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ATSAMC21E18A-AUT
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Microchip Tech MICROCHIP, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ATSAMC21E18A-AUT
Microchip Tech · MICROCHIP · TQFP-32(7x7)
ATSAMC21E18A-AUT 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 | General-purpose I/O on VDDANA supply with EXTINT[0], SERCOM1 PAD[0], TCC2/WO[0] and AC/CMP[2]; also XIN32 for the 32.768kHz crystal oscillator. |
| 2 | PA01 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[1], SERCOM1 PAD[1], TCC2/WO[1] and AC/CMP[3]; also XOUT32 for the 32.768kHz crystal oscillator. |
| 3 | PA02 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[2], ADC input AIN[0], PTC Y[0] and DAC VOUT. |
| 4 | PA03 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[3], ADC/VREFA external reference (2.0V to VDDANA-0.6V for ADC), ADC AIN[1] and PTC Y[1]. |
| 5 | PA04 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[4], ADC analog input, PTC Y[2], SERCOM0 PAD[0] and TCC0/WO[0]. |
| 6 | PA05 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[5], ADC analog input, PTC Y[3], SERCOM0 PAD[1] and TCC0/WO[1]. |
| 7 | PA06 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[6], ADC analog input, PTC Y[4], AC input INN[0], SERCOM0 PAD[2] and TCC1/WO[0]. |
| 8 | PA07 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[7], ADC analog input, PTC Y[5], AC input INP[0], SERCOM0 PAD[3] and TCC1/WO[1]. |
| 9 | VDDANA | power_in | Analog supply input, 2.7V to 5.5V, with 100nF and 10µF decoupling; on the 32-pin package it is also the supply pin for the VDDIO I/O group (GPIO cluster table). |
| 10 | GND | power_in | Ground pin (also the return for the analog domain on the 32-pin package). |
| 11 | PA08 | bidirectional | General-purpose I/O on VDDIO supply with NMI, ADC inputs, PTC X[0]/Y[16], SERCOM0/SERCOM2 PAD[0] (I2C capable) and TCC0/WO[0]. |
| 12 | PA09 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[9], ADC inputs, PTC X[1]/Y[17], SERCOM0/SERCOM2 PAD[1] (I2C capable) and TCC0/WO[1]. |
| 13 | PA10 | bidirectional | High-sink general-purpose I/O on VDDIO supply with EXTINT[10], PTC X[2]/Y[18], SERCOM0/SERCOM2 PAD[2], TCC1/WO[0] and GCLK_IO[4]. |
| 14 | PA11 | bidirectional | High-sink general-purpose I/O on VDDIO supply with EXTINT[11], PTC X[3]/Y[19], SERCOM0/SERCOM2 PAD[3], TCC1/WO[1] and GCLK_IO[5]. |
| 15 | PA14 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[14], SERCOM2/SERCOM4 PAD[2], TC4/WO[0] and GCLK_IO[0]; also XIN for the external crystal/clock oscillator. |
| 16 | PA15 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[15], SERCOM2/SERCOM4 PAD[3], TC4/WO[1] and GCLK_IO[1]; also XOUT for the external crystal oscillator. |
| 17 | PA16 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[0], PTC X[4]/Y[20], SERCOM1/SERCOM3 PAD[0] (I2C capable), TCC2/WO[0] and GCLK_IO[2]. |
| 18 | PA17 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[1], PTC X[5]/Y[21], SERCOM1/SERCOM3 PAD[1] (I2C capable), TCC2/WO[1] and GCLK_IO[3]. |
| 19 | PA18 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[2], PTC X[6]/Y[22], SERCOM1/SERCOM3 PAD[2], TC4/WO[0] and AC/CMP[0]. |
| 20 | PA19 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[3], PTC X[7]/Y[23], SERCOM1/SERCOM3 PAD[3], TC4/WO[1] and AC/CMP[1]. |
| 21 | PA22 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[6], PTC X[10]/Y[26], SERCOM3/SERCOM5 PAD[0] (I2C capable), TC0/WO[0] and GCLK_IO[6]. |
