component

RS321BXF

Public Made by Adom

by adom

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

componentop-amp-cmprs321bxf
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs rs321bxf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json rs321bxf: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 17h ago
README.md rs321bxf: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 16d ago
rs321bxf-etched.fit.json rs321bxf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
rs321bxf-etched.glb rs321bxf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
rs321bxf-etched.step rs321bxf: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
rs321bxf.glb Publish 0.1.0 · Ray 1mo ago
rs321bxf.kicad_mod Publish 0.1.0 · Ray 1mo ago
rs321bxf.kicad_sym Publish 0.1.0 · Ray 1mo ago
rs321bxf.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 5 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
rs321bxf.step Publish 0.1.0 · Ray 1mo ago

RS321BXF

Jiangsu RUNIC Tech · Operational Amplifier · SOT-23-5

RS321BXF from Jiangsu RUNIC Tech, 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 common-mode input range from -0.1V to (V+)+0.1V at Vs=5.5V. Typical input bias current 1pA.
2 V- power_in Negative supply rail. Tie to ground for single-supply operation, or to a negative rail for dual supply (V+ to V- must be 2.5V-5.5V, 7V absolute max). Bypass with 0.1uF close to the pin.
3 -IN input Inverting analog input. Same rail-to-rail input range and bias-current characteristics as the +IN pin.
4 OUT output Rail-to-rail amplifier output. Swings to within ~8mV of the rails with RL=10kΩ (26mV with RL=2kΩ). Typical short-circuit current ~54mA, slew rate 0.5V/us.
5 V+ power_in Positive supply rail. Operating range 2.5V to 5.5V (referenced to V-), 7V absolute max. Bypass with a 10uF bulk cap and a 0.1uF ceramic close to the pin.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOT-23-5
Category Op-amp/Cmp
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • RS321BXF
  • RS321BXFXK
  • RS321BXFXM

CAD (KiCad official)

  • Symbol: RS321BXF
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: rs321bxf-etched.step / rs321bxf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs321bxf.step / rs321bxf.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
rs321bxf.step 85 KB You want the bare part, or you mark your own boards.
rs321bxf-etched.step 1.8 MB You want the part with RS321BXF already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 432 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: Jiangsu RUNIC Tech datasheet (14 pp, sha256 b8add6ae05137706, 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