MAX485ESA

{
  "schema_version": 1,
  "type": "component",
  "slug": "max485esa",
  "title": "MAX485ESA",
  "brief": "UMW 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",
    "max485esa"
  ],
  "component": {
    "mpn": "MAX485ESA",
    "manufacturer": "UMW",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "docs/max485esa-datasheet.pdf",
    "parts": {
      "symbol": "max485esa.kicad_sym",
      "footprint": "max485esa.kicad_mod",
      "model_3d": "max485esa-etched.glb",
      "model_3d_plain": "max485esa.glb",
      "model_3d_step": "max485esa-etched.step",
      "model_3d_step_plain": "max485esa.step",
      "lbr": "max485esa.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver Output. Digital CMOS output of the RS-485 receiver. Logic-high when A-B >= +0.2V, logic-low when A-B <= -0.2V, and high-impedance when RE is high (receiver disabled). VOH >= 3.5V at IO=-4mA, VOL <= 0.4V at IO=4mA."
      },
      {
        "number": "2",
        "name": "~RE",
        "type": "input",
        "description": "Receiver Output Enable, active-low. Drive low to enable receiver (RO active), drive high to place RO into high-impedance state. CMOS logic input referenced to VCC (VIH >= 2V, VIL <= 0.8V, IIN = ±2µA max)."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver Output Enable, active-high. Drive high to enable the RS-485 driver outputs A and B, drive low to place A and B into high-impedance. CMOS logic input (VIH >= 2V, VIL <= 0.8V, IIN = ±2µA max)."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver Input. CMOS logic input carrying the transmit data to be driven onto the RS-485 differential bus. When DE=1: DI=1 forces A=1/B=0, DI=0 forces A=0/B=1. VIH >= 2V, VIL <= 0.8V, IIN = ±2µA max."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device. Must be tied to system ground."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting RS-485/RS-422 differential bus line. Acts as a driver output when DE=1 and as a receiver input when RE is low. Absolute range -8V to +12.5V; common-mode range -7V to +12V; receiver input resistance >= 12kΩ."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting RS-485/RS-422 differential bus line. Acts as a driver output when DE=1 and as a receiver input when RE is low. Absolute range -8V to +12.5V; common-mode range -7V to +12V; receiver input resistance >= 12kΩ."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input, 5V ±5%. No-load supply current typically 500µA (DE=VCC) or 300µA (DE=0, RE tied high or low). Absolute maximum 7V. Bypass to GND with a 0.1µF ceramic close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "docs/max485esa-datasheet.pdf",
        "pages": 9,
        "sha256": "e4e2116cdfbdf558",
        "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": "max485esa.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": "max485esa-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": "37f4e12c031b6f4d285fba863851d50050f4c8757c135810952f25c56e23a910",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "max485esa"
  ],
  "discovery_pitch": "MAX485ESA (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "max485esa.kicad_sym",
    "max485esa.kicad_mod",
    "max485esa.glb",
    "max485esa.step",
    "max485esa-etched.step",
    "max485esa.lbr",
    "docs/hero.png",
    "docs/max485esa-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "MAX485ESA",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T18:32:37.329Z"
}