AVR128DA28T-I/SO

{
  "schema_version": 1,
  "type": "component",
  "slug": "avr128da28t-i-so",
  "title": "AVR128DA28T-I/SO",
  "brief": "Microchip Tech Microcontrollers (MCU/MPU/SOC), SOIC-28-300mil. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "avr128da28t-i"
  ],
  "component": {
    "mpn": "AVR128DA28T-I/SO",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-28-300mil",
    "pin_count": 28,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589945796516360192",
    "parts": {
      "symbol": "avr128da28t-i.kicad_sym",
      "footprint": "avr128da28t-i.kicad_mod",
      "model_3d": "avr128da28t-i-so-hero.glb",
      "model_3d_plain": "avr128da28t-i.glb",
      "model_3d_step": "avr128da28t-i-etched.step",
      "model_3d_step_plain": "avr128da28t-i.step",
      "lbr": "avr128da28t-i.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "PA7",
        "type": "bidirectional",
        "description": "PORTA bit 7 GPIO. Alt: CLKOUT, PTC X7/Y7, AC0/1/2 OUT, USART0 XDIR (alt), SPI0 SS, TCD0 WOD, EVOUTA (alt)."
      },
      {
        "number": "2",
        "name": "PC0",
        "type": "bidirectional",
        "description": "PORTC bit 0 GPIO. Alt: USART1 TxD, SPI1 MOSI, TCA0 WO0 (alt), TCB2 WO, CCL LUT1 IN0."
      },
      {
        "number": "3",
        "name": "PC1",
        "type": "bidirectional",
        "description": "PORTC bit 1 GPIO. Alt: USART1 RxD, SPI1 MISO, TCA0 WO1 (alt), TCB3 WO (alt), CCL LUT1 IN1."
      },
      {
        "number": "4",
        "name": "PC2",
        "type": "bidirectional",
        "description": "PORTC bit 2 GPIO (TWI-capable pad). Alt: USART1 XCK, SPI1 SCK, TWI0 SDA(M) (alt), TCA0 WO2 (alt), EVOUTC, CCL LUT1 IN2."
      },
      {
        "number": "5",
        "name": "PC3",
        "type": "bidirectional",
        "description": "PORTC bit 3 GPIO (TWI-capable pad). Alt: USART1 XDIR, SPI1 SS, TWI0 SCL(M) (alt), TCA0 WO3 (alt), CCL LUT1 OUT."
      },
      {
        "number": "6",
        "name": "PD0",
        "type": "bidirectional",
        "description": "PORTD bit 0 GPIO. Alt: ADC0 AIN0, PTC X16/Y16, AC0/1/2 AINN1, TCA0 WO0 (alt), CCL LUT2 IN0."
      },
      {
        "number": "7",
        "name": "PD1",
        "type": "bidirectional",
        "description": "PORTD bit 1 GPIO. Alt: ADC0 AIN1, PTC X17/Y17, ZCD0 ZCIN, TCA0 WO1 (alt), CCL LUT2 IN1."
      },
      {
        "number": "8",
        "name": "PD2",
        "type": "bidirectional",
        "description": "PORTD bit 2 GPIO. Alt: ADC0 AIN2, PTC X18/Y18, AC0/1/2 AINP0, TCA0 WO2 (alt), EVOUTD, CCL LUT2 IN2."
      },
      {
        "number": "9",
        "name": "PD3",
        "type": "bidirectional",
        "description": "PORTD bit 3 GPIO. Alt: ADC0 AIN3, PTC X19/Y19, AC0 AINN0, AC1 AINP1, TCA0 WO3 (alt), CCL LUT2 OUT."
      },
      {
        "number": "10",
        "name": "PD4",
        "type": "bidirectional",
        "description": "PORTD bit 4 GPIO. Alt: ADC0 AIN4, PTC X20/Y20, AC1 AINP2, AC2 AINP1, TCA0 WO4 (alt)."
      },
      {
        "number": "11",
        "name": "PD5",
        "type": "bidirectional",
        "description": "PORTD bit 5 GPIO. Alt: ADC0 AIN5, PTC X21/Y21, AC1 AINN0, TCA0 WO5 (alt)."
      },
      {
        "number": "12",
        "name": "PD6",
        "type": "bidirectional",
        "description": "PORTD bit 6 GPIO. Alt: ADC0 AIN6, PTC X22/Y22, AC0/1/2 AINP3, DAC0 VOUT, TCB2 OUT (alt)."
      },
      {
        "number": "13",
        "name": "PD7",
        "type": "bidirectional",
        "description": "PORTD bit 7 GPIO. Alt: ADC0 VREFA (external ADC/DAC reference input), AIN7, PTC X23/Y23, AC0/1 AINN2, AC2 AINN0/AINN2, EVOUTD (alt)."
      },
      {
        "number": "14",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply pin, 1.8-5.5 V. Internally connected to VDD on this family, but must be decoupled locally with its own capacitor pair to GND."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Analog/digital ground return (paired with AVDD). Tie to system ground plane."
      },
      {
        "number": "16",
        "name": "PF0/XTAL32K1",
        "type": "bidirectional",
        "description": "PORTF bit 0 GPIO / 32.768 kHz crystal input XTAL32K1. Alt: ADC0 AIN16 (positive-input only), PTC X32/Y32, USART2 TxD, TCA0 WO0 (alt), TCD0 WOA (alt), CCL LUT3 IN0."
