MAX3078EM

{
  "schema_version": 1,
  "type": "component",
  "slug": "max3078em",
  "title": "MAX3078EM",
  "brief": "HGSEMI RS-485 / RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "max3078em"
  ],
  "component": {
    "mpn": "MAX3078EM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1d2c0cdaefed661304aa36927babcaa4.pdf",
    "parts": {
      "symbol": "max3078em.kicad_sym",
      "footprint": "max3078em.kicad_mod",
      "model_3d": "max3078em-etched.glb",
      "model_3d_plain": "max3078em.glb",
      "model_3d_step": "max3078em-etched.step",
      "model_3d_step_plain": "max3078em.step",
      "lbr": "max3078em.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "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."
      },
      {
        "number": "2",
        "name": "/RE",
        "type": "input",
        "description": "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."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "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."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "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)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0V)."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "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)."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "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)."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 3.15V ≤ VCC ≤ 3.45V (nominal 3.3V). Bypass to GND with a 0.1µF ceramic capacitor placed close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1d2c0cdaefed661304aa36927babcaa4.pdf",
        "pages": 17,
        "sha256": "28c5129bb8242502",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "max3078em.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "max3078em-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e978e2d12679d669f49597de84d239d2add81101546378220807aec86ed907ef",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "max3078em"
  ],
  "discovery_pitch": "MAX3078EM (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "max3078em.kicad_sym",
    "max3078em.kicad_mod",
    "max3078em.glb",
    "max3078em.step",
    "max3078em-etched.step",
    "max3078em.lbr",
    "docs/hero.png",
    "docs/max3078em-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-28T18:28:14.399Z"
}