AT89C4051-12PU

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  "component": {
    "mpn": "AT89C4051-12PU",
    "manufacturer": "Microchip Tech",
    "package": "PDIP-20",
    "pin_count": 20,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/32518bbd29f048caa64e52b063a36c82.pdf",
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    "distributor_links": {
      "lcsc": "C613480",
      "digikey": "AT89C4051-12PU-ND",
      "mouser": "556-A89C405112PU"
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      {
        "number": "1",
        "name": "RST/VPP",
        "type": "input",
        "description": "Reset input: holding RST high for two machine cycles while the oscillator runs resets the device, and it is raised to 12V to enable Flash programming."
      },
      {
        "number": "2",
        "name": "P3.0 (RXD)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as the serial input port RXD."
      },
      {
        "number": "3",
        "name": "P3.1 (TXD)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as the serial output port TXD, and is pulled low to indicate BUSY during programming."
      },
      {
        "number": "4",
        "name": "XTAL2",
        "type": "output",
        "description": "Output from the inverting oscillator amplifier, left unconnected when XTAL1 is driven by an external clock."
      },
      {
        "number": "5",
        "name": "XTAL1",
        "type": "input",
        "description": "Input to the inverting oscillator amplifier and to the internal clock operating circuit."
      },
      {
        "number": "6",
        "name": "P3.2 (INT0)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as external interrupt 0 and is pulsed to program a byte during Flash programming."
      },
      {
        "number": "7",
        "name": "P3.3 (INT1)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as external interrupt 1 and is used for programming control."
      },
      {
        "number": "8",
        "name": "P3.4 (T0)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as the external input to timer 0 and is used for programming control."
      },
      {
        "number": "9",
        "name": "P3.5 (T1)",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that serves as the external input to timer 1 and is used for programming control."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "P3.7",
        "type": "bidirectional",
        "description": "Port 3 bidirectional I/O pin with internal pullup that is also used for Flash programming and verification control."
      },
      {
        "number": "12",
        "name": "P1.0 (AIN0)",
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        "description": "Port 1 bidirectional I/O pin that requires an external pullup, sinks up to 20 mA, and serves as the positive input of the on-chip analog comparator."
      },
      {
        "number": "13",
        "name": "P1.1 (AIN1)",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin that requires an external pullup, sinks up to 20 mA, and serves as the negative input of the on-chip analog comparator."
      },
      {
        "number": "14",
        "name": "P1.2",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "15",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "16",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "17",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "18",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "19",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "Port 1 bidirectional I/O pin with internal pullup whose output buffer can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, specified for operation from 2.7V to 6.0V for the AT89C4051-12PU."
      }
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  "title": "AT89C4051-12PU",
  "brief": "Microchip Tech Pre-ordered MCUs, PDIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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      "Package": "PDIP-20",
      "Category": "Embedded Processors & Controllers",
      "Pins": "20"
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          "conditions": "Test Freq. = 1 MHz, TA = 25°C",
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          "name": "Power Supply Current, Active Mode",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
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          "max": 15,
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          "name": "Power Supply Current, Active Mode",
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          "name": "Power Supply Current, Idle Mode",
          "symbol": "ICC",
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          "unit": "mA",
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          "conditions": "Idle Mode, 12 MHz, VCC = 3V; P1.0 & P1.1 = 0V or VCC",
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          "name": "Power Supply Current, Power-down Mode",
          "symbol": "ICC",
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          "name": "Oscillator Frequency",
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          "name": "High Time",
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          "kind": "timing",
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          "name": "Rise Time",
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          "name": "Brown-out Detection Threshold Tolerance (nominal 2.1 V)",
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      ]
    }
  },
  "discovery_triggers": [
    "at89c4051-12pu"
  ],
  "discovery_pitch": "AT89C4051-12PU (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "visibility": "public"
}