# TSM101ACD

**STMicroelectronics** · Voltage Reference · SO-8

TSM101ACD 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 | Vref | power_in | 1.24V voltage reference output with 10mA maximum output current. |
| 2 | Csen | input | Current source enable input; current source is active when input voltage is below 0.8V. |
| 3 | Crref | input | Current limitation reference input. |
| 4 | GND | power_in | Ground. |
| 5 | Crin | input | Current limitation loop input connected to the voltage across the sense resistor. |
| 6 | OUTPUT | output | Output pin for voltage regulation and current limitation loops to drive an optocoupler. |
| 7 | Vrin | input | Voltage regulation loop input. |
| 8 | Vcc | power_in | Power supply input, 4.5V to 32V DC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TSM101ACD`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `tsm101acd-etched.step` / `tsm101acd-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tsm101acd.step` / `tsm101acd.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/8590226782491344896) (13 pp, sha256 `d54997d5346d0878`, retrieved 2026-10-07, 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/tsm101acd-datasheet.pdf)