STC12H1K16-36I-DIP20

{
  "slug": "stc12h1k16-36i-dip20",
  "version": "0.1.0",
  "type": "component",
  "description": "STC Micro Microcontrollers (MCU/MPU/SOC), DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stc12h1k16-36i-dip20",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stc12h1k16-36i-dip20.kicad_sym",
    "stc12h1k16-36i-dip20.kicad_mod",
    "stc12h1k16-36i-dip20.glb",
    "stc12h1k16-36i-dip20.step",
    "stc12h1k16-36i-dip20.lbr",
    "docs/hero.png",
    "docs/stc12h1k16-36i-dip20-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stc12h1k16-36i-dip20-hero.glb",
    "stc12h1k16-36i-dip20-hero.overlay.json",
    "stc12h1k16-36i-dip20-etched.glb"
  ],
  "component": {
    "mpn": "STC12H1K16-36I-DIP20",
    "manufacturer": "STC Micro",
    "package": "DIP-20",
    "pin_count": 20,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603394806823870464",
    "parts": {
      "symbol": "stc12h1k16-36i-dip20.kicad_sym",
      "footprint": "stc12h1k16-36i-dip20.kicad_mod",
      "model_3d": "stc12h1k16-36i-dip20-hero.glb",
      "model_3d_plain": "stc12h1k16-36i-dip20-etched.glb",
      "model_3d_step": "stc12h1k16-36i-dip20-etched.step",
      "model_3d_step_plain": "stc12h1k16-36i-dip20.step",
      "lbr": "stc12h1k16-36i-dip20.lbr"
    },
    "distributor_links": {
      "lcsc": "C22472725"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T10:33:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P5.4/RST/MCLKO",
        "type": "bidirectional",
        "description": "Standard bidirectional I/O P5.4 that can be configured as the active-low reset input RST or as the MCLKO master-clock output; when used as a plain I/O its internal 4K pull-up stays on for about 6.5 ms after power-up."
      },
      {
        "number": "2",
        "name": "P3.0/RxD/INT4",
        "type": "bidirectional",
        "description": "Standard I/O P3.0 serving as UART1 receive (RxD) and external interrupt INT4; P3.0, P3.1 and P3.2 must not all be low at power-on unless USB software download is intended, otherwise the chip enters USB download mode."
      },
      {
        "number": "3",
        "name": "P3.1/TxD",
        "type": "bidirectional",
        "description": "Standard I/O P3.1 serving as UART1 transmit (TxD); it is the ISP/emulation download pin and is weakly pulled up (quasi-bidirectional) after power-on."
      },
      {
        "number": "4",
        "name": "P5.6 (RxD2_2/MCLKO_2/XTALO)",
        "type": "bidirectional",
        "description": "Standard I/O P5.6 that can be used as UART2 receive (RxD2_2), master-clock output (MCLKO_2) or external crystal output XTALO."
      },
      {
        "number": "5",
        "name": "P5.7 (TxD2_2/XTALI)",
        "type": "bidirectional",
        "description": "Standard I/O P5.7 that can be used as UART2 transmit (TxD2_2) or the external crystal/external clock input XTALI."
      },
      {
        "number": "6",
        "name": "P3.2 (INT0/SCLK_4/SCL_4)",
        "type": "bidirectional",
        "description": "Standard I/O P3.2 serving as external interrupt 0 (INT0), SPI clock (SCLK_4) or I2C clock (SCL_4); it is one of the USB-download boot-select pins together with P3.0 and P3.1."
      },
      {
        "number": "7",
        "name": "P3.3 (INT1/MISO_4/SDA_4)",
        "type": "bidirectional",
        "description": "Standard I/O P3.3 serving as external interrupt 1 (INT1), SPI master-in/slave-out (MISO_4) or I2C data (SDA_4)."
      },
      {
        "number": "8",
        "name": "P3.4 (T0/T1CLKO/MOSI_4/ECI)",
        "type": "bidirectional",
        "description": "Standard I/O P3.4 serving as Timer 0 external count input (T0), Timer 1 clock output (T1CLKO), SPI master-out/slave-in (MOSI_4), PCA external input (ECI) or PWM external trigger input (PWMETI)."
      },
      {
        "number": "9",
        "name": "P3.5/T1/T0CLKO/RxD_2/SS_4/PWM6/CCP1",
        "type": "bidirectional",
        "description": "Standard I/O P3.5 serving as Timer 1 external count input (T1), Timer 0 clock output (T0CLKO), UART1 receive alternate (RxD_2), SPI slave select (SS_4), PWM6 or PCA module 1 (CCP1)."
