GS358-MR from Gainsil, 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 stage, can swing to within ~5mV of the supply rails at RL >= 100kOhm. Typical source/sink current ~84mA/75mA into 10Ohm to VS/2.
2	INA-	input	Inverting input of amplifier A. Rail-to-rail CMOS input; common-mode range extends from VSS-0.1V to VDD+0.1V. Input bias current ~1pA typical.
3	INA+	input	Non-inverting input of amplifier A. Rail-to-rail CMOS input; common-mode range VSS-0.1V to VDD+0.1V. Input bias current ~1pA typical; input offset voltage 3.5mV max at 25C.
4	VSS	power_in	Negative supply rail (or ground in single-supply operation). Absolute maximum VDD-VSS = 7.5V; operating supply 2.1V to 5.5V single-supply, or +/-1.05V to +/-2.75V dual-supply. Bypass with 0.1uF ceramic to VDD close to the pin.
5	INB+	input	Non-inverting input of amplifier B. Rail-to-rail CMOS input; common-mode range VSS-0.1V to VDD+0.1V. Input bias current ~1pA typical.
6	INB-	input	Inverting input of amplifier B. Rail-to-rail CMOS input; common-mode range VSS-0.1V to VDD+0.1V. Input bias current ~1pA typical.
7	OUTB	output	Output of amplifier B. Rail-to-rail output stage, swings to within ~5mV of the supply rails at light loads. Typical source/sink current ~84mA/75mA into 10Ohm to VS/2.
8	VDD	power_in	Positive supply rail. Operating range 2.1V to 5.5V single-supply; absolute maximum VDD-VSS = 7.5V. Bypass with 0.1uF ceramic close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

GS358-MR
GS358-SR
GS358-DR
GS358-FR

CAD (KiCad official)

Symbol: GS358-MR
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
`gs358-mr.step`	123 KB	You want the bare part, or you mark your own boards.
`gs358-mr-etched.step`	2.1 MB	You want the part with `GS358-MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 504 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: Gainsil datasheet (16 pp, sha256 3270b91a8ee80e05, 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