223B TDSEMIC from TDSEMIC 223B TDSEMIC, in a SOT-23-6. 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	Push-pull touch-detection output. Sources up to ~6 mA and sinks up to ~10 mA; output polarity and behavior (momentary vs latched) set by SLH and STG. Response time ~60 ms.
2	GND	power_in	Ground / VSS reference (0 V).
3	SO	input	Touch sense input. Connect to the touch pad; sensitivity is set by a 0-50 pF cap (C1) to ground, with an optional 100-1000 Ω series resistor (Rs) for EMI robustness. Sensor frequency ~500 kHz at VDD=3.0 V, no load.
4	SLH	input	Output active-level select (must NOT be left floating). Tie to GND: touch outputs high, idle low. Tie to VDD: touch outputs low, idle high. Output swing equals VDD.
5	VDD	power_in	Positive supply, 2.0-5.5 V (typ 3.0 V). Typical operating current 2.5 uA (max 7 uA) at VDD=3.0 V; decouple with 100 nF + 10 uF near the pin.
6	STG	input	Mode select (must NOT be left floating). Tie to GND: synchronous-output mode (momentary, output tracks touch, max touch time 6 s). Tie to VDD: level-toggle mode (self-lock; each touch inverts output, max touch time 6 s).

Key specifications

Parameter	Value
Manufacturer	TDSEMIC 223B TDSEMIC
Package	SOT-23-6
Category	Sensor
Pins	6

CAD (KiCad official)

Symbol: 223B TDSEMIC
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`223b-tdsemic.step`	97 KB	You want the bare part, or you mark your own boards.
`223b-tdsemic-etched.step`	2.1 MB	You want the part with `223B TDSEMIC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 525 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: TDSEMIC 223B TDSEMIC datasheet (6 pp, sha256 1329d729fa77cadd, 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