      },
      {
        "number": "17",
        "name": "PF1/XTAL32K2",
        "type": "bidirectional",
        "description": "PORTF bit 1 GPIO / 32.768 kHz crystal output XTAL32K2. Alt: ADC0 AIN17 (positive-input only), PTC X33/Y33, USART2 RxD, TCA0 WO1 (alt), TCD0 WOB (alt), CCL LUT3 IN1."
      },
      {
        "number": "18",
        "name": "PF6/RESET",
        "type": "input",
        "description": "External Reset input (active-low), input-only pin. Configurable as GPIO PF6 (input-only) in RSTCTRL. Pull to VDD with a resistor when used as RESET."
      },
      {
        "number": "19",
        "name": "UPDI",
        "type": "bidirectional",
        "description": "Unified Program and Debug Interface - single-wire programming/debug pin. Requires 4.7-10 kΩ pull-up to VDD in typical designs."
      },
      {
        "number": "20",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin, 1.8-5.5 V. Decouple locally with 100 nF ceramic to nearby GND (pin 21)."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground return (paired with VDD). Tie to system ground plane."
      },
      {
        "number": "22",
        "name": "PA0/EXTCLK",
        "type": "bidirectional",
        "description": "PORTA bit 0 GPIO / external clock input (EXTCLK) for the main clock. Alt: PTC X0/Y0, USART0 TxD, TCA0 WO0, CCL LUT0 IN0."
      },
      {
        "number": "23",
        "name": "PA1",
        "type": "bidirectional",
        "description": "PORTA bit 1 GPIO. Alt: PTC X1/Y1, USART0 RxD, TCA0 WO1, CCL LUT0 IN1."
      },
      {
        "number": "24",
        "name": "PA2",
        "type": "bidirectional",
        "description": "PORTA bit 2 GPIO (TWI-capable pad). Alt: PTC X2/Y2, USART0 XCK, TWI0 SDA(M) (default), TCA0 WO2, TCD0 WO, EVOUTA, CCL LUT0 IN2."
      },
      {
        "number": "25",
        "name": "PA3",
        "type": "bidirectional",
        "description": "PORTA bit 3 GPIO (TWI-capable pad). Alt: PTC X3/Y3, USART0 XDIR, TWI0 SCL(M) (default), TCA0 WO3, TCA1 WO, CCL LUT0 OUT."
      },
      {
        "number": "26",
        "name": "PA4",
        "type": "bidirectional",
        "description": "PORTA bit 4 GPIO. Alt: PTC X4/Y4, USART0 TxD (alt), SPI0 MOSI, TCA0 WO4, TCD0 WOA."
      },
      {
        "number": "27",
        "name": "PA5",
        "type": "bidirectional",
        "description": "PORTA bit 5 GPIO. Alt: PTC X5/Y5, USART0 RxD (alt), SPI0 MISO, TCA0 WO5, TCD0 WOB."
      },
      {
        "number": "28",
        "name": "PA6",
        "type": "bidirectional",
        "description": "PORTA bit 6 GPIO. Alt: PTC X6/Y6, USART0 XCK (alt), SPI0 SCK, TCD0 WOC, CCL LUT0 OUT (alt)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589945796516360192",
        "pages": null,
        "sha256": "4623d54c2494b8fd",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "avr128da28t-i.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          17.9,
          2.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b889a13dbe9ec59e79fa9f1b5118b00bfa54f9582392335ff3365b64afc264b1",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "avr128da28t-i-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          17.9,
          2.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "34cda29f5e0fb1dcdb2bcb2e50d17f418551c3570673cb86e281ef0277469946",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "family": {
      "base": "AVR128DA28T-I",
      "siblings": [
        "AVR128DA28T-I/SS"
      ],
      "old_slug": "avr128da28t-i",
      "note": "renamed from the cut-base slug to the part it was built from (slug collision split, 2026-11-11)"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "SOIC-28-300mil",
      "Category": "Embedded Processors & Controllers",
      "Pins": "28"
    }
  },
  "variants": [
    {
      "mpn": "AVR128DA28T-II/SO",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/SO",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/SS",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/SS",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/SP",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/SP",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/RXB",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/PT",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/RXB",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/PT",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/6LX",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/6LX",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-II/MR",
      "kind": "packaging"
    },
    {
      "mpn": "AVR128DA28T-IE/MR",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "avr128da28t-i"
  ],
  "discovery_pitch": "AVR128DA28T-I (Microchip Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "avr128da28t-i.kicad_sym",
    "avr128da28t-i.kicad_mod",
    "avr128da28t-i.glb",
    "avr128da28t-i.step",
    "avr128da28t-i.lbr",
    "docs/hero.png",
    "docs/avr128da28t-i-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "avr128da28t-i-etched.glb",
    "avr128da28t-i-etched.step",
    "avr128da28t-i-so-hero.glb",
    "avr128da28t-i-so-hero.overlay.json"
  ],
  "visibility": "public",
  "updated_at": "2026-09-24T17:20:38.534Z",
  "description": "Microchip Tech Microcontrollers (MCU/MPU/SOC), SOIC-28-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}