RS0104YQ from Jiangsu RUNIC Tech, in a TSSOP-14. 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	VCCA	power_in	A-port supply voltage. 1.65 V ≤ VCCA ≤ 5.5 V, and VCCA must be ≤ VCCB. Sets the reference rail for the A-side I/Os and the OE input.
2	A1	bidirectional	Bidirectional level-translated I/O channel 1, A-side. Referenced to VCCA. Supports push-pull (24 Mbps) and open-drain (2 Mbps) signaling.
3	A2	bidirectional	Bidirectional level-translated I/O channel 2, A-side. Referenced to VCCA.
4	A3	bidirectional	Bidirectional level-translated I/O channel 3, A-side. Referenced to VCCA.
5	A4	bidirectional	Bidirectional level-translated I/O channel 4, A-side. Referenced to VCCA.
6	NC	unconnected	No internal connection. May be left floating or tied to any potential within the abs-max range.
7	GND	power_in	Device ground reference (0 V) for both supply rails and all I/Os.
8	OE	input	Output Enable (active high), referenced to VCCA. Drive OE low (≤ VCCA × 0.25) to place all A/B I/Os in the high-impedance 3-state mode; drive high (≥ VCCA × 0.8) for normal translation. An internal pull-down current source keeps OE low while VCCA is powered; tie to GND via a pull-down resistor to guarantee Hi-Z during power up/down.
9	NC	unconnected	No internal connection. May be left floating or tied to any potential within the abs-max range.
10	B4	bidirectional	Bidirectional level-translated I/O channel 4, B-side. Referenced to VCCB.
11	B3	bidirectional	Bidirectional level-translated I/O channel 3, B-side. Referenced to VCCB.
12	B2	bidirectional	Bidirectional level-translated I/O channel 2, B-side. Referenced to VCCB.
13	B1	bidirectional	Bidirectional level-translated I/O channel 1, B-side. Referenced to VCCB.
14	VCCB	power_in	B-port supply voltage. 2.3 V ≤ VCCB ≤ 5.5 V and VCCB ≥ VCCA. Sets the reference rail for the B-side I/Os.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	TSSOP-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

RS0104YQ
RS0104YQYTQF14
RS0104YQYTQE12

CAD (KiCad official)

Symbol: RS0104YQ
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rs0104yq.step`	194 KB	You want the bare part, or you mark your own boards.
`rs0104yq-etched.step`	2.2 MB	You want the part with `RS0104YQ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 552 faces against 237 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 (23 pp, sha256 b9cb7825e3455cb1, 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