CS4585EO

{
  "schema_version": 1,
  "type": "component",
  "slug": "cs4585eo",
  "title": "CS4585EO",
  "brief": "CRMICRO 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",
    "communication interface chip",
    "cs4585eo",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CS4585EO",
    "manufacturer": "CRMICRO",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Communication Interface Chip",
    "subcategory": "RS-485/RS-422 ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/7338f5392993300bc26a9a4e5fdb311d.pdf",
    "parts": {
      "symbol": "cs4585eo.kicad_sym",
      "footprint": "cs4585eo.kicad_mod",
      "model_3d": "cs4585eo-hero.glb",
      "model_3d_plain": "cs4585eo.glb",
      "model_3d_step": "cs4585eo-etched.step",
      "model_3d_step_plain": "cs4585eo.step",
      "lbr": "cs4585eo.lbr"
    },
    "distributor_links": {
      "lcsc": "C7421641"
    },
    "distributor_check": {
      "checked_at": "2026-11-13T08:56:42Z",
      "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 output (tri-state) that is high when A-B ≥ -0.05V or when A and B are open or shorted, and low when A-B ≤ -0.2V."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Active-low receiver output enable that enables RO when low and puts RO in high impedance when high."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable that enables the driver outputs when high and puts them in high impedance when low."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input where DI low gives A low and B high, and DI high gives A high and B low."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Receiver input and driver output (non-inverting RS-485 bus line) with ±15kV HBM ESD protection and a -7V to +12V common-mode range."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Receiver input and driver output (inverting RS-485 bus line) with ±15kV HBM ESD protection and a -7V to +12V common-mode range."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply, 5V ±5% operating with an absolute maximum of -0.3 to 7V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet covers CS4585EO and CS4585EP but does not state which suffix maps to which package. SO; The pin table on page 4 describes pins 3 and 4 with the names Y and Z for the driver outputs, while ; The datasheet gives no function text for GND (pin 5) or VDD (pin 8) beyond 'ground' and 'power suppl",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0184,
        "at": "2026-11-13T08:56:30"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/7338f5392993300bc26a9a4e5fdb311d.pdf",
        "pages": 13,
        "sha256": "7a7405a0b6a7ceb0",
        "source_tier": "lcsc"
      },
      "cad": "land: KiCad official (CC-BY-SA 4.0); 3D: generated from the datasheet",
      "model_3d_generated": {
        "generator": "factory/gen_pkg3d.py",
        "family": "SOIC",
        "height_mm": 1.4,
        "height_basis": "datasheet A, midpoint of min and max",
        "standoff_mm": 0.15,
        "standoff_basis": "family nominal (no datasheet A1 read)",
        "lead_width_mm": 0.36,
        "lead_width_basis": "default: 0.6 x pad width across the lead, at most 0.45 x pitch 1.27 mm; a tab 0.9 x its width (no datasheet b read)",
        "lead_thickness_mm": 0.2,
        "lead_thickness_basis": "default for pitch 1.27 mm, height 1.4 mm (no datasheet c read)"
      },
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cs4585eo.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.4
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "eef19caeddfb18c35d0131818971b6a8f457e1993f6c4e02960c9cbbf5cb2169",
        "checked": "2026-11-13",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cs4585eo-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.4
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "deffda65d1118f7779aa0fe904c0fc84de1041eaa18665c6a6e115d5392f4638",
        "checked": "2026-11-13",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOP8",
      "source_page": 10,
      "D": {
        "nom_mm": 4.9,
        "range_mm": [
          4.8,
          5
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4
        ]
      },
      "E": {
        "nom_mm": 6,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.4,
        "range_mm": [
          1.3,
          1.5
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "cs4585eo.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "CRMICRO",
      "Package": "SOP-8",
      "Category": "Communication Interface Chip",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "7a7405a0b6a7ceb07c4afe8d5b3bdc617eebdc10c526abcf9d22a784057be3c9",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "A/B input/output voltage",
          "symbol": "VINA/B / VOUTA/B",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -13,
          "typ": null,
          "max": 13,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "Tamb",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential output voltage (no load)",
          "symbol": "VOD1",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VDD=5V 5%, Tamb=25℃; 无负载",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential output voltage (RS-422 load)",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; R=50Ω（RS-422）(1)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential output voltage (RS-485 load)",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; R=27Ω（RS-485）(1)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in differential output voltage magnitude",
          "symbol": "ΔVOD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.01,
          "max": 0.2,
          "conditions": "VDD=5V 5%, Tamb=25℃; R=50Ω or 27Ω(1)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Common-mode output voltage",
          "symbol": "VOC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "VDD=5V 5%, Tamb=25℃; R=50Ω or 27Ω(1)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in common-mode output voltage magnitude",
          "symbol": "ΔVOC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.01,
          "max": 0.2,
          "conditions": "VDD=5V 5%, Tamb=25℃; R=50Ω or 27Ω(1)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Digital input high-level voltage",
          "symbol": "VIH1",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE、RE、DI",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Digital input low-level voltage",
          "symbol": "VIL1",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE、RE、DI",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Digital input current",
          "symbol": "IIN1",
          "kind": "electrical",
          "unit": "A",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE、RE、DI",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "A/B input current",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE=GND, VDD=GND or 5.25V, Vin=12V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "A/B input current",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "A",
