ATTINY44A-SSU

{
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  "type": "component",
  "slug": "attiny44a-ssu",
  "title": "ATTINY44A-SSU",
  "brief": "Microchip Tech Microcontrollers (MCU/MPU/SOC), SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "embedded processors & controllers",
    "attiny44a-ssu",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "ATTINY44A-SSU",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
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      "model_3d_step": "attiny44a-ssu-etched.step",
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      "lbr": "attiny44a-ssu.lbr"
    },
    "distributor_links": {
      "lcsc": "C412819",
      "digikey": "ATTINY44A-SSU-ND",
      "mouser": "556-ATTINY44A-SSU"
    },
    "distributor_check": {
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATTINY44A-SSU-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-ATTINY44A-SSU",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage pin; the device operates from 1.8 to 5.5 V."
      },
      {
        "number": "2",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0 is a bidirectional I/O pin with selectable internal pull-up, also serving as XTAL1/CLKI (PCINT8), and it is tri-stated when reset becomes active."
      },
      {
        "number": "3",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 is a bidirectional I/O pin with selectable internal pull-up, also serving as XTAL2 (PCINT9), and it is tri-stated when reset becomes active."
      },
      {
        "number": "4",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 is a bidirectional I/O pin with selectable internal pull-up that acts as the RESET input (PCINT11/RESET/dW) unless the RSTDISBL fuse is programmed to 0, in which case it is a normal I/O pin."
      },
      {
        "number": "5",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 is a bidirectional I/O pin with selectable internal pull-up, also serving as INT0, OC0A, CKOUT and PCINT10, and it is tri-stated when reset becomes active."
      },
      {
        "number": "6",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7 is a bidirectional I/O pin with selectable internal pull-up, also serving as ICP, OC0B, ADC7 and PCINT7, and it is tri-stated when reset becomes active."
      },
      {
        "number": "7",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6 is a bidirectional I/O pin with selectable internal pull-up, also serving as OC1A, SDA, MOSI, DI, ADC6 and PCINT6, and it is tri-stated when reset becomes active."
      },
      {
        "number": "8",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5 is a bidirectional I/O pin with selectable internal pull-up, also serving as DO, MISO, OC1B, ADC5 and PCINT5, and it is tri-stated when reset becomes active."
      },
      {
        "number": "9",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4 is a bidirectional I/O pin with selectable internal pull-up, also serving as USCK, SCL, T1, ADC4 and PCINT4, and it is tri-stated when reset becomes active."
      },
      {
        "number": "10",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3 is a bidirectional I/O pin with selectable internal pull-up, also serving as T0, ADC3 and PCINT3, and it is tri-stated when reset becomes active."
      },
      {
        "number": "11",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2 is a bidirectional I/O pin with selectable internal pull-up, also serving as AIN1, ADC2 and PCINT2, and it is tri-stated when reset becomes active."
      },
      {
        "number": "12",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1 is a bidirectional I/O pin with selectable internal pull-up, also serving as AIN0, ADC1 and PCINT1, and it is tri-stated when reset becomes active."
      },
      {
        "number": "13",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Port A bit 0 is a bidirectional I/O pin with selectable internal pull-up, also serving as AREF, ADC0 and PCINT0, and it is tri-stated when reset becomes active."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device."
      }
    ],
    "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 PDIP/SOIC pin-to-name mapping was reconstructed from the flattened text of the Figure 1-1 pinout; PB3 is multi-function (RESET/dW). It is typed bidirectional because it is a Port B I/O pin; for ERC ; Package mapping confirmed from the ordering table on page 271: ATtiny44A-SSU uses package 14S1, the "
        ],
        "pages_sent": 46,
        "cost_usd": 0.1904,
        "at": "2026-10-21T00:55:12"
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        "pages": 286,
        "sha256": "b449fc327372862b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-21",
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  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "SOIC-14",
      "Category": "Embedded Processors & Controllers",
      "Pins": "14"
    },
    "appearance": {
      "contacts": {
        "quote": "– H: NiPdAu lead finish – F, N, U: matte tin",
        "page": 270,
        "doc": "ds.pdf",
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          "name": "Calibrated Oscillator Target Frequency Range (user calibration)",
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          "name": "Operating Temperature",
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        {
          "name": "Storage Temperature",
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          "name": "Voltage on any pin except RESET with respect to Ground",
          "symbol": "",
          "kind": "absolute_maximum",
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          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "Printed as VCC+0.5V; expression not stored as number",
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        {
          "name": "Voltage on RESET with respect to Ground",
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          "name": "Maximum Operating Voltage",
          "symbol": "",
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        {
          "name": "DC Current per I/O Pin",
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          "name": "DC Current VCC and GND Pins",
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          "name": "Input Low Voltage, RESET Pin as Reset",
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        {
          "name": "Output Low Voltage (except RESET pin)",
          "symbol": "VOL",
          "kind": "electrical",
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        {
          "name": "Output Low Voltage (except RESET pin)",
          "symbol": "VOL",
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          "name": "Output High-voltage (except RESET pin)",
          "symbol": "VOH",
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          "name": "Output High-voltage (except RESET pin)",
