π122U30 from 2Pai Semi, in a SOP-8. 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	VDD1	power_in	Supply Voltage for Isolator Side 1. Operating range 3.0 V to 5.5 V. Bypass to GND1 with 0.1 µF.
2	VOA	output	Logic Output A on Side 1 (channel A receives from Side 2 input VIA on pin 7). CMOS output rail-to-rail with
3	VIB	input	Logic Input B on Side 1 (channel B drives Side 2 output VOB on pin 6). VIH ≥ 0.7·VDD1, VIL ≤ 0.3·VDD1. Input current typ 0.5 µA.
4	GND1	power_in	Ground reference for Isolator Side 1.
5	GND2	power_in	Ground reference for Isolator Side 2.
6	VOB	output	Logic Output B on Side 2 (channel B, driven by VIB on pin 3). CMOS output rail-to-rail with
7	VIA	input	Logic Input A on Side 2 (channel A drives Side 1 output VOA on pin 2). VIH ≥ 0.7·VDD2, VIL ≤ 0.3·VDD2.
8	VDD2	power_in	Supply Voltage for Isolator Side 2. Operating range 3.0 V to 5.5 V (independent of VDD1, enabling level translation). Bypass to GND2 with 0.1 µF.

Key specifications

Parameter	Value
Manufacturer	2Pai Semi
Package	SOP-8
Category	Comm/UART
Pins	8

Ordering variants

π122U30
π122U30π122U31
π122U30π122U60
π122U30π122U61

CAD (KiCad official)

Symbol: π122U30
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`122u30.step`	122 KB	You want the bare part, or you mark your own boards.
`122u30-etched.step`	1.7 MB	You want the part with `122U30` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 409 faces against 147 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: 2Pai Semi datasheet (17 pp, sha256 816a1928941ca18b, 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