# ATSAME53J20A-AU

**Microchip Tech** · Pre-ordered MCUs · TQFP-64(10x10)

ATSAME53J20A-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 PA00 that also carries EIC EXTINT[0], SERCOM1/PAD[0], TC2/WO[0], and XIN32 for the 32 kHz crystal oscillator. |
| 2 | PA01 | bidirectional | General-purpose I/O PA01 that also carries EIC EXTINT[1], SERCOM1/PAD[1], TC2/WO[1], and XOUT32 for the 32 kHz crystal oscillator. |
| 3 | PA02 | bidirectional | General-purpose I/O PA02 that also carries EIC EXTINT[2], ADC0/AIN[0], DAC/VOUT[0], and the RTC tamper input IN2. |
| 4 | PA03 | bidirectional | General-purpose I/O PA03 that also carries EIC EXTINT[3], the ADC0/AIN[1] analog input, ANAREF/VREFA, and PTC X0/Y0. |
| 5 | PB04 | bidirectional | General-purpose I/O PB04 that also carries EIC EXTINT[4], the ADC1/AIN[6] analog input, and PTC X22/Y22. |
| 6 | PB05 | bidirectional | General-purpose I/O PB05 that also carries EIC EXTINT[5], the ADC1/AIN[7] analog input, and PTC X23/Y23. |
| 7 | GNDANA | power_in | Ground reference for the analog circuitry (ADC, DAC, AC, and PTC). |
| 8 | VDDANA | power_in | Analog supply pin for the ADC, DAC, AC, and PTC. |
| 9 | PB06 | bidirectional | General-purpose I/O PB06 that also carries EIC EXTINT[6], the ADC1/AIN[8] analog input, PTC X24/Y24, and CCL IN[6]. |
| 10 | PB07 | bidirectional | General-purpose I/O PB07 that also carries EIC EXTINT[7], the ADC1/AIN[9] analog input, PTC X25/Y25, and CCL IN[7]. |
| 11 | PB08 | bidirectional | General-purpose I/O PB08 that also carries EIC EXTINT[8], ADC0/AIN[2], ADC1/AIN[0], PTC X1/Y1, SERCOM4/PAD[0], TC4/WO[0], and CCL IN[8]. |
| 12 | PB09 | bidirectional | General-purpose I/O PB09 that also carries EIC EXTINT[9], ADC0/AIN[3], ADC1/AIN[1], PTC X2/Y2, SERCOM4/PAD[1], and TC4/WO[1]. |
| 13 | PA04 | bidirectional | General-purpose I/O PA04 that also carries EIC EXTINT[4], ANAREF/VREFB, ADC0/AIN[4], AC/AIN[0], PTC X3/Y3, SERCOM0/PAD[0], and TC0/WO[0]. |
| 14 | PA05 | bidirectional | General-purpose I/O PA05 that also carries EIC EXTINT[5], ADC0/AIN[5], AC/AIN[1], DAC/VOUT[1], SERCOM0/PAD[1], and TC0/WO[1]. |
| 15 | PA06 | bidirectional | General-purpose I/O PA06 that also carries EIC EXTINT[6], ANAREF/VREFC, ADC0/AIN[6], AC/AIN[2], PTC X4/Y4, SERCOM0/PAD[2], and TC1/WO[0]. |
| 16 | PA07 | bidirectional | General-purpose I/O PA07 that also carries EIC EXTINT[7], ADC0/AIN[7], AC/AIN[3], PTC X5/Y5, SERCOM0/PAD[3], and TC1/WO[1]. |
| 17 | PA08 | bidirectional | General-purpose I/O PA08 that also carries EIC NMI, ADC0/AIN[8], ADC1/AIN[2], SERCOM0/PAD[0], SERCOM2/PAD[1], and TCC0/TCC1 waveform outputs; it is a High Sink pin. |
| 18 | PA09 | bidirectional | General-purpose I/O PA09 that also carries EIC EXTINT[9], ADC0/AIN[9], ADC1/AIN[3], SERCOM0/PAD[1], and SERCOM2/PAD[0]; it is a High Sink pin. |
| 19 | PA10 | bidirectional | General-purpose I/O PA10 that also carries EIC EXTINT[10], ADC0/AIN[10], SERCOM0/PAD[2], SERCOM2/PAD[2], and TCC0/TCC1 waveform outputs. |
| 20 | PA11 | bidirectional | General-purpose I/O PA11 that also carries EIC EXTINT[11], ADC0/AIN[11], SERCOM0/PAD[3], SERCOM2/PAD[3], and TCC0/TCC1 waveform outputs. |
| 21 | VDDIOB | power_in | I/O supply for the group of pins powered from VDDIOB, including PA08 and PA09 for SERCOM I2C. |
| 22 | GND | power_in | Digital ground. |
| 23 | PB10 | bidirectional | General-purpose I/O PB10 that also carries EIC EXTINT[10], SERCOM4/PAD[2], TC5/WO[0], QSPI SCK, SDHC0 DAT[3], and I2S SDI. |
| 24 | PB11 | bidirectional | General-purpose I/O PB11 that also carries EIC EXTINT[11], SERCOM4/PAD[3], TC5/WO[1], QSPI CS, and SDHC0 CK. |
| 25 | PB12 | bidirectional | General-purpose I/O PB12 that also carries EIC EXTINT[12], PTC X26/Y26, SERCOM4/PAD[0], TC4/WO[0], CAN1 TX, and SDHC0 CD. |
| 26 | PB13 | bidirectional | General-purpose I/O PB13 that also carries EIC EXTINT[13], PTC X27/Y27, SERCOM4/PAD[1], TC4/WO[1], CAN1 RX, and SDHC0 WP. |
| 27 | PB14 | bidirectional | General-purpose I/O PB14 that also carries EIC EXTINT[14], PTC X28/Y28, SERCOM4/PAD[2], TC5/WO[0], and CAN1 TX. |
| 28 | PB15 | bidirectional | General-purpose I/O PB15 that also carries EIC EXTINT[15], PTC X29/Y29, SERCOM4/PAD[3], TC5/WO[1], and CAN1 RX. |
| 29 | PA12 | bidirectional | General-purpose I/O PA12 that is a High Sink pin and carries EIC EXTINT[12] and the SERCOM2/SERCOM4 and TCC/CAN/SDHC peripheral functions listed in Table 6-1. |
| 30 | PA13 | bidirectional | General-purpose I/O PA13 that is a High Sink pin and carries EIC EXTINT[13] and the SERCOM2/SERCOM4 and TCC/CAN/SDHC peripheral functions listed in Table 6-1. |
