GS6552-SR from Gainsil, 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	OUTA	output	Amplifier A output. Rail-to-rail output stage; typical short-circuit limit 60mA, output current 65mA.
2	INA-	input	Amplifier A inverting input. Rail-to-rail input range extending from VSS-0.1V to VDD+0.1V; typical input bias current 20pA.
3	INA+	input	Amplifier A non-inverting input. Rail-to-rail input range extending from VSS-0.1V to VDD+0.1V; typical input bias current 20pA.
4	VSS	power_in	Negative supply / ground. Single-supply operation ties this to GND; dual-supply operation uses ±0.9V to ±2.75V. Bypass with 0.1µF to ground.
5	INB+	input	Amplifier B non-inverting input. Rail-to-rail input range extending from VSS-0.1V to VDD+0.1V; typical input bias current 20pA.
6	INB-	input	Amplifier B inverting input. Rail-to-rail input range extending from VSS-0.1V to VDD+0.1V; typical input bias current 20pA.
7	OUTB	output	Amplifier B output. Rail-to-rail output stage; typical short-circuit limit 60mA, output current 65mA.
8	VDD	power_in	Positive supply. Single-supply range 1.8V to 5.5V (absolute max 7.5V VDD-to-VSS). Bypass with 0.1µF ceramic close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

GS6552-SR
GS6552-MR

CAD (KiCad official)

Symbol: GS6552-SR
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
`gs6552-sr.step`	122 KB	You want the bare part, or you mark your own boards.
`gs6552-sr-etched.step`	2.3 MB	You want the part with `GS6552-SR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 550 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 (14 pp, sha256 55a4bcd77e36ce38, 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