# GX112S

**GXCAS** · Temperature and Humidity Sensor · SOT-563

GX112S from GXCAS, in a SOT-563. 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 | SCL | input | Serial clock input for SMBus / I2C interface. Open-drain, requires an external pull-up resistor (4.7 kΩ recommended). Fast mode up to 400 kHz, high-speed mode up to 2.75 MHz. |
| 2 | GND | power_in | Ground reference (0 V) for the device. |
| 3 | ALERT | output | Over-temperature alert output. Open-drain, requires an external pull-up resistor (4.7 kΩ recommended). Polarity (active-low/high) and comparator/interrupt mode are software-configurable via POL and TM bits. |
| 4 | ADD0 | input | I2C slave address select. Tie to V+, GND, SCL, or SDA to select one of four possible bus addresses, allowing up to four GX112 devices on the same bus. |
| 5 | V+ | power_in | Positive supply voltage input, 1.4 V to 5.5 V (3.3 V nominal). Absolute maximum 6 V. Power-on reset threshold typ 1.1 V. |
| 6 | SDA | bidirectional | Serial data line for SMBus / I2C interface. Open-drain, requires an external pull-up resistor (4.7 kΩ recommended). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GXCAS |
| Package | SOT-563 |
| Category | Sensor |
| Pins | 6 |

## Ordering variants

Same part, different packaging or reel option.

- `GX112S-T&R`
- `GX112D-T&R`

## CAD (KiCad official)

- Symbol: `GX112S`
- Footprint: `Package_TO_SOT_SMD:SOT-563`
- 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files: `gx112s-etched.step` / `gx112s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gx112s.step` / `gx112s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GXCAS datasheet](docs/gx112s-datasheet.pdf) (23 pp, sha256 `44b38d392e1ec25d`, 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/gx112s-datasheet.pdf)