CMT83085

{
  "schema_version": 1,
  "type": "component",
  "slug": "cmt83085",
  "title": "CMT83085",
  "brief": "HopeRF Micro electronics Isolated RS-485/422 Transceivers, SOIC-16-300mil. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "signal isolation devices",
    "cmt83085"
  ],
  "component": {
    "mpn": "CMT83085",
    "manufacturer": "HopeRF Micro electronics",
    "package": "SOIC-16-300mil",
    "pin_count": 16,
    "category": "Signal Isolation Devices",
    "subcategory": "Isolated RS-485/422 Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604430429135126528",
    "parts": {
      "symbol": "cmt83085.kicad_sym",
      "footprint": "cmt83085.kicad_mod",
      "model_3d": "cmt83085-etched.glb",
      "model_3d_plain": "cmt83085.glb",
      "model_3d_step": "cmt83085-etched.step",
      "model_3d_step_plain": "cmt83085.step",
      "lbr": "cmt83085.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "Isolation side 1 (logic side) supply voltage. Operating range 2.5V to 5.5V. Requires a 0.1µF bypass capacitor to GND1 placed as close to the pin as possible."
      },
      {
        "number": "2",
        "name": "GND1",
        "type": "power_in",
        "description": "Isolation side 1 ground reference. Must be tied together with pins 7 and 8."
      },
      {
        "number": "3",
        "name": "R",
        "type": "output",
        "description": "Receiver output. Digital output on the logic side that reflects the RS-485 bus differential input (A-B). Drives the host UART RX line."
      },
      {
        "number": "4",
        "name": "/RE",
        "type": "input",
        "description": "Receiver enable input, active low. When low, the receiver output R is enabled; when high, R is high-impedance. Has an internal pull-up (IPU ≤ 10µA)."
      },
      {
        "number": "5",
        "name": "DE",
        "type": "input",
        "description": "Driver enable input, active high. When high, the driver outputs A/B are enabled; when low, A/B are high-impedance. Has an internal pull-down (IPD ≈ -10µA)."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Driver transmit data input. Digital input on the logic side from the host UART TX line; drives the RS-485 bus outputs A/B when DE is high. Has internal pull-up (IPU ≤ 10µA)."
      },
      {
        "number": "7",
        "name": "GND1",
        "type": "power_in",
        "description": "Isolation side 1 ground reference (tied internally/externally to pin 2)."
      },
      {
        "number": "8",
        "name": "GND1",
        "type": "power_in",
        "description": "Isolation side 1 ground reference (tied internally/externally to pin 2)."
      },
      {
        "number": "9",
        "name": "GND2",
        "type": "power_in",
        "description": "Isolation side 2 (bus side) ground reference. Isolated from GND1 by the on-die isolation barrier."
      },
      {
        "number": "10",
        "name": "GND2",
        "type": "power_in",
        "description": "Isolation side 2 ground reference (tied together with pins 9 and 15)."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating or tie to GND2 for board layout convenience."
      },
      {
        "number": "12",
        "name": "A",
        "type": "bidirectional",
        "description": "RS-485 bus non-inverting driver output / receiver input. When the driver is disabled or VDD1/VDD2 loses power, A enters a high-impedance state to avoid loading the bus. Absolute-max bus voltage range -7V to +12V."
      },
      {
        "number": "13",
        "name": "B",
        "type": "bidirectional",
        "description": "RS-485 bus inverting driver output / receiver input. When the driver is disabled or VDD1/VDD2 loses power, B enters a high-impedance state to avoid loading the bus. Absolute-max bus voltage range -7V to +12V."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating or tie to GND2 for board layout convenience."
      },
      {
        "number": "15",
        "name": "GND2",
        "type": "power_in",
        "description": "Isolation side 2 ground reference (tied together with pins 9 and 10)."
      },
      {
        "number": "16",
        "name": "VDD2",
        "type": "power_in",
        "description": "Isolation side 2 (RS-485 bus side) supply voltage. Operating range 3.0V to 5.5V. Requires a 10µF bypass capacitor to GND2 placed as close to the pin as possible."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604430429135126528",
        "pages": 22,
        "sha256": "eba3fab9dcb0563f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "cmt83085-etched.step",
        "role": "eda",
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        "extents_mm": [
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        "zmin_mm": 0,
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HopeRF Micro electronics",
      "Package": "SOIC-16-300mil",
      "Category": "Signal Isolation Devices",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "cmt83085"
  ],
  "discovery_pitch": "CMT83085 (HopeRF Micro electronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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    "README.md",
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    "cmt83085.glb",
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    "cmt83085.lbr",
    "docs/hero.png",
    "docs/cmt83085-datasheet.pdf",
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    "viewers/footprint.html"
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T19:18:53.918Z"
}