TS5A3166DCKR from Texas Instruments, in a SC-70-5. 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	NO	passive	Normally opened analog port of the SPST switch. Signal range 0 V to V+. ON-state resistance typically 0.9 Ω at 4.5 V; supports up to ±200 mA ON-state switch current.
2	COM	passive	Common analog port of the SPST switch. Connects to NO when IN is asserted high. Signal range 0 V to V+.
3	GND	power_in	Ground reference for the device. Continuous current through GND limited to −100 mA.
4	IN	input	Digital control input to connect COM to NO. Logic high (VIH ≥ 2.4 V at 5 V supply, 5.5-V tolerant) closes the switch; logic low (VIL ≤ 0.8 V) opens it. Control input range 0 V to 5.5 V.
5	V+	power_in	Positive power supply. Operating range 1.65 V to 5.5 V (absolute max 6.5 V). Continuous current through V+ limited to 100 mA. Bypass with a 0.1-µF ceramic to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SC-70-5
Category	Interface
Pins	5

Ordering variants

Same part, different packaging or reel option.

TS5A3166DCKR
TS5A3166DCKRDCKT
TS5A3166DCKRDBVR
TS5A3166DCKRDBVT
TS5A3166DCKRYZPR

CAD (KiCad official)

Symbol: TS5A3166DCKR
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SC-70-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ts5a3166dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`ts5a3166dckr-etched.step`	2.4 MB	You want the part with `TS5A3166DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 585 faces against 102 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: Texas Instruments datasheet (36 pp, sha256 1f2ead12bd7ceb71, retrieved 2026-08-17, tier: manufacturer)
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