LMV321B-TR from 3PEAK, 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 analog input. Rail-to-rail input; common-mode range extends from (V-) - 0.1 V to (V+) + 0.1 V. Input bias current ~1 pA at 25 °C. ESD-protected with clamp diodes to each rail; keep input current below ±10 mA if the pin is driven beyond the supplies.
2	-Vs	power_in	Negative supply rail (typically GND in single-supply operation). Total supply voltage (V+) - (V-) must not exceed 6 V absolute maximum; recommended 2.5 V to 5.5 V total.
3	-In	input	Inverting analog input. Rail-to-rail input; common-mode range extends 100 mV beyond each supply rail. Input bias current ~1 pA at 25 °C; input capacitance 8 pF differential / 7 pF common-mode.
4	Out	output	Rail-to-rail analog output. Swings to within 15 mV of each supply rail with a 10 kΩ load. Short-circuit current typically 100 mA (indefinite short-circuit duration allowed, subject to junction-temperature limits).
5	+Vs	power_in	Positive supply rail. Operating range 2.5 V to 5.5 V referenced to -Vs; absolute maximum (+Vs) - (-Vs) = 6 V. Quiescent current 80 µA typical (130 µA max) per amplifier. Bypass with a local decoupling capacitor to -Vs.

Key specifications

Parameter	Value
Manufacturer	3PEAK
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

LMV321B-TR
LMV321B-TRCR

CAD (KiCad official)

Symbol: LMV321B-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
`lmv321b-tr.step`	85 KB	You want the bare part, or you mark your own boards.
`lmv321b-tr-etched.step`	1.6 MB	You want the part with `LMV321B-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 405 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: 3PEAK datasheet (16 pp, sha256 77ea0faba82619fb, 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