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ATSAML21E17B-MUT

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrolleratsaml21e17b-mutfactory-2.0.0extractor-text

Verified ATSAML21E17B-MUT

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 33 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATSAML21E17B-MUT · QFN-32-EP(5x5) · 33 pins
  • ✓copper: 33 copper pads, none touching another net
  • ✓datasheet: all 33 pin names found in the 1158-page datasheet
  • ✓distributor: lcsc C2053404, digikey ATSAML21E17B-MUTTR-ND, mouser 556-ATSAML21E17B-MUT
  • ✓family: QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-ac0q3f_j/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: 33 pins = 33 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 33 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atsaml21e17b-mut.kicad_sym✓ atsaml21e17b-mut.kicad_mod✓ atsaml21e17b-mut.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 4d ago
viewers atsaml21e17b-mut: viewers · Ray 4d ago
atsaml21e17b-mut-etched.glb Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut-etched.step atsaml21e17b-mut: factory component page (tier=mfr) · Ray 4d ago
atsaml21e17b-mut-hero.glb atsaml21e17b-mut: hero GLB from the etched model (keeps the MPN mark) · Ray 4d ago
atsaml21e17b-mut-hero.overlay.json Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut.glb Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut.kicad_mod Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut.kicad_sym Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut.lbr Publish 0.1.0 · Ray 4d ago
atsaml21e17b-mut.step Publish 0.1.0 · Ray 4d ago
package.json Publish 0.1.0 · Ray 4d ago
page.json Set visibility: public · Ray 4d ago
README.md Publish 0.1.0 · Ray 4d ago
verification.json Verified: Published by the parts factory: tier mfr, 33 pins · Ray 4d ago

ATSAML21E17B-MUT

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · QFN-32-EP(5x5)

