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CJ431 ±0.5%
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Changjing Voltage Reference, TO-92-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# CJ431 ±0.5%++**Changjing** · Voltage Reference · TO-92-3++CJ431 ±0.5% from Changjing, in a TO-92-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | REF | input | Reference input. High-impedance input to the internal error amplifier; the device sinks cathode current to regulate this pin to Vref ≈ 2.5 V (2.487-2.513 V for the ±0.5% grade). Typical bias current 1.5 µA (max 4 µA). |+| 2 | A | power_in | Anode. Return path of the shunt regulator, normally tied to circuit ground/common. Cathode current flows from K to A when the device is in regulation. |+| 3 | K | power_in | Cathode. Regulated node; sinks 1 mA to 100 mA (absolute max 150 mA) up to VKA = 36 V. Connected to the supply through a series resistor in typical shunt-regulator use. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | TO-92-3 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `CJ431 ±0.5%CJ431 (marking '431')`+- `CJ431 ±0.5%CJ431 (marking 'CJ431')`+- `CJ431 ±0.5%CJ431 (bulk)`+- `CJ431 ±0.5%CJ431-TA (tape)`+- `CJ431 ±0.5%CD431 (marking 'CD431')`++## CAD (KiCad official)++- Symbol: `CJ431 ±0.5%`+- Footprint: `Package_TO_SOT_THT:TO-92_Inline`+- 3D model: TO-92-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj431-0-5-datasheet.pdf) (9 pp, sha256 `68a405075950c4b5`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cj431-0-5-datasheet.pdf)
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