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ATSAML22J18A-AUT

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by Ray

Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-64(10x10). Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentembedded processors & controllersatsaml22j18a-aut
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ATSAML22J18A-AUT

Microchip Tech · Microcontrollers (MCU/MPU/SOC) · TQFP-64(10x10)

ATSAML22J18A-AUT from Microchip Tech, in a TQFP-64(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PA00 bidirectional Port A bit 0. Battery-backup domain. Muxed: EIC/EXTINT[0], SERCOM1/PAD[0], XIN32 (32.768 kHz crystal input for XOSC32K).
2 PA01 bidirectional Port A bit 1. Battery-backup domain. Muxed: EIC/EXTINT[1], SERCOM1/PAD[1], XOUT32 (32.768 kHz crystal output).
3 PA02 bidirectional Port A bit 2. Muxed: EIC/EXTINT[2], ADC/VREFB, ADC/AIN[0], AC/AIN[0], PTC/XY[8], RTC/IN[2]. Analog function selected via peripheral function B.
4 PA03 bidirectional Port A bit 3. Muxed: EIC/EXTINT[3], ADC/VREFA, ADC/AIN[1], AC/AIN[1], PTC/XY[9].
5 PB04 bidirectional Port B bit 4. Muxed: EIC/EXTINT[4], ADC/AIN[12], AC/AIN[2], PTC/XY[10].
6 PB05 bidirectional Port B bit 5. Muxed: EIC/EXTINT[5], ADC/AIN[13], AC/AIN[3], PTC/XY[11].
7 GNDANA power_in Analog ground for VDDANA domain (ADC, AC, LCD, PTC). Return path for the analog supply.
8 VDDANA power_in Analog supply, 1.62V-3.63V. Powers ADC, AC, LCD, PTC and associated I/O cluster. Must have same supply sequence as VDDIO.
9 PB06 bidirectional Port B bit 6. Muxed: EIC/EXTINT[6], ADC/AIN[14], PTC/XY[12], SLCD/LP[0], CCL/IN[6].
10 PB07 bidirectional Port B bit 7. Muxed: EIC/EXTINT[7], ADC/AIN[15], PTC/XY[13], SLCD/LP[1], CCL/IN[7].
11 PB08 bidirectional Port B bit 8. Muxed: EIC/EXTINT[8], ADC/AIN[2], PTC/XY[14], SLCD/LP[2], SERCOM3/PAD[0], TC/0/WO[0], CCL/IN[8].
12 PB09 bidirectional Port B bit 9. Muxed: EIC/EXTINT[9], ADC/AIN[3], PTC/XY[15], SLCD/LP[3], SERCOM3/PAD[1], TC/0/WO[1], CCL/OUT[2].
13 PA04 bidirectional Port A bit 4. Muxed: EIC/EXTINT[4], ADC/AIN[4], PTC/X[24], SLCD/LP[4], SERCOM0/PAD[0], TCC/WO[0], CCL/IN[0].
14 PA05 bidirectional Port A bit 5. Muxed: EIC/EXTINT[5], ADC/AIN[5], PTC/X[25], SLCD/LP[5], SERCOM0/PAD[1], TCC/WO[1], CCL/IN[1].
15 PA06 bidirectional Port A bit 6. Muxed: EIC/EXTINT[6], ADC/AIN[6], PTC/X[26], SLCD/LP[6], SERCOM0/PAD[2], CCL/IN[2].
16 PA07 bidirectional Port A bit 7. Muxed: EIC/EXTINT[7], ADC/AIN[7], PTC/X[27], SLCD/LP[7], SERCOM0/PAD[3], CCL/OUT[0].
17 PA08 bidirectional Port A bit 8. Muxed: EIC/NMI, PTC/XY[3], SLCD/LP[11], SERCOM0/PAD[0], SERCOM4/PAD[0], TCC/WO[0], CCL/IN[3].
