ATtiny85

{
  "schema_version": 1,
  "type": "component",
  "slug": "attiny85",
  "title": "ATtiny85",
  "brief": "Microchip 8-bit AVR MCU, SOIC-8. 8 KB flash, 512 B EEPROM/SRAM, 6 I/O, 10-bit ADC, up to 20 MHz. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "microcontroller",
    "avr",
    "attiny",
    "soic-8",
    "microchip"
  ],
  "component": {
    "mpn": "ATtiny85",
    "manufacturer": "Microchip Technology",
    "package": "SOIC-8 (EIAJ 8S2)",
    "pin_count": 8,
    "category": "Microcontroller",
    "subcategory": "8-bit AVR MCU",
    "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet.pdf",
    "parts": {
      "symbol": "attiny85.kicad_sym",
      "footprint": "attiny85.kicad_mod",
      "model_3d": "attiny85-etched.glb",
      "model_3d_plain": "attiny85.glb",
      "lbr": "attiny85.lbr",
      "model_3d_step": "attiny85-etched.step",
      "model_3d_step_plain": "attiny85.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "PB5/PCINT5/RESET/ADC0/dW",
        "type": "bidirectional",
        "description": "Port B bit 5. Multiplexed with active-low external RESET input, PCINT5 pin-change interrupt, ADC channel 0, and debugWIRE (dW) single-wire debug I/O. When the RSTDISBL fuse is programmed, it can serve as a (weak) I/O pin; otherwise it is the reset input."
      },
      {
        "number": "2",
        "name": "PB3/PCINT3/XTAL1/CLKI/OC1B̄/ADC3",
        "type": "bidirectional",
        "description": "Port B bit 3. Multiplexed with XTAL1 crystal oscillator input, external clock input (CLKI), inverted Timer/Counter1 output-compare B (/OC1B), ADC channel 3, and PCINT3 pin-change interrupt."
      },
      {
        "number": "3",
        "name": "PB4/PCINT4/XTAL2/CLKO/OC1B/ADC2",
        "type": "bidirectional",
        "description": "Port B bit 4. Multiplexed with XTAL2 crystal oscillator output, system clock output (CLKO), Timer/Counter1 output-compare B (OC1B), ADC channel 2, and PCINT4 pin-change interrupt."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V)."
      },
      {
        "number": "5",
        "name": "PB0/MOSI/DI/SDA/AIN0/OC0A/OC1Ā/AREF/PCINT0",
        "type": "bidirectional",
        "description": "Port B bit 0. Heavily multiplexed: SPI MOSI (programming), USI Data-Input (DI, three-wire) / SDA (I2C two-wire), analog comparator positive input (AIN0), Timer/Counter0 output-compare A (OC0A), inverted Timer/Counter1 output-compare A (/OC1A), external ADC voltage reference (AREF), and PCINT0 pin-change interrupt."
      },
      {
        "number": "6",
        "name": "PB1/MISO/DO/AIN1/OC0B/OC1A/PCINT1",
        "type": "bidirectional",
        "description": "Port B bit 1. Multiplexed with SPI MISO (programming), USI Data-Output (DO, three-wire), analog comparator negative input (AIN1), Timer/Counter0 output-compare B (OC0B), Timer/Counter1 output-compare A (OC1A), and PCINT1 pin-change interrupt."
      },
      {
        "number": "7",
        "name": "PB2/SCK/USCK/SCL/ADC1/T0/INT0/PCINT2",
        "type": "bidirectional",
        "description": "Port B bit 2. Multiplexed with SPI SCK (programming clock), USI clock (USCK three-wire) / SCL (I2C two-wire clock), ADC channel 1, Timer/Counter0 external clock input (T0), external interrupt 0 (INT0), and PCINT2 pin-change interrupt."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage. 2.7–5.5 V for ATtiny85 (0–20 MHz), 1.8–5.5 V for ATtiny85V (0–10 MHz). Decouple with a 100 nF ceramic close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet.pdf",
        "pages": 234,
        "sha256": "0e3fa6a7d608de9b",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "attiny85.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          5.3,
          2.16
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "121aee742692bb7bc9ef49972786ecb89d1b2d62ab089ed278651a884c800331",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "attiny85-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          5.3,
          2.16
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "01f9add39ac272cbe6de3ac120d68d20508fa8a14b1d123bab47fba969a1719e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "8-bit AVR RISC microcontroller",
      "Flash": "8 KB (in-system programmable)",
      "EEPROM": "512 B",
      "SRAM": "512 B",
      "I/O lines": "6",
      "ADC": "4-channel 10-bit",
      "Timers": "Two 8-bit with PWM",
      "Interfaces": "USI (I2C / SPI), debugWIRE",
      "Supply / clock": "2.7-5.5 V, 0-20 MHz",
      "Package": "SOIC-8 (EIAJ 8S2)",
      "Body (L×W×H)": "5.3 × 5.3 × 1.75 mm"
    }
  },
  "discovery_triggers": [
    "attiny85",
    "8-bit avr microcontroller",
    "attiny mcu soic-8",
    "small avr mcu"
  ],
  "discovery_pitch": "ATtiny85 8-bit AVR microcontroller (SOIC-8) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "attiny85.kicad_sym",
    "attiny85.kicad_mod",
    "attiny85.glb",
    "attiny85.lbr",
    "docs/hero.png",
    "docs/attiny85-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "attiny85-etched.step"
  ],
  "sections": [
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    "readme",
    "breadcrumbs",
    "info"
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}