HT485EARZ

{
  "slug": "ht485earz",
  "version": "0.1.0",
  "type": "component",
  "description": "HTCSEMI RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ht485earz",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ht485earz.kicad_sym",
    "ht485earz.kicad_mod",
    "ht485earz.glb",
    "ht485earz.step",
    "ht485earz.lbr",
    "docs/hero.png",
    "docs/ht485earz-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ht485earz-hero.glb",
    "ht485earz-hero.overlay.json",
    "ht485earz-etched.glb"
  ],
  "component": {
    "mpn": "HT485EARZ",
    "manufacturer": "HTCSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944392523042816",
    "parts": {
      "symbol": "ht485earz.kicad_sym",
      "footprint": "ht485earz.kicad_mod",
      "model_3d": "ht485earz-hero.glb",
      "model_3d_plain": "ht485earz-etched.glb",
      "model_3d_step": "ht485earz-etched.step",
      "model_3d_step_plain": "ht485earz.step",
      "lbr": "ht485earz.lbr"
    },
    "distributor_links": {
      "lcsc": "C2834462"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T20:45:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output, three-state; high when A-B ≥ +0.2V or the input is open, low when A-B ≤ -0.2V, and high-impedance when RE is high."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable, active low; RE low enables RO and RE high puts RO in high impedance, with input thresholds VIH 2.0V and VIL 0.8V."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable; DE high enables the driver outputs and DE low puts them in high impedance, with input thresholds VIH 2.0V and VIL 0.8V."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input; with the driver enabled a high on DI gives Y high and Z low, and a low on DI gives the opposite, with input range -0.5V to (VCC+0.5V)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; all voltages are referenced to device ground."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting receiver input and non-inverting driver output on the RS-485/RS-422 bus, rated -8V to +12.5V with ±15kV HBM ESD protection."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting receiver input and inverting driver output on the RS-485/RS-422 bus, rated -8V to +12.5V with ±15kV HBM ESD protection."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, operating from a single 5V ±5% supply with an absolute maximum of 12V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pinout is printed as a shared 'DIP/SO' diagram; the D-suffix SOIC-8 is assumed to be the HT485EARZ p; Datasheet uses Y/Z for driver outputs in the timing and truth table but A/B on the pinout; the Y/Z-t",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 4,
        "cost_usd": 0.251,
        "at": "2026-10-17T20:43:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944392523042816",
        "pages": 4,
        "sha256": "3fee97d5f7c82d64",
        "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"
    },
    "models_3d": [
      {
        "file": "ht485earz.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ht485earz-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "da69823ae1a29f8061618a53925e6520ddb672b29471c362e4bc2b29a196a809",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}