# TS4061BILT-1.25

**STMicroelectronics** · Voltage Reference · SOT-23

TS4061BILT-1.25 from STMicroelectronics, in a SOT-23. 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 | K | passive | Cathode of the shunt reference, where the 1.25 V reverse breakdown voltage appears, with operating current from 10 µA minimum to 15 mA maximum (absolute maximum reverse breakdown current 20 mA). |
| 2 | A | passive | Anode of the shunt reference, the ground/return side, with absolute maximum forward current of 15 mA. |
| 3 | NC | unconnected | No-connect pin that must be left unconnected or connected to the anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TS4061BILT-1.25`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ts4061bilt-1-25-etched.step` / `ts4061bilt-1-25-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ts4061bilt-1-25.step` / `ts4061bilt-1-25.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/8588925454615396352) (15 pp, sha256 `25e6e265601c7aae`, retrieved 2026-10-06, tier: lcsc)
- **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](docs/ts4061bilt-1-25-datasheet.pdf)