GS8091-TR from Gainsil, in a SOT-23-5. 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	OUT	output	Amplifier output. Rail-to-rail; swings to within ~0.12V of the supplies at RL=150Ω. Typical output current 120mA.
2	VSS	power_in	Negative supply / ground reference. In single-supply operation tie to GND; total supply (VDD-VSS) must be between 2.5V and 5.5V (7.5V absolute max).
3	IN+	input	Non-inverting analog input. Input common-mode range typically -0.2V to +3.8V (on a 5V supply). Input bias current 1pA typ.
4	IN-	input	Inverting analog input. Feedback network (RF/RG) connects between OUT, this pin, and reference. Input bias current 1pA typ.
5	VDD	power_in	Positive supply. 2.5V to 5.5V operating range (7.5V absolute maximum). Bypass with a local decoupling capacitor to VSS.

Key specifications

Parameter	Value
Manufacturer	Gainsil
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

GS8091-TR
GS8091-CR
GS8091N-TR
GS8091N-CR
GS8092-SR
GS8092-MR
GS8092N-MR
GS8094-SR
GS8094-TR

CAD (KiCad official)

Symbol: GS8091-TR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Gainsil datasheet (21 pp, sha256 8910dc973e35468e, 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