TL331IDBVR from Texas Instruments, 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 comparator input. Common-mode input voltage range includes ground; input bias current typically 25 nA.
2	GND	power_in	Ground / negative supply reference. Connect to system ground (or V- in split-supply configurations).
3	IN-	input	Inverting comparator input. Common-mode input voltage range includes ground; input bias current typically 25 nA.
4	OUT	output	Open-collector comparator output. Requires an external pull-up resistor to VCC (or another rail up to 36 V). Sinks up to ~6 mA typical; output low when IN+ < IN-.
5	VCC	power_in	Positive supply input. Single-supply range 2 V to 36 V, or split-supply ±1 V to ±18 V. Supply current typically 300 uA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TL331IDBVR
TL331IDBVT

CAD (KiCad official)

Symbol: TL331IDBVR
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
`tl331idbvr.step`	85 KB	You want the bare part, or you mark your own boards.
`tl331idbvr-etched.step`	1.7 MB	You want the part with `TL331IDBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 440 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: Texas Instruments datasheet (18 pp, sha256 b28fe7231d4e36b1, retrieved 2026-08-17, tier: manufacturer)
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