component
TL431CDBZR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+40@@ -0,0 +1,40 @@+# TL431CDBZR++**Texas Instruments** · Voltage Reference · SOT-23-3++TL431CDBZR from Texas Instruments, in a SOT-23-3. 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 | CATHODE | bidirectional | Shunt regulator current/voltage node (I/O): cathode voltage VKA is recommended to range from Vref to 36V with continuous cathode current IKA of 1mA to 100mA (absolute maximum VKA=37V, IKA=-100mA to 150mA); minimum regulated cathode current Imin is 0.4-1mA depending on grade. |+| 2 | REF | input | Reference input (I) that sets the threshold voltage relative to the common ANODE; the internal 2.5V (nominal 2440-2550mV depending on grade) reference requires a reference input current Iref of typically 2µA (max 4µA) and must not be left floating since absolute maximum reference input current range is -0.05mA to 10mA. |+| 3 | ANODE | output | Common pin (O) of the device, typically connected to circuit ground, providing the return path for the cathode and reference currents. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOT-23-3 |+| Category | Power Management (PMIC) |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `TL431CDBZR`+- Footprint: `Package_TO_SOT_SMD:SOT-23-3`+- 3D model: SOT-23-3 (KiCad packages3D, STEP)+- 3D model files: `tl431cdbzr-etched.step` / `tl431cdbzr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431cdbzr.step` / `tl431cdbzr.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 2026-09-23, 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-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/tl431cdbzr-datasheet.pdf)
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