HD622A

{
  "slug": "hd622a",
  "version": "0.1.0",
  "type": "component",
  "description": "Broadic RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "interface",
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  "dependencies": {},
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    "hd622a.step",
    "hd622a.lbr",
    "docs/hero.png",
    "docs/hd622a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "hd622a-hero.overlay.json"
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  "component": {
    "mpn": "HD622A",
    "manufacturer": "Broadic",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603079467158433792",
    "parts": {
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      "model_3d_step_plain": "hd622a.step",
      "lbr": "hd622a.lbr"
    },
    "distributor_links": {
      "lcsc": "C18208853"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T23:54:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 514 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
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    },
    "pins": [
      {
        "number": "1",
        "name": "VB",
        "type": "power_in",
        "description": "Bus voltage input pin, which the datasheet rates for a receive high-level bus voltage of 18 V to 45 V."
      },
      {
        "number": "2",
        "name": "RIDD",
        "type": "passive",
        "description": "Bus current setting pin where an external RRIDD resistor sets the bus static current, with the datasheet recommending 20 kΩ to 200 kΩ and giving VRIDD of 5.9 V typical at 50 kΩ."
      },
      {
        "number": "3",
        "name": "SC",
        "type": "passive",
        "description": "Receive demodulation capacitor pin, where the datasheet specifies Csc = 1 µF and SC voltage of 3.7 V to 4.0 V (3.85 V typical)."
      },
      {
        "number": "4",
        "name": "STC",
        "type": "power_out",
        "description": "5 V regulator output pin, where the datasheet specifies Cstc = 10 µF and STC voltage of 5.0 V to 5.5 V (5.2 V typical), with up to 30 mA of drive current available."
      },
      {
        "number": "5",
        "name": "TX",
        "type": "output",
        "description": "Data output pin, which the datasheet specifies with a high level of 3.2 V to 3.4 V and a low level of 0 V to 0.3 V, with a default 3.3 V logic level."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_out",
        "description": "3.3 V regulator output pin, where the datasheet specifies Cvdd = 1 µF and VDD voltage of 3.2 V to 3.4 V (3.3 V typical), with up to 30 mA of drive current shared with STC."
      },
      {
        "number": "7",
        "name": "RX",
        "type": "input",
        "description": "Data input pin, which the datasheet rates for an input high level of 2 V to 5 V, an input low level of 0 V to 1.6 V, and an input voltage range of 0 V to 5.5 V (absolute maximum -0.3 V to 5.5 V)."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, to which all voltages in the datasheet are referenced unless otherwise stated."
      }
    ],
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin limits quoted in the descriptions come from the DC characteristics and absolute maximum tables o; The package outline and top-view pin diagram are not in the extracted text (page 8 has only a captio; VB is the bus voltage input and is listed as a receive threshold/voltage range; the KiCad type power"
        ],
        "pages_sent": 8,
        "cost_usd": 0.04,
        "at": "2026-10-09T23:52:09"
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        "sha256": "69f9817bac2c8542",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
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        "refuses_to_fabricate": true
      }
    },
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}