GS8332-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	Amplifier A output. Rail-to-rail push-pull output; swings within ~5 mV of the supply rails into 100 kohm and within ~20 mV into 10 kohm. Short-circuit limited to ~20 mA typ (15 mA min) source/sink.
2	INA-	input	Amplifier A inverting input. High-impedance CMOS input with rail-to-rail common-mode range (Vss-0.1 V to Vdd+0.1 V). Typical input bias current 20 pA.
3	INA+	input	Amplifier A non-inverting input. High-impedance CMOS input with rail-to-rail common-mode range (Vss-0.1 V to Vdd+0.1 V). Typical input bias current 20 pA.
4	VSS	power_in	Negative supply / ground. Single-supply operation ties this to GND; dual-supply operation ties this to the negative rail. Bypass with 0.1 uF close to the pin in dual-supply designs. Absolute maximum Vdd-Vss = 7.5 V.
5	INB+	input	Amplifier B non-inverting input. High-impedance CMOS input with rail-to-rail common-mode range (Vss-0.1 V to Vdd+0.1 V). Typical input bias current 20 pA.
6	INB-	input	Amplifier B inverting input. High-impedance CMOS input with rail-to-rail common-mode range (Vss-0.1 V to Vdd+0.1 V). Typical input bias current 20 pA.
7	OUTB	output	Amplifier B output. Rail-to-rail push-pull output; swings within ~5 mV of the supply rails into 100 kohm and within ~20 mV into 10 kohm. Short-circuit limited to ~20 mA typ (15 mA min) source/sink.
8	VDD	power_in	Positive supply. Single-supply range +1.8 V to +5.5 V (dual-supply +/-0.9 V to +/-2.75 V). Bypass with a 0.1 uF ceramic close to the pin. Absolute maximum Vdd-Vss = 7.5 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

GS8332-MR
GS8332-SR
GS8331-TR
GS8331-CR
GS8334-SR
GS8334-TR

CAD (KiCad official)

Symbol: GS8332-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
`gs8332-mr.step`	123 KB	You want the bare part, or you mark your own boards.
`gs8332-mr-etched.step`	2.4 MB	You want the part with `GS8332-MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 563 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 (15 pp, sha256 118070d5dc462cce, 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