AC6956C4

{
  "slug": "ac6956c4",
  "version": "0.1.0",
  "type": "component",
  "description": "JieLi Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "single chip microcomputer-microcontroller",
    "ac6956c4",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ac6956c4.kicad_sym",
    "ac6956c4.kicad_mod",
    "ac6956c4.glb",
    "ac6956c4.step",
    "ac6956c4.lbr",
    "docs/hero.png",
    "docs/ac6956c4-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ac6956c4-hero.glb",
    "ac6956c4-hero.overlay.json",
    "ac6956c4-etched.glb"
  ],
  "component": {
    "mpn": "AC6956C4",
    "manufacturer": "JieLi Tech",
    "package": "QFN-32(4x4)",
    "pin_count": 33,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ac1c6a4d6ed09578faaebfb685734764.pdf",
    "parts": {
      "symbol": "ac6956c4.kicad_sym",
      "footprint": "ac6956c4.kicad_mod",
      "model_3d": "ac6956c4-hero.glb",
      "model_3d_plain": "ac6956c4-etched.glb",
      "model_3d_step": "ac6956c4-etched.step",
      "model_3d_step_plain": "ac6956c4.step",
      "lbr": "ac6956c4.lbr"
    },
    "distributor_links": {
      "lcsc": "C5339900"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T00:43:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCOM",
        "type": "passive",
        "description": "DAC reference voltage pin (VCOM) for the audio DAC; the text gives no electrical limit for this pin."
      },
      {
        "number": "2",
        "name": "DACL",
        "type": "output",
        "description": "DAC left channel analog output."
      },
      {
        "number": "3",
        "name": "DACR",
        "type": "output",
        "description": "DAC right channel analog output."
      },
      {
        "number": "4",
        "name": "FMIP",
        "type": "input",
        "description": "FM single-ended input to the chip."
      },
      {
        "number": "5",
        "name": "PB11",
        "type": "bidirectional",
        "description": "General-purpose I/O with output drive of 8mA (output 0) or 8mA/64mA (output 1) per Table 2-5, also usable as SDPG (SDC power gate) or SPDIF_OUT."
      },
      {
        "number": "6",
        "name": "PB10",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as analog channel 2 right, SPI2 data out, ADC9, UART2 RX, or motor PWM channel 3 low side."
      },
      {
        "number": "7",
        "name": "PB9",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as analog channel 2 left, SPI2 clock, Timer0 capture, UART2 TX, or motor PWM channel 3 high side."
      },
      {
        "number": "8",
        "name": "PB8",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as analog channel 1 right, SPI2 data in, ADC8, or clock output 1."
      },
      {
        "number": "9",
        "name": "LDO_IN",
        "type": "power_in",
        "description": "Battery charger input; the datasheet gives a charger voltage of 4.5V to 5.5V (typ 5V)."
      },
      {
        "number": "10",
        "name": "VBAT",
        "type": "power_in",
        "description": "Main supply input; the datasheet gives a supply voltage of 2.2V to 5.5V (typ 3.7V)."
      },
      {
        "number": "11",
        "name": "BT_AVDD",
        "type": "power_out",
        "description": "Bluetooth analog supply output; the datasheet gives a voltage output of 1.3V at 100mA loading with VBAT=5V."
      },
      {
        "number": "12",
        "name": "PB3",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as Timer2 PWM output or ADC6 input."
      },
      {
        "number": "13",
        "name": "PB2",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA drive and high-voltage tolerance, which allows a pull-up to 5V; also usable as SPI1 data in or motor PWM channel 1 low side."
      },
      {
        "number": "14",
        "name": "PB1",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive and default internal pull-up (10K), also usable as the long-press reset input or SPI1 data out."
      },
      {
        "number": "15",
        "name": "PB0",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA drive and high-voltage tolerance, which allows a pull-up to 5V; also usable as SPI1 clock, UART1 TX, or motor PWM channel 1 high side."
      },
      {
        "number": "16",
        "name": "BT_RF",
        "type": "passive",
        "description": "Bluetooth RF antenna connection."
      },
      {
        "number": "17",
        "name": "BT_OSCI",
        "type": "input",
        "description": "Bluetooth oscillator input."
      },
      {
        "number": "18",
        "name": "BT_OSCO",
        "type": "output",
        "description": "Bluetooth oscillator output."
      },
      {
        "number": "19",
        "name": "PC5",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD1 clock, SPI1 data out B, UART2 RX, IIC SDA B, ADC13, or motor PWM channel 5 low side."
      },
      {
        "number": "20",
        "name": "PC4",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD1 command, SPI1 clock B, UART2 TX, IIC SCL B, ADC10, or motor PWM channel 5 high side."
      },
      {
        "number": "21",
        "name": "PC3",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD1 data 0 or SPI1 data in B."
      },
      {
        "number": "22",
        "name": "PC2",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD1 data 1, audio link data 0, touch channel 12, or motor auto-stop pin 5."
      },
      {
        "number": "23",
        "name": "USBDM",
        "type": "bidirectional",
        "description": "USB 2.0 negative data line with 4mA drive and internal pull-down (180K), also usable as UART1 RX or IIC SDA A."
      },
      {
        "number": "24",
        "name": "USBDP",
        "type": "bidirectional",
        "description": "USB 2.0 positive data line with 4mA drive and internal pull-down (1.5K), also usable as UART1 TX, IIC SCL A, or ADC12."
      },
      {
        "number": "25",
        "name": "PA10",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD0 clock, audio link word select B, ADC3, S/PDIF input B, touch channel 9, UART2 RX B, or motor PWM channel 4 low side."
      },
      {
        "number": "26",
        "name": "PA9",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as SD0 command, audio link serial clock B, S/PDIF input A, touch channel 8, UART2 TX B, or motor PWM channel 4 high side."
      },
      {
        "number": "27",
        "name": "PA1",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as analog channel 0 right, touch channel 1, ADC0, UART1 RX C, or motor PWM channel 0 low side."
      },
      {
        "number": "28",
        "name": "PA0",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive, also usable as analog channel 0 left, touch channel 0, clock output 0, UART1 TX C, or motor PWM channel 0 high side."
      },
      {
        "number": "29",
        "name": "PC7",
        "type": "bidirectional",
        "description": "General-purpose I/O with 8mA/24mA drive (output 0) or 8mA/64mA (output 1) per Table 2-5, also usable as the microphone bias output."
      },
      {
        "number": "30",
        "name": "MIC",
        "type": "input",
        "description": "Microphone input channel to the on-chip analog MIC amplifier."
      },
      {
        "number": "31",
        "name": "VDDIO",
        "type": "power_in",
        "description": "I/O power supply; the datasheet gives a range of 2.2V to 3.6V and a 3.3V nominal I/O level."
      },
      {
        "number": "32",
        "name": "DACVSS",
        "type": "power_in",
        "description": "DAC ground reference pin."
      },
      {
        "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-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 MPN AC6956C4 does not appear in the datasheet, which covers the AC6956C only. The datasheet list; Figure 1-1 shows a GND pin in the package diagram, but Table 1-1 does not list it with a pin number,"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0302,
        "at": "2026-10-28T00:42:57"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/ac1c6a4d6ed09578faaebfb685734764.pdf",
        "pages": 13,
        "sha256": "238278052993fcaf",
        "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"
    },
    "models_3d": [
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        "role": "plain",
        "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": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ac6956c4-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "sha256": "b9802622780353e903a17665a42191d6c7aa28da2c643852ee0d73dc1cc5482c",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  }
}