FM33LG023A

{
  "schema_version": 1,
  "type": "component",
  "slug": "fm33lg023a",
  "title": "FM33LG023A",
  "brief": "FUDAN MICRO Microcontroller Units (MCUs/MPUs/SOCs), QFN-32(5x5). 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",
    "single chip microcomputer-microcontroller",
    "fm33lg023a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "FM33LG023A",
    "manufacturer": "FUDAN MICRO",
    "package": "QFN-32(5x5)",
    "pin_count": 33,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/76a8ad4a0d656efffe20d60a0802004a.pdf",
    "parts": {
      "symbol": "fm33lg023a.kicad_sym",
      "footprint": "fm33lg023a.kicad_mod",
      "model_3d": "fm33lg023a-hero.glb",
      "model_3d_plain": "fm33lg023a-etched.glb",
      "model_3d_step": "fm33lg023a-etched.step",
      "model_3d_step_plain": "fm33lg023a.step",
      "lbr": "fm33lg023a.lbr"
    },
    "distributor_links": {
      "lcsc": "C5244095"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T22:48:20Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 877 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PD8",
        "type": "bidirectional",
        "description": "GPIO that also serves as UART3_TX and SWIO (SWD data)."
      },
      {
        "number": "2",
        "name": "NRST",
        "type": "input",
        "description": "Reset pin with 5 kΩ typical pull-up, VIL max 0.3VDD, VIH min 0.7VDD."
      },
      {
        "number": "3",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO with UART0_RX, LPUART0_RX and ADC_IN4 functions."
      },
      {
        "number": "4",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO with UART0_TX, LPUART0_TX and ADC_IN11 functions."
      },
      {
        "number": "5",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO with COM6/SEG30 LCD drive, OPA1_INN2 and CAN_RX functions."
      },
      {
        "number": "6",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO with COM7/SEG31 LCD drive, OPA1_INP2 and CAN_TX functions."
      },
      {
        "number": "7",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO with SEG0 LCD, LPT32_CH1, SPI1_SSN and COMP2_INP1 functions."
      },
      {
        "number": "8",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO with SEG1 LCD, LPT32_CH2, SPI1_SCK and COMP2_INP2 functions; the QFN32 figure shows PA11 (SEG32/SCL/LPUART2_RX) sharing this pin."
      },
      {
        "number": "9",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO with SEG34 LCD, UART3_RX, SPI1_MISO and OPA1_OUT3 functions; the QFN32 figure shows PA12 (SEG33/SDA/LPUART2_TX) sharing this pin."
      },
      {
        "number": "10",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Pin with SEG35 LCD, UART3_TX, SPI1_MOSI and OPA1_OUT4 functions."
      },
      {
        "number": "11",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO with SEG3 LCD, ATIM_CH1, LPUART2_RX and COMP3_INN1 functions."
      },
      {
        "number": "12",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO with SEG4 LCD, ATIM_CH2, LPUART2_TX and COMP3_INN2 functions."
      },
      {
        "number": "13",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO with SEG6 LCD, ATIM_CH4, SPI2_SCK and ANATST (factory test) functions; PB8 (SEG7/SPI0_SSN/ATIM_CH3N/COMP1_INP1) shares this pin in the QFN32 figure."
      },
      {
        "number": "14",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO with SEG9 LCD, OPA1_INN1, SPI0_MISO and GPT0_CH1 functions."
      },
      {
        "number": "15",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO with SEG10 LCD, OPA1_INP1, SPI MOSI and GPT0_CH2 functions."
      },
      {
        "number": "16",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO with WKUP3 wake-up, FOUT1 clock output, ATIM_ETR and OPA1_OUT1 functions; PE1 (SEG37/SPI0_SCK) shares this pin in the QFN32 figure."
