component

TL431QDR

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Texas Instruments Voltage Reference, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431qdrfactory-2.0.0extractor-text
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TL431QDR

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431qdr.step / tl431qdr.glb are 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, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF