main
Ray Set visibility: public a16852b 10d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "ltc2851is8-trpbf",
  "title": "LTC2851IS8#TRPBF",
  "brief": "Analog Devices RS-485/RS-422 ICs, SO-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",
    "interface ics",
    "ltc2851is8#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LTC2851IS8#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Interface ICs",
    "subcategory": "RS-485/RS-422 ICs",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/285012fe.pdf",
    "parts": {
      "symbol": "ltc2851is8-trpbf.kicad_sym",
      "footprint": "ltc2851is8-trpbf.kicad_mod",
      "model_3d": "ltc2851is8-trpbf-hero.glb",
      "model_3d_plain": "ltc2851is8-trpbf-etched.glb",
      "model_3d_step": "ltc2851is8-trpbf-etched.step",
      "model_3d_step_plain": "ltc2851is8-trpbf.step",
      "lbr": "ltc2851is8-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C682763",
      "digikey": "505-LTC2851IS8#TRPBFTR-ND",
      "mouser": "584-LTC2851IS8#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T21:16:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-LTC2851IS8#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LTC2851IS8#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 3V ≤ VCC ≤ 3.6V, bypass with a 0.1µF ceramic capacitor."
      },
      {
        "number": "2",
        "name": "RO",
        "type": "output",
        "description": "Receiver output: high when A > B by 200mV, low when A < B by 200mV, and high if the receiver inputs are open, shorted or terminated without a valid signal."
      },
      {
        "number": "3",
        "name": "DI",
        "type": "input",
        "description": "Driver input: a high forces Y high and Z low, a low forces Y low and Z high; the LTC2851 has no driver enable so the driver is always enabled."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "5",
        "name": "Y",
        "type": "output",
        "description": "Noninverting driver output, high impedance when the driver is disabled or unpowered."
      },
      {
        "number": "6",
        "name": "Z",
        "type": "output",
        "description": "Inverting driver output, high impedance when the driver is disabled or unpowered."
      },
      {
        "number": "7",
        "name": "B",
        "type": "input",
        "description": "Inverting receiver input, with impedance >96kΩ in receive mode or unpowered."
      },
      {
        "number": "8",
        "name": "A",
        "type": "input",
        "description": "Noninverting receiver input, with impedance >96kΩ in receive mode or unpowered."
      }
    ],
    "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 MPN LTC2850IS8#TRPBF does not appear verbatim in the datasheet. It was decoded from the ordering; The S8 pin numbers were assigned from the text layout of the PIN CONFIGURATION drawing on page 2 (pi; Pin types are KiCad classes assigned by function; the datasheet does not state them. A and B are bid"
        ],
        "pages_sent": 18,
        "cost_usd": 0.0923,
        "at": "2026-10-30T21:15:56"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/285012fe.pdf",
        "pages": 18,
        "sha256": "68e25e1cc3687b9f",
        "source_tier": "mfr"
      },
      "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": "ltc2851is8-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ltc2851is8-trpbf-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": "0f88354066420c98b4750a53cad32b027e7fee10a53422b52b04dfa4b21bee5b",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "S8",
      "source_page": 16,
      "D": {
        "nom_mm": 4.902,
        "range_mm": [
          4.801,
          5.004
        ]
      },
      "E1": {
        "nom_mm": 3.899,
        "range_mm": [
          3.81,
          3.988
        ]
      },
      "E": {
        "nom_mm": 5.994,
        "range_mm": [
          5.791,
          6.198
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.549,
        "range_mm": [
          1.346,
          1.753
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "ltc2851is8-trpbf.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "SO-8",
      "Category": "Interface ICs",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "68e25e1cc3687b9fcd2648a5384deb4b6619a82b6ead61d5465b556bd91790a2",
      "rows": [
        {
          "name": "Differential Driver Output Voltage (R = ∞, VCC = 3V)",
          "symbol": "|VOD|",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "R = ∞, VCC = 3V (Figure 1); VCC-level max printed as VCC",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Differential Driver Output Voltage (R = 27Ω, VCC = 3V)",
          "symbol": "|VOD|",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "R = 27Ω, VCC = 3V (Figure 1); VCC-level max printed as VCC",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Difference in Magnitude of Driver Differential Output Voltage",
          "symbol": "Δ|VOD|",
          "kind": "electrical",
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          "max": 0.2,
          "conditions": "R = 27Ω or 50Ω (Figure 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Driver Common Mode Output Voltage",
          "symbol": "VOC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "R = 27Ω or 50Ω (Figure 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Difference in Magnitude of Driver Common Mode Output Voltage",
          "symbol": "Δ|VOC|",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "R = 27Ω or 50Ω (Figure 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Driver Short-Circuit Current",
          "symbol": "IOSD",
