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gx21m15u
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GXCAS Temperature and Humidity Sensor, MSOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownGX21M15U
GXCAS · Temperature and Humidity Sensor · MSOP-8
GX21M15U 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 | SDA | bidirectional | I²C bus bidirectional data line; open-drain output requiring an external pull-up (≈10 kΩ typical). VOL ≤ 0.4 V at IOL = 3 mA. Do not leave floating. |
| 2 | SCL | input | I²C bus clock input, digital. Operates 20 Hz to 400 kHz, VIH ≥ 0.7·VCC, VIL ≤ 0.3·VCC, ~500 mV input hysteresis. Requires an external pull-up per I²C spec; do not leave floating. |
| 3 | OS | output | Overtemperature shutdown / interrupt output; open-drain. Asserts when temperature exceeds Tth(ots) (default 80 °C) and releases per comparator/interrupt mode configured in the Conf register. Polarity programmable (default active-low). Sink capability up to 10 mA (abs max); recommend pull-up up to 200 kΩ to minimize self-heating. |
| 4 | GND | power_in | Ground reference; connect to system ground. |
| 5 | A2 | input | I²C slave-address bit 2 (MSB of the 3 user address bits). Tie to GND (logic 0) or VCC (logic 1); no internal bias, must not float. Combined with the fixed '1001' upper nibble to form the 7-bit slave address (1001 A2 A1 A0). |
| 6 | A1 | input | I²C slave-address bit 1. Tie to GND or VCC; must not float. Part of the 7-bit slave address (1001 A2 A1 A0). |
| 7 | A0 | input | I²C slave-address bit 0 (LSB of the 3 user address bits). Tie to GND or VCC; must not float. Enables up to 8 devices on the same bus. |
| 8 | VCC | power_in | Supply voltage input; 2.8 V to 5.5 V recommended operating range (absolute max 6.0 V). Bypass with 0.1 µF decoupling capacitor to GND close to the pin. Typical supply current 80 µA (I²C idle), 0.2 µA in shutdown. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GXCAS |
| Package | MSOP-8 |
| Category | Sensor |
| Pins | 8 |
Ordering variants
GX21M15U-T&RGX21M15UGX21M15UGX21M15-T&RGX21M15UGX21M15D-T&RGX21M15UGX21M15D
CAD (KiCad official)
- Symbol:
GX21M15U - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GXCAS datasheet (None pp, sha256
a29f7f228c0cfe5c, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).