AI01C from Sam wing, in a SOT-23-6L. 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	OUT	output	Key-detect output. Behavior is selected by MD: MD=floating gives an open-drain active-low output (requires external pull-up, e.g. 10 kΩ); MD=VDD gives push-pull active-high direct output; MD=GND gives a toggle/latch output (each press flips the state). Output sink current up to 10 mA at VCC=5 V; low-level output impedance ~50 Ω, high-Z ~100 MΩ.
2	GND	power_in	Ground / negative supply reference (0 V).
3	KEY	input	Capacitive touch sense input. Connect to the touch pad/electrode through a series resistor RX (recommended 2 kΩ, range 0-5 kΩ). An optional CSEL capacitor (0-10 pF) from this pin to GND trims sensitivity; smaller CSEL = higher sensitivity, floating = maximum sensitivity.
4	MD	input	Mode-select input with three states: floating = open-drain active-low output on OUT (needs external pull-up); tied to VDD = push-pull active-high direct output; tied to GND = toggle/latch (self-locking) output starting at low.
5	VDD	power_in	Positive supply input, 2.5 V to 6.5 V. Typical Idd ≈ 666 µA at 5 V, 394 µA at 3 V (active); ~11 µA (5 V) / ~7 µA (3 V) in sleep. A 20 Ω series resistor between the board VDD rail and this pin is recommended (do not omit), and a 100 nF decoupling cap should be placed as close as possible to the pin.
6	C1	passive	Internal reference-capacitor connection. Connect a 4.7 nF capacitor (allowable range 1 nF - 10 nF) from this pin to GND, placed close to the chip. Required for correct capacitive sensing operation.

Key specifications

Parameter	Value
Manufacturer	Sam wing
Package	SOT-23-6L
Category	Sensor
Pins	6

CAD (KiCad official)

Symbol: AI01C
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ai01c.step`	97 KB	You want the bare part, or you mark your own boards.
`ai01c-etched.step`	1.0 MB	You want the part with `AI01C` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 271 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: Sam wing datasheet (8 pp, sha256 ae24d6c8172491d8, 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