      },
      {
        "number": "10",
        "name": "Gnd/AGnd",
        "type": "power_in",
        "description": "Ground pin; the same pin serves as the ADC analog ground (AGnd), and the datasheet asks that the ADC analog ground be tied directly to the system ground with a short, thick trace."
      },
      {
        "number": "11",
        "name": "P3.7/ADC14/TxD_2/PWM5/CCP0",
        "type": "bidirectional",
        "description": "Standard I/O P3.7 that can be used as ADC input channel 14, UART1 transmit alternate (TxD_2), PWM5 or PCA module 0 (CCP0)."
      },
      {
        "number": "12",
        "name": "P1.0/ADC0/RxD2/T3CLKO/PWM1P",
        "type": "bidirectional",
        "description": "Standard I/O P1.0 that can be used as ADC input channel 0, UART2 receive (RxD2), Timer 3 clock output (T3CLKO) or PWM1 positive output/capture (PWM1P)."
      },
      {
        "number": "13",
        "name": "P1.1/ADC1/TxD2/T4CLKO/PWM1N",
        "type": "bidirectional",
        "description": "Standard I/O P1.1 that can be used as ADC input channel 1, UART2 transmit (TxD2), Timer 4 clock output (T4CLKO) or PWM1 negative output/capture (PWM1N)."
      },
      {
        "number": "14",
        "name": "P1.2/ADC2/T2/PWM2P",
        "type": "bidirectional",
        "description": "Standard I/O P1.2 that can be used as ADC input channel 2, Timer 2 external count input (T2) or PWM2 positive output/capture (PWM2P)."
      },
      {
        "number": "15",
        "name": "P1.3/ADC3/T2CLKO/PWM2N",
        "type": "bidirectional",
        "description": "Standard I/O P1.3 that can be used as ADC input channel 3, Timer 2 clock output (T2CLKO) or PWM2 negative output/capture (PWM2N)."
      },
      {
        "number": "16",
        "name": "P1.4/ADC4/SS/PWM3P",
        "type": "bidirectional",
        "description": "Standard I/O P1.4 that can be used as ADC input channel 4, SPI slave select (SS) or PWM3 positive output/capture (PWM3P)."
      },
      {
        "number": "17",
        "name": "P1.5/ADC5/MOSI/PWM3N",
        "type": "bidirectional",
        "description": "Standard I/O P1.5 that can be used as ADC input channel 5, SPI master-out/slave-in (MOSI) or PWM3 negative output/capture (PWM3N)."
      },
      {
        "number": "18",
        "name": "P1.6/ADC6/RxD_3/MISO/SDA/PWM4P",
        "type": "bidirectional",
        "description": "Standard I/O P1.6 that can be used as ADC input channel 6, UART1 receive alternate (RxD_3), SPI master-in/slave-out (MISO), I2C data (SDA) or PWM4 positive output/capture (PWM4P); it is also a wake-up source from power-down."
      },
      {
        "number": "19",
        "name": "P1.7/ADC7/TxD_3/SCLK/SCL/PWM4N",
        "type": "bidirectional",
        "description": "Standard I/O P1.7 that can be used as ADC input channel 7, UART1 transmit alternate (TxD_3), SPI clock (SCLK), I2C clock (SCL) or PWM4 negative output/capture (PWM4N)."
      },
      {
        "number": "20",
        "name": "Vcc/AVcc/ADC_VRef+",
        "type": "power_in",
        "description": "Supply pin for the MCU (working voltage 1.9V to 5.5V), which also powers the ADC (AVcc) and serves as the ADC external reference input ADC_VRef+, which must be connected to an external reference of 2.4 V to MCU-VCC and must not float."
      }
    ],
    "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 DIP-20 pinout is taken from the figure for the TSSOP20/SOP20/DIP20 variant on the STC12H1K08 dra; Pin numbers were read from the DIP20/TSSOP20 drawing; the extracted pin-function table columns are g; Pin 20 is shared by Vcc, AVcc and ADC_VRef+ and is typed as power_in; the ADC_VRef+ function is an i"
        ],
        "pages_sent": 193,
        "cost_usd": 1.054,
        "at": "2026-10-16T10:32:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603394806823870464",
        "pages": 1019,
        "sha256": "77659dc2f42f051a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stc12h1k16-36i-dip20.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          26.162,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ca359c9b9e0ce94efcb6c96866513f659eef6517d629ace3c4a0a779f6fd57bb",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stc12h1k16-36i-dip20-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          26.162,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "893034af95fa5412e0395bf5d895e40bfed33d630d7e8c872f977ae42a4fadfc",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}