18 PA09 bidirectional Port A bit 9. Muxed: EIC/EXTINT[9], PTC/XY[2], SLCD/LP[12], SERCOM0/PAD[1], SERCOM4/PAD[1], TCC/WO[1], CCL/IN[4].
19 PA10 bidirectional Port A bit 10. Muxed: EIC/EXTINT[10], PTC/XY[1], SLCD/LP[13], SERCOM0/PAD[2], SERCOM4/PAD[2], TCC/WO[2], GCLK/IO[4], CCL/IN[5].
20 PA11 bidirectional Port A bit 11. Muxed: EIC/EXTINT[11], PTC/XY[0], SLCD/LP[14], SERCOM0/PAD[3], SERCOM4/PAD[3], TCC/WO[3], CCL/OUT[1].
21 VDDIO power_in Digital I/O supply, 1.62V-3.63V. Powers I/O lines, OSC16M, XOSC, internal regulator for VDDCORE. Must equal VDDANA.
22 GND power_in Digital ground (common with VDDCORE, VDDIO).
23 VLCD passive Segment LCD bias voltage. Connect external decoupling; can be generated by internal LCD charge pump above VDDIO.
24 PB11 bidirectional Port B bit 11. Muxed: EIC/EXTINT[11], SLCD/LP[21], SERCOM3/PAD[3], TC/1/WO[1], TCC/WO[5], CCL/OUT[1]. Full Fm+ I2C capable (limited currents for Sm, Fm).
25 PB12 bidirectional Port B bit 12. Muxed: EIC/EXTINT[12], SLCD/LP[22], SERCOM3/PAD[0], TC/0/WO[0], TCC/WO[6].
26 PB13 bidirectional Port B bit 13. Muxed: EIC/EXTINT[13], SLCD/LP[23], SERCOM3/PAD[1], TC/0/WO[1], TCC/WO[7].
27 PB14 bidirectional Port B bit 14. Muxed: EIC/EXTINT[14], SLCD/LP[24], SERCOM3/PAD[2], TC/1/WO[0], GCLK/IO[0], CCL/IN[9].
28 PB15 bidirectional Port B bit 15. Muxed: EIC/EXTINT[15], SLCD/LP[25], SERCOM3/PAD[3], TC/1/WO[1], GCLK/IO[1], CCL/IN[10].
29 PA12 bidirectional Port A bit 12. High-Sink pin. Muxed: EIC/EXTINT[12], SLCD/LP[28], SERCOM4/PAD[0], SERCOM3/PAD[0], TCC/WO[6], AC/CMP[0]. I2C Sm/Fm/Fm+ capable.
30 PA13 bidirectional Port A bit 13. High-Sink pin. Muxed: EIC/EXTINT[13], SLCD/LP[29], SERCOM4/PAD[1], SERCOM3/PAD[1], TCC/WO[7], AC/CMP[1].
31 PA14 bidirectional Port A bit 14. Muxed: EIC/EXTINT[14], SLCD/LP[30], SERCOM4/PAD[2], SERCOM3/PAD[2], TCC/WO[4], GCLK/IO[0].
32 PA15 bidirectional Port A bit 15. Muxed: EIC/EXTINT[15], SLCD/LP[31], SERCOM4/PAD[3], SERCOM3/PAD[3], TCC/WO[5], GCLK/IO[1].
33 GND power_in Digital ground.
34 VDDIO power_in Digital I/O supply, 1.62V-3.63V.
35 PA16 bidirectional Port A bit 16. Muxed: EIC/EXTINT[0], PTC/X[28], SLCD/LP[32], SERCOM1/PAD[0], SERCOM2/PAD[0], TCC/WO[6], GCLK/IO[2], CCL/IN[0].
36 PA17 bidirectional Port A bit 17. Muxed: EIC/EXTINT[1], PTC/X[29], SLCD/LP[33], SERCOM1/PAD[1], SERCOM2/PAD[1], TCC/WO[7], GCLK/IO[3], CCL/IN[1].
