IS31FL3733-QFLS4-TR

{
  "slug": "is31fl3733-qfls4-tr",
  "version": "0.1.0",
  "type": "component",
  "description": "ISSI Integrated Silicon Solution LED Drivers, QFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "led drivers",
    "is31fl3733-qfls4-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "is31fl3733-qfls4-tr.kicad_sym",
    "is31fl3733-qfls4-tr.kicad_mod",
    "is31fl3733-qfls4-tr.glb",
    "is31fl3733-qfls4-tr.step",
    "is31fl3733-qfls4-tr.lbr",
    "docs/hero.png",
    "docs/is31fl3733-qfls4-tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "is31fl3733-qfls4-tr-hero.glb",
    "is31fl3733-qfls4-tr-hero.overlay.json"
  ],
  "component": {
    "mpn": "IS31FL3733-QFLS4-TR",
    "manufacturer": "ISSI Integrated Silicon Solution",
    "package": "QFN-48-EP(6x6)",
    "pin_count": 49,
    "category": "LED Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590174314994831360",
    "parts": {
      "symbol": "is31fl3733-qfls4-tr.kicad_sym",
      "footprint": "is31fl3733-qfls4-tr.kicad_mod",
      "model_3d": "is31fl3733-qfls4-tr-hero.glb",
      "model_3d_plain": "is31fl3733-qfls4-tr.glb",
      "model_3d_step": "is31fl3733-qfls4-tr-etched.step",
      "model_3d_step_plain": "is31fl3733-qfls4-tr.step",
      "lbr": "is31fl3733-qfls4-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C506251",
      "mouser": "870-31FL3733QFLS4TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T19:18:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "870-31FL3733QFLS4TR",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected internally."
      },
      {
        "number": "2",
        "name": "SW1",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW1)."
      },
      {
        "number": "3",
        "name": "SW2",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW2)."
      },
      {
        "number": "4",
        "name": "SW3",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW3)."
      },
      {
        "number": "5",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground."
      },
      {
        "number": "6",
        "name": "SW4",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW4)."
      },
      {
        "number": "7",
        "name": "SW5",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW5)."
      },
      {
        "number": "8",
        "name": "SW6",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW6)."
      },
      {
        "number": "9",
        "name": "SW7",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW7)."
      },
      {
        "number": "10",
        "name": "SW8",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW8)."
      },
      {
        "number": "11",
        "name": "SW9",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW9)."
      },
      {
        "number": "12",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground."
      },
      {
        "number": "13",
        "name": "SW10",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW10)."
      },
      {
        "number": "14",
        "name": "SW11",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW11)."
      },
      {
        "number": "15",
        "name": "SW12",
        "type": "output",
        "description": "Switch pin for LED matrix scanning (column SW12)."
      },
      {
        "number": "16",
        "name": "CS1",
        "type": "output",
        "description": "Current source output for row control (CS1)."
      },
      {
        "number": "17",
        "name": "CS2",
        "type": "output",
        "description": "Current source output for row control (CS2)."
      },
      {
        "number": "18",
        "name": "CS3",
        "type": "output",
        "description": "Current source output for row control (CS3)."
      },
      {
        "number": "19",
        "name": "CS4",
        "type": "output",
        "description": "Current source output for row control (CS4)."
      },
      {
        "number": "20",
        "name": "PVCC",
        "type": "power_in",
        "description": "Power supply for the current sources."
      },
      {
        "number": "21",
        "name": "CS5",
        "type": "output",
        "description": "Current source output for row control (CS5)."
      },
      {
        "number": "22",
        "name": "CS6",
        "type": "output",
        "description": "Current source output for row control (CS6)."
      },
      {
        "number": "23",
        "name": "CS7",
        "type": "output",
        "description": "Current source output for row control (CS7)."
      },
      {
        "number": "24",
        "name": "CS8",
        "type": "output",
        "description": "Current source output for row control (CS8)."
      },
      {
        "number": "25",
        "name": "CS9",
        "type": "output",
        "description": "Current source output for row control (CS9)."
      },
      {
        "number": "26",
        "name": "CS10",
        "type": "output",
        "description": "Current source output for row control (CS10)."
      },
      {
        "number": "27",
        "name": "CS11",
        "type": "output",
        "description": "Current source output for row control (CS11)."
      },
      {
        "number": "28",
        "name": "CS12",
        "type": "output",
        "description": "Current source output for row control (CS12)."
      },
      {
        "number": "29",
        "name": "PVCC",
        "type": "power_in",
        "description": "Power supply for the current sources."
      },
      {
        "number": "30",
        "name": "CS13",
        "type": "output",
        "description": "Current source output for row control (CS13)."
      },
      {
        "number": "31",
        "name": "CS14",
        "type": "output",
        "description": "Current source output for row control (CS14)."
      },
      {
        "number": "32",
        "name": "CS15",
        "type": "output",
        "description": "Current source output for row control (CS15)."
      },
      {
        "number": "33",
        "name": "CS16",
        "type": "output",
        "description": "Current source output for row control (CS16)."
      },
      {
        "number": "34",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "35",
        "name": "R_EXT",
        "type": "passive",
        "description": "Input terminal for an external resistor that sets the current source DC current value."
      },
      {
        "number": "36",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected internally."
      },
      {
        "number": "37",
        "name": "AVCC",
        "type": "power_in",
        "description": "Power supply for analog circuits."
      },
      {
        "number": "38",
        "name": "DVCC",
        "type": "power_in",
        "description": "Power supply for digital circuits."
      },
      {
        "number": "39",
        "name": "VIO",
        "type": "power_in",
        "description": "Input logic reference voltage."
      },
      {
        "number": "40",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Synchronization pin for multi-part operation; leave floating if not used."
      },
      {
        "number": "41",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C-compatible serial data."
      },
      {
        "number": "42",
        "name": "SCL",
        "type": "input",
        "description": "I2C-compatible serial clock."
      },
      {
        "number": "43",
        "name": "ADDR1",
        "type": "input",
        "description": "I2C address setting."
      },
      {
        "number": "44",
        "name": "ADDR2",
        "type": "input",
        "description": "I2C address setting."
      },
      {
        "number": "45",
        "name": "INTB",
        "type": "output",
        "description": "Interrupt output, active low when an interrupt event occurs; may be left floating if the interrupt function is not used."
      },
      {
        "number": "46",
        "name": "SDB",
        "type": "input",
        "description": "Shuts down the chip when pulled low."
      },
      {
        "number": "47",
        "name": "IICRST",
        "type": "input",
        "description": "Resets the I2C interface when pulled high; must be pulled low during normal operation."
      },
      {
        "number": "48",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; connect to GND."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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-description table gives the SW pins as LED matrix scan switch pins but does not state a dire; The pin-description table (page 4) does not name the package it applies to. Its numbering matches th; The exposed thermal pad is not given a pin number in the datasheet. The text only says it 'Need to c",
          "exposed pad 49 added from the footprint"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0847,
        "at": "2026-10-09T19:14:16"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590174314994831360",
        "pages": 31,
        "sha256": "536d20da9f0b86c9",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "is31fl3733-qfls4-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.02,
          6.02,
          0.9
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "16c9ffab88fc1e055dccbf97683ecb8dc1f0f84cf546f1893e53b7ce4d3e64ef",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "is31fl3733-qfls4-tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.02,
          6.02,
          0.9
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ad56f087b7ee5e971d7e24c880d89c425f2aabf9188be2ea5e1b5492be78b110",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}