# ATTINY814-SSFR

**Microchip Tech** · Pre-ordered MCUs · SOIC-14

ATTINY814-SSFR from Microchip Tech, in a SOIC-14. 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 | Supply voltage pin for the device, which operates from 1.8V to 5.5V. |
| 2 | PA4 | bidirectional | General purpose I/O pin of PORTA with analog input AIN4 and X0/Y0 touch line, alternate functions include XDIR, SS, WO4, WOA and LUT0-OUT. |
| 3 | PA5 | bidirectional | General purpose I/O pin of PORTA with analog input AIN5 and X1/Y1 touch line, alternate functions include OUT, WO5 and WOB. |
| 4 | PA6 | bidirectional | General purpose I/O pin of PORTA with analog input AIN6, X2/Y2 touch line and AINN0; the DAC output OUT is also on this pin. |
| 5 | PA7 | bidirectional | General purpose I/O pin of PORTA with analog input AIN7, X3/Y3 touch line, AINP0 and LUT1-OUT alternate function. |
| 6 | PB3 | bidirectional | General purpose I/O pin of PORTB; alternate functions are TOSC1 (crystal oscillator input), RxD and WO0 per the multiplexing table. |
| 7 | PB2 | bidirectional | General purpose I/O pin of PORTB; alternate functions are TOSC2 (crystal oscillator output), EVOUT1, TxD and WO2. |
| 8 | PB1 | bidirectional | General purpose I/O pin of PORTB with analog input AIN10 and X4/Y4 touch line, alternate functions include XCK, SDA and WO1. |
| 9 | PB0 | bidirectional | General purpose I/O pin of PORTB with analog input AIN11 and X5/Y5 touch line, alternate functions include XDIR, SCL and WO0. |
| 10 | PA0 | bidirectional | General purpose I/O pin of PORTA that can be configured as RESET or UPDI programming/debug pin via RSTPINCFG fuses, with analog input AIN0 and LUT0-IN0. |
| 11 | PA1 | bidirectional | General purpose I/O pin of PORTA with analog input AIN1, alternate functions include BREAK, TXD, MOSI, SDA, and LUT0-IN1. |
| 12 | PA2 | bidirectional | General purpose I/O pin of PORTA with analog input AIN2, alternate functions include EVOUT0, RxD, MISO, SCL and LUT0-IN2. |
| 13 | PA3 | bidirectional | General purpose I/O pin of PORTA with analog input AIN3, alternate functions include EXTCLK, XCK, SCK and WO3. |
| 14 | GND | power_in | Ground reference pin for the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-14 |
| Category | Embedded Processors & Controllers |
| Pins | 14 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply operational range |  | 1.8 |  | 5.5 | V | ATtiny814-SSFR, Industrial (-40°C to +125°C), Tape & Reel | 12 |
| Operating temperature range (Industrial, SSFR) |  | -40 |  | 125 | °C | ATtiny814-SSFR ordering code, Industrial grade | 12 |
| Maximum frequency, speed grade 1 |  | 0 |  | 5 | MHz | @ 1.8V, 5.5V | 2 |
| Maximum frequency, speed grade 2 |  | 0 |  | 10 | MHz | @ 2.7V, 5.5V | 2 |
| Maximum frequency, speed grade 3 |  | 0 |  | 20 | MHz | @ 4.5V, 5.5V | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | configurations, including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. | 382 |

## CAD (KiCad official)

- Symbol: `ATTINY814-SSFR`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `attiny814-ssfr-etched.step` / `attiny814-ssfr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny814-ssfr.step` / `attiny814-ssfr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/attiny814-ssfr-datasheet.pdf) (497 pp, sha256 `e3a6ce144ee6db81`, retrieved 2026-10-30, 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/attiny814-ssfr-datasheet.pdf)