LM321DTR from XBLW LM321DTR XBLW, in a SOT-23-5. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	+IN	input	Non-inverting input of the op amp. Input common-mode range includes ground (0V to V+ - 1.5V at 25°C). Input bias current typ 45nA. Either input can go to +32V without damage.
2	-Vs	power_in	Negative supply / ground pin. For single-supply operation, connect to GND. Supply range +3V to +32V total (V+ - V-).
3	-IN	input	Inverting input of the op amp. Input common-mode range includes ground (0V to V+ - 1.5V at 25°C). Input bias current typ 45nA.
4	OUT	output	Op amp output. Source current typ 40mA, sink current typ 15mA. Short-circuit-to-ground current ~40mA. Output swing: VOH typ 23V (RL=2kΩ, V+=30V); VOL typ 5mV (RL=10kΩ, V+=5V).
5	+Vs	power_in	Positive supply pin. Operating supply voltage +3V to +32V. Supply current typ 100µA at V+=5V (300µA max), 160µA typ at V+=30V (500µA max).

Key specifications

Parameter	Value
Manufacturer	XBLW LM321DTR XBLW
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

LM321DTR

CAD (KiCad official)

Symbol: LM321DTR
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
`lm321dtr.step`	85 KB	You want the bare part, or you mark your own boards.
`lm321dtr-etched.step`	1.4 MB	You want the part with `LM321DTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 355 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: XBLW LM321DTR XBLW datasheet (9 pp, sha256 a13a57061fecd0dc, 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