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ATSAML21G16B-AUT

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrolleratsaml21g16b-autfactory-2.0.0extractor-text

Verified ATSAML21G16B-AUT

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier mfr, 48 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATSAML21G16B-AUT · TQFP-48(7x7) · 48 pins
  • ✓copper: 48 copper pads, none touching another net
  • ✓datasheet: all 48 pin names found in the 1158-page datasheet
  • ✓distributor: lcsc C2055060, digikey ATSAML21G16B-AUTTR-ND, mouser 556-ATSAML21G16B-AUT
  • ✓family: TQFP-48_7x7mm_P0.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-7wqgo61c/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: 48 pins = 48 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 48 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atsaml21g16b-aut.kicad_sym✓ atsaml21g16b-aut.kicad_mod✓ atsaml21g16b-aut.step
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Contents

README

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ATSAML21G16B-AUT

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-48(7x7)

ATSAML21G16B-AUT from Microchip Tech, in a TQFP-48(7x7). 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 A general-purpose I/O pin 0, a backup pin in VSWOUT domain, also usable as EXTINT[0]/EXTWAKE[0] and XIN32 (32 kHz crystal input).
2 PA01 bidirectional Port A general-purpose I/O pin 1, a backup pin in VSWOUT domain, also usable as EXTINT[1]/EXTWAKE[1] and XOUT32 (32 kHz crystal output).
3 PA02 bidirectional Port A general-purpose I/O pin 2, supplied by VDDANA, also usable as EXTINT[2] and analog input AIN[0] or DAC output VOUT[0].
4 PA03 bidirectional Port A general-purpose I/O pin 3, supplied by VDDANA, also usable as EXTINT[3]/EXTWAKE[3], analog reference VREFA and analog input AIN[1].
5 GNDANA power_in Ground for the analog power domain.
6 VDDANA power_in Analog supply voltage, 1.6V to 3.6V, with decoupling of 100nF and 10µF and a ferrite bead to keep VDD noise out of VDDANA.
7 PB08 bidirectional Port B general-purpose I/O pin 8, supplied by VDDANA, also usable as EXTINT[8], analog input AIN[2] and SERCOM4 PAD[0].
8 PB09 bidirectional Port B general-purpose I/O pin 9, supplied by VDDANA, also usable as EXTINT[9], analog input AIN[3] and SERCOM4 PAD[1].
9 PA04 bidirectional Port A general-purpose I/O pin 4, supplied by VDDANA, also usable as EXTINT[4]/EXTWAKE[4], analog input AIN[4] and SERCOM0 PAD[0].
10 PA05 bidirectional Port A general-purpose I/O pin 5, supplied by VDDANA, also usable as EXTINT[5]/EXTWAKE[5], analog input AIN[5] and SERCOM0 PAD[1].
11 PA06 bidirectional Port A general-purpose I/O pin 6, supplied by VDDANA, also usable as EXTINT[6]/EXTWAKE[6], analog input AIN[6] and SERCOM0 PAD[2].
12 PA07 bidirectional Port A general-purpose I/O pin 7, supplied by VDDANA, also usable as EXTINT[7]/EXTWAKE[7], analog input AIN[7] and SERCOM0 PAD[3].
13 PA08 bidirectional Port A general-purpose I/O pin 8, a High Sink pin, also usable as NMI, SERCOM0/2 PAD[0] and I2C-capable pin.
14 PA09 bidirectional Port A general-purpose I/O pin 9, a High Sink pin, also usable as EXTINT[9], SERCOM0/2 PAD[1] and I2C-capable pin.
15 PA10 bidirectional Port A general-purpose I/O pin 10, supplied by VDDIO, also usable as EXTINT[10], SERCOM0/2 PAD[2] and GCLK_IO[4].
16 PA11 bidirectional Port A general-purpose I/O pin 11, supplied by VDDIO, also usable as EXTINT[11], SERCOM0/2 PAD[3] and GCLK_IO[5].
17 VDDIO power_in Digital I/O supply voltage, 1.6V to 3.6V, decoupled with 100nF and 10µF capacitors.
18 GND power_in Digital ground for the I/O domain.
19 PB10 bidirectional Port B general-purpose I/O pin 10, supplied by VDDIO, also usable as EXTINT[10], PTC Y[2], SERCOM4 PAD[2] and GCLK_IO[4].
20 PB11 bidirectional Port B general-purpose I/O pin 11, supplied by VDDIO, also usable as EXTINT[11], PTC Y[3], SERCOM4 PAD[3] and GCLK_IO[5].
21 PA12 bidirectional Port A general-purpose I/O pin 12, supplied by VDDIO, also usable as EXTINT[12], SERCOM2/4 PAD[0], analog comparator output CMP[0] and I2C-capable pin.
22 PA13 bidirectional Port A general-purpose I/O pin 13, supplied by VDDIO, also usable as EXTINT[13], SERCOM2/4 PAD[1], analog comparator output CMP[1] and I2C-capable pin.
