NC7SB3157P6X from Tudi, in a SC-70-6. 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	NO	bidirectional	Normally-Open analog switch terminal. Connected to COM when the IN select input is high. Analog signal range from VSS to VDD; typical on-resistance 4.0Ω with ICOM = -10mA at VS = 4.5V.
2	VSS	power_in	Ground / negative supply reference. Typically tied to 0V. Sets the lower limit of the analog signal range.
3	NC	bidirectional	Normally-Closed analog switch terminal. Connected to COM when the IN select input is low. Analog signal range from VSS to VDD; typical on-resistance 4.0Ω with ICOM = -10mA at VS = 4.5V.
4	COM	bidirectional	Common analog switch terminal (pole of the SPDT). Connects to NC when IN is low, and to NO when IN is high. Break-before-make ensures both switches are not enabled simultaneously.
5	VDD	power_in	Positive supply rail. Operating range 1.7V to 5.5V (spec 1.8V min / 5.5V max). Typical quiescent supply current 1μA max. Bypass with 0.1μF to VSS.
6	IN	input	Digital select input. IN low selects the NC-to-COM path; IN high selects the NO-to-COM path. TTL/CMOS-compatible thresholds (VINH ≥ 1.5V at VS=5V, VINL ≤ 0.55V at VS=5V). Tolerant to 5.5V independent of VDD.

Key specifications

Parameter	Value
Manufacturer	Tudi
Package	SC-70-6
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

NC7SB3157P6X-TUD
NC7SB3157P6X-TUDI

CAD (KiCad official)

Symbol: NC7SB3157P6X
Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
3D model: SC-70-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`nc7sb3157p6x.step`	99 KB	You want the bare part, or you mark your own boards.
`nc7sb3157p6x-etched.step`	2.3 MB	You want the part with `NC7SB3157P6X` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 565 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: Tudi datasheet (9 pp, sha256 f5d8ed309137300a, 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