OPA2340UA from UMW, in a SOP-8. 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	OUTA	output	Output of amplifier channel A. Rail-to-rail output stage, swings to within 1 mV of V+ and V- with a 100 kΩ load.
2	-INA	input	Inverting (negative) input of amplifier channel A. Rail-to-rail input, common-mode range extends 500 mV beyond V- and V+.
3	+INA	input	Noninverting (positive) input of amplifier channel A. Rail-to-rail input, common-mode range extends 500 mV beyond V- and V+.
4	V-	power_in	Negative (lowest) power supply. Typically GND in single-supply operation; supports supplies as low as 2.5 V total (V+ - V-).
5	+INB	input	Noninverting (positive) input of amplifier channel B. Rail-to-rail input, common-mode range extends 500 mV beyond V- and V+.
6	-INB	input	Inverting (negative) input of amplifier channel B. Rail-to-rail input, common-mode range extends 500 mV beyond V- and V+.
7	OUTB	output	Output of amplifier channel B. Rail-to-rail output stage, swings to within 1 mV of V+ and V- with a 100 kΩ load.
8	V+	power_in	Positive (highest) power supply. Single-supply operation from 2.5 V to 5.5 V (V+ referenced to V-). Bypass with 0.1 µF close to the pin.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOP-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

OPA2340UA

CAD (KiCad official)

Symbol: OPA2340UA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`opa2340ua.step`	122 KB	You want the bare part, or you mark your own boards.
`opa2340ua-etched.step`	2.0 MB	You want the part with `OPA2340UA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 495 faces against 147 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: UMW datasheet (18 pp, sha256 e75e687924f6aa75, 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