component

LM321MF

Public Made by Adom

by adom

UMW Operational Amplifier, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm321mf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm321mf-etched.fit.json lm321mf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm321mf-etched.glb lm321mf: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wit… · Ray
lm321mf-etched.step lm321mf: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wit… · Ray
lm321mf.glb Publish 0.1.0 · Ray
lm321mf.kicad_mod Publish 0.1.0 · Ray
lm321mf.kicad_sym Publish 0.1.0 · Ray
lm321mf.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lm321mf.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json lm321mf: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wit… · Ray
README.md lm321mf: specified limits as data (metadata.characteristics, 7 rows from the datasheet) · Ray

LM321MF

UMW · Operational Amplifier · SOT-23-5L

LM321MF from UMW, in a SOT-23-5L. 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 is 0V to V+ - 1.5V. Input bias current ~45nA (out of pin, PNP input stage).
2 V- power_in Negative supply / ground pin. Typically tied to GND in single-supply operation. Supply voltage (V+ - V-) up to 32V absolute maximum.
3 -IN input Inverting input of the op-amp. Input common-mode range is 0V to V+ - 1.5V. Input bias current ~45nA (out of pin, PNP input stage).
4 OUTPUT output Op-amp output. Output sourcing current typ 40mA, sinking current typ 20mA (V+=15V). Output short-circuit current to GND ~40mA.
5 V+ power_in Positive supply pin. Operating range +3V to +32V (single-supply); absolute max 32V (V+ - V-). Supply current typ 430uA at V+=5V.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23-5L
Category Op-amp/Cmp
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM321MF

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (V+ - V-) 32 V 2
Input Voltage -0.3 32 V 2
Junction Temperature 150 °C 2
Thermal Resistance to Ambient θJA 265 °C 2
Operating Temperature Range -40 85 °C 2
Storage Temperature Range -65 150 °C 2
Supply voltage range (wide supply voltage range feature) 3 32 V Feature listing: wide supply voltage range +3V to +32V 1

CAD (KiCad official)

  • Symbol: LM321MF
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: lm321mf-etched.step / lm321mf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm321mf.step / lm321mf.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm321mf.step 85 KB You want the bare part, or you mark your own boards.
lm321mf-etched.step 1.2 MB You want the part with LM321MF already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 315 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 (9 pp, sha256 0a42ee731ed21976, 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