component

TL1431QDR

Public Made by Adom

by adom

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

componentpower management (pmic)tl1431qdrfactory-2.0.0extractor-text

Verified TL1431QDR

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: TL1431QDR · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 41-page datasheet
  • ✓distributor: lcsc C2156579, digikey 296-17021-2-ND, mouser 595-TL1431QDR
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-8w4yv2m9/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ tl1431qdr.kicad_sym✓ tl1431qdr.kicad_mod✓ tl1431qdr.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 3h ago
viewers tl1431qdr: viewers · Ray 3h ago
package.json Publish 0.1.0 · Ray 3h ago
page.json Set visibility: public · Ray 3h ago
README.md Publish 0.1.0 · Ray 3h ago
tl1431qdr-etched.glb Publish 0.1.0 · Ray 3h ago
tl1431qdr-etched.step tl1431qdr: factory component page (tier=mfr) · Ray 3h ago
tl1431qdr-hero.glb tl1431qdr: hero GLB from the etched model (keeps the MPN mark) · Ray 3h ago
tl1431qdr-hero.overlay.json Publish 0.1.0 · Ray 3h ago
tl1431qdr.glb Publish 0.1.0 · Ray 3h ago
tl1431qdr.kicad_mod Publish 0.1.0 · Ray 3h ago
tl1431qdr.kicad_sym Publish 0.1.0 · Ray 3h ago
tl1431qdr.lbr Publish 0.1.0 · Ray 3h ago
tl1431qdr.step Publish 0.1.0 · Ray 3h ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 3h ago

TL1431QDR

Texas Instruments · Voltage Reference · SOIC-8

TL1431QDR 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 bidirectional Shunt current/voltage input; the datasheet limits cathode current to 1 mA to 100 mA under recommended operating conditions and -100 mA to 150 mA as an absolute maximum.
2 ANODE power_in Common pin normally connected to ground, and all voltage values are referenced to ANODE.
3 ANODE power_in Common pin normally connected to ground, and all voltage values are referenced to ANODE; ANODE terminals are connected internally.
4 NC unconnected No internal connection.
5 NC unconnected No internal connection.
6 ANODE power_in Common pin normally connected to ground, and all voltage values are referenced to ANODE; ANODE terminals are connected internally.
7 ANODE power_in Common pin normally connected to ground, and all voltage values are referenced to ANODE; ANODE terminals are connected internally.
8 REF input Threshold input relative to common ground; the reference input current is limited to -0.05 mA to 10 mA as an absolute maximum.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reference input voltage VI(ref) 2490 2500 2510 mV VKA = VI(ref), TA = 25°C 6
Reference input voltage over temperature VI(ref) 2470 2530 mV VKA = VI(ref), TA = -40°C to 125°C 6
Deviation of reference input voltage over full temperature range VI(dev) 17 55 mV VKA = VI(ref), TA = -40°C to 125°C 6
Ratio of change in reference input voltage to change in cathode voltage ΔVKA/ΔVI(ref) -1.1 -2 mV/V ΔVKA = 3V to 36V, TA = -40°C to 125°C 6
Reference input current II(ref) 1.5 2.5 µA R1 = 10kΩ, R2 = ∞, TA = 25°C 6
Reference input current over temperature II(ref) 4 µA R1 = 10kΩ, R2 = ∞, TA = -40°C to 125°C 6
Deviation of reference input current over full temperature range II(dev) 0.5 2 µA R1 = 10kΩ, R2 = ∞, TA = -40°C to 125°C 6
Minimum cathode current for regulation Imin 0.45 1 mA VKA = VI(ref), TA = 25°C 6
Off-state cathode current Ioff 0.18 0.5 µA VKA = 36V, VI(ref) = 0, TA = 25°C 6
Off-state cathode current over temperature Ioff 2 µA VKA = 36V, VI(ref) = 0, TA = -40°C to 125°C 6
Output impedance /zKA/ 0.2 0.4 Ω VKA = VI(ref), f ≤ 1kHz, IKA = 1mA to 100mA, TA = 25°C 6
Cathode voltage VKA 36 V Minimum is VI(ref) 4
Cathode current IKA 1 100 mA 4
Operating free-air temperature, TL1431Q TA -40 125 °C TL1431Q 4
Cathode voltage VKA 37 V with respect to ANODE 4
Continuous cathode current IKA -100 150 mA 4
Reference input current II(ref) -0.05 10 mA 4
Lead temperature 260 °C 1.6mm (1/16in) from case for 10s 4
Junction temperature TJ 150 °C 4
Storage temperature Tstg -65 150 °C 4
Electrostatic discharge, human-body model V(ESD) -2000 2000 V HBM, per ANSI/ESDA/JEDEC JS-001 4
Electrostatic discharge, charged-device model V(ESD) -1000 1000 V CDM, per JEDEC JESD22-C101 4
Junction-to-ambient thermal resistance (D, SOIC) RθJA 114.7 °C/W 4
Junction-to-case (top) thermal resistance (D, SOIC) RθJC(top) 59 °C/W 4
Junction-to-board thermal resistance (D, SOIC) RθJB 55.4 °C/W 4
Junction-to-top characterization parameter (D, SOIC) ψJT 12 °C/W 4
Junction-to-board characterization parameter (D, SOIC) ψJB 54.8 °C/W 4

CAD (KiCad official)

  • Symbol: TL1431QDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: tl1431qdr-etched.step / tl1431qdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl1431qdr.step / tl1431qdr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (41 pp, sha256 482f5ddecabc080b, retrieved 2026-11-05, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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