THVD1450 RS-485 Transceiver

{
  "schema_version": 1,
  "type": "component",
  "slug": "thvd1450",
  "title": "THVD1450 RS-485 Transceiver",
  "brief": "5 V half-duplex RS-485 transceiver with wide common-mode range and bus protection.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "rs-485",
    "transceiver",
    "interface",
    "5v",
    "robust",
    "ti",
    "soic-8"
  ],
  "component": {
    "mpn": "THVD1450",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 Transceiver",
    "datasheet": "https://www.ti.com/lit/ds/symlink/thvd1450.pdf",
    "parts": {
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      "footprint": "thvd1450.kicad_mod",
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      "model_3d_step_plain": "thvd1450.step",
      "lbr": "thvd1450.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "R",
        "type": "output",
        "description": "Receive data output. CMOS-level digital output representing the demodulated differential state of the A/B bus lines."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver enable, active low. Internal 2-MΩ pull-up to VCC keeps the receiver disabled if left floating."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver enable, active high. Internal 2-MΩ pull-down to GND keeps the driver disabled (bus high-Z) if left floating."
      },
      {
        "number": "4",
        "name": "D",
        "type": "input",
        "description": "Driver data input. CMOS-level digital input; when the driver is enabled, D=high forces A>B and D=low forces B>A."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference for logic supply and bus common-mode."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "RS-485/RS-422 differential bus I/O port A (non-inverting), complementary to B. Withstands ±18-kV IEC 61000-4-2 contact discharge and ±15-V common-mode."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "RS-485/RS-422 differential bus I/O port B (inverting), complementary to A. Withstands ±18-kV IEC 61000-4-2 contact discharge and ±15-V common-mode."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "3.3-V to 5-V single supply (operating range 3 V to 5.5 V). Bypass locally with 100-nF ceramic to GND."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/thvd1450.pdf",
        "pages": 54,
        "sha256": "58ecc4cc07dd1d32",
        "source_tier": "mfr"
      },
      "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"
    },
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        "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": "thvd1450-etched.step",
        "role": "eda",
        "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": "013c887790234083ed55e868c6699bfd8d43287dbfd6fe4e0d548ec612a7f944",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Half-duplex RS-485 transceiver",
      "Supply voltage": "4.5 V to 5.5 V",
      "Data rate": "Up to 500 kbps",
      "Common-mode range": "-20 V to 25 V",
      "Bus protection": "IEC 61000-4-2 ESD",
      "Bus loading": "Up to 256 nodes",
      "Operating temperature": "-40 C to 125 C"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "RS-485 transceiver",
    "robust 485",
    "industrial serial",
    "Modbus transceiver"
  ],
  "discovery_pitch": "A rugged 5 V RS-485 transceiver with wide common-mode range and bus fault protection for harsh industrial networks.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "thvd1450.glb",
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    "thvd1450.lbr",
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    "viewers/symbol.html",
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  "variants": [
    {
      "mpn": "THVD1450D",
      "kind": "unknown"
    },
    {
      "mpn": "THVD1450DGK",
      "kind": "unknown"
    },
    {
      "mpn": "THVD1450DRB",
      "kind": "unknown"
    }
  ]
}