# CH912LSR

**COSEMITECH** · Hall Sensor · SOT-23-3L

CH912LSR from COSEMITECH, in a SOT-23-3L. 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 | VDD | power_in | Supply voltage input. Operating range 1.65V to 5.5V; absolute max 6V. Recommend 0.1uF decoupling capacitor to GND at the pin. |
| 2 | OUT | output | Push-pull digital output. Pulled low when |B| > Bop (typ ±33 Gauss) and driven high when |B| < Brp (typ ±23 Gauss). Sink/source capability 1 mA (VOL 0.2V max at 1mA, VOH VDD-0.2V min at -1mA). |
| 3 | GND | power_in | Ground reference pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | SOT-23-3L |
| Category | Sensor |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `CH912LSR`
- `CH912LSRTB`

## CAD (KiCad official)

- Symbol: `CH912LSR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `ch912lsr-etched.step` / `ch912lsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch912lsr.step` / `ch912lsr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSEMITECH datasheet](docs/ch912lsr-datasheet.pdf) (9 pp, sha256 `d1118d62b1014ac0`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ch912lsr-datasheet.pdf)