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Generated by kicad-footprint-generator · KiCad file format 20260206

Name	Last commit message	Last updated
docs	ch604asr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	3d 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
ch604asr-etched.fit.json	ch604asr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	3d ago
ch604asr-etched.glb	ch604asr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	3d ago
ch604asr-etched.step	ch604asr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	3d ago
ch604asr.glb	Publish 0.1.0 · Ray	1mo ago
ch604asr.kicad_mod	Publish 0.1.0 · Ray	1mo ago
ch604asr.kicad_sym	Publish 0.1.0 · Ray	1mo ago
ch604asr.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 -> 3 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
ch604asr.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	ch604asr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray	17d ago

CH604ASR

COSEMITECH · Hall Sensor · SOT-23-3L

CH604ASR from COSEMITECH, in a SOT-23-3L. 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	VDD	power_in	Supply voltage input. Operating range 3.0 V to 15 V (absolute max 18 V). Typical supply current 4 mA at 5 V. Recommend 100 nF decoupling capacitor to GND.
2	OUT	output	Ratiometric analog linear output proportional to magnetic flux density. Quiescent output = VDD/2 at B=0 (2.42-2.58 V at VDD=5 V). Sensitivity 2.5 mV/Gauss (CH604), sink capability ~1 mA, source capability ~2 mA at 5 V. Typical 4.7 nF load capacitor to GND.
3	GND	power_in	Ground reference pin.

Key specifications

Parameter	Value
Manufacturer	COSEMITECH
Package	SOT-23-3L
Category	Sensor
Pins	3

Ordering variants

Same part, different packaging or reel option.

CH604ASR
CH604ASRAER
CH604ASRATB

CAD (KiCad official)

Symbol: CH604ASR
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3L (KiCad packages3D, STEP)
3D model files: ch604asr-etched.step / ch604asr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch604asr.step / ch604asr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ch604asr.step`	59 KB	You want the bare part, or you mark your own boards.
`ch604asr-etched.step`	1.6 MB	You want the part with `CH604ASR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 392 faces against 69 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: COSEMITECH datasheet (9 pp, sha256 09dd7920174583b6, 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