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Ray Set visibility: public a62fc9e 1d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "adm1491ebrmz",
  "title": "ADM1491EBRMZ",
  "brief": "Analog Devices RS-485/RS-422 ICs, MSOP-10. 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-uart-485-232",
    "adm1491ebrmz",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ADM1491EBRMZ",
    "manufacturer": "Analog Devices",
    "package": "MSOP-10",
    "pin_count": 10,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "RS-485/RS-422 ICs",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1490E_1491E.pdf",
    "parts": {
      "symbol": "adm1491ebrmz.kicad_sym",
      "footprint": "adm1491ebrmz.kicad_mod",
      "model_3d": "adm1491ebrmz-hero.glb",
      "model_3d_plain": "adm1491ebrmz-etched.glb",
      "model_3d_step": "adm1491ebrmz-etched.step",
      "model_3d_step_plain": "adm1491ebrmz.step",
      "lbr": "adm1491ebrmz.lbr"
    },
    "distributor_links": {
      "lcsc": "C657960",
      "digikey": "505-ADM1491EBRMZ-ND",
      "mouser": "584-ADM1491EBRMZ"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T20:55:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-ADM1491EBRMZ-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-ADM1491EBRMZ",
        "status": "found",
        "lifecycle": "Restricted Availability"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output; high impedance when RE is high."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable; a low level enables the receiver output, a high level places it in high impedance."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable; a logic high enables the differential driver outputs, a logic low places them in high impedance."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input; with driver enabled, a logic low forces Y low and Z high while a logic high forces Y high and Z low."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "6",
        "name": "Y",
        "type": "output",
        "description": "Noninverting driver output Y, ESD protected to ±8 kV HBM."
      },
      {
        "number": "7",
        "name": "Z",
        "type": "output",
        "description": "Inverting driver output Z, ESD protected to ±8 kV HBM."
      },
      {
        "number": "8",
        "name": "B",
        "type": "input",
        "description": "Inverting receiver input B, ESD protected to ±8 kV HBM with 12 kΩ minimum input resistance."
      },
      {
        "number": "9",
        "name": "A",
        "type": "input",
        "description": "Noninverting receiver input A, ESD protected to ±8 kV HBM with 12 kΩ minimum input resistance."
      },
      {
        "number": "10",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, 5 V ± 5% (4.75 V to 5.25 V)."
      }
    ],
    "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",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Table 5 describes the driver enable and DI in terms of pins A and B, but the pin table and truth tab"
        ],
        "pages_sent": 16,
        "cost_usd": 0.1271,
        "at": "2026-10-30T20:55:13"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1490E_1491E.pdf",
        "pages": 16,
        "sha256": "74a5d8439f987121",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 10,
        "described": 10,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "adm1491ebrmz.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b8f88eac3ce221c2ccb0b5048f9ad49c2ef4af148f8ae50c4e232e357683f547",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "adm1491ebrmz-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "405bb406580262d844186a8d2ca3fb6032eed385aaf5351e0c5778cd1b08e67f",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "RM-10",
      "source_page": 14,
      "D": {
        "nom_mm": 3,
        "range_mm": [
          2.9,
          3.1
        ]
      },
      "E1": {
        "nom_mm": 3,
        "range_mm": [
          2.9,
          3.1
        ]
      },
      "E": {
        "nom_mm": 4.9,
        "range_mm": [
          4.65,
          5.15
        ]
      },
      "e": {
        "nom_mm": 0.5,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.1,
        "range_mm": [
          null,
          1.1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "adm1491ebrmz.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "MSOP-10",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "10"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "74a5d8439f987121d9a35ac32a2f080de75f29070e40b665bed8b7178894a37a",
      "rows": [
        {
          "name": "Supply Voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.75,
          "typ": null,
          "max": 5.25,
          "conditions": "4.75 V ≤ VCC ≤ 5.25 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Current, Outputs Enabled",
          "symbol": "ICC1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.2,
          "max": 2,
          "conditions": "Outputs unloaded, digital inputs = VCC or GND",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Current, Outputs Disabled",
          "symbol": "ICC2",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.8,
          "max": 1.5,
          "conditions": "Outputs unloaded, digital inputs = VCC or GND",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Differential Output Voltage, Loaded",
          "symbol": "|VOD2|",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 5,
          "conditions": "RL = 100 Ω (RS-422), see Figure 21",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Differential Output Voltage, Loaded",
          "symbol": "|VOD2|",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": 5,
          "conditions": "RL = 54 Ω (RS-485), see Figure 21",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Differential Output Voltage",
          "symbol": "|VOD3|",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": 5,
