SE555P

{
  "schema_version": 1,
  "type": "component",
  "slug": "se555p",
  "title": "SE555P",
  "brief": "Texas Instruments Timers / Clock Oscillators, PDIP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rtc",
    "se555p"
  ],
  "component": {
    "mpn": "SE555P",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "RTC",
    "subcategory": "Timers / Clock Oscillators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2302212109_Texas-Instruments-SE555P_C2879003.pdf",
    "parts": {
      "symbol": "se555p.kicad_sym",
      "footprint": "se555p.kicad_mod",
      "model_3d": "se555p-etched.glb",
      "model_3d_plain": "se555p.glb",
      "model_3d_step": "se555p-etched.step",
      "model_3d_step_plain": "se555p.step",
      "lbr": "se555p.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device. All voltages are measured with respect to this pin."
      },
      {
        "number": "2",
        "name": "TRIG",
        "type": "input",
        "description": "Trigger input. The output goes high and the timing interval starts when this input falls below 1/3 VCC (the trigger threshold)."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "output",
        "description": "Timer output. Drives high (near VCC) during the timing interval and low (near GND) otherwise. Can source or sink up to 200 mA."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Active-low reset. When pulled below ~0.7 V, forces the output low and resets the timing cycle. Tie to VCC when unused."
      },
      {
        "number": "5",
        "name": "CONT",
        "type": "input",
        "description": "Control voltage. Provides access to the internal 2/3 VCC reference; an external voltage or bypass capacitor (typ. 10 nF to GND) can alter timing or reject noise."
      },
      {
        "number": "6",
        "name": "THRES",
        "type": "input",
        "description": "Threshold input. The timing interval ends when the voltage on this pin rises above 2/3 VCC (or the CONT voltage)."
      },
      {
        "number": "7",
        "name": "DISCH",
        "type": "output",
        "description": "Discharge. Open-collector output that goes low to discharge the external timing capacitor at the end of each timing interval."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. Operating range 4.5 V to 18 V for the SE555."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2302212109_Texas-Instruments-SE555P_C2879003.pdf",
        "pages": 37,
        "sha256": "a3c494d783f9c61f",
        "source_tier": "lcsc"
      },
      "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": "se555p.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "se555p-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "87aca08603fe62c453a9898edbf5ee45f3c091df51e61fa0a511a82d6b78aa58",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-8",
      "Category": "RTC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "se555p"
  ],
  "discovery_pitch": "SE555P (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "se555p.kicad_sym",
    "se555p.kicad_mod",
    "se555p.glb",
    "se555p.step",
    "se555p-etched.step",
    "se555p.lbr",
    "docs/hero.png",
    "docs/se555p-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SE555PP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T05:41:30.722Z"
}