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ATSAMD21J17A-AU

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatsamd21j17a-aufactory-2.0.0extractor-text

Verified ATSAMD21J17A-AU

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30 Oct 2026RayPublished by the parts factory: tier mfr, 64 pinsfiles match
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  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATSAMD21J17A-AU · TQFP-64(10x10) · 64 pins
  • ✓copper: 64 copper pads, none touching another net
  • ✓datasheet: all 64 pin names found in the 1115-page datasheet
  • ✓distributor: lcsc C1527378, digikey ATSAMD21J17A-AU-ND, mouser 556-ATSAMD21J17A-AU
  • ✓family: TQFP-64_10x10mm_P0.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-w4qy_97i/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 64 pins = 64 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 64 pins agree
  • ✓visibility: public, source open
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Verified files✓ atsamd21j17a-au.kicad_sym✓ atsamd21j17a-au.kicad_mod✓ atsamd21j17a-au.step
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verification.json Verified: Published by the parts factory: tier mfr, 64 pins · Ray 5d ago

ATSAMD21J17A-AU

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-64(10x10)

ATSAMD21J17A-AU from Microchip Tech, in a TQFP-64(10x10). 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 PA00 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[0], SERCOM1/PAD[0], TCC2/WO[0]; also XIN32 for the 32kHz crystal oscillator.
2 PA01 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[1], SERCOM1/PAD[1], TCC2/WO[1]; also XOUT32 for the 32kHz crystal oscillator.
3 PA02 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[2], ADC AIN[0], PTC Y[0], DAC VOUT, TCC3/WO[0].
4 PA03 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[3], ADC/DAC VREFA, ADC AIN[1], PTC Y[1], TCC3/WO[1].
5 PB04 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[4], ADC AIN[12], PTC Y[10].
6 PB05 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[5], ADC AIN[13], PTC Y[11].
7 GNDANA power_in Ground for the analog power domain.
8 VDDANA power_in Analog supply, 1.62V to 3.63V, with 100nF and 10µF decoupling recommended.
9 PB06 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[6], ADC AIN[14], PTC Y[12].
10 PB07 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[7], ADC AIN[15], PTC Y[13].
11 PB08 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[8], ADC AIN[2], PTC Y[14], SERCOM4/PAD[0], TC4/WO[0], TCC3/WO[6].
12 PB09 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[9], ADC AIN[3], PTC Y[15], SERCOM4/PAD[1], TC4/WO[1], TCC3/WO[7].
13 PA04 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[4], ADC/VREFB, ADC AIN[4], AC AIN[0], PTC Y[2], SERCOM0/PAD[0], TCC0/WO[0], TCC3/WO[2].
14 PA05 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[5], ADC AIN[5], AC AIN[1], PTC Y[3], SERCOM0/PAD[1], TCC0/WO[1], TCC3/WO[3].
15 PA06 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[6], ADC AIN[6], AC AIN[2], PTC Y[4], SERCOM0/PAD[2], TCC1/WO[0], TCC3/WO[4].
16 PA07 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[7], ADC AIN[7], AC AIN[3], PTC Y[5], SERCOM0/PAD[3], TCC1/WO[1], TCC3/WO[5], I2S/SD[0].
17 PA08 bidirectional General-purpose I/O (VDDIO domain) with NMI, ADC AIN[16], PTC X[0], SERCOM0/PAD[0], SERCOM2/PAD[0], TCC0/WO[0], TCC1/WO[2], I2S/SD[1]; supports I2C Hs mode.
18 PA09 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[9], ADC AIN[17], PTC X[1], SERCOM0/PAD[1], SERCOM2/PAD[1], TCC0/WO[1], TCC1/WO[3], I2S/MCK[0]; supports I2C Hs mode.
