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ATTINY3217-MN

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Microchip Tech Pre-ordered MCUs, HVQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ATTINY3217-MN

Microchip Tech · Pre-ordered MCUs · HVQFN-24-EP(4x4)

ATTINY3217-MN from Microchip Tech, in a HVQFN-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 General-purpose I/O PA2 with EVOUT0, ADC AIN2, USART0 RxD (alternate position), SPI0 MISO, TWI0 SCL (alternate position) and LUT0-IN2 functions.
2 PA3/EXTCLK bidirectional General-purpose I/O PA3 that also serves as the external clock input EXTCLK, with ADC AIN3, USART0 XCK (alternate), SPI0 SCK, TCA0 WO3 and TCB1 WO functions.
3 GND power_in Ground.
4 VDD power_in Input supply voltage; device operating range is 1.8 V to 5.5 V.
5 PA4 bidirectional General-purpose I/O PA4 with ADC0 AIN4, ADC1 AIN0, PTC X0/Y0, USART0 XDIR (alternate), SPI0 SS, TCA0 WO4, TCD0 WOA and LUT0-OUT functions.
6 PA5 bidirectional General-purpose I/O PA5 with external reference input VREFA, ADC AIN5/AIN1, PTC X1/Y1, AC0 OUT, TCA0 WO5, TCB0 WO and TCD0 WOB functions.
7 PA6 bidirectional General-purpose I/O PA6 with ADC AIN6/AIN2, PTC X2/Y2, analog comparator inputs/output, and DAC0 analog output OUT.
8 PA7 bidirectional General-purpose I/O PA7 with ADC AIN7/AIN3, PTC X3/Y3, analog comparator inputs and LUT1-OUT functions.
9 PB7 bidirectional General-purpose I/O PB7 with ADC1 AIN4 and analog comparator inputs AINN1/AINP3.
10 PB6 bidirectional General-purpose I/O PB6 with ADC1 AIN5 and analog comparator inputs AINP3/AINN1.
11 PB5 bidirectional General-purpose I/O PB5 with CLKOUT, ADC1 AIN8, PTC X12/Y12, analog comparator inputs and TCA0 WO2 (alternate) functions.
12 PB4 bidirectional General-purpose I/O PB4 with ADC1 AIN9, PTC X13/Y13, analog comparator inputs, TCA0 WO1 (alternate) and LUT0-OUT (alternate) functions.
13 PB3 bidirectional General-purpose I/O PB3 that also serves as 32.768 kHz crystal oscillator pin TOSC1, with AC OUT, USART0 RxD and TCA0 WO0 (alternate) functions.
14 PB2/TOSC2 bidirectional General-purpose I/O PB2 that also serves as 32.768 kHz crystal oscillator pin TOSC2, with EVOUT1, AC OUT, USART0 TxD and TCA0 WO2 functions.
15 PB1 bidirectional General-purpose I/O PB1 with ADC1 AIN10, PTC X4/Y4, analog comparator input, USART0 XCK, TWI0 SDA and TCA0 WO1 functions.
16 PB0 bidirectional General-purpose I/O PB0 with ADC1 AIN11, PTC X5/Y5, analog comparator inputs, USART0 XDIR, TWI0 SCL and TCA0 WO0 functions.
17 PC0 bidirectional General-purpose I/O PC0 with ADC1 AIN6, PTC X6/Y6, SPI0 SCK (alternate), TCB0 WO (alternate) and TCD0 WOC functions.
18 PC1 bidirectional General-purpose I/O PC1 with ADC1 AIN7, PTC X7/Y7, SPI0 MISO (alternate), TCD0 WOD and LUT1-OUT (alternate) functions.
19 PC2 bidirectional General-purpose I/O PC2 with EVOUT2, ADC1 AIN8, PTC X8/Y8 and SPI0 MOSI (alternate) functions.
20 PC3 bidirectional General-purpose I/O PC3 with ADC1 AIN9, PTC X9/Y9, SPI0 SS (alternate), TCA0 WO3 (alternate) and LUT1-IN0 functions.
21 PC4 bidirectional General-purpose I/O PC4 with ADC1 AIN10, PTC X10/Y10, TCA0 WO4 (alternate), TCB1 WO (alternate) and LUT1-IN1 functions.
22 PC5 bidirectional General-purpose I/O PC5 with ADC1 AIN11, PTC X11/Y11, TCA0 WO5 (alternate) and LUT1-IN2 functions.
23 PA0/RESET/UPDI bidirectional General-purpose I/O PA0 that is also the RESET input and the single-pin UPDI programming/debug interface, selected by the RSTPINCFG fuse; also ADC0 AIN0 and LUT0-IN0.
24 PA1 bidirectional General-purpose I/O PA1 with ADC AIN1, USART0 TxD (alternate), SPI0 MOSI, TWI0 SDA (alternate) and LUT0-IN1 functions.
25 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package HVQFN-24-EP(4x4)
Category Embedded Processors & Controllers
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 VDD 1.8 5.5 V ATtiny3217-MN ordering code 565
Operating temperature range -40 105 °C N = -40°C to +105°C 565
Max. CPU speed 20 MHz ATtiny3217-MN ordering code 565
TWI SCL low time, Standard mode TLOW_Sm 4700 ns specified minimum of the desired mode 366
TWI SCL low time, Fast mode TLOW_Fm 1300 ns specified minimum of the desired mode 366
TWI SCL low time, Fast mode Plus TLOW_Fm+ 500 ns specified minimum of the desired mode 366
Flash write/erase endurance 10000 cycles Write/erase endurance 1
EEPROM write/erase endurance 100000 cycles Write/erase endurance 1
Data retention 40 years at 55°C 1

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: ATTINY3217-MN
  • Footprint: Package_DFN_QFN:HVQFN-24-1EP_4x4mm_P0.5mm_EP2.1x2.1mm
  • 3D model: HVQFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: attiny3217-mn-etched.step / attiny3217-mn-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny3217-mn.step / attiny3217-mn.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (588 pp, sha256 7a52087b237a6923, 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