GX18B20UH
Public Unreviewedby Ray
GXCAS Temperature and Humidity Sensor, MSOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownGX18B20UH
GXCAS · Temperature and Humidity Sensor · MSOP-8
GX18B20UH from GXCAS, in a MSOP-8. 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 | DQ | bidirectional | 1-Wire data input/output. Open-drain bidirectional pin that carries all bus communication and, in parasite-power mode, also supplies operating current to the device (needs external ~4.7k pull-up, or a strong MOSFET pull-up during temperature conversion). |
| 2 | NC | unconnected | No connection. Leave floating or tie to ground per board convention. |
| 3 | NC | unconnected | No connection. |
| 4 | GND | power_in | Ground reference. |
| 5 | NC | unconnected | No connection. |
| 6 | NC | unconnected | No connection. |
| 7 | NC | unconnected | No connection. |
| 8 | VDD | power_in | Optional external supply, 2.5 V to 5.5 V. Tie to GND to operate in parasite-power mode (device is then powered from the DQ pin). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GXCAS |
| Package | MSOP-8 |
| Category | Sensor |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
GX18B20UHGX18B20UH-T&RGX18B20U-T&RGX18B20ZGX18B20Z-T&RGX18B20ZHGX18B20ZH-T&RGX18B20HGX18B20-BuGX18B20SGX18B20S-BuGX18B20WSGX18B20WSHGX18B20WS-BuGX1820TGX1820T-BuGX18B20U-TGX18B20UP-T&R
CAD (KiCad official)
- Symbol:
GX18B20UH - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
gx18b20uh.step |
123 KB | You want the bare part, or you mark your own boards. |
gx18b20uh-etched.step |
2.2 MB | You want the part with GX18B20UH already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 528 faces against 147 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: GXCAS datasheet (33 pp, sha256
5ccf9b30c1910e5c, 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).