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          "name": "Input Leakage Current I/O Pin (pin low, absolute value)",
          "symbol": "ILIL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VCC = 5.5V, pin low (absolute value)",
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        {
          "name": "Input Leakage Current I/O Pin (pin high, absolute value)",
          "symbol": "ILIH",
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          "unit": "µA",
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          "typ": null,
          "max": 1,
          "conditions": "VCC = 5.5V, pin high (absolute value)",
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        {
          "name": "Pull-up Resistor, I/O Pin",
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          "kind": "electrical",
          "unit": "kΩ",
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          "typ": null,
          "max": 50,
          "conditions": "VCC = 5.5V, input low",
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        {
          "name": "Pull-up Resistor, Reset Pin",
          "symbol": "RPU",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 30,
          "typ": null,
          "max": 60,
          "conditions": "VCC = 5.5V, input low",
          "source_page": 173,
          "source": "datasheet"
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        {
          "name": "Supply Current, Active Mode",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "f = 1 MHz, VCC = 2V",
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          "source": "datasheet"
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        {
          "name": "Supply Current, Active Mode",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.2,
          "max": 2,
          "conditions": "f = 4 MHz, VCC = 3V",
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        {
          "name": "Supply Current, Active Mode",
          "symbol": "ICC",
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          "max": 7,
          "conditions": "f = 8 MHz, VCC = 5V",
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          "source": "datasheet"
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        {
          "name": "Supply Current, Idle Mode",
          "symbol": "ICC",
          "kind": "electrical",
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          "max": 0.2,
          "conditions": "f = 1 MHz, VCC = 2V",
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        {
          "name": "Supply Current, Idle Mode",
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          "name": "Supply Current, Idle Mode",
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          "conditions": "f = 8 MHz, VCC = 5V",
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        {
          "name": "Supply Current, Power-Down Mode",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 4,
          "max": 10,
          "conditions": "WDT enabled, VCC = 3V",
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          "name": "Supply Current, Power-Down Mode",
          "symbol": "ICC",
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          "conditions": "WDT disabled, VCC = 3V",
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        {
          "name": "Calibration Accuracy, Factory Calibration",
          "symbol": "",
          "kind": "tolerance",
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          "conditions": "Factory calibration, target 8.0 MHz, VCC 3V, 25°C",
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          "conditions": "User calibration, fixed frequency, fixed voltage 1.8V - 5.5V, fixed temperature -40°C to +85°C",
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          "source": "datasheet"
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        {
          "name": "Minimum Pulse Width on RESET Pin",
          "symbol": "tRST",
          "kind": "timing",
          "unit": "ns",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": "VCC = 1.8V",
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          "source": "datasheet"
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        {
          "name": "Minimum Pulse Width on RESET Pin",
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          "conditions": "VCC = 3V",
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        {
          "name": "Minimum Pulse Width on RESET Pin",
          "symbol": "tRST",
          "kind": "timing",
          "unit": "ns",
          "min": 400,
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          "conditions": "VCC = 5V",
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          "name": "Internal Bandgap Reference Voltage",
          "symbol": "VBG",
          "kind": "electrical",
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          "max": 1.2,
          "conditions": "VCC = 5V, TA = 25°C",
          "source_page": 176,
          "source": "datasheet"
        },
        {
          "name": "Minimum Pulse Width on Brown-out Reset",
          "symbol": "tBOD",
          "kind": "timing",
          "unit": "µs",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
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        {
          "name": "Power-On Reset Release Threshold",
          "symbol": "VPOR",
          "kind": "electrical",
          "unit": "V",
          "min": 1.1,
          "typ": 1.4,
          "max": 1.6,
          "conditions": "Threshold where device is released from reset when voltage is rising",
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          "source": "datasheet"
        },
        {
          "name": "Power-On Reset Activation Threshold",
          "symbol": "VPOA",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": 1.3,
          "max": 1.6,
          "conditions": "",
          "source_page": 176,
          "source": "datasheet"
        },
        {
          "name": "VBOT, BODLEVEL[2:0] = 110",
          "symbol": "VBOT",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": 1.8,
          "max": 2,
          "conditions": "BODLEVEL[2:0] = 110",
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        {
          "name": "VBOT, BODLEVEL[2:0] = 101",
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          "unit": "V",
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          "typ": 2.7,
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          "conditions": "BODLEVEL[2:0] = 101",
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          "name": "VBOT, BODLEVEL[2:0] = 100",
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          "kind": "electrical",
          "unit": "V",
          "min": 4.1,
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          "max": 4.5,
          "conditions": "BODLEVEL[2:0] = 100",
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