ATSAML21E17B-MUT from Microchip Tech, in a QFN-32-EP(5x5). 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 PORT group A I/O pin, also EXTINT[0]/EXTWAKE[0], SERCOM1 PAD[0], TCC2 WO[0], and XIN32 for the 32 kHz crystal oscillator, supplied from VSWOUT.
2 PA01 bidirectional PORT group A I/O pin, also EXTINT[1]/EXTWAKE[1], SERCOM1 PAD[1], TCC2 WO[1], and XOUT32 for the 32 kHz crystal oscillator, supplied from VSWOUT.
3 PA02 bidirectional PORT group A I/O pin, also EXTINT[2]/EXTWAKE[2], analog input AIN[0], PTC Y[0], DAC VOUT[0] and OPAMP OA_NEG[0]; analog peripherals enabled on this pin interfere with its digital alternate functions.
4 PA03 bidirectional PORT group A I/O pin, also EXTINT[3]/EXTWAKE[3], ADC VREFA, analog input AIN[1] and PTC Y[1]; analog peripherals enabled on this pin interfere with its digital alternate functions.
5 PA04 bidirectional PORT group A I/O pin, also EXTINT[4]/EXTWAKE[4], ADC VREFB, analog inputs AIN[4] and AIN[0], OPAMP OA_OUT[2], SERCOM0 PAD[0] and TCC0 WO[0].
6 PA05 bidirectional PORT group A I/O pin, also EXTINT[5]/EXTWAKE[5], analog inputs AIN[5] and AIN[1], DAC VOUT[1], OPAMP OA_POS[2], SERCOM0 PAD[1] and TCC0 WO[1].
7 PA06 bidirectional PORT group A I/O pin, also EXTINT[6]/EXTWAKE[6], analog inputs AIN[6] and AIN[2], PTC Y[4], OPAMP OA_POS[0], SERCOM0 PAD[2] and TCC1 WO[0].
8 PA07 bidirectional PORT group A I/O pin, also EXTINT[7]/EXTWAKE[7], analog inputs AIN[7] and AIN[3], OPAMP OA_OUT[0], SERCOM0 PAD[3] and TCC1 WO[1].
9 VDDANA power_in Analog supply voltage, specified at 1.6V to 3.6V; on SAM L21E it also supplies VDDIO internally.
10 GND power_in Ground for the digital power domain.
11 PA08 bidirectional PORT group A I/O pin, also NMI, analog input AIN[16], PTC X[0]/Y[6], SERCOM0/SERCOM2 PAD[0], TCC0 WO[0] and TCC1 WO[2]; this is a High Sink pin and supports I2C.
12 PA09 bidirectional PORT group A I/O pin, also EXTINT[9], analog input AIN[17], PTC X[1]/Y[7], SERCOM0/SERCOM2 PAD[1], TCC0 WO[1] and TCC1 WO[3]; this is a High Sink pin and supports I2C.
13 PA10 bidirectional PORT group A I/O pin, also EXTINT[10], analog input AIN[18], PTC X[2]/Y[8], SERCOM0/SERCOM2 PAD[2], TCC1 WO[0], TCC0 WO[2] and GCLK_IO[4].
14 PA11 bidirectional PORT group A I/O pin, also EXTINT[11], analog input AIN[19], PTC X[3]/Y[9], SERCOM0/SERCOM2 PAD[3], TCC1 WO[1], TCC0 WO[3] and GCLK_IO[5].
15 PA14 bidirectional PORT group A I/O pin, also EXTINT[14], SERCOM2/SERCOM4 PAD[2], TC4 WO[0], TCC0 WO[4] and GCLK_IO[0]; it is also the XIN oscillator input when XOSC is used.
16 PA15 bidirectional PORT group A I/O pin, also EXTINT[15], SERCOM2/SERCOM4 PAD[3], TC4 WO[1], TCC0 WO[5] and GCLK_IO[1]; it is also the XOUT oscillator output when XOSC is used.
17 PA16 bidirectional PORT group A I/O pin, also EXTINT[0], PTC X[4], SERCOM1/SERCOM3 PAD[0], TCC2 WO[0], TCC0 WO[6], GCLK_IO[2] and CCL0 IN[0]; this pin supports I2C and is a High Sink pin.
18 PA17 bidirectional PORT group A I/O pin, also EXTINT[1], PTC X[5], SERCOM1/SERCOM3 PAD[1], TCC2 WO[1], TCC0 WO[7], GCLK_IO[3] and CCL0 IN[1]; this pin supports I2C and is a High Sink pin.
19 PA18 bidirectional PORT group A I/O pin, also EXTINT[2], PTC X[6], SERCOM1/SERCOM3 PAD[2], TC4 WO[0], TCC0 WO[2], analog comparator AC/CMP[0] and CCL0 IN[2].
20 PA19 bidirectional PORT group A I/O pin, also EXTINT[3], PTC X[7], SERCOM1/SERCOM3 PAD[3], TC4 WO[1], TCC0 WO[3], analog comparator AC/CMP[1] and CCL0 OUT.
21 PA22 bidirectional PORT group A I/O pin, also EXTINT[6], PTC X[10], SERCOM3/SERCOM5 PAD[0], TC0 WO[0], TCC0 WO[4], GCLK_IO[6] and CCL2 IN[0]; this is a High Sink pin and supports I2C.
22 PA23 bidirectional PORT group A I/O pin, also EXTINT[7], PTC X[11], SERCOM3/SERCOM5 PAD[1], TC0 WO[1], TCC0 WO[5], USB SOF 1kHz, GCLK_IO[7] and CCL2 IN[1]; this is a High Sink pin and supports I2C.
23 PA24 bidirectional PORT group A I/O pin, also EXTINT[12], SERCOM3/SERCOM5 PAD[2], TC1 WO[0], TCC1 WO[2], USB DM and CCL2 IN[2]; this pin has a reduced pull resistance range of 50 to 150 kΩ.
24 PA25 bidirectional PORT group A I/O pin, also EXTINT[13], SERCOM3/SERCOM5 PAD[3], TC1 WO[1], TCC1 WO[3], USB DP and CCL2 OUT; this pin has a reduced pull resistance range of 50 to 150 kΩ.
25 PA27 bidirectional PORT group A I/O pin, also EXTINT[15] and GCLK_IO[0], supplied from VDDIN; this is a High Sink pin.
26 RESET input External active-low reset input (RESETN) with an internal pull-up resistor; an external pull-up is optional.
27 VSW power_out On-chip switching-mode regulator output; in switching mode it connects to VDDCORE through a 10 µH inductor, and in linear-only mode it is not connected.
28 GND power_in Ground for the digital power domain.
29 VDDCORE passive Core supply pin: the linear regulator output with external decoupling (typically 0.9V to 1.2V) in linear mode, or the core supply input connected to VSW in switching mode.
30 VDDIN power_in Digital supply voltage, specified at 1.6V to 3.6V, with 100nF and 10µF decoupling close to the device.
31 PA30 bidirectional PORT group A I/O pin, also EXTINT[10], SERCOM1 PAD[2], TCC1 WO[0], GCLK_IO[0] and CCL1 IN[0]; it is the SWCLK debug clock input (SWD) and is supplied from VDDIN.
32 PA31 bidirectional PORT group A I/O pin, also EXTINT[11], SERCOM1 PAD[3], TCC1 WO[1] and CCL1 OUT; it is the SWDIO debug data pin, activated when a debugger is present, and is supplied from VDDIN.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package QFN-32-EP(5x5)
Category Single Chip Microcomputer/Microcontroller
Pins 33

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 range (main supply) 1.62 3.63 V Main supply, VDDIN/VDDANA/VDDIO, as printed in power supply connection figures 38
Operating temperature range (ATSAML21E17B-MUT, U grade) -40 85 °C U = -40 to 85°C, Matte Sn plating, QFN32 (ordering table) 19

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 indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor. 1034

CAD (KiCad official)

  • Symbol: ATSAML21E17B-MUT
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: atsaml21e17b-mut-etched.step / atsaml21e17b-mut-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsaml21e17b-mut.step / atsaml21e17b-mut.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (1158 pp, sha256 c7ade1efde79dc98, retrieved 2026-10-31, 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