MS1285

{
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  "type": "component",
  "slug": "ms1285",
  "title": "MS1285",
  "brief": "Hangzhou Ruimeng Tech RS-485 / RS-422 ICs, SOIC-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": [
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    "interface",
    "ms1285",
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  "component": {
    "mpn": "MS1285",
    "manufacturer": "Hangzhou Ruimeng Tech",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
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    "distributor_links": {
      "lcsc": "C178327"
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    "distributor_check": {
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
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    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output that follows the A-B differential input, with VOH of 4.2 V to 4.8 V and VOL of 0.1 V to 0.2 V at IOUT = -1.5 mA and VID = 200 mV, and a short-circuit current limit of 7 mA."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Active-low receiver enable; driving RE high puts the receiver output RO into high impedance."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Active-high driver enable; driving DE low puts the driver outputs A and B into high impedance."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver data input with VIH minimum 2 V and VIL maximum 0.8 V, and input current of ±2 µA."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "RS-485 bus port A, with receiver common-mode range of -7 V to +12 V and ±20 kV HBM ESD protection."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "RS-485 bus port B, with receiver common-mode range of -7 V to +12 V and ±20 kV HBM ESD protection."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply with a recommended operating range of 4.5 V to 7 V and an absolute maximum rating of -0.5 V to +8 V."
      }
    ],
    "provenance": {
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        "at": "2026-10-17T23:43:48"
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  "metadata": {
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      "Manufacturer": "Hangzhou Ruimeng Tech",
      "Package": "SOIC-8",
      "Category": "Interface",
      "Pins": "8"
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          "name": "Logic input current",
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          "name": "Bus pin input current",
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          "name": "Receiver output high-level voltage",
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          "kind": "electrical",
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          "typ": 4.8,
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          "name": "Receiver output low-level voltage",
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          "source_page": 3,
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          "name": "Receiver tri-state (high-impedance) output current",
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          "kind": "electrical",
          "unit": "uA",
          "min": -1,
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          "conditions": "VCC=5V, 0V≤VOUT≤VCC",
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          "name": "Supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.48,
          "max": 0.9,
          "conditions": "No load, RE=DE=DI=0V or VCC",
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          "conditions": "VOUT=-7V",
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          "name": "A, B pin ESD protection (human body model)",
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