# ATTINY1617-MNR

**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · VQFN-24-EP(4x4)

ATTINY1617-MNR from Microchip Tech, in a VQFN-24-EP(4x4). 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 | Bidirectional GPIO PA2 that also serves as EVOUT0 event output, ADC0 AIN2, USART0 RxD, SPI0 MISO, TWI0 SCL and CCL LUT0-IN2 (USART and TWI are alternate pin positions selected via PORTMUX), with full asynchronous pin-change sensing. |
| 2 | PA3 | bidirectional | Bidirectional GPIO PA3 that also serves as the EXTCLK external clock input, ADC0 AIN3, USART0 XCK (alternate position), SPI0 SCK, TCA0 WO3 and TCB1 output. |
| 3 | GND | power_in | Ground reference for the device; the large center pad should also be soldered to ground for mechanical stability. |
| 4 | VDD | power_in | Supply voltage input for the device, with operating supply voltage specified as 1.8 V to 5.5 V. |
| 5 | PA4 | bidirectional | Bidirectional GPIO PA4 that also serves as ADC0 AIN4, AC0 AIN0, PTC X0/Y0, USART0 XDIR (alternate position), SPI0 SS, TCA0 WO4, TCD0 WOA and CCL LUT0-OUT. |
| 6 | PA5 | bidirectional | Bidirectional GPIO PA5 that also serves as the external voltage reference input VREFA, ADC0 AIN5, PTC X1/Y1, TCA0 WO5, TCB0 output and TCD0 WOB. |
| 7 | PA6 | bidirectional | Bidirectional GPIO PA6 that also serves as DAC0 analog output OUT, ADC0 AIN6, PTC X2/Y2 and AC inputs, with full asynchronous pin-change sensing. |
| 8 | PA7 | bidirectional | Bidirectional GPIO PA7 that also serves as ADC0 AIN7, PTC X3/Y3, AC0 AINP0 input and CCL LUT1-OUT. |
| 9 | PB7 | bidirectional | Bidirectional GPIO PB7 that also serves as ADC0 AIN4 and analog comparator inputs AINN1 and AINP3. |
| 10 | PB6 | bidirectional | Bidirectional GPIO PB6 that also serves as ADC0 AIN5 and analog comparator inputs AINP3 and AINN1, with full asynchronous pin-change sensing. |
| 11 | PB5 | bidirectional | Bidirectional GPIO PB5 that also serves as the CLKOUT clock output, ADC0 AIN8, PTC X12/Y12, analog comparator inputs AINP1/AINP2 and TCA0 WO2 (alternate position). |
| 12 | PB4 | bidirectional | Bidirectional GPIO PB4 that also serves as ADC0 AIN9, PTC X13/Y13, analog comparator inputs AINN1 and AINP3, TCA0 WO1 (alternate position) and CCL LUT0-OUT (alternate position). |
| 13 | PB3 | bidirectional | Bidirectional GPIO PB3 that also serves as the TOSC1 32.768 kHz crystal oscillator pin, AC0 OUT, USART0 RxD (alternate position) and TCA0 WO0 (alternate position). |
| 14 | PB2 | bidirectional | Bidirectional GPIO PB2 that also serves as the TOSC2 32.768 kHz crystal oscillator pin, EVOUT1 event output, AC0 OUT, USART0 TxD and TCA0 WO2, with full asynchronous pin-change sensing. |
| 15 | PB1 | bidirectional | Bidirectional GPIO PB1 that also serves as ADC0 AIN10, PTC X4/Y4, analog comparator input AINP2, USART0 XCK, TWI0 SDA and TCA0 WO1. |
| 16 | PB0 | bidirectional | Bidirectional GPIO PB0 that also serves as ADC0 AIN11, PTC X5/Y5, analog comparator inputs AINP2/AINP1, USART0 XDIR, TWI0 SCL and TCA0 WO0. |
| 17 | PC0 | bidirectional | Bidirectional GPIO PC0 that also serves as ADC0 AIN6, PTC X6/Y6, SPI0 SCK (alternate position), TCB0 output, TCA0 WO (alternate position) and TCD0 WOC. |
| 18 | PC1 | bidirectional | Bidirectional GPIO PC1 that also serves as ADC0 AIN7, PTC X7/Y7, SPI0 MISO (alternate position), TCD0 WOD and CCL LUT1-OUT (alternate position). |
| 19 | PC2 | bidirectional | Bidirectional GPIO PC2 that also serves as EVOUT2 event output, ADC0 AIN8, PTC X8/Y8 and SPI0 MOSI (alternate position), with full asynchronous pin-change sensing. |
| 20 | PC3 | bidirectional | Bidirectional GPIO PC3 that also serves as ADC0 AIN9, PTC X9/Y9, SPI0 SS (alternate position), TCA0 WO3 (alternate position) and CCL LUT1-IN0. |
| 21 | PC4 | bidirectional | Bidirectional GPIO PC4 that also serves as ADC0 AIN10, PTC X10/Y10, TCA0 WO4 (alternate position), TCB1 output, TCD0 WO (alternate position) and CCL LUT1-IN1. |
| 22 | PC5 | bidirectional | Bidirectional GPIO PC5 that also serves as ADC0 AIN11, PTC X11/Y11, TCA0 WO5 (alternate position) and CCL LUT1-IN2. |
| 23 | PA0 | bidirectional | Bidirectional GPIO PA0 that is shared with the RESET/UPDI pin, whose function is selected by the RSTPINCFG fuse, and also serves as ADC0 AIN0 and CCL LUT0-IN0. |
| 24 | PA1 | bidirectional | Bidirectional GPIO PA1 that also serves as ADC0 AIN1, USART0 TxD (alternate position), SPI0 MOSI, TWI0 SDA (alternate position) and CCL LUT0-IN1. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | VQFN-24-EP(4x4) |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 25 |

## 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 |  | 1.8 |  | 5.5 | V | Ordering table row for ATtiny1617-MNR (20 MHz grade, VQFN) | 566 |
| Max. CPU Speed |  |  |  | 20 | MHz | Ordering table row for ATtiny1617-MNR (1.8 V to 5.5 V, VQFN) | 566 |
| Temperature Range |  | -40 |  | 105 | °C | Ordering table row for ATtiny1617-MNR (-MN R = -40 °C to +105 °C) | 566 |

## 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 | including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In the Self Capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor. | 461 |

## CAD (KiCad official)

- Symbol: `ATTINY1617-MNR`
- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm`
- 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `attiny1617-mnr-etched.step` / `attiny1617-mnr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny1617-mnr.step` / `attiny1617-mnr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/attiny1617-mnr-datasheet.pdf) (598 pp, sha256 `382df42b05acd53e`, retrieved 2026-11-05, 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/attiny1617-mnr-datasheet.pdf)