19 PA10 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[10], ADC AIN[18], PTC X[2], SERCOM0/PAD[2], SERCOM2/PAD[2], TCC1/WO[0], TCC0/WO[2], I2S/SCK[0], GCLK_IO[4].
20 PA11 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[11], ADC AIN[19], PTC X[3], SERCOM0/PAD[3], SERCOM2/PAD[3], TCC1/WO[1], TCC0/WO[3], I2S/FS[0], GCLK_IO[5].
21 VDDIO power_in Digital I/O supply, 1.62V to 3.63V, with 100nF and 10µF decoupling recommended.
22 GND power_in Digital ground.
23 PB10 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[10], SERCOM4/PAD[2], TC5/WO[0], TCC0/WO[4], I2S/MCK[1], GCLK_IO[4].
24 PB11 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[11], SERCOM4/PAD[3], TC5/WO[1], TCC0/WO[5], I2S/SCK[1], GCLK_IO[5].
25 PB12 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[12], PTC X[12], SERCOM4/PAD[0], TC4/WO[0], TCC0/WO[6], I2S/FS[1], GCLK_IO[6]; supports I2C Hs mode.
26 PB13 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[13], PTC X[13], SERCOM4/PAD[1], TC4/WO[1], TCC0/WO[7], GCLK_IO[7]; supports I2C Hs mode.
27 PB14 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[14], PTC X[14], SERCOM4/PAD[2], TC5/WO[0], GCLK_IO[0].
28 PB15 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[15], PTC X[15], SERCOM4/PAD[3], TC5/WO[1], GCLK_IO[1].
29 PA12 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[12], SERCOM2/PAD[0], SERCOM4/PAD[0], TCC2/WO[0], TCC0/WO[6], AC/CMP[0]; supports I2C Hs mode.
30 PA13 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[13], SERCOM2/PAD[1], SERCOM4/PAD[1], TCC2/WO[1], TCC0/WO[7], AC/CMP[1]; supports I2C Hs mode.
31 PA14 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[14], SERCOM2/PAD[2], SERCOM4/PAD[2], TC3/WO[0], TCC0/WO[4], GCLK_IO[0]; also XIN for the crystal oscillator.
32 PA15 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[15], SERCOM2/PAD[3], SERCOM4/PAD[3], TC3/WO[1], TCC0/WO[5], GCLK_IO[1]; also XOUT for the crystal oscillator.
33 GND power_in Digital ground.
34 VDDIO power_in Digital I/O supply, 1.62V to 3.63V, with 100nF and 10µF decoupling recommended.
35 PA16 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[0], PTC X[4], SERCOM1/PAD[0], SERCOM3/PAD[0], TCC2/WO[0], TCC0/WO[6], GCLK_IO[2]; supports I2C Hs mode.
36 PA17 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[1], PTC X[5], SERCOM1/PAD[1], SERCOM3/PAD[1], TCC2/WO[1], TCC0/WO[7], GCLK_IO[3]; supports I2C Hs mode.
37 PA18 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[2], PTC X[6], SERCOM1/PAD[2], SERCOM3/PAD[2], TC3/WO[0], TCC0/WO[2], AC/CMP[0].
38 PA19 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[3], PTC X[7], SERCOM1/PAD[3], SERCOM3/PAD[3], TC3/WO[1], TCC0/WO[3], I2S/SD[0], AC/CMP[1].
39 PB16 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[0], SERCOM5/PAD[0], TC6/WO[0], TCC0/WO[4], I2S/SD[1], GCLK_IO[2]; supports I2C Hs mode.
40 PB17 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[1], SERCOM5/PAD[1], TC6/WO[1], TCC0/WO[5], I2S/MCK[0], GCLK_IO[3]; supports I2C Hs mode.
41 PA20 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[4], PTC X[8], SERCOM5/PAD[2], SERCOM3/PAD[2], TC7/WO[0], TCC0/WO[6], I2S/SCK[0], GCLK_IO[4].
42 PA21 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[5], PTC X[9], SERCOM5/PAD[3], SERCOM3/PAD[3], TC7/WO[1], TCC0/WO[7], I2S/FS[0], GCLK_IO[5].
43 PA22 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[6], PTC X[10], SERCOM3/PAD[0], SERCOM5/PAD[0], TC4/WO[0], TCC0/WO[4], GCLK_IO[6]; supports I2C Hs mode.
