STM8S103K3T3C

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  "type": "component",
  "slug": "stm8s103k3t3c",
  "title": "STM8S103K3T3C",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "STM8S103K3T3C",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-32(7x7)",
    "pin_count": 32,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922134751531008",
    "parts": {
      "symbol": "stm8s103k3t3c.kicad_sym",
      "footprint": "stm8s103k3t3c.kicad_mod",
      "model_3d": "stm8s103k3t3c-hero.glb",
      "model_3d_plain": "stm8s103k3t3c.glb",
      "model_3d_step": "stm8s103k3t3c-etched.step",
      "model_3d_step_plain": "stm8s103k3t3c.step",
      "lbr": "stm8s103k3t3c.lbr"
    },
    "distributor_links": {
      "lcsc": "C1338253",
      "digikey": "497-11580-ND",
      "mouser": "511-STM8S103K3T3C"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T21:48:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-11580-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-STM8S103K3T3C",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Reset pin (I/O, weak pull-up) used for the device reset; its characteristics are given in the NRST pin characteristics table (Table 42)."
      },
      {
        "number": "2",
        "name": "PA1/OSCIN",
        "type": "bidirectional",
        "description": "Port A1 is also the resonator/crystal input OSCIN, and in Halt/Active-halt it is forced to input weak pull-up and cannot wake the device, so it should be used only as an input if Halt/Active-halt is used."
      },
      {
        "number": "3",
        "name": "PA2/OSCOUT",
        "type": "bidirectional",
        "description": "Port A2 is also the resonator/crystal output OSCOUT (slow O1 output speed, with weak pull-up and push-pull/open-drain options)."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "5",
        "name": "VCAP",
        "type": "passive",
        "description": "Connection for the 1.8 V regulator capacitor, whose external VCAP specification is given in Section 10.3.1."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply, specified for 2.95 to 5.5 V operation."
      },
      {
        "number": "7",
        "name": "PA3/TIM2_CH3 [SPI_NSS]",
        "type": "bidirectional",
        "description": "Port A3 with default Timer 2 channel 3 function, high sink capable, and SPI master/slave select available only when remapped via AFR1."
      },
      {
        "number": "8",
        "name": "PF4",
        "type": "bidirectional",
        "description": "Port F4 general-purpose I/O with slow output speed (O1), floating/weak pull-up input options and push-pull output."
      },
      {
        "number": "9",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B7 general-purpose I/O with slow output speed (O1), floating/weak pull-up input options and push-pull output."
      },
      {
        "number": "10",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B6 general-purpose I/O with slow output speed (O1), floating/weak pull-up input options and push-pull output."
      },
      {
        "number": "11",
        "name": "PB5/I2C_SDA",
        "type": "bidirectional",
        "description": "Port B5 with I2C data line as a true open-drain I/O (P-buffer, weak pull-up and protection diode to VDD not implemented)."
      },
      {
        "number": "12",
        "name": "PB4/I2C_SCL",
        "type": "bidirectional",
        "description": "Port B4 with I2C clock line as a true open-drain I/O (P-buffer, weak pull-up and protection diode to VDD not implemented)."
      },
      {
        "number": "13",
        "name": "PB3/AIN3/TIM1_ETR",
        "type": "bidirectional",
        "description": "Port B3 with analog input 3 and Timer 1 external trigger, high sink capable with programmable speed (O3)."
      },
      {
        "number": "14",
        "name": "PB2/AIN2/TIM1_CH3N",
        "type": "bidirectional",
        "description": "Port B2 with analog input 2 and Timer 1 inverted channel 3, high sink capable with programmable speed (O3)."
      },
      {
        "number": "15",
        "name": "PB1/AIN1/TIM1_CH2N",
        "type": "bidirectional",
        "description": "Port B1 with analog input 1 and Timer 1 inverted channel 2, high sink capable with programmable speed (O3)."
      },
      {
        "number": "16",
        "name": "PB0/AIN0/TIM1_CH1N",
        "type": "bidirectional",
        "description": "Port B0 with analog input 0 and Timer 1 inverted channel 1, high sink capable with programmable speed (O3)."
      },
      {
        "number": "17",
        "name": "PE5/SPI_NSS",
        "type": "bidirectional",
        "description": "Port E5 with SPI master/slave select, high sink capable with programmable speed (O3)."
