NE556DR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ne556dr",
  "title": "NE556DR",
  "brief": "Texas Instruments Timers / Counters, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "clock-timing",
    "ne556dr"
  ],
  "component": {
    "mpn": "NE556DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Clock/Timing",
    "subcategory": "Timers / Counters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ne556.pdf",
    "parts": {
      "symbol": "ne556dr.kicad_sym",
      "footprint": "ne556dr.kicad_mod",
      "model_3d": "ne556dr-etched.glb",
      "model_3d_plain": "ne556dr.glb",
      "model_3d_step": "ne556dr-etched.step",
      "model_3d_step_plain": "ne556dr.step",
      "lbr": "ne556dr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "1DIS",
        "type": "output",
        "description": "Timer 1 discharge. Open-collector output that discharges the external timing capacitor when the internal flip-flop is set."
      },
      {
        "number": "2",
        "name": "1THRES",
        "type": "input",
        "description": "Timer 1 threshold input. When voltage rises above 2/3 VCC, the internal flip-flop resets and the output goes low."
      },
      {
        "number": "3",
        "name": "1CONT",
        "type": "input",
        "description": "Timer 1 control voltage. Access to the internal 2/3 VCC reference; can be used to modulate output pulse width. Typically bypassed to GND with 10 nF."
      },
      {
        "number": "4",
        "name": "1RESET",
        "type": "input",
        "description": "Timer 1 reset. Active-low; forces output low and discharge on when driven below ~0.7 V. Tie to VCC if unused."
      },
      {
        "number": "5",
        "name": "1OUT",
        "type": "output",
        "description": "Timer 1 output. Push-pull output capable of sourcing/sinking up to 200 mA; swings between near-GND and near-VCC."
      },
      {
        "number": "6",
        "name": "1TRIG",
        "type": "input",
        "description": "Timer 1 trigger. When driven below 1/3 VCC, sets the internal flip-flop and drives the output high."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference (0 V). Common return for both timers."
      },
      {
        "number": "8",
        "name": "2TRIG",
        "type": "input",
        "description": "Timer 2 trigger. When driven below 1/3 VCC, sets the internal flip-flop and drives the output high."
      },
      {
        "number": "9",
        "name": "2OUT",
        "type": "output",
        "description": "Timer 2 output. Push-pull output capable of sourcing/sinking up to 200 mA; swings between near-GND and near-VCC."
      },
      {
        "number": "10",
        "name": "2RESET",
        "type": "input",
        "description": "Timer 2 reset. Active-low; forces output low and discharge on when driven below ~0.7 V. Tie to VCC if unused."
      },
      {
        "number": "11",
        "name": "2CONT",
        "type": "input",
        "description": "Timer 2 control voltage. Access to the internal 2/3 VCC reference; can be used to modulate output pulse width. Typically bypassed to GND with 10 nF."
      },
      {
        "number": "12",
        "name": "2THRES",
        "type": "input",
        "description": "Timer 2 threshold input. When voltage rises above 2/3 VCC, the internal flip-flop resets and the output goes low."
      },
      {
        "number": "13",
        "name": "2DIS",
        "type": "output",
        "description": "Timer 2 discharge. Open-collector output that discharges the external timing capacitor when the internal flip-flop is set."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, 4.5 V to 16 V (NE556). Bypass to GND with 100 nF near the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ne556.pdf",
        "pages": 31,
        "sha256": "63e3e49f1c2acba3",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ne556dr-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": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "587a48cee405792946429f843a34a2f041d9bd06186b24ee19fb08d5bdc966e5",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-14",
      "Category": "Clock/Timing",
      "Pins": "14"
    }
  },
  "variants": [
    {
      "mpn": "NE556DR",
      "kind": "packaging"
    },
    {
      "mpn": "NE556DRD",
      "kind": "packaging"
    },
    {
      "mpn": "NE556DRN",
      "kind": "packaging"
    },
    {
      "mpn": "NE556DRP",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ne556dr"
  ],
  "discovery_pitch": "NE556DR (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",
    "ne556dr.kicad_sym",
    "ne556dr.kicad_mod",
    "ne556dr.glb",
    "ne556dr.step",
    "ne556dr.lbr",
    "docs/hero.png",
    "docs/ne556dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T03:10:54.990Z"
}