ATtiny85

@@ -0,0 +1,55 @@+# ATtiny85++**Microchip Technology** · 8-bit AVR MCU · PDIP-8++8-bit AVR RISC microcontroller in a SOIC-8 (EIAJ 8S2) package, with 8 KB in-system programmable flash, 512 B EEPROM, and 512 B SRAM. Six I/O lines carry a 4-channel 10-bit ADC, two timer/counters with PWM, a USI for I2C/SPI, an analog comparator, and debugWIRE. It runs 2.7-5.5 V up to 20 MHz (1.8-5.5 V to 10 MHz on the V suffix). The default tiny MCU for small embedded tasks. Every pin is multiplexed; consult the pinout for alternate functions.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | PB5/PCINT5/RESET/ADC0/dW | bidirectional | 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. |+| 2 | PB3/PCINT3/XTAL1/CLKI/OC1B̄/ADC3 | bidirectional | 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. |+| 3 | PB4/PCINT4/XTAL2/CLKO/OC1B/ADC2 | bidirectional | 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. |+| 4 | GND | power_in | Ground reference (0 V). |+| 5 | PB0/MOSI/DI/SDA/AIN0/OC0A/OC1Ā/AREF/PCINT0 | bidirectional | 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. |+| 6 | PB1/MISO/DO/AIN1/OC0B/OC1A/PCINT1 | bidirectional | 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. |+| 7 | PB2/SCK/USCK/SCL/ADC1/T0/INT0/PCINT2 | bidirectional | 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. |+| 8 | VCC | power_in | 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. |++## Key specifications++| Parameter | Value |+|---|---|+| 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 |++## Ordering variants++- `ATtiny85-20SU (SOIC-8, 20 MHz)`+- `ATtiny85V-10SU (SOIC-8, 10 MHz, 1.8 V)`++## CAD (KiCad official)++- Symbol: `MCU_Microchip_ATtiny:ATtiny85-20S`+- Footprint: `Package_SO:SOIC-8_5.3x5.3mm_P1.27mm`+- 3D model: SOIC-8 wide / EIAJ (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip Technology datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet.pdf) (234 pp, sha256 `0e3fa6a7d608de9b`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/attiny85-datasheet.pdf)

@@ -0,0 +1,35 @@+{+  "slug": "attiny85",+  "version": "0.1.0",+  "type": "component",+  "description": "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.",+  "tags": [+    "component",+    "microcontroller",+    "avr",+    "attiny",+    "soic-8",+    "microchip"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "attiny85.kicad_sym",+    "attiny85.kicad_mod",+    "attiny85.glb",+    "docs/hero.png",+    "docs/attiny85-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file