main
Ray Set visibility: public a0d9cfe 10d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bd9555fvm-cgtr",
  "title": "BD9555FVM-CGTR",
  "brief": "ROHM Semicon Timers / Counters, MSOP-8-2.8mm. 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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    "clock-timing",
    "bd9555fvm-cgtr",
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  "component": {
    "mpn": "BD9555FVM-CGTR",
    "manufacturer": "ROHM Semicon",
    "package": "MSOP-8-2.8mm",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Timers / Counters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590150517440741376",
    "parts": {
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      "lbr": "bd9555fvm-cgtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2651392",
      "digikey": "BD9555FVM-CGTR-ND",
      "mouser": "755-BD9555FVM-CGTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:53:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BD9555FVM-CGTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "755-BD9555FVM-CGTR",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Power supply input, with a recommended operating range of 4.5 V to 42 V and an absolute maximum rating of -0.3 V to +50 V."
      },
      {
        "number": "2",
        "name": "DCENB",
        "type": "input",
        "description": "Enable input: a low level (VIL_DCENB max 3.6 V) fixes OUT at high, and a high level (VIH_DCENB min 4.4 V, up to VIN + 0.2 V) starts the PWM output."
      },
      {
        "number": "3",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Marked N.C. (no connection) in the pin table; the datasheet gives no function for this pin."
      },
      {
        "number": "4",
        "name": "OUT",
        "type": "output",
        "description": "PWM output that swings to VOH min 11.0 V at IOH = -10 mA and to VOL max 3.8 V at IOL = 50 mA, with an absolute maximum output current of 70 mA."
      },
      {
        "number": "5",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Marked N.C. (no connection) in the pin table; the datasheet gives no function for this pin."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the IC."
      },
      {
        "number": "7",
        "name": "CRT",
        "type": "passive",
        "description": "CR timing connection for the external capacitor CCRT and resistor RCRT, which sets the ramp between the 1.1 V (typ) charge-on and 3.0 V (typ) discharge-on thresholds."
      },
      {
        "number": "8",
        "name": "DISC",
        "type": "passive",
        "description": "Discharge setting pin that sets the discharge path with a typical discharge resistance RD of 50 Ω."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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 datasheet gives no KiCad electrical type for CRT or DISC; 'passive' is an inferred classificatio; N.C. pins are listed with no function beyond the label N.C.; type 'unconnected' is taken from the la; Pin descriptions use limits and functions stated in the Pin table, Electrical Characteristics and Ab"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0621,
        "at": "2026-10-18T03:51:43"
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        "sha256": "8ef2e509472f042f",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
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        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-18",
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  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "MSOP-8-2.8mm",
      "Category": "Clock/Timing",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8ef2e509472f042fc2b385d6fa54a7c6402d228ebf1ecdbe9bfee7e34450bd76",
      "rows": [
        {
          "name": "Circuit Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1,
          "max": 3,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "CRT Terminal Charge Current",
          "symbol": "ICRT_SO",
          "kind": "electrical",
          "unit": "µA",
          "min": 29.75,
          "typ": 35,
          "max": 40.25,
          "conditions": "VCRT=0.9V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CRT Terminal Charge ON Voltage",
          "symbol": "VCRT_CHA",
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          "unit": "V",
          "min": 0.99,
          "typ": 1.1,
          "max": 1.21,
          "conditions": "",
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        {
          "name": "CRT Terminal Discharge ON Voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 3,
          "max": 3.3,
          "conditions": "",
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        },
        {
          "name": "CRT Terminal Charge Resistance",
          "symbol": "RCHA",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 51.6,
          "typ": 54.3,
          "max": 57,
          "conditions": "RCHA = (VCRT_DIS - VCRT_CHA) / ICRT_SO",
          "source_page": 3,
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        {
          "name": "DISC Terminal Discharge Resistance",
          "symbol": "RD",
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          "min": null,
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          "max": 100,
          "conditions": "VCRT=3.4V",
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        },
        {
          "name": "DCENB Terminal \"H\" Input Voltage",
          "symbol": "VIH_DCENB",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": null,
          "max": null,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "DCENB Terminal \"L\" Input Voltage",
          "symbol": "VIL_DCENB",
          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "max": 3.6,
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        },
        {
          "name": "\"H\" Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 11,
          "typ": 12.3,
          "max": null,
          "conditions": "IOH=-10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "\"L\" Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.28,
          "max": 3.8,
          "conditions": "IOL=50mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Voltage (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Output Current",
          "symbol": "Io",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.38,
          "conditions": "Pd deleted at 3.8mW/°C at temperatures above Ta=25°C (Note1)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range (absolute maximum)",
          "symbol": "Topr",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Junction Temperature",
          "symbol": "Tjmax",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
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        },
        {
          "name": "Power Supply Voltage (recommended)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 42,
          "conditions": "",
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        {
          "name": "Operating Temperature Range (recommended)",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "CR Timer Frequency Range",
          "symbol": "FPWM",
          "kind": "recommended_operating",
          "unit": "Hz",
          "min": 1,
          "typ": null,
          "max": 10000,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PWM Minimum Pulse Width",
          "symbol": "TMIN",
          "kind": "recommended_operating",
          "unit": "µs",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Input Capacitor",
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          "kind": "recommended_operating",
          "unit": "µF",
          "min": 0.1,
          "typ": null,
          "max": null,
          "conditions": "Ceramic capacitor recommended",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CRT Terminal Capacitor",
          "symbol": "CCRT",
          "kind": "recommended_operating",
          "unit": "pF",
          "min": 19,
          "typ": null,
          "max": 18,
          "conditions": "Ceramic capacitor recommended",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CRT Terminal Resistor",
          "symbol": "RCRT",
          "kind": "recommended_operating",
          "unit": "Ω",
          "min": 500,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
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