component
CJ431K
Public Made by Adomby adom
Changjing Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+42@@ -0,0 +1,42 @@+# CJ431K++**Changjing** · Voltage Reference · SOT-23++CJ431K from Changjing, in a SOT-23. 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. Internally compared to the 2.5V bandgap reference (Vref = 2.470-2.520 V typ). Drives the shunt element on when REF exceeds Vref. Reference input current is ~1.5 µA typ (4 µA max). |+| 2 | CATHODE | passive | Cathode (K) of the shunt regulator. Sinks 1-100 mA in the on state; VKA max 37 V, IKA range −100 to +150 mA. Off-state cathode current is 0.5 µA max at VKA = 40 V, Vref = 0. |+| 3 | ANODE | passive | Anode (A) of the shunt regulator, connected to the low-side / ground return of the shunt current path. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-23 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `CJ431KK`++## CAD (KiCad official)++- Symbol: `CJ431K`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj431k-datasheet.pdf) (6 pp, sha256 `f02682f21931ad72`, 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/cj431k-datasheet.pdf)
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