CH410K

@@ -0,0 +1,46 @@+# CH410K++**WCH Jiangsu Qin Heng** · Supervisor and Reset ICs · SOT-363++CH410K from WCH Jiangsu Qin Heng, in a SOT-363. 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 | HV | input | Threshold voltage select (analog input). Leave floating (do NOT tie to GND) to select the 2.3 V low-voltage threshold; short to VCC to select the 3.0 V high-voltage threshold. Internal comparator is non-precision with some spread. |+| 2 | GND | power_in | Common ground / return. |+| 3 | RSTH | output | Active-HIGH power-on / low-voltage reset output, push-pull. Held high during power-up and brown-out, switches low after the Trhd delay (typ 20 ms) once VCC is above threshold. Drives 5 mA VOH ≥ VCC-0.5 V / 8 mA VOL ≤ 0.5 V. |+| 4 | RSTL | output | Active-LOW power-on / low-voltage reset output, open-drain. Pulled low during power-up and brown-out, releases to Hi-Z after the Trld delay (typ 40 ms). Typically needs an external pull-up (e.g. to VOUT) when driving an MCU active-low RESET. |+| 5 | VCC | power_in | Positive supply input, monitored rail. Operating range 1.0 V to 5.3 V (absolute max 6.0 V). External decoupling capacitor is recommended to be at least 5× the VOUT load capacitor. |+| 6 | VOUT | power_out | Switched power output, push-pull, with built-in low-voltage discharge. Turns on Tvd (typ 5 ms) after VCC crosses the threshold and discharges within ~0.02 µs of VCC dropping below threshold. Supplies up to 40 mA with a ~35-60 mV drop from VCC; supports 0.1-10 µF load cap. Also usable as an active-low reset output. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | WCH Jiangsu Qin Heng |+| Package | SOT-363 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `CH410K`++## CAD (KiCad official)++- Symbol: `CH410K`+- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`+- 3D model: SOT-363 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [WCH Jiangsu Qin Heng datasheet](docs/ch410k-datasheet.pdf) (4 pp, sha256 `f072610f7f5e707b`, 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/ch410k-datasheet.pdf)

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