44 PA23 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[7], PTC X[11], SERCOM3/PAD[1], SERCOM5/PAD[1], TC4/WO[1], TCC0/WO[5], USB SOF 1kHz, GCLK_IO[7]; supports I2C Hs mode.
45 PA24 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[12], SERCOM3/PAD[2], SERCOM5/PAD[2], TC5/WO[0], TCC1/WO[2], USB DM; enable a pull-up if unconnected.
46 PA25 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[13], SERCOM3/PAD[3], SERCOM5/PAD[3], TC5/WO[1], TCC1/WO[3], USB DP; enable a pull-up if unconnected.
47 GND power_in Digital ground.
48 VDDIO power_in Digital I/O supply, 1.62V to 3.63V, with 100nF and 10µF decoupling recommended.
49 PB22 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[6], SERCOM5/PAD[2], TC7/WO[0], TCC3/WO[0], GCLK_IO[0].
50 PB23 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[7], SERCOM5/PAD[3], TC7/WO[1], TCC3/WO[1], GCLK_IO[1].
51 PA27 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[15], TCC3/WO[6], GCLK_IO[0].
52 RESET input External reset input (RESETN), active low, with internal pull-up; reset low threshold below 0.33VDDIO for VDDIO 1.6V-2.0V and below 0.36VDDIO for 2.7V-3.6V.
53 PA28 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[8], TCC3/WO[7], GCLK_IO[0].
54 GND power_in Digital ground.
55 VDDCORE power_out Regulated core supply output (1.6V to 1.8V) requiring external 1µF decoupling capacitor.
56 VDDIN power_in Input supply for the internal voltage regulator, 1.62V to 3.63V.
57 PA30 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[10], SERCOM1/PAD[2], TCC1/WO[0], TCC3/WO[4], GCLK_IO[0]; also SWCLK for debug.
58 PA31 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[11], SERCOM1/PAD[3], TCC1/WO[1], TCC3/WO[5]; also SWDIO when a debugger is present.
59 PB30 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[14], SERCOM5/PAD[0], TCC0/WO[0], TCC1/WO[2]; supports I2C Hs mode.
60 PB31 bidirectional General-purpose I/O (VDDIO domain) with EXTINT[15], SERCOM5/PAD[1], TCC0/WO[1], TCC1/WO[3]; supports I2C Hs mode.
61 PB00 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[0], ADC AIN[8], PTC Y[6], SERCOM5/PAD[2], TC7/WO[0].
62 PB01 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[1], ADC AIN[9], PTC Y[7], SERCOM5/PAD[3], TC7/WO[1].
63 PB02 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[2], ADC AIN[10], PTC Y[8], SERCOM5/PAD[0], TC6/WO[0], TCC3/WO[2].
64 PB03 bidirectional General-purpose I/O (VDDANA domain) with EXTINT[3], ADC AIN[11], PTC Y[9], SERCOM5/PAD[1], TC6/WO[1], TCC3/WO[3].

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-64(10x10)
Category Embedded Processors & Controllers
Pins 64

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating voltage (SAM D21) VDD 1.62 3.63 V SAM D21 2
VDDIO supply voltage VDDIO 1.62 3.63 V Powers I/O lines, OSC8M and XOSC 36
VDDIN supply voltage VDDIN 1.62 3.63 V Powers I/O lines and the internal regulator 36
VDDANA supply voltage VDDANA 1.62 3.63 V Powers I/O lines and the ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K 36
Operating temperature (suffix U) -40 85 °C U = -40 - 85°C Matte Sn Plating 17
VDDCORE internal regulated voltage VDDCORE 1.2 V Internal regulated voltage output 36

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. 860

CAD (KiCad official)

  • Symbol: ATSAMD21J17A-AU
  • Footprint: Package_QFP:TQFP-64_10x10mm_P0.5mm
  • 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: atsamd21j17a-au-etched.step / atsamd21j17a-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsamd21j17a-au.step / atsamd21j17a-au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (1115 pp, sha256 dfa4692fbd4adf23, retrieved 2026-10-30, 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