RS2105XTDC10 from Jiangsu RUNIC Tech, in a TDFN-10-EP(3x3). 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	V+	power_in	Positive power supply input. Operating range 1.8 V to 5.5 V (absolute max 7.0 V referenced to GND). Quiescent supply current typ <1 µA.
2	NO1	passive	Normally-Open analog terminal of switch 1. Connected to COM1 when IN1 = logic high. Signal range 0 V to V+, continuous current ±500 mA, peak ±800 mA.
3	COM1	passive	Common terminal of switch 1. Routes to NO1 when IN1 = 1, or to NC1 when IN1 = 0. On-resistance 0.6 Ω typ at V+ = 5 V.
4	IN1	input	Digital control input for switch 1 (TTL/CMOS compatible). VIH ≥ 1.5 V (V+ = 5 V) or ≥ 1.3 V (V+ = 3.3 V); VIL ≤ 0.6 V / 0.5 V respectively. Unused inputs must be tied to V+ or GND.
5	NC1	passive	Normally-Closed analog terminal of switch 1. Connected to COM1 when IN1 = logic low. Signal range 0 V to V+.
6	GND	power_in	Ground reference for supply and digital control logic.
7	NC2	passive	Normally-Closed analog terminal of switch 2. Connected to COM2 when IN2 = logic low. Signal range 0 V to V+.
8	IN2	input	Digital control input for switch 2 (TTL/CMOS compatible). Same thresholds as IN1. Unused inputs must be tied to V+ or GND.
9	COM2	passive	Common terminal of switch 2. Routes to NO2 when IN2 = 1, or to NC2 when IN2 = 0. On-resistance 0.6 Ω typ at V+ = 5 V.
10	NO2	passive	Normally-Open analog terminal of switch 2. Connected to COM2 when IN2 = logic high. Signal range 0 V to V+.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	TDFN-10-EP(3x3)
Category	Interface
Pins	10

Ordering variants

Same part, different packaging or reel option.

RS2105XTDC10
RS2105XTDC10XN

CAD (KiCad official)

Symbol: RS2105XTDC10
Footprint: Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm
3D model: TDFN-10-EP(3x3) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Jiangsu RUNIC Tech datasheet (11 pp, sha256 1092b42796c3258d, 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