LMV321IDCKR from UMW, in a SC-70-5. 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 input of the op-amp. Rail-to-rail input common-mode range from (-VS)-0.1V to (+VS)+0.1V at VS=5.5V; typical input bias current 10 nA.
2	VSS	power_in	Negative supply / ground pin. Connect to system ground for single-supply operation or to the negative rail for dual-supply operation. Absolute maximum supply voltage (VDD-VSS) is 7.5 V; recommended operating range 2.1 V to 5.5 V.
3	IN-	input	Inverting analog input of the op-amp. Rail-to-rail input common-mode range; typical input offset current 10 nA and input bias current 10 nA.
4	OUT	output	Rail-to-rail op-amp output. Typical output current 25 mA, short-circuit protected; slew rate 0.52 V/µs.
5	VDD	power_in	Positive supply pin. Recommended operating range 2.1 V to 5.5 V (7.5 V absolute maximum). Bypass to VSS with a local 0.1 µF ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SC-70-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

LMV321IDCKR
LMV321IDCKRIDBVR
LMV321IDCKRDBV
LMV358
LMV324

CAD (KiCad official)

Symbol: LMV321IDCKR
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SC-70-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lmv321idckr.step`	87 KB	You want the bare part, or you mark your own boards.
`lmv321idckr-etched.step`	1.8 MB	You want the part with `LMV321IDCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 459 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: UMW datasheet (15 pp, sha256 92ba53cd7280c726, 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