TLC555

{
  "schema_version": 1,
  "type": "component",
  "slug": "tlc555",
  "title": "TLC555",
  "brief": "TI CMOS 555 timer, SOIC-8. Low power, up to 2 MHz, 2-15 V, same pinout as NE555. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "timer",
    "555",
    "cmos",
    "oscillator",
    "soic-8",
    "texas-instruments"
  ],
  "component": {
    "mpn": "TLC555",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Timer",
    "subcategory": "CMOS timer (555)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tlc555.pdf",
    "parts": {
      "symbol": "tlc555.kicad_sym",
      "footprint": "tlc555.kicad_mod",
      "model_3d": "tlc555-etched.glb",
      "model_3d_plain": "tlc555.glb",
      "lbr": "tlc555.lbr",
      "model_3d_step": "tlc555-etched.step",
      "model_3d_step_plain": "tlc555.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for the device."
      },
      {
        "number": "2",
        "name": "TRIG",
        "type": "input",
        "description": "Trigger input. Start of timing input: pulling TRIG below 1/2 CONT (~1/3 VDD) sets the output high and opens the discharge switch."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "output",
        "description": "High-current timer output. Rail-to-rail CMOS output; sinks up to 100 mA and sources up to 10 mA typical."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Active-low reset input. Overrides all other inputs; when low, forces the output low and the discharge switch on to start a new timing cycle. Tie high (to VDD) when unused."
      },
      {
        "number": "5",
        "name": "CONT",
        "type": "input",
        "description": "Control voltage. Sets the comparator thresholds (open-circuit value is 2/3 VDD); allows an external voltage to modulate timing or a bypass capacitor (typically 10 nF) to ground for noise immunity."
      },
      {
        "number": "6",
        "name": "THRES",
        "type": "input",
        "description": "Threshold input. End of timing input: when THRES exceeds CONT (~2/3 VDD) the output goes low and the discharge switch turns on."
      },
      {
        "number": "7",
        "name": "DISCH",
        "type": "output",
        "description": "Discharge. Open-drain (open-collector) output to discharge the external timing capacitor to GND during the low half of the timing cycle."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage. Single-supply operation from 2 V to 15 V (TLC555C); IDD typically 250 uA at VDD = 5 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tlc555.pdf",
        "pages": 47,
        "sha256": "1bb22975b6bc1294",
        "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": "tlc555.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tlc555-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "45bdae5e063f873a1e52744c380d53299b4586681ebd68b932df671c1ff4d76b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "CMOS timer (astable / monostable)",
      "Supply voltage": "2-15 V",
      "Supply current": "~1 mA (low power)",
      "Max frequency": "2.1 MHz",
      "Output": "CMOS push-pull",
      "Compatibility": "pin-identical to NE555",
      "Timing": "external RC on TRIG/THRES",
      "Package": "SOIC-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tlc555",
    "cmos 555",
    "low power 555",
    "555 timer cmos",
    "ne555 cmos"
  ],
  "discovery_pitch": "TLC555 CMOS 555 timer (SOIC-8, low-power) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tlc555.kicad_sym",
    "tlc555.kicad_mod",
    "tlc555.glb",
    "tlc555.lbr",
    "docs/hero.png",
    "docs/tlc555-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tlc555-etched.step"
  ],
  "variants": [
    {
      "mpn": "TLC555CD (SOIC-8, tube)",
      "kind": "packaging"
    },
    {
      "mpn": "TLC555CDR (SOIC-8, tape & reel)",
      "kind": "packaging"
    }
  ]
}