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CH443K

Public Made by Adom

by adom

WCH Jiangsu Qin Heng Analog Switches, Multiplexers, SC-70-6(SOT-363). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs ch443k: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
ch443k-etched.fit.json ch443k: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
ch443k-etched.glb ch443k: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
ch443k-etched.step ch443k: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
ch443k.glb Publish 0.1.0 · Ray 1mo ago
ch443k.kicad_mod Publish 0.1.0 · Ray 1mo ago
ch443k.kicad_sym Publish 0.1.0 · Ray 1mo ago
ch443k.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 6 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
ch443k.step Publish 0.1.0 · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 11d ago
README.md ch443k: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 17d ago

CH443K

WCH Jiangsu Qin Heng · Analog Switches, Multiplexers · SC-70-6(SOT-363)

CH443K from WCH Jiangsu Qin Heng, in a SC-70-6(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 CH1 passive Analog switch throw #2 (S2B). Connected to COM when SEL = high. Recommended analog signal range 0 to 2.8 V (VANA), absolute limit -0.3 to VCC+0.3 V. Ron ≈ 5 Ω typ.
2 GND power_in Common ground, digital signal reference.
3 CH0 passive Analog switch throw #1 (S1B). Connected to COM when SEL = low. Recommended analog signal range 0 to 2.8 V (VANA), absolute limit -0.3 to VCC+0.3 V. Ron ≈ 5 Ω typ.
4 COM passive Common pole (DB) of the SPDT analog switch. Routed to CH0 when SEL=0 and to CH1 when SEL=1. Bidirectional analog path.
5 VCC power_in Positive supply. Rated 5 V (operating 4.0-5.5 V), abs max 6.5 V. Static ICC ≈ 0.1 µA typ with digital pins tied to rails.
6 SEL input Digital channel-select input. SEL=low selects CH0→COM; SEL=high selects CH1→COM. VIL max 1.0 V, VIH min 2.0 V (referenced to VCC).

Key specifications

Parameter Value
Manufacturer WCH Jiangsu Qin Heng
Package SC-70-6(SOT-363)
Category Interface
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • CH443K

CAD (KiCad official)

  • Symbol: CH443K
  • Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
  • 3D model: SC-70-6(SOT-363) (KiCad packages3D, STEP)
  • 3D model files: ch443k-etched.step / ch443k-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch443k.step / ch443k.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ch443k.step 99 KB You want the bare part, or you mark your own boards.
ch443k-etched.step 1.2 MB You want the part with CH443K already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 323 faces against 117 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: WCH Jiangsu Qin Heng datasheet (16 pp, sha256 608400255c2b0865, 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