GS8552-SR from Gainsil, 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	Amplifier A output. Rail-to-rail output stage; can swing within a few mV of VSS/VDD under light load (>100 kΩ) and within ~60 mV at 10 kΩ. Short-circuit current ~60 mA.
2	INA-	input	Amplifier A inverting input. Rail-to-rail common-mode range from VSS-0.1 V to VDD+0.1 V. Input bias current 20 pA (typ).
3	INA+	input	Amplifier A non-inverting input. Rail-to-rail common-mode range from VSS-0.1 V to VDD+0.1 V. Input bias current 20 pA (typ).
4	VSS	power_in	Negative supply / ground. In single-supply mode connect to GND; in dual-supply mode connect to the negative rail. Total supply (VDD-VSS) range 1.8 V to 5.5 V (7.5 V abs max).
5	INB+	input	Amplifier B non-inverting input. Rail-to-rail common-mode range from VSS-0.1 V to VDD+0.1 V. Input bias current 20 pA (typ).
6	INB-	input	Amplifier B inverting input. Rail-to-rail common-mode range from VSS-0.1 V to VDD+0.1 V. Input bias current 20 pA (typ).
7	OUTB	output	Amplifier B output. Rail-to-rail output stage; can swing within a few mV of VSS/VDD under light load (>100 kΩ) and within ~60 mV at 10 kΩ. Short-circuit current ~60 mA.
8	VDD	power_in	Positive supply. Single-supply 1.8 V to 5.5 V (7.5 V abs max). Bypass with a 0.1 µF ceramic to VSS/GND close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

GS8552-SR
GS8552-MR

CAD (KiCad official)

Symbol: GS8552-SR
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
`gs8552-sr.step`	122 KB	You want the bare part, or you mark your own boards.
`gs8552-sr-etched.step`	2.4 MB	You want the part with `GS8552-SR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 565 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 dc9b0f2b6cedff03, 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