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ATTINY3216-SNR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ATTINY3216-SNR
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · SOIC-20-300mil
ATTINY3216-SNR 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 | Positive supply input for the device, operating range 2.7V to 5.5V. |
| 2 | PA4 | bidirectional | General-purpose I/O PA4 with ADC0 AIN4, ADC1 AIN0, PTC X0/Y0, TCA0 WO4, TCD0 WOA, SPI0 SS, USART0 XDIR (alternate) and CCL LUT0-OUT functions. |
| 3 | PA5 | bidirectional | General-purpose I/O PA5 with external reference input VREFA, ADC0 AIN5, ADC1 AIN1, PTC X1/Y1, TCA0 WO5, TCB0 WO and TCD0 WOB functions. |
| 4 | PA6 | bidirectional | General-purpose I/O PA6 with ADC0 AIN6, ADC1 AIN2, PTC X2/Y2, analog comparator inputs and the DAC0 analog output. |
| 5 | PA7 | bidirectional | General-purpose I/O PA7 with ADC0 AIN7, ADC1 AIN3, PTC X3/Y3, analog comparator inputs and CCL LUT1-OUT functions. |
| 6 | PB5 | bidirectional | General-purpose I/O PB5 with CLKOUT, ADC0 AIN8, PTC X12/Y12, analog comparator input and TCA0 WO2 (alternate) functions. |
| 7 | PB4 | bidirectional | General-purpose I/O PB4 with ADC0 AIN9, PTC X13/Y13, analog comparator inputs, TCA0 WO1 (alternate) and LUT0-OUT (alternate) functions. |
| 8 | PB3 | bidirectional | General-purpose I/O PB3 that also serves as the TOSC1 32.768 kHz crystal oscillator pin, with USART0 RxD and TCA0 WO0 (alternate) functions. |
| 9 | PB2/TOSC2 | bidirectional | General-purpose I/O PB2 that also serves as the TOSC2 32.768 kHz crystal oscillator pin, with EVOUT1, USART0 TxD and TCA0 WO2 functions. |
| 10 | PB1 | bidirectional | General-purpose I/O PB1 with ADC AIN10, PTC X4/Y4, analog comparator input, USART0 XCK, TWI0 SDA and TCA0 WO1 functions. |
| 11 | PB0 | bidirectional | General-purpose I/O PB0 with ADC AIN11, PTC X5/Y5, analog comparator inputs, USART0 XDIR, TWI0 SCL and TCA0 WO0 functions. |
| 12 | PC0 | bidirectional | General-purpose I/O PC0 with ADC AIN6, PTC X6/Y6, SPI0 SCK (alternate), TCB0 WO (alternate) and TCD0 WOC functions. |
| 13 | PC1 | bidirectional | General-purpose I/O PC1 with ADC AIN7, PTC X7/Y7, SPI0 MISO (alternate), TCD0 WOD and LUT1-OUT (alternate) functions. |
| 14 | PC2 | bidirectional | General-purpose I/O PC2 with EVOUT2, ADC AIN8, PTC X8/Y8 and SPI0 MOSI (alternate) functions. |
| 15 | PC3 | bidirectional | General-purpose I/O PC3 with ADC AIN9, PTC X9/Y9, SPI0 SS (alternate), TCA0 WO3 (alternate) and CCL LUT1-IN0 functions. |
| 16 | PA0/RESET/UPDI | bidirectional | General-purpose I/O PA0 that is configurable by fuse as the RESET input or the single-pin UPDI program/debug interface, with ADC0 AIN0 and CCL LUT0-IN0 functions. |
| 17 | PA1 | bidirectional | General-purpose I/O PA1 with ADC0 AIN1, SPI0 MOSI, USART0 TxD and TWI0 SDA (alternate positions) and CCL LUT0-IN1 functions. |
| 18 | PA2 | bidirectional | General-purpose I/O PA2 with EVOUT0, ADC0 AIN2, SPI0 MISO, USART0 RxD and TWI0 SCL (alternate positions) and CCL LUT0-IN2 functions. |
| 19 | PA3/EXTCLK | bidirectional | General-purpose I/O PA3 that also serves as the external clock input EXTCLK, with ADC0 AIN3, SPI0 SCK, TCA0 WO3 and TCB1 WO functions. |
| 20 | GND | power_in | Ground reference for the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Embedded Processors & Controllers |
| Pins | 20 |
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. | 458 |
CAD (KiCad official)
- Symbol:
ATTINY3216-SNR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
attiny3216-snr-etched.step/attiny3216-snr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);attiny3216-snr.step/attiny3216-snr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (572 pp, sha256
97cb689010a2d3b4, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).
