LMV331SQ3T2G from onsemi, in a SOT-353. 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 comparator input. Input common-mode range extends from V- (GND) to (V+ - 1 V), i.e. 0 to ~2 V at Vcc = 2.7 V.
2	GND	power_in	Negative supply / ground reference (V-). Tie to 0 V for single-supply operation.
3	-IN	input	Inverting comparator input. Input common-mode range extends from V- (GND) to (V+ - 1 V). Maximum differential voltage is +/- supply voltage.
4	OUTPUT	output	Open-drain comparator output. Requires an external pull-up resistor to Vcc. Sink current typ 23 mA (min 5 mA) at Vo <= 1.5 V; saturation voltage 120 mV typ at Isink = 1 mA. Supports wired-OR of multiple comparator outputs.
5	VCC	power_in	Positive supply (V+). Operating range 2.7 V to 5.0 V; absolute max 5.5 V between V+ and V-. Typical Icc = 40 uA at 2.7 V.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOT-353
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

LMV331SQ3T2G
LMV331SQ3T2GM5
LMV331SQ3T2GM5T
LMV331SQ3T2GD
LMV331SQ3T2GMU
LMV331SQ3T2GDTB

CAD (KiCad official)

Symbol: LMV331SQ3T2G
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SOT-353 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lmv331sq3t2g.step`	87 KB	You want the bare part, or you mark your own boards.
`lmv331sq3t2g-etched.step`	2.4 MB	You want the part with `LMV331SQ3T2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 577 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: onsemi datasheet (20 pp, sha256 b2567044b71e4f0a, 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