SN74LS122DR

{
  "slug": "sn74ls122dr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Monostable Multivibrators, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74ls122dr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74ls122dr.kicad_sym",
    "sn74ls122dr.kicad_mod",
    "sn74ls122dr.glb",
    "sn74ls122dr.step",
    "sn74ls122dr.lbr",
    "docs/hero.png",
    "docs/sn74ls122dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74ls122dr-hero.glb",
    "sn74ls122dr-hero.overlay.json"
  ],
  "component": {
    "mpn": "SN74LS122DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Monostable Multivibrators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ls122.pdf",
    "parts": {
      "symbol": "sn74ls122dr.kicad_sym",
      "footprint": "sn74ls122dr.kicad_mod",
      "model_3d": "sn74ls122dr-hero.glb",
      "model_3d_plain": "sn74ls122dr.glb",
      "model_3d_step": "sn74ls122dr-etched.step",
      "model_3d_step_plain": "sn74ls122dr.step",
      "lbr": "sn74ls122dr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2652492",
      "digikey": "296-29004-2-ND",
      "mouser": "595-SN74LS122DR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T19:04:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-29004-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74LS122DR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A1",
        "type": "input",
        "description": "Gated active-low trigger input A1; the multivibrator triggers on a falling edge when the other inputs are in their enabling states."
      },
      {
        "number": "2",
        "name": "A2",
        "type": "input",
        "description": "Gated active-low trigger input A2; the multivibrator triggers on a falling edge when the other inputs are in their enabling states."
      },
      {
        "number": "3",
        "name": "B1",
        "type": "input",
        "description": "Gated active-high trigger input B1 with Schmitt hysteresis; the multivibrator triggers on a rising edge."
      },
      {
        "number": "4",
        "name": "B2",
        "type": "input",
        "description": "Gated active-high trigger input B2 with Schmitt hysteresis; the multivibrator triggers on a rising edge."
      },
      {
        "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."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "8",
        "name": "Q",
        "type": "output",
        "description": "True (active-high) output of the monostable."
      },
      {
        "number": "9",
        "name": "Rint",
        "type": "passive",
        "description": "Internal timing resistor (nominally 10 kΩ); connect to VCC to use it, or leave open when using an external resistor."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "11",
        "name": "Cext",
        "type": "passive",
        "description": "External timing capacitor connection; the capacitor is connected 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/capacitor node; the positive side of the timing capacitor connects here, and an external resistor can go to VCC with Rint open."
      },
      {
        "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 pinout comes from the page 1 drawing for the SN74LS122 D or N package, which is 14 pins. The SOI",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 32,
        "cost_usd": 0.3958,
        "at": "2026-10-11T19:04:35"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74ls122.pdf",
        "pages": 32,
        "sha256": "0b96374289001205",
        "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": "sn74ls122dr.step",
        "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": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ls122dr-etched.step",
        "role": "eda",
        "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": "c22b0a84c1e4be925fcff6b2ed223c76bfe396af5ffdf2de5affbf3128950102",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}