      },
      {
        "number": "17",
        "name": "PC2",
        "type": "bidirectional",
        "description": "GPIO with XTHIN high-frequency crystal input, UART1_RX and LPUART1_RX; PD12 (VDISP1/SDA/SPI2_MOSI) shares this pin in the QFN32 figure."
      },
      {
        "number": "18",
        "name": "PC3",
        "type": "bidirectional",
        "description": "GPIO with XTHOUT high-frequency crystal output, UART1_TX and LPUART1_TX functions."
      },
      {
        "number": "19",
        "name": "PC5",
        "type": "bidirectional",
        "description": "GPIO with SEG14 LCD, DAC_OUT, COMP2_OUT and UART5_TX functions (ESD HBM rating ±2000 V on DAC_OUT)."
      },
      {
        "number": "20",
        "name": "PC7",
        "type": "bidirectional",
        "description": "GPIO with SEG16 LCD, SPI2_SSN and ADC_IN6 functions."
      },
      {
        "number": "21",
        "name": "PC8",
        "type": "bidirectional",
        "description": "GPIO with SEG17 LCD, SPI2_SCK and ADC_IN13 functions."
      },
      {
        "number": "22",
        "name": "PC9",
        "type": "bidirectional",
        "description": "GPIO with SEG18 LCD, SPI2_MISO and ADC_IN14 functions."
      },
      {
        "number": "23",
        "name": "PC10",
        "type": "bidirectional",
        "description": "GPIO with WKUP5 wake-up, SEG19 LCD, SPI2_MOSI and ADC_IN15 functions."
      },
      {
        "number": "24",
        "name": "XT32KO",
        "type": "output",
        "description": "32768 Hz crystal oscillator output pin."
      },
      {
        "number": "25",
        "name": "XT32KI",
        "type": "input",
        "description": "32768 Hz crystal oscillator input pin."
      },
      {
        "number": "26",
        "name": "VDD15",
        "type": "power_out",
        "description": "LDO output, connect a 100 nF capacitor to ground."
      },
      {
        "number": "27",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground (also VSSA)."
      },
      {
        "number": "28",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply (also VDDA), operating range 1.65 V to 5.5 V."
      },
      {
        "number": "29",
        "name": "VREFP",
        "type": "passive",
        "description": "Reference voltage pin."
      },
      {
        "number": "30",
        "name": "PD11",
        "type": "bidirectional",
        "description": "GPIO with WKUP6 wake-up, FOUT0 clock output, ATIM_BRK1 and ADC_IN0 functions; PD0 (SEG22/UART5_RX/GPT2_CH1/ADC_IN7) shares this pin in the QFN32 figure."
      },
      {
        "number": "31",
        "name": "PD1",
        "type": "bidirectional",
        "description": "GPIO with SEG23 LCD, UART5_TX, GPT2_CH2 and ADC_IN1 functions; PD6 (WKUP7/ANATST/ATIM_BRK2/ADC_IN10) shares this pin per the QFN32 figure."
      },
      {
        "number": "32",
        "name": "PD7",
        "type": "bidirectional",
        "description": "GPIO that also serves as UART3_RX and SWCLK (SWD clock)."