          "kind": "electrical",
          "unit": "mA",
          "min": -250,
          "typ": 180,
          "max": 250,
          "conditions": "–7V ≤ (Y or Z) ≤ 12V (Figure 2)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input Current (A, B), VIN = 12V",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "DE = TE = 0V, VCC = 0V or 3.3V, VIN = 12V (Figure 3) (C, I-Grade)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input Current (A, B), VIN = -7V",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -100,
          "typ": null,
          "max": null,
          "conditions": "DE = TE = 0V, VCC = 0V or 3.3V, VIN = –7V (Figure 3) (C, I-Grade)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input Resistance",
          "symbol": "RIN",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 96,
          "typ": 125,
          "max": null,
          "conditions": "RE = VCC or 0V, DE = TE = 0V, VIN = –7V, –3V, 3V, 7V, 12V (Figure 3) (C, I-Grade)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Differential Input Threshold Voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": 0.2,
          "conditions": "–7V ≤ B ≤ 12V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output High Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": null,
          "conditions": "I(RO) = –4mA, A-B = 200mV, VCC = 3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Low Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "I(RO) = 4mA, A-B = –200mV, VCC = 3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Receiver Short-Circuit Current",
          "symbol": "IOSR",
          "kind": "electrical",
          "unit": "mA",
          "min": -85,
          "typ": null,
          "max": 85,
          "conditions": "0V ≤ RO ≤ VCC",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VCC = 3.6V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "VCC = 3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current",
          "symbol": "IINL",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": 0,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Data Rate",
          "symbol": "fMAX",
          "kind": "timing",
          "unit": "Mbps",
          "min": 20,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Input to Output Propagation Delay",
          "symbol": "tPLHD, tPHLD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 10,
          "max": 50,
          "conditions": "RDIFF = 54Ω, CL = 100pF (Figure 4)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Input to Output Difference",
          "symbol": "ΔtPD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 1,
          "max": 6,
          "conditions": "RDIFF = 54Ω, CL = 100pF (Figure 4)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Output Y to Output Z Skew",
          "symbol": "tSKEWD",
          "kind": "timing",
          "unit": "ns",
          "min": -6,
          "typ": 1,
          "max": 6,
          "conditions": "RDIFF = 54Ω, CL = 100pF (Figure 4)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Rise or Fall Time",
          "symbol": "tRD, tFD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 4,
          "max": 12.5,
          "conditions": "RDIFF = 54Ω, CL = 100pF (Figure 4)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input to Output Propagation Delay",
          "symbol": "tPLHR, tPHLR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 70,
          "conditions": "CL = 15pF, VCM = 1.5V, |VAB| = 1.5V, tR and tF < 4ns (Figure 6)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential Receiver Skew",
          "symbol": "tSKEWR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 1,
          "max": 6,
          "conditions": "CL = 15pF (Figure 6)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Rise or Fall Time",
          "symbol": "tRR, tFR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 3,
          "max": 12.5,
          "conditions": "CL = 15pF (Figure 6)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Current with Both Driver and Receiver Enabled",
          "symbol": "ICCTR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 450,
          "max": 1000,
          "conditions": "No Load, DE = VCC, RE = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (recommended)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range (LTC285xI)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Industrial grade (I)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (absolute maximum)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltages (DI)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "Pins RE, DE, DI; only DI applies to LTC2851",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Interface I/O Voltage (A, B, Y, Z)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "Minimum printed as (VCC – 15V)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Voltage (RO)",
          "symbol": "RO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as (VCC + 0.3V)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJMAX",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "S8 package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Ambient (S8)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "S8 package (8-lead plastic SO)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Case (S8)",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 39,
          "max": null,
          "conditions": "S8 package (8-lead plastic SO)",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ltc2851is8#trpbf"
  ],
  "discovery_pitch": "LTC2851IS8#TRPBF (Analog Devices) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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