SN74LVC1G3157DC from lingxingic, in a SOT-363. 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	Y1	bidirectional	Independent analog I/O 1. Connected to the common Z pin through the analog switch when S = H. Signal range 0 V to VCC; RON ≈ 6.5 Ω @ VCC=3.3 V.
2	GND	power_in	Ground reference (0 V). Common return for supply and analog signals.
3	Y0	bidirectional	Independent analog I/O 0. Connected to the common Z pin through the analog switch when S = L. Signal range 0 V to VCC; RON ≈ 6.5 Ω @ VCC=3.3 V.
4	Z	bidirectional	Common analog I/O. Routed to either Y0 (S=L) or Y1 (S=H) through the analog switch; supports bidirectional analog or digital signals from 0 V to VCC and up to 32 mA switch current.
5	VCC	power_in	Positive supply. Recommended operating range 1.65 V to 5.5 V (absolute max 6.5 V). Decouple to GND with a 0.1 µF ceramic capacitor placed close to the pin.
6	S	input	Digital select input with Schmitt-trigger action. S=L connects Z↔Y0; S=H connects Z↔Y1. TTL-compatible at 3.3 V; input tolerates up to 5.5 V regardless of VCC.

Key specifications

Parameter	Value
Manufacturer	lingxingic
Package	SOT-363
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

SN74LVC1G3157DC
SN74LVC1G3157DCDB
SN74LVC1G3157DCDR

CAD (KiCad official)

Symbol: SN74LVC1G3157DC
Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
3D model: SOT-363 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74lvc1g3157dc.step`	99 KB	You want the bare part, or you mark your own boards.
`sn74lvc1g3157dc-etched.step`	2.4 MB	You want the part with `SN74LVC1G3157DC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 600 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: lingxingic datasheet (23 pp, sha256 e159eb3e0aeb7721, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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