component
TL431BIDR
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
markdownTL431BIDR
Texas Instruments · Voltage Reference · SOIC-8
TL431BIDR from Texas Instruments, in a SOIC-8. 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 | output | Adjustable parallel regulator output supporting 0.4-100 mA continuous sink current over 2.5 V to 36 V range. |
| 2 | ANODE | power_in | Negative supply reference (ground) pin; connect to system ground or negative rail. |
| 3 | ANODE | power_in | Negative supply reference (ground) pin; connect to system ground or negative rail. |
| 4 | NC | unconnected | No internal connection; may be connected to ANODE or left open per application requirements. |
| 5 | NC | unconnected | No internal connection; may be connected to ANODE or left open per application requirements. |
| 6 | ANODE | power_in | Negative supply reference (ground) pin; connect to system ground or negative rail. |
| 7 | ANODE | power_in | Negative supply reference (ground) pin; connect to system ground or negative rail. |
| 8 | REF | input | Reference voltage input with internal 2.5 V threshold; requires 2-4 µA minimum input bias current from threshold to ANODE. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
TL431BIDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
tl431bidr-etched.step/tl431bidr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431bidr.step/tl431bidr.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 2026-09-22, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).