37 PA18 bidirectional Port A bit 18. Muxed: EIC/EXTINT[2], PTC/X[30], SLCD/LP[34], SERCOM1/PAD[2], SERCOM2/PAD[2], TCC/WO[2], AC/CMP[0], CCL/IN[2].
38 PA19 bidirectional Port A bit 19. Muxed: EIC/EXTINT[3], PTC/X[31], SLCD/LP[35], SERCOM1/PAD[3], SERCOM2/PAD[3], TCC/WO[3], AC/CMP[1], CCL/OUT[0].
39 PB16 bidirectional Port B bit 16. Muxed: EIC/EXTINT[0], SLCD/LP[42], SERCOM5/PAD[0], TC/2/WO[0], TCC/WO[4], GCLK/IO[2], CCL/IN[11]. Note: SERCOM5 not present on L22J.
40 PB17 bidirectional Port B bit 17. Muxed: EIC/EXTINT[1], SLCD/LP[43], SERCOM5/PAD[1], TC/2/WO[1], TCC/WO[5], GCLK/IO[3], CCL/OUT[3].
41 PA20 bidirectional Port A bit 20. Muxed: EIC/EXTINT[4], PTC/XY[16], SLCD/LP[48], SERCOM0/PAD[0], SERCOM2/PAD[2], TC/3/WO[0], TCC/WO[6], GCLK/IO[4].
42 PA21 bidirectional Port A bit 21. Muxed: EIC/EXTINT[5], PTC/XY[17], SLCD/LP[49], SERCOM0/PAD[1], SERCOM2/PAD[3], TC/3/WO[1], TCC/WO[7].
43 PA22 bidirectional Port A bit 22. High-Sink pin. Muxed: EIC/EXTINT[6], PTC/XY[18], SLCD/LP[50], SERCOM0/PAD[2], SERCOM2/PAD[0], TC/0/WO[0], TCC/WO[4], CCL/IN[6]. I2C Sm/Fm/Fm+ capable.
44 PA23 bidirectional Port A bit 23. High-Sink pin. Muxed: EIC/EXTINT[7], PTC/XY[19], SLCD/LP[51], SERCOM0/PAD[3], SERCOM2/PAD[1], TC/0/WO[1], TCC/WO[5], USB/SOF_1KHZ, CCL/IN[7].
45 PA24 bidirectional Port A bit 24 / USB D-. Muxed: EIC/EXTINT[12], SERCOM2/PAD[2], SERCOM5/PAD[0], TC/1/WO[0], TCC/WO[0], USB/DM, CCL/IN[8]. USB D- when USB peripheral enabled.
46 PA25 bidirectional Port A bit 25 / USB D+. Muxed: EIC/EXTINT[13], SERCOM2/PAD[3], SERCOM5/PAD[1], TC/1/WO[1], TCC/WO[1], USB/DP, CCL/OUT[2].
47 GND power_in Digital ground.
48 VDDIO power_in Digital I/O supply, 1.62V-3.63V.
49 PB22 bidirectional Port B bit 22 / XIN (0.4-32 MHz crystal input for XOSC). High-Sink pin. Muxed: EIC/EXTINT[6], SERCOM0/PAD[2], TC/3/WO[0], TCC/WO[2], USB/SOF_1KHZ, GCLK/IO[0], CCL/IN[0].
50 PB23 bidirectional Port B bit 23 / XOUT. High-Sink pin. Muxed: EIC/EXTINT[7], SERCOM0/PAD[3], TC/3/WO[1], TCC/WO[3], GCLK/IO[1], CCL/OUT[0].
51 PA27 bidirectional Port A bit 27. High-Sink pin. Muxed: EIC/EXTINT[15], PTC/XY[21], TCC/WO[5], GCLK/IO[0]. Recommended pin for GCLK I/O.
