COS358MR from COSINE, in a MSOP-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	OUTA	output	Output of amplifier A. Rail-to-rail output that extends to within millivolts of each supply rail.
2	-INA	input	Inverting input of amplifier A. Voltage range from -Vs -0.3V to +Vs - 1V. Input terminals are diode-clamped to the power-supply rails.
3	+INA	input	Non-inverting input of amplifier A. Voltage range from -Vs -0.3V to +Vs - 1V.
4	-Vs	power_in	Negative power supply or ground. If not connected to ground, bypass with a 0.1µF capacitor as close to the part as possible. Supply range 2.1V to 5.5V total between +Vs and -Vs.
5	+INB	input	Non-inverting input of amplifier B. Voltage range from -Vs -0.3V to +Vs - 1V.
6	-INB	input	Inverting input of amplifier B. Voltage range from -Vs -0.3V to +Vs - 1V. Input terminals are diode-clamped to the power-supply rails.
7	OUTB	output	Output of amplifier B. Rail-to-rail output that extends to within millivolts of each supply rail.
8	+Vs	power_in	Positive power supply, 2.1V to 5.5V. Bypass with a 0.1µF ceramic capacitor placed as close to the pin as possible.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

COS358MR
COS358MRSR

CAD (KiCad official)

Symbol: COS358MR
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cos358mr.step`	123 KB	You want the bare part, or you mark your own boards.
`cos358mr-etched.step`	2.2 MB	You want the part with `COS358MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 521 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 7499c4d7cd32eb92, 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