component

SP3490EN-L

Public Made by Adom

by adom

MaxLinear RS-485 / RS-422 ICs, SOIC-8. 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 sp3490en-l: 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
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 sp3490en-l: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md sp3490en-l: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray
sp3490en-l-etched.fit.json sp3490en-l: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
sp3490en-l-etched.glb sp3490en-l: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
sp3490en-l-etched.step sp3490en-l: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
sp3490en-l.glb Publish 0.1.0 · Ray
sp3490en-l.kicad_mod Publish 0.1.0 · Ray
sp3490en-l.kicad_sym Publish 0.1.0 · Ray
sp3490en-l.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
sp3490en-l.step Publish 0.1.0 · Ray

SP3490EN-L

MaxLinear · RS-485 / RS-422 ICs · SOIC-8

SP3490EN-L from MaxLinear, in a SOIC-8. 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 VCC power_in Positive supply. Operating range +3.00V to +3.60V (typ 3.3V). Bypass to GND with a local decoupling capacitor.
2 R output Receiver output. CMOS-level digital output driven from the differential receiver comparing pins A and B. Fail-safe HIGH when the A/B inputs are open. VOH = VCC-0.4V at IO=-1.5mA; VOL = 0.4V at IO=+2.5mA.
3 D input Driver input. CMOS logic input that determines the polarity of the differential driver outputs Y and Z. VIH = 2.0V min, VIL = 0.8V max, input current ±10µA max.
4 GND power_in Ground connection. Common return for supply, logic, and differential drivers/receivers.
5 Y output Non-inverting driver output. Half of the RS-485/RS-422 differential driver pair (Y/Z). Differential output ≥1.5V into 27Ω (RS-485) and ≥2V into 50Ω (RS-422). Withstands -7V to +12V bus common-mode.
6 Z output Inverting driver output. Complement of Y for the differential driver pair. Short-circuit current limited to ±250mA over -7V ≤ VO ≤ +12V.
7 B input Inverting receiver input. Half of the RS-485/RS-422 differential receiver pair (A/B). Differential threshold ±200mV, input resistance ≥12kΩ, common-mode range -7V to +12V.
8 A input Non-inverting receiver input. Half of the RS-485/RS-422 differential receiver pair. Fail-safe circuitry forces R HIGH when A/B are left open.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOIC-8
Category Interface
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • SP3490EN-LCN-L
  • SP3490EN-LCN-L/TR
  • SP3490EN-L
  • SP3490EN-L/TR
  • SP3491CN-L
  • SP3491CN-L/TR
  • SP3491EN-L
  • SP3491EN-L/TR

CAD (KiCad official)

  • Symbol: SP3490EN-L
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: sp3490en-l-etched.step / sp3490en-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3490en-l.step / sp3490en-l.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sp3490en-l.step 122 KB You want the bare part, or you mark your own boards.
sp3490en-l-etched.step 2.0 MB You want the part with SP3490EN-L already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 504 faces against 147 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: MaxLinear datasheet (12 pp, sha256 3d8c54220a22cdb1, retrieved 2026-08-17, tier: manufacturer)
  • 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