# ATTINY3216-SNR
**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · SOIC-20-300mil
ATTINY3216-SNR 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 | Positive supply input for the device, operating range 2.7V to 5.5V. |
| 2 | PA4 | bidirectional | General-purpose I/O PA4 with ADC0 AIN4, ADC1 AIN0, PTC X0/Y0, TCA0 WO4, TCD0 WOA, SPI0 SS, USART0 XDIR (alternate) and CCL LUT0-OUT functions. |
| 3 | PA5 | bidirectional | General-purpose I/O PA5 with external reference input VREFA, ADC0 AIN5, ADC1 AIN1, PTC X1/Y1, TCA0 WO5, TCB0 WO and TCD0 WOB functions. |
| 4 | PA6 | bidirectional | General-purpose I/O PA6 with ADC0 AIN6, ADC1 AIN2, PTC X2/Y2, analog comparator inputs and the DAC0 analog output. |
| 5 | PA7 | bidirectional | General-purpose I/O PA7 with ADC0 AIN7, ADC1 AIN3, PTC X3/Y3, analog comparator inputs and CCL LUT1-OUT functions. |
| 6 | PB5 | bidirectional | General-purpose I/O PB5 with CLKOUT, ADC0 AIN8, PTC X12/Y12, analog comparator input and TCA0 WO2 (alternate) functions. |
| 7 | PB4 | bidirectional | General-purpose I/O PB4 with ADC0 AIN9, PTC X13/Y13, analog comparator inputs, TCA0 WO1 (alternate) and LUT0-OUT (alternate) functions. |
| 8 | PB3 | bidirectional | General-purpose I/O PB3 that also serves as the TOSC1 32.768 kHz crystal oscillator pin, with USART0 RxD and TCA0 WO0 (alternate) functions. |
| 9 | PB2/TOSC2 | bidirectional | General-purpose I/O PB2 that also serves as the TOSC2 32.768 kHz crystal oscillator pin, with EVOUT1, USART0 TxD and TCA0 WO2 functions. |
| 10 | PB1 | bidirectional | General-purpose I/O PB1 with ADC AIN10, PTC X4/Y4, analog comparator input, USART0 XCK, TWI0 SDA and TCA0 WO1 functions. |
| 11 | PB0 | bidirectional | General-purpose I/O PB0 with ADC AIN11, PTC X5/Y5, analog comparator inputs, USART0 XDIR, TWI0 SCL and TCA0 WO0 functions. |
| 12 | PC0 | bidirectional | General-purpose I/O PC0 with ADC AIN6, PTC X6/Y6, SPI0 SCK (alternate), TCB0 WO (alternate) and TCD0 WOC functions. |
| 13 | PC1 | bidirectional | General-purpose I/O PC1 with ADC AIN7, PTC X7/Y7, SPI0 MISO (alternate), TCD0 WOD and LUT1-OUT (alternate) functions. |
| 14 | PC2 | bidirectional | General-purpose I/O PC2 with EVOUT2, ADC AIN8, PTC X8/Y8 and SPI0 MOSI (alternate) functions. |
| 15 | PC3 | bidirectional | General-purpose I/O PC3 with ADC AIN9, PTC X9/Y9, SPI0 SS (alternate), TCA0 WO3 (alternate) and CCL LUT1-IN0 functions. |
| 16 | PA0/RESET/UPDI | bidirectional | General-purpose I/O PA0 that is configurable by fuse as the RESET input or the single-pin UPDI program/debug interface, with ADC0 AIN0 and CCL LUT0-IN0 functions. |
| 17 | PA1 | bidirectional | General-purpose I/O PA1 with ADC0 AIN1, SPI0 MOSI, USART0 TxD and TWI0 SDA (alternate positions) and CCL LUT0-IN1 functions. |
| 18 | PA2 | bidirectional | General-purpose I/O PA2 with EVOUT0, ADC0 AIN2, SPI0 MISO, USART0 RxD and TWI0 SCL (alternate positions) and CCL LUT0-IN2 functions. |
| 19 | PA3/EXTCLK | bidirectional | General-purpose I/O PA3 that also serves as the external clock input EXTCLK, with ADC0 AIN3, SPI0 SCK, TCA0 WO3 and TCB1 WO functions. |
| 20 | GND | power_in | Ground reference for the device. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Embedded Processors & Controllers |
| Pins | 20 |
## 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. | 458 |
## CAD (KiCad official)
- Symbol: `ATTINY3216-SNR`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `attiny3216-snr-etched.step` / `attiny3216-snr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny3216-snr.step` / `attiny3216-snr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](docs/attiny3216-snr-datasheet.pdf) (572 pp, sha256 `97cb689010a2d3b4`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/attiny3216-snr-datasheet.pdf)