RS2099XTQC16 from Jiangsu RUNIC Tech, in a QFN-16-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	NC1	passive	Normally-closed terminal of SPDT switch 1. Connected to COM1 when IN1-2 = 0. Rail-to-rail analog signal path, 0V to V+, 0.6Ω typical Ron.
2	IN1-2	input	Digital control input for SPDT switches 1 and 2. TTL/CMOS compatible: VIH ≥ 1.5V (5V supply) / 1.3V (3.3V), VIL ≤ 0.6V/0.5V. When 0, NCx connects to COMx; when 1, NOx connects to COMx.
3	NO2	passive	Normally-open terminal of SPDT switch 2. Connected to COM2 when IN1-2 = 1. Rail-to-rail analog signal path, 0V to V+, 0.6Ω typical Ron.
4	COM2	passive	Common terminal of SPDT switch 2. Routed to NC2 or NO2 under control of IN1-2. Bidirectional analog/digital signal, 0V to V+.
5	NC2	passive	Normally-closed terminal of SPDT switch 2. Connected to COM2 when IN1-2 = 0.
6	GND	power_in	Ground reference for the device. All analog signals are referenced from GND up to V+.
7	NO3	passive	Normally-open terminal of SPDT switch 3. Connected to COM3 when IN3-4 = 1.
8	COM3	passive	Common terminal of SPDT switch 3. Routed to NC3 or NO3 under control of IN3-4. Bidirectional analog/digital signal, 0V to V+.
9	NC3	passive	Normally-closed terminal of SPDT switch 3. Connected to COM3 when IN3-4 = 0.
10	IN3-4	input	Digital control input for SPDT switches 3 and 4. TTL/CMOS compatible: VIH ≥ 1.5V (5V) / 1.3V (3.3V), VIL ≤ 0.6V/0.5V. When 0, NCx connects to COMx; when 1, NOx connects to COMx.
11	NO4	passive	Normally-open terminal of SPDT switch 4. Connected to COM4 when IN3-4 = 1.
12	COM4	passive	Common terminal of SPDT switch 4. Routed to NC4 or NO4 under control of IN3-4. Bidirectional analog/digital signal, 0V to V+.
13	NC4	passive	Normally-closed terminal of SPDT switch 4. Connected to COM4 when IN3-4 = 0.
14	V+	power_in	Positive supply, 1.8V to 5.5V. Sets rail-to-rail analog signal range (0 to V+). Quiescent current ≤ 1µA.
15	NO1	passive	Normally-open terminal of SPDT switch 1. Connected to COM1 when IN1-2 = 1.
16	COM1	passive	Common terminal of SPDT switch 1. Routed to NC1 or NO1 under control of IN1-2. Bidirectional analog/digital signal, 0V to V+.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	QFN-16-EP(3x3)
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

RS2099XTQC16
RS2099XTQC16XTSS16

CAD (KiCad official)

Symbol: RS2099XTQC16
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)

Provenance

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

Datasheet: Jiangsu RUNIC Tech datasheet (12 pp, sha256 dcad3d9525dbca63, 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