BD37A41FVM-TR

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  "slug": "bd37a41fvm-tr",
  "title": "BD37A41FVM-TR",
  "brief": "ROHM Semicon Monitors & Reset Circuits, 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",
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  "component": {
    "mpn": "BD37A41FVM-TR",
    "manufacturer": "ROHM Semicon",
    "package": "MSOP-8-2.8mm",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "Monitors & Reset Circuits",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/777d76f0a7e2f5894b225336bb928a23.pdf",
    "parts": {
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      "lbr": "bd37a41fvm-tr.lbr"
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    "distributor_links": {
      "lcsc": "C2067104",
      "digikey": "BD37A41FVMTR-ND",
      "mouser": "755-BD37A41FVM-TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T02:10:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BD37A41FVMTR-ND",
        "status": "found",
        "lifecycle": "Obsolete"
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      "mouser": {
        "pn": "755-BD37A41FVM-TR",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLK",
        "type": "input",
        "description": "Clock input from the microcontroller; detected on a positive edge with a minimum pulse width of 500 ns, a high threshold of VDD×0.8 (min) and a low threshold of VDD×0.3 (max), and it must not be left open."
      },
      {
        "number": "2",
        "name": "CT",
        "type": "passive",
        "description": "Reset delay time setting capacitor connection; the external capacitor ranges from 470 pF to 3.3 µF and sets the RESET delay as tPLH = 0.69 × Rrst (10 MΩ typ) × CCT."
      },
      {
        "number": "3",
        "name": "CTW",
        "type": "passive",
        "description": "WDT time setting capacitor connection; a capacitor must be connected, ranging from 0.001 µF to 10 µF, to set the watchdog monitor and reset times."
      },
      {
        "number": "4",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin; RESET operates from 1.0 V to 10 V and WDT from 2.5 V to 10 V, with absolute maximum −0.3 V to 10 V."
      },
      {
        "number": "5",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Labelled NC pin in the pin description table; the datasheet specifies no function or connection for it."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; no pin may be held at a voltage below the ground pin at any time, including transients."
      },
      {
        "number": "7",
        "name": "INH",
        "type": "input",
        "description": "WDT ON/OFF setting pin; for BD37Axx, INH high turns the watchdog timer on and low turns it off, with VINHH min VDD×0.8 and VINHL max VDD×0.3, and it must not be left open."
      },
      {
        "number": "8",
        "name": "RESET",
        "type": "output",
        "description": "Reset output pin with N-channel open-drain output; minimum output current capacity is 0.7 mA at VDD = 1.2 V and VDS = 0.5 V, and maximum output leakage is 1 µA at VDD = VDS = 10 V."
      }
    ],
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        "pages": 18,
        "sha256": "ee2f58db3fd89aec",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
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  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "MSOP-8-2.8mm",
      "Category": "Power Management ICs",
      "Pins": "8"
    },
    "characteristics": {
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          "name": "RESET Power Supply Voltage",
          "symbol": "VDD RESET",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": 10,
          "conditions": "Ta = −40°C to 105°C",
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        {
          "name": "WDT Power Supply Voltage",
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          "min": -40,
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        {
          "name": "Storage Temperature",
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          "min": -55,
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        {
          "name": "Maximum Junction Temperature",
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          "name": "Power Dissipation (MSOP8)",
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          "unit": "W",
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          "conditions": "MSOP8, reduced by 4.70 mW/°C over 25°C, glass epoxy board 70 mm × 70 mm × 1.6 mm",
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        },
        {
          "name": "Total Supply Current 1 (during WDT operation)",
          "symbol": "IDD1",
          "kind": "electrical",
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          "max": 14,
          "conditions": "INH : WDT ON Logic Input CTW = 0.1µF",
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          "name": "Total Supply Current 2 (when WDT stopped)",
          "symbol": "IDD2",
          "kind": "electrical",
          "unit": "µA",
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          "typ": 5,
          "max": 14,
          "conditions": "INH : WDT OFF Logic Input",
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        {
          "name": "Output Leak Current",
          "symbol": "Ileak",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDD = VDS = 10V",
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        },
        {
          "name": "Output Current Capacity",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.7,
          "typ": null,
          "max": null,
          "conditions": "VDD = 1.2V, VDS = 0.5V",
          "source_page": 3,
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        },
        {
          "name": "Detection Voltage 1 (4.1V Detect)",
          "symbol": "VDET1",
          "kind": "electrical",
          "unit": "V",
          "min": 4.039,
          "typ": 4.1,
          "max": 4.162,
          "conditions": "Ta = 25°C",
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        {
          "name": "Detection Voltage 2 (4.1V Detect)",
          "symbol": "VDET2",
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          "max": 4.202,
          "conditions": "Ta = −40°C to 105°C",
          "source_page": 3,
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        },
        {
          "name": "RESET Transmission Delay Time: Low to High",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ms",
          "min": 3.9,
          "typ": 6.9,
          "max": 10.1,
          "conditions": "CCT = 0.001µF *1; When VDD = VDET 0.5V",
          "source_page": 4,
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        },
        {
          "name": "Delay Circuit Resistance",
          "symbol": "Rrst",
          "kind": "electrical",
          "unit": "MΩ",
          "min": 5.8,
          "typ": 10,
          "max": 14.5,
          "conditions": "VCT = GND",
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        {
          "name": "Delay Pin Output Current",
          "symbol": "ICT",
          "kind": "electrical",
          "unit": "µA",
          "min": 150,
          "typ": null,
          "max": null,
          "conditions": "VDD = 1.50V, VCT = 0.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Min Operating Voltage",
          "symbol": "VOPL",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": null,
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          "conditions": "VOL ≤ 0.4V, RL = 470KΩ",
          "source_page": 4,
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        {
          "name": "WDT Monitor Time",
          "symbol": "twH",
          "kind": "timing",
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          "conditions": "CCTW = 0.01µF *2",
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        {
          "name": "WDT Reset Time",
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          "kind": "timing",
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          "min": 2.4,
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        {
          "name": "Clock Input Pulse Width",
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        {
          "name": "CTW Charge Current",
          "symbol": "ICTWC",
          "kind": "electrical",
          "unit": "µA",
          "min": 0.25,
          "typ": 0.5,
          "max": 0.75,
          "conditions": "VCTW = 0.2V",
          "source_page": 4,
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        {
          "name": "CTW Discharge Current",
          "symbol": "ICTWO",
          "kind": "electrical",
          "unit": "µA",
          "min": 0.75,
          "typ": 1.5,
          "max": 2,
          "conditions": "VCTW = 0.8V",
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          "name": "Thermal Resistance, junction to ambient (MSOP8)",
          "symbol": "ja",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 212.8,
          "max": null,
          "conditions": "MSOP8, mounted on glass epoxy board 70 mm × 70 mm × 1.6 mm",
          "source_page": 9,
          "source": "datasheet"
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