# ATTINY416-MNR

**Microchip Tech** · Microcontrollers (MCU/MPU/SOC) · QFN-20-EP(3x3)

ATTINY416-MNR from Microchip Tech, in a QFN-20-EP(3x3). 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 | PA2 | bidirectional | GPIO pin PA2 (also AIN2, EVOUT0, RxD and MISO/SCL/WO2 alternate positions, LUT0-IN2); all pins can be used as event inputs and for external interrupt, and PA2 has full asynchronous detection. |
| 2 | PA3 | input | GPIO pin PA3, which serves as the EXTCLK external clock input (also AIN3, XCK, SCK and WO3 alternates); all pins can be used as event inputs and for external interrupt. |
| 3 | GND | power_in | Ground reference pin for the device. |
| 4 | VDD | power_in | Supply voltage pin; operating supply voltage is 1.8 V to 5.5 V. |
| 5 | PA4 | bidirectional | GPIO pin PA4 (also AIN4, XDIR, SS, WO4, WOA and LUT0-OUT alternates). |
| 6 | PA5 | bidirectional | GPIO pin PA5 (also AIN5, OUT, WO5 and WOB alternates). |
| 7 | PA6 | bidirectional | GPIO pin PA6 (also AIN6, AINN0 analog comparator negative input, OUT and MOSI alternate, and DAC0 OUT output on PA6). |
| 8 | PA7 | bidirectional | GPIO pin PA7 (also AIN7, AINP0 analog comparator positive input, MISO alternate, WO0 alternate, WOB and LUT1-OUT). |
| 9 | PB5 | bidirectional | GPIO pin PB5 (also CLKOUT, AIN8, AINP1 and WO2 alternate). |
| 10 | PB4 | bidirectional | GPIO pin PB4 (also AIN9, AINN1, WO1 alternate and LUT0-OUT alternate). |
| 11 | PB3 | passive | GPIO pin PB3, which serves as the TOSC1 32.768 kHz crystal oscillator connection (also RxD and WO0 alternates). |
| 12 | PB2 | passive | GPIO pin PB2, which serves as the TOSC2 32.768 kHz crystal oscillator connection (also EVOUT1, TxD and WO2). |
| 13 | PB1 | bidirectional | GPIO pin PB1 (also AIN10, XCK, SDA and WO1). |
| 14 | PB0 | bidirectional | GPIO pin PB0 (also AIN11, XDIR, SCL and WO0). |
| 15 | PC0 | bidirectional | GPIO pin PC0 (also SCK alternate, WO alternate and WOC). |
| 16 | PC1 | bidirectional | GPIO pin PC1 (also MISO alternate, WOD and LUT1-OUT alternate). |
| 17 | PC2 | bidirectional | GPIO pin PC2 (also EVOUT2 and MOSI alternate). |
| 18 | PC3 | bidirectional | GPIO pin PC3 (also SS alternate, WO3 alternate and LUT1-IN0). |
| 19 | PA0 | bidirectional | Multi-function pin PA0, used as GPIO or as the RESET/UPDI pin (RESET or UPDI selected by the RSTPINCFG fuse), also AIN0 and LUT0-IN0. |
| 20 | PA1 | bidirectional | GPIO pin PA1 (also AIN1, TxD, MOSI, SDA alternate and LUT0-IN1). |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | QFN-20-EP(3x3) |
| Category | Embedded Processors & Controllers |
| Pins | 21 |

## 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 range |  | 1.8 |  | 5.5 | V |  | 554 |
| Maximum CPU speed |  |  |  | 20 | MHz |  | 554 |
| Operating temperature range |  | -40 |  | 105 | °C |  | 554 |

## 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 | Pin Count Package Type Drawing Number Style 8 SOIC C04-00057 SN | 556 |

## CAD (KiCad official)

- Symbol: `ATTINY416-MNR`
- Footprint: `Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm`
- 3D model: QFN-20-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `attiny416-mnr-etched.step` / `attiny416-mnr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny416-mnr.step` / `attiny416-mnr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838388351168512) (585 pp, sha256 `fbb3d0e017d73ffc`, retrieved 2026-10-19, tier: lcsc)
- **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/attiny416-mnr-datasheet.pdf)