          "conditions": "−7 V ≤ VTEST ≤ +12 V, see Figure 22",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Delta VOD for Complementary Output States",
          "symbol": "∆|VOD2|",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "RL = 54 Ω or 100 Ω, see Figure 21",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Common-Mode Output Voltage",
          "symbol": "VOC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "RL = 54 Ω or 100 Ω, see Figure 21",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Delta VOC for Complementary Output States",
          "symbol": "∆|VOC|",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "RL = 54 Ω or 100 Ω, see Figure 21",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current (Y, Z)",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "DE = 0 V, VDD = 0 V or 5 V, VIN = 12 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current (Y, Z)",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "µA",
          "min": -100,
          "typ": null,
          "max": null,
          "conditions": "DE = 0 V, VDD = 0 V or 5 V, VIN = −7 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Short-Circuit Current",
          "symbol": "IOS",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "−7 V < VOUT < +12 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "DE, RE, DI",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "DE, RE, DI",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "DE, RE, DI",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Differential Input Threshold Voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": 0.2,
          "conditions": "−7 V < VCM < +12 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage Hysteresis",
          "symbol": "VHYS",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 30,
          "max": null,
          "conditions": "VCM = 0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Current (A, B)",
          "symbol": "II",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VCM = 12 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Current (A, B)",
          "symbol": "II",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.8,
          "typ": null,
          "max": null,
          "conditions": "VCM = −7 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Input Resistance",
          "symbol": "RIN",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 12,
          "typ": null,
          "max": 30,
          "conditions": "−7 V ≤ VCM ≤ +12 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "IOUT = +4.0 mA, VA − VB = −0.2 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "IOUT = −4.0 mA, VA − VB = +0.2 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Receiver Short-Circuit Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Three-State Output Leakage Current",
          "symbol": "IOZR",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VCC = 5.25 V, 0.4 V < VOUT < 2.4 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Driver Maximum Data Rate",
          "symbol": "",
          "kind": "timing",
          "unit": "Mbps",
          "min": 16,
          "typ": null,
          "max": null,
          "conditions": "TA = −40°C to +85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Propagation Delay",
          "symbol": "tDPLH, tDPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 11,
          "max": 17,
          "conditions": "RL = 54 Ω, CL = 100 pF, see Figure 23 and Figure 3",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Output Skew",
          "symbol": "tSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0.5,
          "max": 2,
          "conditions": "RL = 54 Ω, CL = 100 pF, tSKEW = |tDPLH − tDPHL|",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Rise Time/Fall Time",
          "symbol": "tDR, tDF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 8,
          "max": 15,
          "conditions": "RL = 54 Ω, CL = 100 pF, see Figure 23 and Figure 3",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Enable Time",
          "symbol": "tZH, tZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "RL = 110 Ω, CL = 50 pF, see Figure 24 and Figure 5",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Disable Time",
          "symbol": "tHZ, tLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "RL = 110 Ω, CL = 50 pF, see Figure 24 and Figure 5",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Propagation Delay",
          "symbol": "tPLH, tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 12,
          "max": 20,
          "conditions": "CL = 15 pF, see Figure 25 and Figure 4",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Skew",
          "symbol": "tSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0.4,
          "max": 2,
          "conditions": "CL = 15 pF, see Figure 25 and Figure 4",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Enable Time",
          "symbol": "tZH, tZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 13,
          "conditions": "RL = 1 kΩ, CL = 15 pF, see Figure 26 and Figure 6",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Disable Time",
          "symbol": "tHZ, tLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 13,
          "conditions": "RL = 1 kΩ, CL = 15 pF, see Figure 26 and Figure 6",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC to GND",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "TA = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Digital I/O Voltage (DE, RE)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Max is VCC + 0.3 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Input Voltage (DI)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Max is VCC + 0.3 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Voltage (RO)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
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