      },
      {
        "number": "33",
        "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-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Several QFN32 pins are shared by two GPIOs, shown in parentheses in the package figure (page 42). Ta; Table 2-1 lists PB1 with the function 'external wake-up pin' where it should list GPIO, which looks ; Table 2-1 lists PB11 with SPI1_MOSI, but the package figures show SPI0_MOSI. The datasheet is incons"
        ],
        "pages_sent": 64,
        "cost_usd": 0.5935,
        "at": "2026-10-22T22:48:06"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/76a8ad4a0d656efffe20d60a0802004a.pdf",
        "pages": 100,
        "sha256": "bfd0cc3c1ded70af",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "df2088f8c6a7544b168f73106149d8dcd7f119584139a259ee2a3a68b846b9e6",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "FUDAN MICRO",
      "Package": "QFN-32(5x5)",
      "Category": "Single Chip Microcomputer/Microcontroller",
      "Pins": "33"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bfd0cc3c1ded70af0064fd22aec12345f3c6e3883638bbcc16fc8268cb73fcd7",
      "rows": [
        {
          "name": "Supply voltage (VDD, VDDA)",
          "symbol": "VDD-VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Pin voltage",
          "symbol": "VPIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6.5,
          "conditions": "min printed as VSS-0.3",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "ADC reference voltage",
          "symbol": "VREFP-VREFN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Voltage difference between all ground pins",
          "symbol": "|ΔVSS|",
          "kind": "absolute_maximum",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "AEC-Q100 grade2",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM, PC5 (DAC_OUT)",
          "symbol": "HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2000,
          "typ": null,
          "max": 2000,
          "conditions": "TA=25℃, JEDEC JS-001",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM, all other pins",
          "symbol": "HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -4000,
          "typ": null,
          "max": 4000,
          "conditions": "TA=25℃, JEDEC JS-001",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "ESD CDM",
          "symbol": "CDM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1000,
          "typ": null,
          "max": 1000,
          "conditions": "TA=25℃, JEDEC JS-002",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "IO latchup",
          "symbol": "LU",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -210,
          "typ": null,
          "max": 210,
          "conditions": "-(0.5VDD) < VI < (1.5VDD), TA=25℃, JESD78E",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Max current into VDD (source)",
          "symbol": "ΣIVDD",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Max current out of VSS (sink)",
          "symbol": "ΣIVSS",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Total IO sink current",
          "symbol": "ΣIIO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "all IO sink",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "Total IO source current",
          "symbol": "ΣIIO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "all IO source",
          "source_page": 61,
          "source": "datasheet"
        },
        {
          "name": "AHB clock frequency",
          "symbol": "fHCLK",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 64,
          "conditions": "TA=-40~105C",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "APB clock frequency",
          "symbol": "fPCLK",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 64,
          "conditions": "TA=-40~105C",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Operating voltage range",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.65,
          "typ": null,
          "max": 5.5,
          "conditions": "TA=-40~105C",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Backup supply voltage, no power switching",
          "symbol": "VBAT",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": 5.5,
          "conditions": "power switching not used, shorted to VDD",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Backup supply voltage, with power switching",
          "symbol": "VBAT",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": 4.2,
          "conditions": "power switching used, VBAT supplied separately",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 8MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.36,
          "max": 1.65,
          "conditions": "fAHB=8MHz (RCHF), PLL off, Flash 0 wait, TA=25℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 8MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 1.7,
          "conditions": "fAHB=8MHz (RCHF), PLL off, Flash 0 wait, TA=105℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 16MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.19,
          "max": 2.4,
          "conditions": "fAHB=16MHz (RCHF), PLL off, Flash 0 wait, TA=25℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 16MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 2.5,
          "conditions": "fAHB=16MHz (RCHF), PLL off, Flash 0 wait, TA=105℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 24MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.15,
          "max": 3.5,
          "conditions": "fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=25℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 24MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.12,
          "max": 3.6,
          "conditions": "fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=105℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 64MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5.66,
          "max": 6,
          "conditions": "fAHB=64MHz, PLL on, Flash 1 wait, TA=25℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 64MHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5.73,
          "max": 6.2,
          "conditions": "fAHB=64MHz, PLL on, Flash 1 wait, TA=105℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 614KHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 137,
          "max": 150,
          "conditions": "fAHB=614KHz (RCLF), PLL off, Flash 0 wait, TA=25℃",
          "source_page": 62,
          "source": "datasheet"
        },
        {
          "name": "Run mode current 614KHz",
          "symbol": "IDDRUN",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 179,
          "max": 200,
          "conditions": "fAHB=614KHz (RCLF), PLL off, Flash 0 wait, TA=105℃",
          "source_page": 62,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "FM33LG023A (FUDAN MICRO) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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