| 22 | PA23 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[7], PTC X[11]/Y[27], SERCOM3/SERCOM5 PAD[1] (I2C capable), TC0/WO[1] and GCLK_IO[7]. |
| 23 | PA24 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[12], SERCOM3 PAD[2], TC1/WO[0], CAN0/TX and AC/CMP[2]. |
| 24 | PA25 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[13], SERCOM3 PAD[3], TC1/WO[1], CAN0/RX and AC/CMP[3]. |
| 25 | PA27 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[15] and GCLK_IO[0]. |
| 26 | RESETN | input | Active-low external reset input with internal pull-up; low-level threshold below 0.3*VDDIO. |
| 27 | PA28 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[8] and GCLK_IO[0]. |
| 28 | GND | power_in | Ground pin. |
| 29 | VDDCORE | power_out | Regulated core supply output/external decoupling pin, 1.1V to 1.3V typical, with 100nF and 1µF capacitors. |
| 30 | VDDIN | power_in | Digital supply input, 2.7V to 5.5V, with 100nF and 10µF decoupling. |
| 31 | PA30 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[10] and SERCOM1 PAD[2]; also SWCLK serial wire debug clock (1kΩ pull-up recommended). |
| 32 | PA31 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[11] and SERCOM1 PAD[3]; also SWDIO serial wire debug data. |
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 |
|---|---|---|---|---|---|---|---|
| Operating supply voltage | VDD | 2.7 | 5.5 | V | VDDIN and VDDANA at the same voltage | 1 | |
| Operating temperature (U grade) | -40 | 85 | °C | Ordering code U = -40 - 85°C | 19 | ||
| CPU clock frequency | 48 | MHz | DC to 48 MHz | 1 | |||
| VDDCORE regulated output voltage | VDDCORE | 1.2 | V | Internal regulated voltage output | 40 |
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 | configurations, including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. | 977 |
CAD (KiCad official)
- Symbol:
ATSAMC21E18A-AUT - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atsamc21e18a-aut-etched.step/atsamc21e18a-aut-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atsamc21e18a-aut.step/atsamc21e18a-aut.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (1107 pp, sha256
57e02a68f2f793d5, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).
# ATSAMC21E18A-AUT
**Microchip Tech** · MICROCHIP · TQFP-32(7x7)
ATSAMC21E18A-AUT 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 | General-purpose I/O on VDDANA supply with EXTINT[0], SERCOM1 PAD[0], TCC2/WO[0] and AC/CMP[2]; also XIN32 for the 32.768kHz crystal oscillator. |
| 2 | PA01 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[1], SERCOM1 PAD[1], TCC2/WO[1] and AC/CMP[3]; also XOUT32 for the 32.768kHz crystal oscillator. |
| 3 | PA02 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[2], ADC input AIN[0], PTC Y[0] and DAC VOUT. |
| 4 | PA03 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[3], ADC/VREFA external reference (2.0V to VDDANA-0.6V for ADC), ADC AIN[1] and PTC Y[1]. |
| 5 | PA04 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[4], ADC analog input, PTC Y[2], SERCOM0 PAD[0] and TCC0/WO[0]. |
| 6 | PA05 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[5], ADC analog input, PTC Y[3], SERCOM0 PAD[1] and TCC0/WO[1]. |
| 7 | PA06 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[6], ADC analog input, PTC Y[4], AC input INN[0], SERCOM0 PAD[2] and TCC1/WO[0]. |
| 8 | PA07 | bidirectional | General-purpose I/O on VDDANA supply with EXTINT[7], ADC analog input, PTC Y[5], AC input INP[0], SERCOM0 PAD[3] and TCC1/WO[1]. |
