RS121XF

{
  "schema_version": 1,
  "type": "component",
  "slug": "rs121xf",
  "title": "RS121XF",
  "brief": "Jiangsu RUNIC Tech Operational Amplifier, SOT-23-5. 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",
    "rs121xf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "RS121XF",
    "manufacturer": "Jiangsu RUNIC Tech",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Amplifiers/Comparators",
    "subcategory": "Operational Amplifier",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588902218330755072",
    "parts": {
      "symbol": "rs121xf.kicad_sym",
      "footprint": "rs121xf.kicad_mod",
      "model_3d": "rs121xf-hero.glb",
      "model_3d_plain": "rs121xf.glb",
      "model_3d_step": "rs121xf-etched.step",
      "model_3d_step_plain": "rs121xf.step",
      "lbr": "rs121xf.lbr"
    },
    "distributor_links": {
      "lcsc": "C237029"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T23:42:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 514 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "output",
        "description": "Amplifier output, rail-to-rail, with the short-circuit output current specified at 25 mA."
      },
      {
        "number": "2",
        "name": "V-",
        "type": "power_in",
        "description": "Negative supply rail; the part operates from 2.5 V to 5.5 V across V+ to V-, and the absolute maximum V+ to V- is 7.0 V."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting input; common-mode range is -0.1 V to 5.6 V with Vs = 5.5 V, and inputs are diode-clamped to the rails, so signals more than 0.5 V beyond the rails must be limited to 10 mA."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input with the same limits as +IN: common-mode range -0.1 V to 5.6 V at Vs = 5.5 V, and input current limited to 10 mA when swinging more than 0.5 V beyond the rails."
      },
      {
        "number": "5",
        "name": "V+",
        "type": "power_in",
        "description": "Positive supply rail; the part operates from 2.5 V to 5.5 V, and the absolute maximum V+ to V- is 7.0 V."
      }
    ],
    "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: Pin numbers and names were read from the SOT23-5 pin-configuration drawin on page 1, whose text extr; Page 1 also shows a separate SOT23-5 pinout labelled RS121B (+IN, V-, -IN, OUT, V+ order). That vari; The schema has no spec field, so the headline supply range (2.5 V to 5.5 V, page 3) appears only ins"
        ],
        "pages_sent": 14,
        "cost_usd": 0.056,
        "at": "2026-10-09T23:40:22"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588902218330755072",
        "pages": 14,
        "sha256": "9418922fc6c089ef",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "rs121xf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "rs121xf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e896d07afc1af528831d7cfcd39cc2fe0bb280387145078065e1c05d041593c4",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Jiangsu RUNIC Tech",
      "Package": "SOT-23-5",
      "Category": "Amplifiers/Comparators",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "9418922fc6c089ef",
      "rows": [
        {
          "name": "Operating Voltage Range",
          "symbol": "Vs",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 5.5,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Offset Voltage",
          "symbol": "Vos",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 0.8,
          "max": 5,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current",
          "symbol": "IB",
          "kind": "electrical",
          "unit": "pA",
          "min": null,
          "typ": 1,
          "max": 10,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Offset Current",
          "symbol": "Ios",
          "kind": "electrical",
          "unit": "pA",
          "min": null,
          "typ": 1,
          "max": 10,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Common-Mode Voltage Range",
          "symbol": "Vcm",
          "kind": "electrical",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 5.6,
          "conditions": "Vs=5.5V, 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Swing From Rail",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "RL = 2KΩ, 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Short-Circuit Current",
          "symbol": "Iout",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Slew Rate",
          "symbol": "SR",
          "kind": "electrical",
          "unit": "V/us",
          "min": null,
          "typ": 0.05,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Gain-Bandwidth Product",
          "symbol": "GBP",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 0.15,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input-Referred Voltage Noise",
          "symbol": "en",
          "kind": "electrical",
          "unit": "nV/√Hz",
          "min": null,
          "typ": 77,
          "max": null,
          "conditions": "f = 1 kHz, 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input-Referred Voltage Noise",
          "symbol": "en",
          "kind": "electrical",
          "unit": "nV/√Hz",
          "min": null,
          "typ": 39,
          "max": null,
          "conditions": "f = 10 kHz, 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current/Amplifier",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 12,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Current in Shutdown",
          "symbol": "IQ(OFF)",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Turn-off time",
          "symbol": "tOFF",
          "kind": "electrical",
          "unit": "us",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Turn-on time",
          "symbol": "tON",
          "kind": "electrical",
          "unit": "us",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shut Down logic-low threshold",
          "symbol": "VL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "Shut Down, 25°C; referenced to (V-)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Amplifier Is Active logic-high threshold",
          "symbol": "VH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "Amplifier Is Active, 25°C; referenced to (V-)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Terminals Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "Input terminals; upper limit printed as (V+)+0.5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Terminals Current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance (junction-to-ambient)",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "SOT23-5, SOT23-6; TA = +25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Temperature range per ordering information",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "rs121xf"
  ],
  "discovery_pitch": "RS121XF (Jiangsu RUNIC Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "files": [
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    "rs121xf.lbr",
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  "visibility": {
    "public": true
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}