GS8552-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, capable of swinging within ~5mV of the supply rails with light loads (>100kΩ) and 60mV with 10kΩ. Short-circuit current typically 60mA.
2	INA-	input	Inverting input of amplifier A. Rail-to-rail input, allowed common-mode range VSS-0.1V to VDD+0.1V. Input bias current typ 20pA.
3	INA+	input	Non-inverting input of amplifier A. Rail-to-rail input, allowed common-mode range VSS-0.1V to VDD+0.1V. Input bias current typ 20pA.
4	VSS	power_in	Negative supply / ground. Single-supply operation ties this to GND; dual-supply operation accepts ±0.9V to ±2.75V. Absolute max VDD-VSS = 7.5V. Bypass to ground with a 0.1µF ceramic capacitor.
5	INB+	input	Non-inverting input of amplifier B. Rail-to-rail input, allowed common-mode range VSS-0.1V to VDD+0.1V. Input bias current typ 20pA.
6	INB-	input	Inverting input of amplifier B. Rail-to-rail input, allowed common-mode range VSS-0.1V to VDD+0.1V. Input bias current typ 20pA.
7	OUTB	output	Output of amplifier B. Rail-to-rail output, capable of swinging within ~5mV of the supply rails with light loads (>100kΩ) and 60mV with 10kΩ. Short-circuit current typically 60mA.
8	VDD	power_in	Positive supply. Single-supply operation from +1.8V to +5.5V (absolute max VDD-VSS = 7.5V). Quiescent current typ 180µA per amplifier (360µA total). Bypass to VSS with a 0.1µF ceramic capacitor placed 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.

GS8552-MR
GS8552-MRSR
GS8552-SR

CAD (KiCad official)

Symbol: GS8552-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
`gs8552-mr.step`	123 KB	You want the bare part, or you mark your own boards.
`gs8552-mr-etched.step`	2.2 MB	You want the part with `GS8552-MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 535 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