cbm3485as8

{
  "slug": "cbm3485as8",
  "version": "0.1.0",
  "type": "component",
  "description": "Corebai Microelectronics RS-485 / RS-422 ICs, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "cbm3485as8"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cbm3485as8.kicad_sym",
    "cbm3485as8.kicad_mod",
    "cbm3485as8.glb",
    "cbm3485as8.step",
    "cbm3485as8.lbr",
    "docs/hero.png",
    "docs/cbm3485as8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cbm3485as8-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray"
  },
  "component": {
    "mpn": "CBM3485AS8",
    "manufacturer": "Corebai Microelectronics",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "RS-485 / RS-422 ICs",
    "parts": {
      "symbol": "cbm3485as8.kicad_sym",
      "footprint": "cbm3485as8.kicad_mod",
      "model_3d": "cbm3485as8-etched.glb",
      "model_3d_plain": "cbm3485as8.glb",
      "model_3d_step": "cbm3485as8-etched.step",
      "model_3d_step_plain": "cbm3485as8.step",
      "lbr": "cbm3485as8.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output. Drives logic-high (VOH ≥ 2.5V at IO = -1.5mA) when A-B > +0.2V, logic-low (VOL ≤ 0.4V at IO = 2.5mA) when A-B < -0.2V. High-impedance when RE is high; guaranteed logic-high when the differential input is open (fail-safe)."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable, active-low. When low the receiver output RO is enabled; when high RO is placed into a high-impedance (three-state) condition. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable, active-high. When high the differential driver outputs A and B are enabled; when low the outputs are placed into a high-impedance state. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input. TTL/CMOS-compatible logic input transmitted onto the differential bus (A, B) when DE is asserted. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA. DI = 1 drives A high / B low; DI = 0 drives A low / B high."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / device 0V reference. All voltages are referenced to this pin."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting differential bus I/O. Driver non-inverting output when DE is high; receiver non-inverting input when RE is low. Common-mode range -7V to +12V; input resistance 12kΩ min; receiver differential threshold ±0.2V. ±15kV IEC61000-4-2 air / ±8kV contact ESD on bus pins."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting differential bus I/O. Driver inverting output when DE is high; receiver inverting input when RE is low. Common-mode range -7V to +12V; input resistance 12kΩ min; receiver differential threshold ±0.2V. ±15kV IEC61000-4-2 air / ±8kV contact ESD on bus pins."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, single 3.3V nominal (3.0V to 3.6V operating). No-load supply current 300µA typ (500µA typ with DE = VCC). Absolute maximum 7V."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "digikey": false,
      "mouser": false
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:55:02Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "models_3d": [
      {
        "file": "cbm3485as8.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": "cbm3485as8-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": "39dd5ff8725650a1a45c090e6be8eb2f925c169096b0f0a9966c1872df40861f",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}