HX3485-S

{
  "schema_version": 1,
  "type": "component",
  "slug": "hx3485-s",
  "title": "HX3485-S",
  "brief": "ZHHXDZ RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "hx3485-s",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "HX3485-S",
    "manufacturer": "ZHHXDZ",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755816277258711040",
    "parts": {
      "symbol": "hx3485-s.kicad_sym",
      "footprint": "hx3485-s.kicad_mod",
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      "model_3d_step": "hx3485-s-etched.step",
      "model_3d_step_plain": "hx3485-s.step",
      "lbr": "hx3485-s.lbr"
    },
    "distributor_links": {
      "lcsc": "C19186124"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T22:37:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver data output: when the receiver is enabled (RE low), RO goes high if V(A)-V(B) > -50mV and goes low if V(A)-V(B) < -200mV."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable, active low: RE low enables RO, RE high disables the receiver, and RE high with DE low puts the chip into low-power shutdown."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable: DE high enables the driver outputs, and DE low disables the driver and places its outputs in high impedance."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver data input: DI low forces A low and B high, and DI high forces A high and B low."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device; all voltages are referenced to this pin."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Bus terminal A (non-inverting): driver differential output and receiver non-inverting input, tied to the RS-485/RS-422 bus."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Bus terminal B (inverting): driver differential output and receiver inverting input, tied to the RS-485/RS-422 bus; ESD protected to ±15kV HBM."
      },
      {
        "number": "8",
        "name": "Vcc",
        "type": "power_in",
        "description": "Supply pin for 3.3V or 5V operation; the absolute maximum rating is 3.0V to +6.0V per the datasheet limits table."
      }
    ],
    "provenance": {
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        "cost_usd": 0.0326,
        "at": "2026-10-20T22:32:25"
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        "sha256": "55843297878d4f9e",
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-20",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "ZHHXDZ",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "55843297878d4f9e3e67cc2ca732acaf64c9710435649ecf1b062b0f5fa6c936",
      "rows": [
        {
          "name": "Logic input high voltage (DE, DI, RE)",
          "symbol": "VIH1",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
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        {
          "name": "Logic input low voltage (DE, DI, RE)",
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        {
          "name": "Receiver differential input threshold voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "mV",
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          "max": -50,
          "conditions": "-7V≤VCM≤+12V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Receiver input resistance",
          "symbol": "RIN",
          "kind": "electrical",
          "unit": "KΩ",
          "min": 96,
          "typ": null,
          "max": null,
          "conditions": "-7V≤VCM≤+12V",
          "source_page": 2,
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        },
        {
          "name": "Receiver output low voltage",
          "symbol": "VOL",
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          "unit": "V",
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          "conditions": "IO=4mA,VID=-1V",
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        {
          "name": "Receiver output tri-state leakage current",
          "symbol": "IOZR",
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          "unit": "uA",
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          "conditions": "0.4V≤VO≤2.4V",
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        },
        {
          "name": "Receiver output short-circuit current",
          "symbol": "IOSR",
          "kind": "electrical",
          "unit": "mA",
          "min": 7,
          "typ": null,
          "max": 95,
          "conditions": "0V≤VRO≤VCC",
          "source_page": 2,
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        {
          "name": "Differential output voltage change (DI change)",
          "symbol": "ΔVOD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "R=50Ω or R=27Ω, 图 1",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Receiver differential propagation delay skew",
          "symbol": "tRSKD",
          "kind": "timing",
          "unit": "ns",
          "min": -50,
          "typ": 10,
          "max": 50,
          "conditions": "VID 上升下降时间小于 15ns 图7,9",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Chip shutdown time",
          "symbol": "tSHDN",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": 200,
          "max": 600,
          "conditions": "",
          "source_page": 2,
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        },
        {
          "name": "Receiver enable to output low",
          "symbol": "tRZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 20,
          "max": 120,
          "conditions": "CL=100pF,S1 关断 图 2,8",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Receiver enable to output high",
          "symbol": "tRZH",
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          "conditions": "CL=100pF,S1 关断 图 2,8",
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          "name": "Receiver output low to disable",
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          "conditions": "CL=100pF,S2 关断 图 2,8",
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          "name": "Driver enable to output high from shutdown",
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          "name": "Maximum data rate",
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          "name": "Control input voltage (DE, RE)",
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          "name": "Storage temperature range",
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          "min": -65,
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          "conditions": "",
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        {
          "name": "Operating temperature range",
          "symbol": "TOP",
          "kind": "recommended_operating",
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          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        {
          "name": "Power dissipation (SOP-8)",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 471,
          "conditions": "SOP-8, above +70℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "10 s",
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          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "HX3485-S (ZHHXDZ) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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