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ATTINY3216-SF

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Microchip Tech Pre-ordered MCUs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ATTINY3216-SF

Microchip Tech · Pre-ordered MCUs · SOIC-20-300mil

ATTINY3216-SF 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 Input supply pin; the device operates from 1.8V to 5.5V (2.7V to 5.5V for the -F 125°C grade).
2 PA4 bidirectional PORTA pin 4 with ADC0 AIN4, ADC1 AIN0, PTC X0/Y0, USART0 XDIR (alt), SPI0 SS, TCA0 WO4, TCD0 WOA and CCL LUT0-OUT.
3 PA5 bidirectional PORTA pin 5 with external reference VREFA, ADC0 AIN5, ADC1 AIN1, PTC X1/Y1, TCA0 WO5, TCB0 WO and TCD0 WOB.
4 PA6 bidirectional PORTA pin 6 with ADC0 AIN6, ADC1 AIN2, PTC X2/Y2, analog comparator inputs and DAC0 OUT.
5 PA7 bidirectional PORTA pin 7 with ADC0 AIN7, ADC1 AIN3, PTC X3/Y3, analog comparator inputs and CCL LUT1-OUT.
6 PB5 bidirectional PORTB pin 5 with CLKOUT, ADC1 AIN8, PTC X12/Y12, analog comparator inputs and TCA0 WO2 (alt).
7 PB4 bidirectional PORTB pin 4 with ADC1 AIN9, PTC X13/Y13, analog comparator inputs, TCA0 WO1 (alt) and LUT0-OUT (alt).
8 PB3 bidirectional PORTB pin 3 / TOSC1 crystal oscillator pin, with USART0 RxD and TCA0 WO0 (alt).
9 PB2 bidirectional PORTB pin 2 / TOSC2 crystal oscillator pin, with EVOUT1, USART0 TxD and TCA0 WO2.
10 PB1 bidirectional PORTB pin 1 with ADC1 AIN10, PTC X4/Y4, USART0 XCK, TWI0 SDA and TCA0 WO1.
11 PB0 bidirectional PORTB pin 0 with ADC1 AIN11, PTC X5/Y5, USART0 XDIR, TWI0 SCL and TCA0 WO0.
12 PC0 bidirectional PORTC pin 0 with ADC1 AIN6, PTC X6/Y6, SPI0 SCK (alt), TCB0 WO (alt) and TCD0 WOC.
13 PC1 bidirectional PORTC pin 1 with ADC1 AIN7, PTC X7/Y7, SPI0 MISO (alt), TCD0 WOD and LUT1-OUT (alt).
14 PC2 bidirectional PORTC pin 2 with EVOUT2, ADC1 AIN8, PTC X8/Y8 and SPI0 MOSI (alt).
15 PC3 bidirectional PORTC pin 3 with ADC1 AIN9, PTC X9/Y9, SPI0 SS (alt), TCA0 WO3 (alt) and CCL LUT1-IN0.
16 PA0/RESET/UPDI bidirectional PORTA pin 0 configurable as GPIO, RESET or the single-pin UPDI programming/debug interface, with ADC0 AIN0 and CCL LUT0-IN0.
17 PA1 bidirectional PORTA pin 1 with ADC0 AIN1, USART0 TxD (alt), SPI0 MOSI, TWI0 SDA (alt) and CCL LUT0-IN1.
18 PA2 bidirectional PORTA pin 2 with EVOUT0, ADC0 AIN2, USART0 RxD (alt), SPI0 MISO, TWI0 SCL (alt) and CCL LUT0-IN2.
19 PA3/EXTCLK bidirectional PORTA pin 3 / external clock input, with ADC0 AIN3, USART0 XCK (alt), SPI0 SCK, TCA0 WO3 and TCB1 WO.
20 GND power_in Ground.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-20-300mil
Category Embedded Processors & Controllers
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 VDD 2.7 5.5 V ATtiny3216-SF ordering option 565
Max. CPU speed 16 MHz ATtiny3216-SF ordering option 565
Operating temperature range -40 125 °C F = -40°C to +125°C 565

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. 460

CAD (KiCad official)

  • Symbol: ATTINY3216-SF
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: attiny3216-sf-etched.step / attiny3216-sf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny3216-sf.step / attiny3216-sf.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (588 pp, sha256 552d725ac87bb1f3, retrieved 2026-10-23, 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