component

LM321M5X

Public Made by Adom

by adom

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

componentop-amp-cmplm321m5x
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm321m5x: 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
lm321m5x-etched.fit.json lm321m5x: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm321m5x-etched.glb lm321m5x: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm321m5x-etched.step lm321m5x: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm321m5x.glb Publish 0.1.0 · Ray
lm321m5x.kicad_mod Publish 0.1.0 · Ray
lm321m5x.kicad_sym Publish 0.1.0 · Ray
lm321m5x.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
lm321m5x.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 Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray
README.md lm321m5x: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM321M5X

HGSEMI · Operational Amplifier · SOT-23-5

LM321M5X from HGSEMI, 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 op-amp input. Input common-mode range includes ground and extends to V+ − 1.5V. Typical input bias current 45nA (out of the pin, PNP input stage).
2 V- power_in Negative supply / ground pin. Tie to GND for single-supply operation, or to a negative rail for dual-supply operation. Supply voltage (V+ − V-) up to 32V absolute maximum, 3V to 30V operating.
3 -IN input Inverting op-amp input. Input common-mode range includes ground and extends to V+ − 1.5V. Typical input bias current 45nA (out of the pin, PNP input stage).
4 OUTPUT output Op-amp output. Class-AB stage capable of sourcing ~40mA and sinking up to ~20mA into 2V; slew rate 0.4V/µs; stable driving large capacitive loads. Short-circuit-to-ground current is approximately 40mA (see Absolute Maximum Ratings).
5 V+ power_in Positive supply pin. Operating range 3V to 30V (32V absolute maximum V+ − V-). Bypass locally with a ceramic capacitor to V-/GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LM321M5X/TR
  • LM321M5XM7/TR

CAD (KiCad official)

  • Symbol: LM321M5X
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lm321m5x-etched.step / lm321m5x-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm321m5x.step / lm321m5x.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm321m5x.step 85 KB You want the bare part, or you mark your own boards.
lm321m5x-etched.step 1.4 MB You want the part with LM321M5X already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 363 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: HGSEMI datasheet (12 pp, sha256 8fd8769fe7308caf, 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