# LM50CIM3X

**Texas Instruments** · Temperature and Humidity Sensor · SOT-23

LM50CIM3X from Texas Instruments, in a SOT-23. 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 | +Vs | power_in | Positive supply input. Operating range 4.5 V to 10 V (absolute max +12 V). Quiescent current is typically 130 µA (max 180 µA). |
| 2 | VO | output | Analog temperature output. VOUT = (10 mV/°C x Temp °C) + 500 mV, giving +100 mV at -40°C, +750 mV at +25°C, and +1.75 V at +125°C. Output resistance typically 2 kΩ (max 4 kΩ). |
| 3 | GND | power_in | Ground / supply return. The die backside is directly attached to this pin for good thermal conductivity to the PCB. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 |
| Category | Sensor |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `LM50CIM3X`
- `LM50CIM3XQIM3`
- `LM50CIM3XQIM3X`
- `LM50CIM3XBIM3`
- `LM50CIM3XBIM3X`

## CAD (KiCad official)

- Symbol: `LM50CIM3X`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm50cim3x-etched.step` / `lm50cim3x-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm50cim3x.step` / `lm50cim3x.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`lm50cim3x.step`](lm50cim3x.step) | 59 KB | You want the bare part, or you mark your own boards. |
| [`lm50cim3x-etched.step`](lm50cim3x-etched.step) | 1.5 MB | You want the part with `LM50CIM3X` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 385 faces against 69 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm50cim3x.pdf) (15 pp, sha256 `dc1fdab2ae4b8f03`, retrieved 2026-08-17, tier: manufacturer)
- **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/lm50cim3x-datasheet.pdf)