COS358SR from COSINE, in a SOIC-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; swings to within ~10mV of each supply rail (1mV @ 100kΩ, 10mV @ 10kΩ, 40mV @ 2kΩ). Short-circuit current typ. 45mA source / 50mA sink.
2	-IN1	input	Inverting (negative) input of amplifier A. Input voltage range from -Vs -0.3V to +Vs - 1V. Input terminals are diode-clamped to the supply rails; signals exceeding rails by >0.5V must be current-limited to 10mA.
3	+IN1	input	Non-inverting (positive) input of amplifier A. Same voltage range as the inverting input (-Vs -0.3V to +Vs - 1V). Common-mode range with Vs=5.5V spans -0.1V to 4.5V; CMRR typ. 125dB.
4	-Vs	power_in	Negative supply / ground pin. For single-supply operation tie to GND; for dual-supply operation connect to negative rail (±1.05V to ±2.75V). Bypass with 0.1µF ceramic close to the pin if not tied directly to ground.
5	+IN2	input	Non-inverting (positive) input of amplifier B. Same voltage-range and common-mode specifications as +IN1.
6	-IN2	input	Inverting (negative) input of amplifier B. Input voltage range from -Vs -0.3V to +Vs - 1V; diode-clamped to supplies.
7	OUTB	output	Output of amplifier B. Rail-to-rail; same drive characteristics as OUTA.
8	+Vs	power_in	Positive supply pin. Operating range 2.1V to 5.5V (single supply) or ±1.05V to ±2.75V (dual). Bypass with a 0.1µF ceramic capacitor placed as close as possible to this pin (2.2µF tantalum optional for improved performance). Total quiescent current ~170µA (85µA per amplifier).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

COS358SR
COS358SRMR

CAD (KiCad official)

Symbol: COS358SR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cos358sr.step`	122 KB	You want the bare part, or you mark your own boards.
`cos358sr-etched.step`	2.4 MB	You want the part with `COS358SR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 551 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