| 31 | PA14 | bidirectional | General-purpose I/O PA14 that also serves as XIN for the XOSC0 crystal oscillator. |
| 32 | PA15 | bidirectional | General-purpose I/O PA15 that also serves as XOUT for the XOSC0 crystal oscillator. |
| 33 | GND | power_in | Digital ground. |
| 34 | VDDIO | power_in | I/O supply for the pin cluster that includes PA16 through PA25 and the PB10 to PB15 group. |
| 35 | PA16 | bidirectional | General-purpose I/O PA16 that is a High Sink pin, carries EIC EXTINT[0], SERCOM1/SERCOM3 functions, and GRXDV on the 64-pin package. |
| 36 | PA17 | bidirectional | General-purpose I/O PA17 that is a High Sink pin and carries EIC EXTINT[1] and SERCOM1/SERCOM3 functions. |
| 37 | PA18 | bidirectional | General-purpose I/O PA18 that carries EIC EXTINT[2] and SERCOM1/SERCOM3 functions. |
| 38 | PA19 | bidirectional | General-purpose I/O PA19 that carries EIC EXTINT[3] and SERCOM1/SERCOM3 functions. |
| 39 | PB16 | bidirectional | General-purpose I/O PB16 that carries EIC EXTINT[0] and the PCC/GMAC/SDHC1 and TCC peripheral functions listed in Table 6-1. |
| 40 | PB17 | bidirectional | General-purpose I/O PB17 that carries EIC EXTINT[1] and the PCC/GMAC/SDHC1 and TCC peripheral functions listed in Table 6-1. |
| 41 | PA20 | bidirectional | General-purpose I/O PA20 that carries EIC EXTINT[4], PTC X14/Y14, SERCOM5/SERCOM3 functions, and SDHC1 CMD. |
| 42 | PA21 | bidirectional | General-purpose I/O PA21 that carries EIC EXTINT[5], PTC X15/Y15, SERCOM5/SERCOM3 functions, and SDHC1 CK. |
| 43 | PA22 | bidirectional | General-purpose I/O PA22 that is a High Sink pin and carries EIC EXTINT[6], PTC X16/Y16, SERCOM3/SERCOM5 functions, and CAN0 TX. |
| 44 | PA23 | bidirectional | General-purpose I/O PA23 that is a High Sink pin and carries EIC EXTINT[7], PTC X17/Y17, SERCOM3/SERCOM5 functions, and CAN0 RX. |
| 45 | PA24 | bidirectional | General-purpose I/O PA24 that carries EIC EXTINT[8], SERCOM3/SERCOM5 functions, PDEC PDEC[0], and the USB DM data line. |
| 46 | PA25 | bidirectional | General-purpose I/O PA25 that carries EIC EXTINT[9], SERCOM3/SERCOM5 functions, PDEC PDEC[1], and the USB DP data line. |
| 47 | GND | power_in | Digital ground. |
| 48 | VDDIO | power_in | I/O supply for the pin cluster that includes PB22, PB23, PA27, and the PA20 to PA25 group. |
| 49 | PB22 | bidirectional | General-purpose I/O PB22 that also serves as XIN for the XOSC1 crystal oscillator. |
| 50 | PB23 | bidirectional | General-purpose I/O PB23 that also serves as XOUT for the XOSC1 crystal oscillator. |
| 51 | PA27 | bidirectional | General-purpose I/O PA27 that carries EIC EXTINT[11] and GCLK_IO[1]. |
| 52 | RESETN | input | Active-low external reset input for the device. |
| 53 | VDDCORE | power_in | Core supply pin for the device, connected to the internal regulator output or an external core supply. |
| 54 | GND | power_in | Digital ground. |
| 55 | VSW | power_out | Switching node of the embedded buck regulator, which connects to the external inductor. |
| 56 | VDDIO | power_in | I/O supply for the pin cluster that includes PA30 and PA31 and the PB30 to PB31 group. |
| 57 | PA30 | bidirectional | General-purpose I/O PA30 that carries EIC EXTINT[14], SWCLK for the SWD debug interface, and TC6/TCC2 and SERCOM1/SERCOM7 functions. |
| 58 | PA31 | bidirectional | General-purpose I/O PA31 that carries EIC EXTINT[15], SWDIO for the SWD debug interface, and TC6/TCC2 and SERCOM1/SERCOM7 functions. |
| 59 | PB30 | bidirectional | General-purpose I/O PB30 that carries EIC EXTINT[14], SERCOM7/SERCOM5 functions, TC0/TCC0 waveform outputs, and the SWO trace output in debug modes other than single-wire. |
| 60 | PB31 | bidirectional | General-purpose I/O PB31 that carries EIC EXTINT[15], SERCOM7/SERCOM5 functions, and TC0/TCC4/TCC0 waveform outputs. |
| 61 | PB00 | bidirectional | General-purpose I/O PB00 that carries EIC EXTINT[0], ADC0/AIN[12], PTC X30/Y30, SERCOM5/PAD[2], TC7/WO[0], and CCL IN[1]; it is in the XOSC32K jitter-minimization steady-signal group for 64-pin packages. |
| 62 | PB01 | bidirectional | General-purpose I/O PB01 that carries EIC EXTINT[1], ADC0/AIN[13], PTC X31/Y31, SERCOM5/PAD[3], TC7/WO[1], and CCL IN[2]; it is also the SUPC OUT0 and RTC OUT output. |
| 63 | PB02 | bidirectional | General-purpose I/O PB02 that carries EIC EXTINT[2], ADC0/AIN[14], PTC X20/Y20, SERCOM5/PAD[0], TC6/WO[0], TCC2/WO[2], and CCL OUT[0]; it is also the SUPC OUT1 and RTC IN1 input. |
| 64 | PB03 | bidirectional | General-purpose I/O PB03 that carries EIC EXTINT[3], ADC0/AIN[15], PTC X21/Y21, SERCOM5/PAD[1], and TC6/WO[1]. |

