SSP3485

{
  "schema_version": 1,
  "type": "component",
  "slug": "ssp3485",
  "title": "SSP3485",
  "brief": "Shanghai Siproin Microelectronics RS-485 / RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "ssp3485"
  ],
  "component": {
    "mpn": "SSP3485",
    "manufacturer": "Shanghai Siproin Microelectronics",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205251430_Shanghai-Siproin-Microelectronics-SSP3485_C2845064.pdf",
    "parts": {
      "symbol": "ssp3485.kicad_sym",
      "footprint": "ssp3485.kicad_mod",
      "model_3d": "ssp3485-etched.glb",
      "model_3d_plain": "ssp3485.glb",
      "model_3d_step": "ssp3485-etched.step",
      "model_3d_step_plain": "ssp3485.step",
      "lbr": "ssp3485.lbr"
    },
    "distributor_links": {
      "lcsc": "C2845064"
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output. Drives high when A-B ≥ -0.05 V, low when A-B ≤ -0.2 V, and high when A and B are open or shorted (fail-safe). High-Z when the receiver is disabled (RE high)."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Active-low receiver output enable. Receiver output RO is enabled when RE is low and is high-impedance when RE is high. TTL/CMOS input (VIH ≥ 2.0 V, VIL ≤ 0.8 V)."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable. Driver outputs A and B are enabled when DE is high and are high-impedance when DE is low. TTL/CMOS input (VIH ≥ 2.0 V, VIL ≤ 0.8 V)."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input. A low on DI forces A low and B high; a high on DI forces A high and B low (when DE is high). TTL/CMOS input with ~100 mV typical hysteresis."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting RS-485/RS-422 bus pin. Receiver differential input and driver differential output. ±15 kV HBM ESD protected; withstands -7 V to +12 V common-mode; 96 kΩ minimum input resistance (1/8 unit load)."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting RS-485/RS-422 bus pin. Receiver differential input and driver differential output. ±15 kV HBM ESD protected; withstands -7 V to +12 V common-mode; 96 kΩ minimum input resistance (1/8 unit load)."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input, +5 V nominal (absolute max -0.3 V to +7 V). Bypass to GND with a 0.1 µF ceramic capacitor close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205251430_Shanghai-Siproin-Microelectronics-SSP3485_C2845064.pdf",
        "pages": 11,
        "sha256": "b727d1cfb78b48a8",
        "source_tier": "lcsc"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ssp3485.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": "ssp3485-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": "1c1d22a5c2fe0a8f3b3fd1e69e654e2280fd17b187302123813dd558bbfc28b0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shanghai Siproin Microelectronics",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ssp3485"
  ],
  "discovery_pitch": "SSP3485 (Shanghai Siproin Microelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ssp3485.kicad_sym",
    "ssp3485.kicad_mod",
    "ssp3485.glb",
    "ssp3485.step",
    "ssp3485-etched.step",
    "ssp3485.lbr",
    "docs/hero.png",
    "docs/ssp3485-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SSP3485",
      "kind": "packaging"
    },
    {
      "mpn": "SSP3485U",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T08:10:52.955Z"
}