component

MAX3078EM

Public Made by Adom

by adom

HGSEMI RS-485 / RS-422 ICs, SOP-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 max3078em: 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
max3078em-etched.fit.json max3078em: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
max3078em-etched.glb max3078em: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
max3078em-etched.step max3078em: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
max3078em.glb Publish 0.1.0 · Ray
max3078em.kicad_mod Publish 0.1.0 · Ray
max3078em.kicad_sym Publish 0.1.0 · Ray
max3078em.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
max3078em.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 max3078em: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md max3078em: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

MAX3078EM

HGSEMI · RS-485 / RS-422 ICs · SOP-8

MAX3078EM from HGSEMI, in a SOP-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 RO output Receiver output. When /RE is low, RO is high if (A-B) ≥ -50mV and low if (A-B) ≤ -200mV. Fail-safe pulls RO high when the bus is open or shorted. CMOS logic level output.
2 /RE input Receiver output enable (active low). RO is enabled when /RE is low; RO is high-impedance when /RE is high. Driving /RE high while DE is low places the device into low-power shutdown mode. Hot-swap input structure.
3 DE input Driver output enable (active high). Driver outputs A,B are enabled when DE is high; outputs are high-impedance when DE is low. Driving DE low while /RE is high places the device into low-power shutdown mode. Hot-swap input structure.
4 DI input Driver data input. When DE is high, a logic low on DI drives A low and B high; a logic high on DI drives A high and B low. CMOS input (V_IH ≥ 2V, V_IL ≤ 0.8V).
5 GND power_in Ground reference (0V).
6 A bidirectional Non-inverting RS-485/RS-422 bus line. Acts as receiver non-inverting input and driver non-inverting output (half-duplex). Absolute range -7V to +12V, ±16kV IEC 61000-4-2 ESD protected. Receiver input impedance ≥96kΩ (1/8 unit load).
7 B bidirectional Inverting RS-485/RS-422 bus line. Acts as receiver inverting input and driver inverting output (half-duplex). Absolute range -7V to +12V, ±16kV IEC 61000-4-2 ESD protected. Receiver input impedance ≥96kΩ (1/8 unit load).
8 VCC power_in Positive supply, 3.15V ≤ VCC ≤ 3.45V (nominal 3.3V). Bypass to GND with a 0.1µF ceramic capacitor placed close to the pin.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category Interface
Pins 8

CAD (KiCad official)

  • Symbol: MAX3078EM
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: max3078em-etched.step / max3078em-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3078em.step / max3078em.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
max3078em.step 122 KB You want the bare part, or you mark your own boards.
max3078em-etched.step 1.9 MB You want the part with MAX3078EM already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 471 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: HGSEMI datasheet (17 pp, sha256 28c5129bb8242502, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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