# ATTINY806-SF

**Microchip Tech** · Pre-ordered MCUs · SOIC-20-300mil

ATTINY806-SF from Microchip Tech, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply pin; the operating supply voltage is 1.8 V to 5.5 V. |
| 2 | PA4 | bidirectional | General-purpose I/O pin PA4 with analog input AIN4, alternate USART0 XDIR, SPI0 SS, TCA0 WO4 and CCL LUT0-OUT functions. |
| 3 | PA5 | bidirectional | General-purpose I/O pin PA5 with analog input AIN5, AC0 OUT, TCA0 WO5 and CCL WO functions. |
| 4 | PA6 | bidirectional | General-purpose I/O pin PA6 with analog input AIN6 and analog comparator negative input AINN0. |
| 5 | PA7 | bidirectional | General-purpose I/O pin PA7 with analog input AIN7, analog comparator positive input AINP0 and CCL LUT1-OUT function. |
| 6 | PB5 | bidirectional | General-purpose I/O pin PB5 with CLKOUT, analog input AIN8, analog comparator positive input AINP1 and alternate TCA0 WO2 output. |
| 7 | PB4 | bidirectional | General-purpose I/O pin PB4 with analog input AIN9, analog comparator negative input AINN1, alternate TCA0 WO1 and CCL LUT0-OUT functions. |
| 8 | PB3 | bidirectional | General-purpose I/O pin PB3 with alternate USART0 RXD and TCA0 WO0 functions. |
| 9 | PB2 | bidirectional | General-purpose I/O pin PB2 with event output EVOUT1, USART0 TXD and TCA0 WO2 functions. |
| 10 | PB1 | bidirectional | General-purpose I/O pin PB1 with analog input AIN10, USART0 XCK, TWI0 SDA and TCA0 WO1 functions. |
| 11 | PB0 | bidirectional | General-purpose I/O pin PB0 with analog input AIN11, USART0 XDIR, TWI0 SCL and TCA0 WO0 functions. |
| 12 | PC0 | bidirectional | General-purpose I/O pin PC0 with alternate SPI0 SCK and TCA0 WO functions. |
| 13 | PC1 | bidirectional | General-purpose I/O pin PC1 with alternate SPI0 MISO and CCL LUT1-OUT functions. |
| 14 | PC2 | bidirectional | General-purpose I/O pin PC2 with event output EVOUT2 and alternate SPI0 MOSI function. |
| 15 | PC3 | bidirectional | General-purpose I/O pin PC3 with alternate SPI0 SS, TCA0 WO3 and CCL LUT1-IN0 functions. |
| 16 | PA0 | bidirectional | Reset/UPDI pin; the RSTPINCFG fuse selects GPIO, UPDI or RESET function, and it also carries analog input AIN0 and CCL LUT0-IN0. |
| 17 | PA1 | bidirectional | General-purpose I/O pin PA1 with analog input AIN1, alternate USART0 TXD, SPI0 MOSI and CCL LUT0-IN1 functions. |
| 18 | PA2 | bidirectional | General-purpose I/O pin PA2 with event output EVOUT0, analog input AIN2, alternate USART0 RXD and SPI0 MISO functions. |
| 19 | PA3 | bidirectional | General-purpose I/O pin PA3 that serves as the EXTCLK external clock input, with analog input AIN3, alternate USART0 XCK, SPI0 SCK and TCA0 WO3 functions. |
| 20 | GND | power_in | Ground reference pin for the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Embedded Processors & Controllers |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `ATTINY806-SF`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `attiny806-sf-etched.step` / `attiny806-sf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny806-sf.step` / `attiny806-sf.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Microchip Tech datasheet](docs/attiny806-sf-datasheet.pdf) (522 pp, sha256 `f5c03e904027d54c`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/attiny806-sf-datasheet.pdf)