THS4121CD

{
  "schema_version": 1,
  "type": "component",
  "slug": "ths4121cd",
  "title": "THS4121CD",
  "brief": "Texas Instruments Differential Amplifiers, SOIC-8. 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",
    "amplifiers-comparators",
    "ths4121cd",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "THS4121CD",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Differential Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ths4121",
    "parts": {
      "symbol": "ths4121cd.kicad_sym",
      "footprint": "ths4121cd.kicad_mod",
      "model_3d": "ths4121cd-hero.glb",
      "model_3d_plain": "ths4121cd.glb",
      "model_3d_step": "ths4121cd-etched.step",
      "model_3d_step_plain": "ths4121cd.step",
      "lbr": "ths4121cd.lbr"
    },
    "distributor_links": {
      "lcsc": "C524009",
      "digikey": "2156-THS4121CD-ND",
      "mouser": "595-THS4121CD"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T15:13:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-THS4121CD-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-THS4121CD",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN−",
        "type": "power_in",
        "description": "Inverting input of the THS4121 fully differential amplifier; input voltage is limited to ±VDD per the absolute maximum ratings."
      },
      {
        "number": "2",
        "name": "VOCM",
        "type": "input",
        "description": "Output common-mode voltage input that sets VOC; for proper operation, VOCM symmetry must be maintained by using matched feedback and gain resistors (Rf1 = Rf2, Rg1 = Rg2)."
      },
      {
        "number": "3",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply pin; the absolute maximum supply voltage from GND to VDD is 3.6 V, and the datasheet example uses VDD = 3.3 V."
      },
      {
        "number": "4",
        "name": "VOUT+",
        "type": "output",
        "description": "Non-inverting differential output; for capacitive loads above 10 pF, a series output resistor of at least 20 Ω is recommended, and output sink current is limited to 110 mA."
      },
      {
        "number": "5",
        "name": "VOUT−",
        "type": "output",
        "description": "Inverting differential output; for capacitive loads above 10 pF, a series output resistor of at least 20 Ω is recommended."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the amplifier; supply ratings are specified from GND to VDD."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the THS4121; on the THS4120 this same position is the PD power-down pin, which requires an external 10-kΩ pullup to the positive supply."
      },
      {
        "number": "8",
        "name": "VIN+",
        "type": "power_in",
        "description": "Non-inverting input of the THS4121 fully differential amplifier; input voltage is limited to ±VDD per the absolute maximum ratings."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin-to-label pairing was inferred from the text extraction of the TOP VIEW drawing, which lists ; Pin descriptions are limited to what the excerpted pages state. The excerpt does not give a pin func; The THS4121CD SOIC (D) package is confirmed by the package addendum (8 pins, SOIC (D), tube, 0 to 70"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0558,
        "at": "2026-10-11T15:13:41"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ths4121",
        "pages": 37,
        "sha256": "705c359dabda7e27",
        "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": "ths4121cd.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ths4121cd-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "8e43df51d135a0fc2abfc35b2834284931e4005abf93d4aa224d25a55aedbe7e",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Amplifiers/Comparators",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ths4121cd"
  ],
  "discovery_pitch": "THS4121CD (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",
    "ths4121cd.kicad_sym",
    "ths4121cd.kicad_mod",
    "ths4121cd.glb",
    "ths4121cd.step",
    "ths4121cd.lbr",
    "docs/hero.png",
    "docs/ths4121cd-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ths4121cd-hero.glb",
    "ths4121cd-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}