TTP223-BA6-TD from 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-detect output. Drives high or low on touch depending on the SLH level-select pin. Typical IOL = 10 mA at VOL = 0.6 V (VDD = 3 V); typical IOH = -6 mA at VOH = 2.4 V. Output response time up to 60 ms.
2	GND	power_in	Power ground (VSS). Reference for VDD and all logic levels.
3	SO	input	Touch sense input. Connects to the external touch pad through an optional 100-1000 ohm series resistor Rs; sensitivity is set by an external capacitor C1 (0-50 pF) from this pin to GND. Larger C1 lowers sensitivity (allows thicker overlay); smaller C1 raises sensitivity.
4	SLH	input	Output active-level select. Tie to GND for active-high output (output goes high on touch, low idle); tie to VDD for active-low output (output goes low on touch, high idle). Must NOT be left floating.
5	VDD	power_in	Positive supply, 2.0-5.5 V (typ 3.0 V). Typical IOP = 2.5 uA at VDD = 3.0 V (max 7.0 uA). Bypass with 100 nF + 10 uF close to the pin as shown in the application circuit.
6	STG	input	Mode-select input. Tie to GND for synchronous (momentary) output mode - output is asserted only while touched (max touch duration 6 s). Tie to VDD for toggle/level-latch (self-lock) mode - output toggles on each new touch. Must NOT be left floating.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TTP223-BA6-TD

CAD (KiCad official)

Symbol: TTP223-BA6-TD
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
`ttp223-ba6-td.step`	97 KB	You want the bare part, or you mark your own boards.
`ttp223-ba6-td-etched.step`	2.1 MB	You want the part with `TTP223-BA6-TD` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 524 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 datasheet (6 pp, sha256 e0bc622ae69999ff, 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