component
TL431CL3T
Public Made by Adomby adom
STMicroelectronics Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTL431CL3T
STMicroelectronics · Voltage Reference · SOT-23-3
TL431CL3T from STMicroelectronics, in a SOT-23-3. 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/adjust voltage input; sets output voltage via external resistor divider; Iref = 1.8 µA typ, 4 µA max at Ik = 10 mA, Tamb = 25 °C; operating range 0 °C to +70 °C for TL431C. |
| 2 | ANODE | passive | Anode (current-return terminal) of the shunt regulator; typically connected to GND; VKA is measured from cathode to this pin with an operating range of Vref to 36 V and absolute maximum of 37 V. |
| 3 | CATHODE | passive | Cathode of the adjustable shunt voltage reference; sinks 1 to 100 mA to regulate VKA; Vref = 2.495 V typ (2% accuracy), dynamic impedance ZKA = 0.22 Ω typ at Ik = 1 to 100 mA, f ≤ 1 kHz. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431CL3T - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431cl3t-etched.step/tl431cl3t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431cl3t.step/tl431cl3t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (22 pp, sha256
d174b1869a9d426d, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).