52 RESET input Active-low reset input (RESET_N). Internal pull-up; drive low to reset the device.
53 VDDCORE power_out Internal voltage regulator output for core, memories, peripherals, DFLL48M and FDPLL96M. Requires external decoupling; do not drive externally.
54 GND power_in Digital ground.
55 VDDOUT power_out Buck/LDO regulator output pin. Connect external inductor (switching mode) or bypass capacitor (linear mode) per typical powering schematic in Section 7.2.3.
56 VDDIO power_in Digital I/O supply, 1.62V-3.63V.
57 PA30 bidirectional Port A bit 30 / SWCLK. High-Sink pin. Muxed: EIC/EXTINT[10], PTC/XY[22], SERCOM1/PAD[2], CORTEX_M0P/SWCLK, GCLK/IO[0], CCL/IN[3]. SWCLK is default after reset.
58 PA31 bidirectional Port A bit 31 / SWDIO. High-Sink pin. Muxed: EIC/EXTINT[11], PTC/XY[23], SERCOM1/PAD[3], SWDIO, CCL/OUT[1]. Debugger cold/hot-plug auto-switches this pad to SWDIO.
59 PB30 bidirectional Port B bit 30. High-Sink pin. Muxed: EIC/EXTINT[14], SERCOM1/PAD[0], SERCOM5/PAD[0], TCC/WO[0]. I2C Sm/Fm/Fm+/Hs capable.
60 PB31 bidirectional Port B bit 31. High-Sink pin. Muxed: EIC/EXTINT[15], SERCOM1/PAD[1], SERCOM5/PAD[1], TCC/WO[1]. I2C Sm/Fm/Fm+/Hs capable.
61 PB00 bidirectional Port B bit 0. Battery-backup domain. Muxed: EIC/EXTINT[0], ADC/AIN[8], SERCOM3/PAD[2], SERCOM5/PAD[2], TC/3/WO[0], RTC/IN[0], CCL/IN[1].
62 PB01 bidirectional Port B bit 1. Battery-backup domain. Muxed: EIC/EXTINT[1], ADC/AIN[9], SERCOM3/PAD[3], SERCOM5/PAD[3], TC/3/WO[1], RTC/IN[2], RTC/OUT, CCL/IN[2].
63 PB02 bidirectional Port B bit 2. Battery-backup domain. Muxed: EIC/EXTINT[2], ADC/AIN[10], SERCOM3/PAD[0], SERCOM5/PAD[0], TC/2/WO[0], RTC/IN[1], CCL/OUT[0].
64 PB03 bidirectional Port B bit 3 / VBAT. Battery-backup domain. Muxed: EIC/EXTINT[3], ADC/AIN[11], SERCOM3/PAD[1], SERCOM5/PAD[1], TC/2/WO[1]. Connects external battery supply for backup domain when used as VBAT.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • ATSAML22J18A-AUT
  • ATSAML22J17A-AUT
  • ATSAML22J16A-AUT
  • ATSAML22J18A-MUT
  • ATSAML22J17A-MUT
  • ATSAML22J16A-MUT
  • ATSAML22G18A-AUT
  • ATSAML22G17A-AUT
  • ATSAML22G16A-AUT
  • ATSAML22G18A-MUT
  • ATSAML22G17A-MUT
  • ATSAML22G16A-MUT
  • ATSAML22G18A-UUT
  • ATSAML22G17A-UUT
  • ATSAML22N18A-AUT
  • ATSAML22N17A-AUT
  • ATSAML22N16A-AUT
  • ATSAML22N18A-CFUT
  • ATSAML22N17A-CFUT
  • ATSAML22N16A-CFUT

CAD (KiCad official)

  • Symbol: ATSAML22J18A-AUT
  • Footprint: Package_QFP:TQFP-64_10x10mm_P0.5mm
  • 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Microchip Tech datasheet (1093 pp, sha256 7237169119498e47, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF