# ATTINY806-SFR

**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · SOIC-20-300mil

ATTINY806-SFR 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 for the device (VDD). |
| 2 | PA4 | bidirectional | General-purpose I/O pin PA4, multiplexed with AIN4, XDIR, SS, WO4 and LUT0-OUT. |
| 3 | PA5 | bidirectional | General-purpose I/O pin PA5, multiplexed with AIN5, OUT, WO5 and WO. |
| 4 | PA6 | bidirectional | General-purpose I/O pin PA6, multiplexed with AIN6 and AINN0. |
| 5 | PA7 | bidirectional | General-purpose I/O pin PA7, multiplexed with AIN7, AINP0 and LUT1-OUT. |
| 6 | PB5 | bidirectional | General-purpose I/O pin PB5, multiplexed with CLKOUT, AIN8, AINP1 and WO2 (alternate position). |
| 7 | PB4 | bidirectional | General-purpose I/O pin PB4, multiplexed with AIN9, AINN1, WO1 and LUT0-OUT (alternate positions). |
| 8 | PB3 | bidirectional | General-purpose I/O pin PB3, multiplexed with RxD and WO0 (alternate position). |
| 9 | PB2 | bidirectional | General-purpose I/O pin PB2, multiplexed with EVOUT1, TxD and WO2. |
| 10 | PB1 | bidirectional | General-purpose I/O pin PB1, multiplexed with AIN10, XCK, SDA and WO1. |
| 11 | PB0 | bidirectional | General-purpose I/O pin PB0, multiplexed with AIN11, XDIR, SCL and WO0. |
| 12 | PC0 | bidirectional | General-purpose I/O pin PC0, multiplexed with SCK (alternate position) and WO (alternate position). |
| 13 | PC1 | bidirectional | General-purpose I/O pin PC1, multiplexed with MISO (alternate position) and LUT1-OUT (alternate position). |
| 14 | PC2 | bidirectional | General-purpose I/O pin PC2, multiplexed with EVOUT2 and MOSI (alternate position). |
| 15 | PC3 | bidirectional | General-purpose I/O pin PC3, multiplexed with SS (alternate position), WO3 (alternate position) and LUT1-IN0. |
| 16 | PA0 | bidirectional | PA0 is the RESET/UPDI pin, multiplexed with AIN0 and LUT0-IN0; its function depends on the RSTPINCFG fuse setting. |
| 17 | PA1 | bidirectional | General-purpose I/O pin PA1, multiplexed with AIN1, TxD (alternate position), MOSI and LUT0-IN1. |
| 18 | PA2 | bidirectional | General-purpose I/O pin PA2, multiplexed with EVOUT0, AIN2, RxD (alternate position), MISO and LUT0-IN2. |
| 19 | PA3 | bidirectional | General-purpose I/O pin PA3, multiplexed with EXTCLK, AIN3, XCK (alternate position), SCK and WO3. |
| 20 | GND | power_in | Ground reference pin for the device (GND). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 20 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage |  | 2.7 |  | 5.5 | V | ATtiny806-SFR ordering row, 16 MHz SOIC -40°C to +125°C | 493 |
| Operating temperature range |  | -40 |  | 125 | °C | ATtiny806-SFR ordering row, SOIC, 2.7V to 5.5V | 493 |
| Maximum CPU speed |  |  |  | 16 | MHz | ATtiny806-SFR ordering row, supply 2.7V to 5.5V | 493 |

## CAD (KiCad official)

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

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/attiny806-sfr-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-sfr-datasheet.pdf)