      },
      {
        "number": "18",
        "name": "PC1/TIM1_CH1/UART1_CK",
        "type": "bidirectional",
        "description": "Port C1 with Timer 1 channel 1 and UART1 clock, high sink capable with programmable speed (O3)."
      },
      {
        "number": "19",
        "name": "PC2/TIM1_CH2",
        "type": "bidirectional",
        "description": "Port C2 with Timer 1 channel 2, high sink capable with programmable speed (O3)."
      },
      {
        "number": "20",
        "name": "PC3/TIM1_CH3",
        "type": "bidirectional",
        "description": "Port C3 with Timer 1 channel 3, high sink capable with programmable speed (O3)."
      },
      {
        "number": "21",
        "name": "PC4/TIM1_CH4/CLK_CCO",
        "type": "bidirectional",
        "description": "Port C4 with Timer 1 channel 4 or configurable clock output, high sink capable with programmable speed (O3)."
      },
      {
        "number": "22",
        "name": "PC5/SPI_SCK",
        "type": "bidirectional",
        "description": "Port C5 with SPI clock, high sink capable with programmable speed (O3)."
      },
      {
        "number": "23",
        "name": "PC6/SPI_MOSI",
        "type": "bidirectional",
        "description": "Port C6 with SPI master out / slave in, high sink capable with programmable speed (O3)."
      },
      {
        "number": "24",
        "name": "PC7/SPI_MISO",
        "type": "bidirectional",
        "description": "Port C7 with SPI master in / slave out, high sink capable with programmable speed (O3)."
      },
      {
        "number": "25",
        "name": "PD0/TIM1_BKIN [CLK_CCO]",
        "type": "bidirectional",
        "description": "Port D0 with Timer 1 break input, and configurable clock output available when remapped via AFR5; high sink capable."
      },
      {
        "number": "26",
        "name": "PD1/SWIM",
        "type": "bidirectional",
        "description": "SWIM single-wire data interface, with input pull-up during reset phase and after internal reset release; high sink capable with fast/slow programmable speed (O4)."
      },
      {
        "number": "27",
        "name": "PD2 [TIM2_CH3]",
        "type": "bidirectional",
        "description": "Port D2 general-purpose I/O, high sink capable; Timer 2 channel 3 is available only when remapped via AFR1."
      },
      {
        "number": "28",
        "name": "PD3/TIM2_CH2/ADC_ETR",
        "type": "bidirectional",
        "description": "Port D3 with Timer 2 channel 2 and ADC external trigger, high sink capable with programmable speed (O3)."
      },
      {
        "number": "29",
        "name": "PD4/BEEP/TIM2_CH1",
        "type": "bidirectional",
        "description": "Port D4 with Timer 2 channel 1 and BEEP output, high sink capable with programmable speed (O3)."
      },
      {
        "number": "30",
        "name": "PD5/UART1_TX",
        "type": "bidirectional",
        "description": "Port D5 with UART1 data transmit, high sink capable with programmable speed (O3)."
      },
      {
        "number": "31",
        "name": "PD6/UART1_RX",
        "type": "bidirectional",
        "description": "Port D6 with UART1 data receive, high sink capable with programmable speed (O3)."
      },
      {
        "number": "32",
        "name": "PD7/TLI [TIM1_CH4]",
        "type": "bidirectional",
        "description": "Port D7 with top level interrupt (TLI) input; Timer 1 channel 4 is available only when remapped via AFR6; high sink capable."
      }
    ],
    "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: Datasheet classifies VCAP only as power type 'S' with the note '1.8 V regulator capacitor'; it does ; Datasheet lists NRST as type I/O with weak pull-up and no explicit input/output direction limits in ; Port pins are typed bidirectional (datasheet type 'I/O'). Alternate-function names in square bracket"
        ],
        "pages_sent": 57,
        "cost_usd": 0.2266,
        "at": "2026-10-07T21:48:06"
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      "datasheet": {
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        "pages": 121,
        "sha256": "ac23789ac0a2f408",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 32,
        "described": 32,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "be0e412f1c66fee70039b0e109e0cc7c823161dda97593718afa97569bc61ce3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "sha256": "26f935b2a60631d04caadf7d50e3f091489139a4a6b1e8626dcb167671b177b3",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-32(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "32"
    }
  },
  "variants": [],
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  "discovery_pitch": "STM8S103K3T3C (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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