TPW4053-SR from 3PEAK, in a SOIC-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	B1	bidirectional	Channel B1 analog switch throw. Connects to common B (pin 15) when the B-channel select routes to the '1' side. Signal range VEE to VCC; ±25 mA max switch current.
2	B0	bidirectional	Channel B0 analog switch throw. Connects to common B (pin 15) when the B-channel select routes to the '0' side. Signal range VEE to VCC; ±25 mA max switch current.
3	C1	bidirectional	Channel C1 analog switch throw. Connects to common C (pin 4) when the C-channel select routes to the '1' side. Signal range VEE to VCC; ±25 mA max switch current.
4	C	bidirectional	C common analog input/output. Routed to either C0 (pin 5) or C1 (pin 3) depending on the S2 select input and enable. Bidirectional analog signal path.
5	C0	bidirectional	Channel C0 analog switch throw. Connects to common C (pin 4) when the C-channel select routes to the '0' side. Signal range VEE to VCC; ±25 mA max switch current.
6	/E	input	Active-low enable input. When /E is LOW the selected switches are enabled per the S0/S1/S2 truth table; when /E is HIGH all three switches are turned off. Digital input, VIH = 2.0 V min (2.4 V at 9-11 V VCC), VIL = 0.8 V max. Must be held HIGH or LOW; do not float.
7	VEE	power_in	Negative analog supply. Ground for single-supply operation (VEE = 0 V) or negative rail for dual-supply operation (VEE down to −5.5 V). Sets the lower analog signal limit; abs-max −6.5 V to 0.5 V vs GND.
8	GND	power_in	Digital ground reference. VCC − GND recommended 3 V to 12 V; VEE − GND recommended −6 V to 0 V.
9	S2	input	Select input for the C channel (selects C0 vs C1). Digital CMOS input, VIH = 2.0 V min (2.4 V at 9-11 V VCC), VIL = 0.8 V max; input leakage ±1 µA max. Must be driven HIGH or LOW, not floated.
10	S1	input	Select input for the B channel (selects B0 vs B1). Digital CMOS input, VIH = 2.0 V min (2.4 V at 9-11 V VCC), VIL = 0.8 V max; input leakage ±1 µA max. Must be driven HIGH or LOW, not floated.
11	S0	input	Select input for the A channel (selects A0 vs A1). Digital CMOS input, VIH = 2.0 V min (2.4 V at 9-11 V VCC), VIL = 0.8 V max; input leakage ±1 µA max. Must be driven HIGH or LOW, not floated.
12	A0	bidirectional	Channel A0 analog switch throw. Connects to common A (pin 14) when the A-channel select routes to the '0' side. Signal range VEE to VCC; ±25 mA max switch current.
13	A1	bidirectional	Channel A1 analog switch throw. Connects to common A (pin 14) when the A-channel select routes to the '1' side. Signal range VEE to VCC; ±25 mA max switch current.
14	A	bidirectional	A common analog input/output. Routed to either A0 (pin 12) or A1 (pin 13) depending on the S0 select input and enable. Bidirectional analog signal path.
15	B	bidirectional	B common analog input/output. Routed to either B0 (pin 2) or B1 (pin 1) depending on the S1 select input and enable. Bidirectional analog signal path.
16	VCC	power_in	Positive supply. Single-supply 3 V to 12 V above GND, or dual-supply 4.5-5.5 V above GND with VEE at −4.5 to −5.5 V. Sets the upper analog signal limit; abs-max −0.5 V to 13 V vs GND. ICC quiescent 4-16 µA typ over the supply range.

Key specifications

Parameter	Value
Manufacturer	3PEAK
Package	SOIC-16
Category	Comm/UART
Pins	16

Ordering variants

Same part, different packaging or reel option.

TPW4053-SR
TPW4053-SRTR
TPW4053-SR-TR

CAD (KiCad official)

Symbol: TPW4053-SR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tpw4053-sr.step`	217 KB	You want the bare part, or you mark your own boards.
`tpw4053-sr-etched.step`	2.5 MB	You want the part with `TPW4053-SR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 634 faces against 267 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: 3PEAK datasheet (15 pp, sha256 cdb913c6bba9a54e, 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