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ATSAMD21E18A-AU

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Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatsamd21e18a-aufactory-2.0.0extractor-text

Verified ATSAMD21E18A-AU

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, 32 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATSAMD21E18A-AU · TQFP-32(7x7) · 32 pins
  • ✓copper: 32 copper pads, none touching another net
  • ✓datasheet: all 32 pin names found in the 1148-page datasheet
  • ✓distributor: lcsc C618771, digikey ATSAMD21E18A-AU-ND, mouser 556-ATSAMD21E18A-AU
  • ✓family: TQFP-32_7x7mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-8qae6qgo/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: 32 pins = 32 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 32 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atsamd21e18a-au.kicad_sym✓ atsamd21e18a-au.kicad_mod✓ atsamd21e18a-au.step
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ATSAMD21E18A-AU

Microchip Tech · Pre-ordered MCUs · TQFP-32(7x7)

ATSAMD21E18A-AU from Microchip Tech, in a TQFP-32(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 on the VDDANA analog domain, with EXTINT[0] and the XIN32 32kHz crystal input multiplexed onto it.
2 PA01 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[1] and the XOUT32 32kHz crystal output multiplexed onto it.
3 PA02 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[2], DAC output VOUT and analog input AIN[0] multiplexed onto it.
4 PA03 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[3], ADC/DAC VREFA and analog input AIN[1] multiplexed onto it.
5 PA04 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[4], ADC VREFB and analog input AIN[4] multiplexed onto it.
6 PA05 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[5] and analog input AIN[5] multiplexed onto it.
7 PA06 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[6] and analog input AIN[6] multiplexed onto it.
8 PA07 bidirectional Port A general-purpose I/O on the VDDANA analog domain, with EXTINT[7] and analog input AIN[7] multiplexed onto it.
9 VDDANA power_in Analog supply input for the analog peripherals and analog pins on the VDDANA domain.
10 GND power_in Ground reference pin for the device.
11 PA08 bidirectional Port A general-purpose I/O on the VDDIO domain, with NMI and analog input AIN[16] multiplexed onto it.
12 PA09 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[9] and analog input AIN[17] multiplexed onto it.
13 PA10 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[10] and analog input AIN[18] multiplexed onto it.
14 PA11 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[11] and analog input AIN[19] multiplexed onto it.
15 PA14 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[14] and the XIN crystal input multiplexed onto it.
16 PA15 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[15] and the XOUT crystal output multiplexed onto it.
17 PA16 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[0] multiplexed onto it.
18 PA17 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[1] multiplexed onto it.
19 PA18 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[2] multiplexed onto it.
20 PA19 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[3] multiplexed onto it.
21 PA22 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[6] multiplexed onto it.
22 PA23 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[7] and the USB SOF 1kHz output multiplexed onto it.
23 PA24 bidirectional Port A general-purpose I/O on the VDDIO domain with USB DM multiplexed onto it; a pull-up is recommended if unconnected.
24 PA25 bidirectional Port A general-purpose I/O on the VDDIO domain with USB DP multiplexed onto it; a pull-up is recommended if unconnected.
25 PA27 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[15] multiplexed onto it.
26 RESET input Active-low external reset input.
27 PA28 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[8] multiplexed onto it.
28 GND power_in Ground reference pin for the device.
29 VDDCORE power_out Regulated output of the internal voltage regulator supplying the core logic.
30 VDDIN power_in Input supply pin for the device and internal voltage regulator.
31 PA30 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[10] and the SWCLK debug clock multiplexed onto it.
32 PA31 bidirectional Port A general-purpose I/O on the VDDIO domain, with EXTINT[11] and the SWDIO debug data multiplexed onto it, activated only with a debugger present.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-32(7x7)
Category Embedded Processors & Controllers
Pins 32

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
VDDIO supply voltage VDDIO 1.62 3.63 V Powers I/O lines, OSC8M and XOSC 35
VDDIN supply voltage VDDIN 1.62 3.63 V Powers I/O lines and the internal regulator 35
VDDANA supply voltage VDDANA 1.62 3.63 V Powers I/O lines, ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K 35
Operating temperature -40 85 °C Package grade U = -40 - 85°C Matte Sn Plating (decoded from -AU suffix in ordering information) 16

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. 859

CAD (KiCad official)

  • Symbol: ATSAMD21E18A-AU
  • Footprint: Package_QFP:TQFP-32_7x7mm_P0.8mm
  • 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: atsamd21e18a-au-etched.step / atsamd21e18a-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsamd21e18a-au.step / atsamd21e18a-au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (1148 pp, sha256 18ca1ccab5aa330f, 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