component
TL431QDR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOIC-8. 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
markdownTL431QDR
Texas Instruments · Voltage Reference · SOIC-8
TL431QDR from Texas Instruments, in a SOIC-8. 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 | output | Cathode (shunt output) terminal; provides regulated voltage from Vref (2.495V typ.) to 36V with sink current capability of 1-100 mA continuous |
| 2 | ANODE | power_in | Anode (common return/ground) reference terminal; must be connected to circuit ground |
| 3 | ANODE | power_in | Anode (common return/ground) reference terminal; must be connected to circuit ground |
| 4 | NC | unconnected | No internal connection; can be left open or connected to ground |
| 5 | NC | unconnected | No internal connection; can be left open or connected to ground |
| 6 | ANODE | power_in | Anode (common return/ground) reference terminal; must be connected to circuit ground |
| 7 | ANODE | power_in | Anode (common return/ground) reference terminal; must be connected to circuit ground |
| 8 | REF | input | Reference input terminal; sets threshold voltage to Vref = 2.495V ±0.5% (typ. at 25°C) with required input bias current Iref = 2-4 µA |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
TL431QDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
tl431qdr-etched.step/tl431qdr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431qdr.step/tl431qdr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (86 pp, sha256
313277b9351e61ed, retrieved 2026-10-07, 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 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).