RS2233YTSS16 from Jiangsu RUNIC Tech, in a TSSOP-16. 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	IN	input	Select input. Digital CMOS input that selects the analog data path for all four channels: IN=Low routes A-port to B1-port; IN=High routes A-port to B2-port. VIH ≥ 1.1V (VCC=1.8V) or ≥ 2V (VCC=2.5-5.5V); VIL ≤ 0.4V (VCC=1.8V) or ≤ 0.5V (VCC=2.5-5.5V).
2	1B1	bidirectional	Channel 1 analog video I/O, B1 throw. Bidirectional analog switch terminal connected to 1A when IN=Low and OE=Low. Rail-to-rail signal range within VCC/GND.
3	1B2	bidirectional	Channel 1 analog video I/O, B2 throw. Bidirectional analog switch terminal connected to 1A when IN=High and OE=Low.
4	1A	bidirectional	Channel 1 analog video I/O, common A pole. Bidirectional analog terminal routed to 1B1 or 1B2 per the IN select. Signals pass equally in either direction.
5	2B1	bidirectional	Channel 2 analog video I/O, B1 throw. Bidirectional analog switch terminal connected to 2A when IN=Low and OE=Low.
6	2B2	bidirectional	Channel 2 analog video I/O, B2 throw. Bidirectional analog switch terminal connected to 2A when IN=High and OE=Low.
7	2A	bidirectional	Channel 2 analog video I/O, common A pole. Bidirectional analog terminal routed to 2B1 or 2B2 per the IN select.
8	GND	power_in	Ground reference for the CMOS logic and analog switches. Connect to system 0V.
9	3A	bidirectional	Channel 3 analog video I/O, common A pole. Bidirectional analog terminal routed to 3B1 or 3B2 per the IN select.
10	3B2	bidirectional	Channel 3 analog video I/O, B2 throw. Bidirectional analog switch terminal connected to 3A when IN=High and OE=Low.
11	3B1	bidirectional	Channel 3 analog video I/O, B1 throw. Bidirectional analog switch terminal connected to 3A when IN=Low and OE=Low.
12	4A	bidirectional	Channel 4 analog video I/O, common A pole. Bidirectional analog terminal routed to 4B1 or 4B2 per the IN select.
13	4B2	bidirectional	Channel 4 analog video I/O, B2 throw. Bidirectional analog switch terminal connected to 4A when IN=High and OE=Low.
14	4B1	bidirectional	Channel 4 analog video I/O, B1 throw. Bidirectional analog switch terminal connected to 4A when IN=Low and OE=Low.
15	~{OE}	input	Active-low switch-enable input. When OE is Low the selected A-to-B path is connected; when OE is High all four switches are disconnected (high-impedance). Same VIH/VIL thresholds as the IN pin.
16	VCC	power_in	Positive supply pin. Single-supply operation from +1.8V to +5.5V. Quiescent ICC ≤ 1µA typical. Bypass to GND with a local ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	TSSOP-16
Category	Comm/UART
Pins	16

Ordering variants

Same part, different packaging or reel option.

RS2233YTSS16
RS2233YTSS16YS16
RS2233YTSS16YSS16

CAD (KiCad official)

Symbol: RS2233YTSS16
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Jiangsu RUNIC Tech datasheet (13 pp, sha256 2934121214429ffa, 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