M1820B

@@ -0,0 +1,39 @@+# M1820B++**Mysentech** · Temperature and Humidity Sensor · TO-92S++M1820B from Mysentech, in a TO-92S. 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 | GND | power_in | Ground reference (0 V) for the chip. Connect to the system ground plane. |+| 2 | DQ | bidirectional | 1-Wire single-bus data I/O. Open-drain/tri-state pin: requires an external pull-up resistor (typ 4.7 kΩ, 1-10 kΩ; use 1 kΩ for long cables or multi-drop). VIL ≤ 0.3·VDD, VIH ≥ 0.7·VDD; VOL ≤ 0.4 V at IOL = −3 mA. Bus idle state is high; a hold-low > 480 µs resets all devices on the bus. |+| 3 | VDD | power_in | Positive supply, 1.8-5.5 V (typ 3.3 V; absolute max 6 V). IDD ≈ 0.1 µA idle (single-shot mode), 450 µA peak during conversion, 4.8 µA average at 1 measurement/s. For long cables or multi-drop networks keep VDD ≥ 3.3 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Mysentech |+| Package | TO-92S |+| Category | Sensor |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `M1820B`+- Footprint: `Package_TO_SOT_THT:TO-92_Inline`+- 3D model: TO-92S (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Mysentech datasheet](docs/m1820b-datasheet.pdf) (28 pp, sha256 `aeda39d8ec9e0fa0`, 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).++[Datasheet PDF](docs/m1820b-datasheet.pdf)

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