network on REF pin."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: SOT-89 (PK) package mechanical outline drawing not included in provided datasheet pages; pin numberi; Pin 2 (ANODE) has substrate connection per package note; substrate must be connected to ANODE pin or"+ ],+ "pages_sent": 86,+ "cost_usd": 0.7121,+ "at": "2026-09-26T19:47:15"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/tl431",+ "pages": 86,+ "sha256": "313277b9351e61ed",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 3,+ "described": 3,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}