23 PA14 bidirectional Port A general-purpose I/O pin 14, supplied by VDDIO, also usable as EXTINT[14], SERCOM2/4 PAD[2], GCLK_IO[0] and XOSC crystal input XIN.
24 PA15 bidirectional Port A general-purpose I/O pin 15, supplied by VDDIO, also usable as EXTINT[15], SERCOM2/4 PAD[3], GCLK_IO[1] and XOSC crystal output XOUT.
25 PA16 bidirectional Port A general-purpose I/O pin 16, a High Sink pin, also usable as EXTINT[0], PTC X[4], SERCOM1/3 PAD[0] and I2C-capable pin.
26 PA17 bidirectional Port A general-purpose I/O pin 17, a High Sink pin, also usable as EXTINT[1], PTC X[5], SERCOM1/3 PAD[1] and I2C-capable pin.
27 PA18 bidirectional Port A general-purpose I/O pin 18, supplied by VDDIO, also usable as EXTINT[2], PTC X[6], SERCOM1/3 PAD[2] and analog comparator input CMP[0].
28 PA19 bidirectional Port A general-purpose I/O pin 19, supplied by VDDIO, also usable as EXTINT[3], PTC X[7], SERCOM1/3 PAD[3] and analog comparator input CMP[1].
29 PA20 bidirectional Port A general-purpose I/O pin 20, supplied by VDDIO, also usable as EXTINT[4], PTC X[8], SERCOM5/3 PAD[2] and GCLK_IO[4].
30 PA21 bidirectional Port A general-purpose I/O pin 21, supplied by VDDIO, also usable as EXTINT[5], PTC X[9], SERCOM5/3 PAD[3] and GCLK_IO[5].
31 PA22 bidirectional Port A general-purpose I/O pin 22, a High Sink pin, also usable as EXTINT[6], PTC X[10], SERCOM3/5 PAD[0] and I2C-capable pin.
32 PA23 bidirectional Port A general-purpose I/O pin 23, a High Sink pin, also usable as EXTINT[7], PTC X[11], SERCOM3/5 PAD[1], USB SOF 1kHz and I2C-capable pin.
33 PA24 bidirectional Port A general-purpose I/O pin 24, supplied by VDDIO, with a pull resistance of 50 to 150 kΩ, also usable as EXTINT[12], SERCOM3/5 PAD[2] and USB DM.
34 PA25 bidirectional Port A general-purpose I/O pin 25, supplied by VDDIO, with a pull resistance of 50 to 150 kΩ, also usable as EXTINT[13], SERCOM3/5 PAD[3] and USB DP.
35 GND power_in Digital ground for the I/O domain.
36 VDDIO power_in Digital I/O supply voltage, 1.6V to 3.6V, decoupled with 100nF and 10µF capacitors.
37 PB22 bidirectional Port B general-purpose I/O pin 22, supplied by VDDIN, also usable as EXTINT[6], SERCOM5 PAD[2], TC3/WO[0] and GCLK_IO[0].
38 PB23 bidirectional Port B general-purpose I/O pin 23, supplied by VDDIN, also usable as EXTINT[7], SERCOM5 PAD[3], TC3/WO[1] and GCLK_IO[1].
39 PA27 bidirectional Port A general-purpose I/O pin 27, a High Sink pin, supplied by VDDIN, also usable as EXTINT[15] and GCLK_IO[0].
40 RESET input External reset input (RESETN), active low, with an internal pull-up resistor.
41 VSW power_out On-chip switching regulator output, connected to VDDCORE through a 10 µH inductor in switching mode and not connected in linear mode.
42 GND power_in Ground for the core and input supply domain.
43 VDDCORE power_out Core supply voltage, 0.9V to 1.2V typical, decoupled with 100nF and 1µF; output in linear regulator mode and input from VSW in switched regulator mode.
44 VDDIN power_in Input supply voltage for the regulator and digital domain, 1.6V to 3.6V, decoupled with 100nF and 10µF capacitors.
45 PA30 bidirectional Port A general-purpose I/O pin 30, supplied by VDDIN, also usable as the SWCLK debug clock (SWD) and EXTINT[10].
46 PA31 bidirectional Port A general-purpose I/O pin 31, a High Sink pin supplied by VDDIN, also usable as the SWDIO debug data pin (active with a debugger present) and EXTINT[11].
47 PB02 bidirectional Port B general-purpose I/O pin 2, a backup pin in VSWOUT domain, also usable as EXTINT[2], AIN[10] and SUPC OUT[1].
48 PB03 bidirectional Port B general-purpose I/O pin 3, a backup pin in VSWOUT domain, also usable as EXTINT[3], AIN[11] and the VBAT battery supply input.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-48(7x7)
Category Single Chip Microcomputer/Microcontroller
Pins 48

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: ATSAML21G16B-AUT
  • Footprint: Package_QFP:TQFP-48_7x7mm_P0.5mm
  • 3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: atsaml21g16b-aut-etched.step / atsaml21g16b-aut-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsaml21g16b-aut.step / atsaml21g16b-aut.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 2026-11-02, 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