MC1455BDR2G

{
  "schema_version": 1,
  "type": "component",
  "slug": "mc1455bdr2g",
  "title": "MC1455BDR2G",
  "brief": "onsemi Timers / Clock Oscillators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rtc",
    "mc1455bdr2g"
  ],
  "component": {
    "mpn": "MC1455BDR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "RTC",
    "subcategory": "Timers / Clock Oscillators",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc1455b-d.pdf",
    "parts": {
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      "footprint": "mc1455bdr2g.kicad_mod",
      "model_3d": "mc1455bdr2g-etched.glb",
      "model_3d_plain": "mc1455bdr2g.glb",
      "model_3d_step": "mc1455bdr2g-etched.step",
      "model_3d_step_plain": "mc1455bdr2g.step",
      "lbr": "mc1455bdr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C7575"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device."
      },
      {
        "number": "2",
        "name": "Trigger",
        "type": "input",
        "description": "Trigger input. A negative pulse below 1/3 VCC on this pin starts the timing cycle by setting the internal flip-flop and driving the Output high."
      },
      {
        "number": "3",
        "name": "Output",
        "type": "output",
        "description": "Push-pull output. Swings between approximately 0 V and VCC and can source or sink up to 200 mA to drive loads directly."
      },
      {
        "number": "4",
        "name": "Reset",
        "type": "input",
        "description": "Active-low reset. Pulling this pin below ~0.7 V forces the Output low and discharges the timing capacitor regardless of the trigger/threshold state. Tie to VCC when unused."
      },
      {
        "number": "5",
        "name": "Control Voltage",
        "type": "input",
        "description": "Control voltage. Directly accesses the 2/3 VCC internal reference node, allowing external modulation of the timing threshold. Typically bypassed to ground with a 10 nF capacitor when not used."
      },
      {
        "number": "6",
        "name": "Threshold",
        "type": "input",
        "description": "Threshold input. When the voltage on this pin rises above 2/3 VCC, the internal flip-flop is reset, driving the Output low and turning on the discharge transistor."
      },
      {
        "number": "7",
        "name": "Discharge",
        "type": "output",
        "description": "Open-collector discharge output. Connects to the collector of an internal NPN transistor whose emitter is at GND; used to discharge the external timing capacitor during the reset phase of the timing cycle."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, 4.5 V to 16 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc1455b-d.pdf",
        "pages": 11,
        "sha256": "26fe4119fe552966",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
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        "file": "mc1455bdr2g.step",
        "role": "plain",
        "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": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mc1455bdr2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "574334d8af3050f8b814a78b42d3efb6c476a3417b938636eab57e5ab7226305",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-8",
      "Category": "RTC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mc1455bdr2g"
  ],
  "discovery_pitch": "MC1455BDR2G (onsemi) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mc1455bdr2g.kicad_sym",
    "mc1455bdr2g.kicad_mod",
    "mc1455bdr2g.glb",
    "mc1455bdr2g.step",
    "mc1455bdr2g-etched.step",
    "mc1455bdr2g.lbr",
    "docs/hero.png",
    "docs/mc1455bdr2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "MC1455BDR2G",
      "kind": "packaging"
    },
    {
      "mpn": "MC1455BDG",
      "kind": "unknown"
    },
    {
      "mpn": "MC1455BPG",
      "kind": "unknown"
    },
    {
      "mpn": "MC1455BP1G",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-28T18:44:11.391Z"
}