UC3842AP-S08-R

{
  "slug": "uc3842ap-s08-r",
  "version": "0.1.0",
  "type": "component",
  "description": "UTC Unisonic Tech AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3842ap-s08-r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc3842ap-s08-r.kicad_sym",
    "uc3842ap-s08-r.kicad_mod",
    "uc3842ap-s08-r.glb",
    "uc3842ap-s08-r.step",
    "uc3842ap-s08-r.lbr",
    "docs/hero.png",
    "docs/uc3842ap-s08-r-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3842ap-s08-r-hero.glb",
    "uc3842ap-s08-r-hero.overlay.json",
    "uc3842ap-s08-r-etched.glb"
  ],
  "component": {
    "mpn": "UC3842AP-S08-R",
    "manufacturer": "UTC Unisonic Tech",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175464393728000",
    "parts": {
      "symbol": "uc3842ap-s08-r.kicad_sym",
      "footprint": "uc3842ap-s08-r.kicad_mod",
      "model_3d": "uc3842ap-s08-r-hero.glb",
      "model_3d_plain": "uc3842ap-s08-r-etched.glb",
      "model_3d_step": "uc3842ap-s08-r-etched.step",
      "model_3d_step_plain": "uc3842ap-s08-r.step",
      "lbr": "uc3842ap-s08-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C71118"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T05:52:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for loop compensation (sink current max 10 mA, source about 0.5 mA); pulling it below two diode drops above ground shuts down the output."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input (feedback voltage, 2.5 V nominal) with an analog input range of -0.3 to +6.3 V."
      },
      {
        "number": "3",
        "name": "Current Sense",
        "type": "input",
        "description": "Current sense comparator input with 1 V maximum trip level (peak current = 1.0 V/Rs) and an analog input range of -0.3 to +6.3 V; raising it above 1 V shuts down the output."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin where the external RT to VREF and CT to ground set the fixed frequency (500 kHz operation max, 52 kHz typical at 10 kΩ/3.3 nF)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; timing and bypass capacitors should be connected close to this pin in a single-point ground."
      },
      {
        "number": "6",
        "name": "Output",
        "type": "output",
        "description": "High-current totem-pole output driving a MOSFET gate directly, with ±1 A peak output current, and high impedance during under-voltage lockout (shunt to GND with a bleeder resistor)."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply with 30 V maximum from a low impedance source (self-limiting for ICC<30 mA), with UVLO start threshold 16 V typ and 10 V typ minimum operating for UC3842A."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "Internally trimmed 5 V reference output (4.9 to 5.1 V at 1 mA) with 100 mA typical short-circuit current."
      }
    ],
    "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 configuration diagram on page 2 is garbled in the text extraction: the labels and numbers ar; The datasheet gives the oscillator amplitude as '1.7 V' under the peak-to-peak condition without a c; The datasheet covers both UC3842A (16 V start / 10 V min operating) and UC3843A (8.4 V start / 7.6 V"
        ],
        "pages_sent": 9,
        "cost_usd": 0.048,
        "at": "2026-10-19T05:50:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175464393728000",
        "pages": 9,
        "sha256": "156578ac13622df2",
        "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"
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        "role": "plain",
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        "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": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc3842ap-s08-r-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": "2130fd5d059e36f278cacea4030332f632f1e9dcd4d1c8b562aade82aad5e83c",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}