MS2548

{
  "slug": "ms2548",
  "version": "0.1.0",
  "type": "component",
  "description": "Hangzhou Ruimeng Tech RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ms2548",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ms2548.kicad_sym",
    "ms2548.kicad_mod",
    "ms2548.glb",
    "ms2548.step",
    "ms2548.lbr",
    "docs/hero.png",
    "docs/ms2548-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ms2548-hero.glb",
    "ms2548-hero.overlay.json",
    "ms2548-etched.glb"
  ],
  "component": {
    "mpn": "MS2548",
    "manufacturer": "Hangzhou Ruimeng Tech",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/47560c6ee641d14e63ffbebc88faf385.pdf",
    "parts": {
      "symbol": "ms2548.kicad_sym",
      "footprint": "ms2548.kicad_mod",
      "model_3d": "ms2548-hero.glb",
      "model_3d_plain": "ms2548-etched.glb",
      "model_3d_step": "ms2548-etched.step",
      "model_3d_step_plain": "ms2548.step",
      "lbr": "ms2548.lbr"
    },
    "distributor_links": {
      "lcsc": "C42415856"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T23:28:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "R",
        "type": "output",
        "description": "Receiver output, which the datasheet describes as the receiver output pin (R) of the RS-485 receiver."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver enable: when high, the internal auto-direction circuit controls the receiver state; when low, the receiver is not controlled by auto-direction and its output level is set independently."
      },
      {
        "number": "3",
        "name": "SHDN",
        "type": "input",
        "description": "Chip enable, active high: when SHDN is low the transmitter output is high impedance, and SHDN low puts the chip into low-power shutdown drawing less than 10 µA supply current."
      },
      {
        "number": "4",
        "name": "D",
        "type": "input",
        "description": "Transmitter input: D low drives the bus low, and D high is held idle at high (driver shuts off once A-B exceeds VDT), so D should be held high when no data is sent."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Bus line A (I/O), which requires external pull-up and pull-down resistors to keep the bus in a defined state."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Bus line B (I/O), which requires external pull-up and pull-down resistors to keep the bus in a defined state."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin; the recommended supply voltage range is 4.5 V to 5.5 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin is named SHDN but the datasheet text describes it as an active-high chip enable, while the n; Pin descriptions for R, D, A and B are short in the source. Descriptions were drawn from the pin tab"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0366,
        "at": "2026-10-20T23:23:25"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/47560c6ee641d14e63ffbebc88faf385.pdf",
        "pages": 13,
        "sha256": "c3b512251063476a",
        "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"
    },
    "models_3d": [
      {
        "file": "ms2548.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ms2548-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "71d4a7ca753ceb8f5a908a0797111401b7fd087f68d05db9b4d0396eb816dc00",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}