COS2171SRA from COSINE, in a SOP-8. 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	OUT1	output	Output of amplifier A. Output voltage range extends to within ~500mV of each supply rail (RRIO).
2	-IN1	input	Inverting input of amplifier A. Voltage range from -Vs - 0.3V to +Vs + 0.3V; inputs are diode-clamped to the supply rails.
3	+IN1	input	Non-inverting input of amplifier A. Voltage range from -Vs - 0.3V to +Vs + 0.3V; rail-to-rail input capability.
4	-Vs	power_in	Negative power supply or ground. For dual-supply operation ±2.25V to ±20V; bypass with 0.1µF ceramic as close to the pin as possible.
5	+IN2	input	Non-inverting input of amplifier B. Voltage range from -Vs - 0.3V to +Vs + 0.3V; rail-to-rail input capability.
6	-IN2	input	Inverting input of amplifier B. Voltage range from -Vs - 0.3V to +Vs + 0.3V; inputs are diode-clamped to the supply rails.
7	OUT2	output	Output of amplifier B. Output voltage range extends to within ~500mV of each supply rail (RRIO).
8	+Vs	power_in	Positive power supply, 4.5V to 40V (single-supply) or +2.25V to +20V (dual-supply). Bypass with 0.1µF ceramic capacitor as close to the pin as possible; a 2.2µF tantalum can be added for better performance.

Key specifications

Parameter	Value
Manufacturer	COSINE
Package	SOP-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

COS2171SRA
COS2171SRASRB
COS2171SRASRC

CAD (KiCad official)

Symbol: COS2171SRA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cos2171sra.step`	122 KB	You want the bare part, or you mark your own boards.
`cos2171sra-etched.step`	2.1 MB	You want the part with `COS2171SRA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 512 faces against 147 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: COSINE datasheet (10 pp, sha256 60b789e21a6df5f6, 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