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LM431AIZ
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Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# LM431AIZ++**Texas Instruments** · Voltage Reference · TO-92-3++LM431AIZ from Texas Instruments, in a TO-92-3. 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 | Cathode | bidirectional | Shunt current/output voltage pin; the datasheet limits cathode voltage to 37 V and continuous cathode current to -10 to 150 mA absolute maximum, with 1 to 100 mA recommended. |+| 2 | Reference | input | Reference pin for setting the adjustable output voltage (VREF is 2.5 V typical per the device description), with reference input current limited to 10 mA absolute maximum. |+| 3 | Anode | power_in | Anode pin, normally grounded; the datasheet lists it as an output (O) type, but it is classed here as power_in because it is the normally grounded common terminal. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TO-92-3 |+| Category | Power Management (PMIC) |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `LM431AIZ`+- Footprint: `Package_TO_SOT_THT:TO-92_Inline`+- 3D model: TO-92-3 (KiCad packages3D, STEP)+- 3D model files: `lm431aiz-etched.step` / `lm431aiz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm431aiz.step` / `lm431aiz.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/lm431) (37 pp, sha256 `9c0bcff4967eaad2`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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](docs/lm431aiz-datasheet.pdf)
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