GSV331-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	IN+	input	Non-inverting analog comparator input. Rail-to-rail input common-mode range extends 100 mV beyond the supplies (VSS-0.1V to VDD+0.1V); absolute limits VSS-0.5V to VDD+0.5V. Input bias current 6 pA typ.
2	VSS	power_in	Negative supply / ground. In single-supply operation tie to system ground; in dual-supply operation connect to the negative rail. Bypass to ground with a 0.1 uF ceramic capacitor close to the pin.
3	IN-	input	Inverting analog comparator input. Rail-to-rail input common-mode range extends 100 mV beyond the supplies (VSS-0.1V to VDD+0.1V); absolute limits VSS-0.5V to VDD+0.5V. Input bias current 6 pA typ.
4	OUT	output	Push-pull comparator output, CMOS/TTL-compatible. Rail-to-rail swing (VOH = VDD-0.05V, VOL = 57 mV typ at IO=1 mA, VS=5V). Short-circuit source/sink currents typ 35 mA / 33 mA.
5	VDD	power_in	Positive supply pin. Operating range 1.8 V to 5.5 V (single supply) or ±0.9 V to ±2.75 V (dual supply). Absolute maximum VDD-VSS = 7.5 V. Bypass with a 0.1 uF ceramic capacitor placed close to the pin.

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.

GSV331-TR
GSV331-CR
GSV332-SR
GSV332-MR

CAD (KiCad official)

Symbol: GSV331-TR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`gsv331-tr.step`	85 KB	You want the bare part, or you mark your own boards.
`gsv331-tr-etched.step`	1.8 MB	You want the part with `GSV331-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 428 faces against 102 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 (12 pp, sha256 6b976ee2a9a9b84e, 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