          "min": -75,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE=GND, VDD=GND or 5.25V, Vin=-7V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver output short-circuit current",
          "symbol": "IOD1",
          "kind": "electrical",
          "unit": "mA",
          "min": -250,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; -7V≤VOUT≤VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver output short-circuit current",
          "symbol": "IOD1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "VDD=5V 5%, Tamb=25℃; 0V≤VOUT≤12V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver output short-circuit current",
          "symbol": "IOD1",
          "kind": "electrical",
          "unit": "mA",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "VDD=5V 5%, Tamb=25℃; 0V≤VOUT≤VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential receiver threshold voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "mV",
          "min": -200,
          "typ": -125,
          "max": -50,
          "conditions": "VDD=5V 5%, Tamb=25℃; -7V≤VCM≤12V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver output high voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.5,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; IO=-4mA, VID=-50mV",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver output low voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VDD=5V 5%, Tamb=25℃; IO=4mA, VID=-200mV",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver three-state output current",
          "symbol": "IOZR",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDD=5V 5%, Tamb=25℃; 0.4V≤VO≤2.4V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver input resistance",
          "symbol": "RIN",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 96,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; -7V≤VCM≤12V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver output short-circuit current",
          "symbol": "IOSR",
          "kind": "electrical",
          "unit": "mA",
          "min": 7,
          "typ": null,
          "max": 95,
          "conditions": "VDD=5V 5%, Tamb=25℃; 0V≤VRO≤VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating supply current (driver enabled)",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 430,
          "max": 900,
          "conditions": "VDD=5V 5%, Tamb=25℃; 无负载，RE=DI=GND or VDD, DE=VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating supply current (driver disabled)",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 375,
          "max": 600,
          "conditions": "VDD=5V 5%, Tamb=25℃; 无负载，RE=DI=GND or VDD, DE=GND",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Shutdown mode supply current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.001,
          "max": 10,
          "conditions": "VDD=5V 5%, Tamb=25℃; DE=GND, RE=VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD protection (A/B) Human Body Model",
          "symbol": "ESD",
          "kind": "electrical",
          "unit": "kV",
          "min": 15,
          "typ": null,
          "max": null,
          "conditions": "VDD=5V 5%, Tamb=25℃; Human Body Model",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver input-to-output delay (limited slew)",
          "symbol": "tDPLH",
          "kind": "timing",
          "unit": "ns",
          "min": 250,
          "typ": 720,
          "max": 1000,
          "conditions": "VDD=5V 5%, Tamb=25℃; RDIFF=54Ω, CL1=CL2=100pF(2)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver propagation delay skew (limited slew)",
          "symbol": "tDSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": -3,
          "typ": null,
          "max": 100,
          "conditions": "VDD=5V 5%, Tamb=25℃; RDIFF=54Ω, CL1=CL2=100pF(2)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver rise/fall time (limited slew)",
          "symbol": "tDR,tDF",
          "kind": "timing",
          "unit": "ns",
          "min": 200,
          "typ": 530,
          "max": 750,
          "conditions": "VDD=5V 5%, Tamb=25℃; RDIFF=54Ω, CL1=CL2=100pF(2)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum data rate (limited slew)",
          "symbol": "fMAX",
          "kind": "timing",
          "unit": "kbps",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "VDD=5V 5%, Tamb=25℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver enable delay to high (limited slew)",
          "symbol": "tDZH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 2500,
          "conditions": "VDD=5V 5%, Tamb=25℃; CL=100pF, S2 closed(3)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver enable delay to low (limited slew)",
          "symbol": "tDZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 2500,
          "conditions": "VDD=5V 5%, Tamb=25℃; CL=100pF, S1 closed(3)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver disable delay from low (limited slew)",
          "symbol": "tDLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VDD=5V 5%, Tamb=25℃; CL=15pF, S1 closed(3)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver disable delay from high (limited slew)",
          "symbol": "tDHZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VDD=5V 5%, Tamb=25℃; CL=15pF, S2 closed(3)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver input-to-output delay low-to-high (limited slew)",
          "symbol": "tRPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 127,
          "max": 200,
          "conditions": "VDD=5V 5%, Tamb=25℃; |VID|≥2.0V, rise/fall time≤15ns(4)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver input-to-output delay high-to-low (limited slew)",
          "symbol": "tRPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 127,
          "max": 200,
          "conditions": "VDD=5V 5%, Tamb=25℃; |VID|≥2.0V, rise/fall time≤15ns(4)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver propagation delay skew (limited slew)",
          "symbol": "tRSKD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 3,
          "max": 30,
          "conditions": "VDD=5V 5%, Tamb=25℃; |VID|≥2.0V, rise/fall time≤15ns(4)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver enable delay to low (limited slew)",
          "symbol": "tRZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 20,
          "max": 50,
          "conditions": "VDD=5V 5%, Tamb=25℃; CL=100pF, S1 closed(5)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver enable delay to high (limited slew)",
          "symbol": "tRZH",
          "kind": "timing",
          "unit": "ns",
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