SN74LS122N

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74ls122n",
  "title": "SN74LS122N",
  "brief": "Texas Instruments Monostable Multivibrators, PDIP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic ics",
    "sn74ls122n",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN74LS122N",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-14",
    "pin_count": 14,
    "category": "Logic ICs",
    "subcategory": "Monostable Multivibrators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ls122n.pdf",
    "parts": {
      "symbol": "sn74ls122n.kicad_sym",
      "footprint": "sn74ls122n.kicad_mod",
      "model_3d": "sn74ls122n-hero.glb",
      "model_3d_plain": "sn74ls122n-etched.glb",
      "model_3d_step": "sn74ls122n-etched.step",
      "model_3d_step_plain": "sn74ls122n.step",
      "lbr": "sn74ls122n.lbr"
    },
    "distributor_links": {
      "lcsc": "C1522780",
      "digikey": "2156-SN74LS122N-ND",
      "mouser": "595-SN74LS122N"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T12:28:17Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74LS122N-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74LS122N",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A1",
        "type": "input",
        "description": "Active-low gated trigger input A1; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states."
      },
      {
        "number": "2",
        "name": "A2",
        "type": "input",
        "description": "Active-low gated trigger input A2; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states."
      },
      {
        "number": "3",
        "name": "B1",
        "type": "input",
        "description": "Active-high gated trigger input B1 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns."
      },
      {
        "number": "4",
        "name": "B2",
        "type": "input",
        "description": "Active-high gated trigger input B2 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns."
      },
      {
        "number": "5",
        "name": "CLR",
        "type": "input",
        "description": "Active-low overriding clear input that terminates the output pulse."
      },
      {
        "number": "6",
        "name": "Q̅",
        "type": "output",
        "description": "Complementary (active-low) output of the monostable multivibrator."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "8",
        "name": "Q",
        "type": "output",
        "description": "True (active-high) pulse output of the monostable multivibrator."
      },
      {
        "number": "9",
        "name": "Rint",
        "type": "passive",
        "description": "Internal timing resistor (nominally 10 kΩ); connect to VCC to use it."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "11",
        "name": "Cext",
        "type": "passive",
        "description": "External timing capacitor connection; the capacitor goes between Cext and Rext/Cext (positive)."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "13",
        "name": "Rext/Cext",
        "type": "passive",
        "description": "External timing resistor and capacitor connection (capacitor positive side); an external resistor goes to VCC with Rint open-circuited."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The page 1 pin diagram has no voltage values, so the VCC description gives no supply range. The supp",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 31,
        "cost_usd": 0.3825,
        "at": "2026-10-23T12:27:56"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74ls122n.pdf",
        "pages": 31,
        "sha256": "3b63fa652f19f07e",
        "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": [
      {
        "file": "sn74ls122n.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,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3dae072a95c64bee0d1e58be8e75383639f5017ab982de1749d05808a4eed058",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ls122n-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,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2c5bec283312aba6dd39023bda405d0c6b2db4faaa66f7be91281e56e0dcacd1",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-14",
      "Category": "Logic ICs",
      "Pins": "14"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74ls122n"
  ],
  "discovery_pitch": "SN74LS122N (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74ls122n.kicad_sym",
    "sn74ls122n.kicad_mod",
    "sn74ls122n.glb",
    "sn74ls122n.step",
    "sn74ls122n.lbr",
    "docs/hero.png",
    "docs/sn74ls122n-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74ls122n-hero.glb",
    "sn74ls122n-hero.overlay.json",
    "sn74ls122n-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}