component
TL431IYDT
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STMicroelectronics Voltage Reference, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL431IYDT
STMicroelectronics · Voltage Reference · SO-8
TL431IYDT from STMicroelectronics, in a SO-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 | passive | Cathode of the shunt reference, operating range Vref to 36 V (37 V absolute max) with 1 to 100 mA cathode current. |
| 2 | Anode | power_in | Anode of the shunt reference, connected to the circuit ground/lowest potential. |
| 3 | Anode | power_in | Unlabeled in Figure 2 but drawn tied internally to the anode net (red junction dot), so treated as anode. |
| 4 | NC | unconnected | No internal connection. |
| 5 | NC | unconnected | No internal connection. |
| 6 | Anode | power_in | Unlabeled in Figure 2 but drawn tied internally to the anode net (red junction dot), so treated as anode. |
| 7 | Anode | power_in | Anode of the shunt reference, connected to the circuit ground/lowest potential. |
| 8 | Ref | input | Reference input that sets the output voltage via an external divider, with Vref typically 2.495 V and reference input current range -0.05 to +10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
TL431IYDT - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
tl431iydt-etched.step/tl431iydt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431iydt.step/tl431iydt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (22 pp, sha256
d174b1869a9d426d, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# TL431IYDT
**STMicroelectronics** · Voltage Reference · SO-8
TL431IYDT from STMicroelectronics, in a SO-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 | passive | Cathode of the shunt reference, operating range Vref to 36 V (37 V absolute max) with 1 to 100 mA cathode current. |
| 2 | Anode | power_in | Anode of the shunt reference, connected to the circuit ground/lowest potential. |
| 3 | Anode | power_in | Unlabeled in Figure 2 but drawn tied internally to the anode net (red junction dot), so treated as anode. |
| 4 | NC | unconnected | No internal connection. |
| 5 | NC | unconnected | No internal connection. |
| 6 | Anode | power_in | Unlabeled in Figure 2 but drawn tied internally to the anode net (red junction dot), so treated as anode. |
| 7 | Anode | power_in | Anode of the shunt reference, connected to the circuit ground/lowest potential. |
| 8 | Ref | input | Reference input that sets the output voltage via an external divider, with Vref typically 2.495 V and reference input current range -0.05 to +10 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## CAD (KiCad official)
- Symbol: `TL431IYDT`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `tl431iydt-etched.step` / `tl431iydt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431iydt.step` / `tl431iydt.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588925348537253888) (22 pp, sha256 `d174b1869a9d426d`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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](docs/tl431iydt-datasheet.pdf)