RS0102YH8 from Jiangsu RUNIC Tech, in a SOT-23-8. 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	VCCB	power_in	B-port supply voltage. 2.3V <= VCCB <= 5.5V. Must satisfy VCCA <= VCCB. Sets the B-side logic reference rail.
2	B1	bidirectional	Input/output B1 channel, referenced to VCCB. Bidirectional level-translated data pin paired with A1. Supports push-pull and open-drain signaling.
3	B2	bidirectional	Input/output B2 channel, referenced to VCCB. Bidirectional level-translated data pin paired with A2. Supports push-pull and open-drain signaling.
4	OE	input	Output Enable (active high), referenced to VCCA. Drive high to enable translation; pull low to place all I/Os in the high-impedance 3-state mode. Has an internal pull-down; tie to GND via external resistor during power-up to guarantee Hi-Z.
5	GND	power_in	Ground return for both supply rails and logic reference.
6	A2	bidirectional	Input/output A2 channel, referenced to VCCA. Bidirectional level-translated data pin paired with B2. Supports push-pull and open-drain signaling.
7	A1	bidirectional	Input/output A1 channel, referenced to VCCA. Bidirectional level-translated data pin paired with B1. Supports push-pull and open-drain signaling.
8	VCCA	power_in	A-port supply voltage. 1.65V <= VCCA <= 5.5V and VCCA <= VCCB. Sets the A-side logic reference rail; tracking VCCA also gates the internal OE pull-down.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	SOT-23-8
Category	Logic
Pins	8

Ordering variants

Same part, different packaging or reel option.

RS0102YH8
RS0102YH8YUTDS8
RS0102YH8YVS8

CAD (KiCad official)

Symbol: RS0102YH8
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: SOT-23-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rs0102yh8.step`	123 KB	You want the bare part, or you mark your own boards.
`rs0102yh8-etched.step`	2.2 MB	You want the part with `RS0102YH8` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 537 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: Jiangsu RUNIC Tech datasheet (19 pp, sha256 479703dd6df3e280, 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