GS8743-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	Comparator push-pull output. CMOS/TTL-compatible, rail-to-rail. Typical output swing within 166mV of VDD (VOH) and 132mV of VSS (VOL) at 4mA load; short-circuit source/sink current ~42/43mA at VS=5V.
2	VSS	power_in	Negative supply / ground pin. Connect to 0V in single-supply operation (2.7V to 5.5V across VDD-VSS), or to the negative rail in dual-supply operation (±1.35V to ±2.75V).
3	IN+	input	Non-inverting analog input. Rail-to-rail common-mode range extends 100mV beyond supply rails (VSS-0.1V to VDD+0.1V). Max input voltage limited to VSS-0.5V to VDD+0.5V (absolute).
4	IN-	input	Inverting analog input. Rail-to-rail common-mode range extends 100mV beyond supply rails (VSS-0.1V to VDD+0.1V). Input bias current typ 6pA; input offset current typ 4pA.
5	VDD	power_in	Positive supply pin. Operating range 2.7V to 5.5V single-supply (absolute max 7.5V vs VSS). Quiescent current 1.3mA typ. Bypass with 0.1µF 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.

GS8743-TR
GS8743-TRCR

CAD (KiCad official)

Symbol: GS8743-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
`gs8743-tr.step`	85 KB	You want the bare part, or you mark your own boards.
`gs8743-tr-etched.step`	1.8 MB	You want the part with `GS8743-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 443 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 (10 pp, sha256 01cf762eed96a4a8, 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