## 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage VDDIO (1.71V to 3.63V) | VDDIO | 1.71 |  | 3.63 | V |  | 46 |
| Operating temperature, grade U (-40°C to +85°C) |  | -40 |  | 85 | °C | 1.71V to 3.63V, DC to 120 MHz | 1 |
| Maximum clock frequency at -40°C to +85°C |  |  |  | 120 | MHz | 1.71V to 3.63V, -40°C to +85°C | 1 |
| Internal regulator output VDDCORE | VDDCORE |  | 1.2 |  | V | Voltage regulator linear mode output | 46 |

## 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 |
|---|---|---|---|---|
| housing | pet |  | nu1RBase nu1 I Crypto RAM u2RLength Base of R Base of R value filled repetitively with u4FillValue | 1316 |
| 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. | 1697 |

## CAD (KiCad official)

- Symbol: `ATSAME53J20A-AU`
- Footprint: `Package_QFP:TQFP-64_10x10mm_P0.5mm`
- 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files: `atsame53j20a-au-etched.step` / `atsame53j20a-au-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atsame53j20a-au.step` / `atsame53j20a-au.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/atsame53j20a-au-datasheet.pdf) (1934 pp, sha256 `6f02ccc3e69325ab`, retrieved 2026-10-28, 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](docs/atsame53j20a-au-datasheet.pdf)