| 9 | VDDANA | power_in | Analog supply input, 2.7V to 5.5V, with 100nF and 10µF decoupling; on the 32-pin package it is also the supply pin for the VDDIO I/O group (GPIO cluster table). |
| 10 | GND | power_in | Ground pin (also the return for the analog domain on the 32-pin package). |
| 11 | PA08 | bidirectional | General-purpose I/O on VDDIO supply with NMI, ADC inputs, PTC X[0]/Y[16], SERCOM0/SERCOM2 PAD[0] (I2C capable) and TCC0/WO[0]. |
| 12 | PA09 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[9], ADC inputs, PTC X[1]/Y[17], SERCOM0/SERCOM2 PAD[1] (I2C capable) and TCC0/WO[1]. |
| 13 | PA10 | bidirectional | High-sink general-purpose I/O on VDDIO supply with EXTINT[10], PTC X[2]/Y[18], SERCOM0/SERCOM2 PAD[2], TCC1/WO[0] and GCLK_IO[4]. |
| 14 | PA11 | bidirectional | High-sink general-purpose I/O on VDDIO supply with EXTINT[11], PTC X[3]/Y[19], SERCOM0/SERCOM2 PAD[3], TCC1/WO[1] and GCLK_IO[5]. |
| 15 | PA14 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[14], SERCOM2/SERCOM4 PAD[2], TC4/WO[0] and GCLK_IO[0]; also XIN for the external crystal/clock oscillator. |
| 16 | PA15 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[15], SERCOM2/SERCOM4 PAD[3], TC4/WO[1] and GCLK_IO[1]; also XOUT for the external crystal oscillator. |
| 17 | PA16 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[0], PTC X[4]/Y[20], SERCOM1/SERCOM3 PAD[0] (I2C capable), TCC2/WO[0] and GCLK_IO[2]. |
| 18 | PA17 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[1], PTC X[5]/Y[21], SERCOM1/SERCOM3 PAD[1] (I2C capable), TCC2/WO[1] and GCLK_IO[3]. |
| 19 | PA18 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[2], PTC X[6]/Y[22], SERCOM1/SERCOM3 PAD[2], TC4/WO[0] and AC/CMP[0]. |
| 20 | PA19 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[3], PTC X[7]/Y[23], SERCOM1/SERCOM3 PAD[3], TC4/WO[1] and AC/CMP[1]. |
| 21 | PA22 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[6], PTC X[10]/Y[26], SERCOM3/SERCOM5 PAD[0] (I2C capable), TC0/WO[0] and GCLK_IO[6]. |
| 22 | PA23 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[7], PTC X[11]/Y[27], SERCOM3/SERCOM5 PAD[1] (I2C capable), TC0/WO[1] and GCLK_IO[7]. |
| 23 | PA24 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[12], SERCOM3 PAD[2], TC1/WO[0], CAN0/TX and AC/CMP[2]. |
| 24 | PA25 | bidirectional | General-purpose I/O on VDDIO supply with EXTINT[13], SERCOM3 PAD[3], TC1/WO[1], CAN0/RX and AC/CMP[3]. |
| 25 | PA27 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[15] and GCLK_IO[0]. |
| 26 | RESETN | input | Active-low external reset input with internal pull-up; low-level threshold below 0.3*VDDIO. |
| 27 | PA28 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[8] and GCLK_IO[0]. |
| 28 | GND | power_in | Ground pin. |
| 29 | VDDCORE | power_out | Regulated core supply output/external decoupling pin, 1.1V to 1.3V typical, with 100nF and 1µF capacitors. |
| 30 | VDDIN | power_in | Digital supply input, 2.7V to 5.5V, with 100nF and 10µF decoupling. |
| 31 | PA30 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[10] and SERCOM1 PAD[2]; also SWCLK serial wire debug clock (1kΩ pull-up recommended). |
| 32 | PA31 | bidirectional | General-purpose I/O on VDDIN supply with EXTINT[11] and SERCOM1 PAD[3]; also SWDIO serial wire debug data. |
## 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 |
|---|---|---|---|---|---|---|---|
| Operating supply voltage | VDD | 2.7 | | 5.5 | V | VDDIN and VDDANA at the same voltage | 1 |
| Operating temperature (U grade) | | -40 | | 85 | °C | Ordering code U = -40 - 85°C | 19 |
| CPU clock frequency | | | | 48 | MHz | DC to 48 MHz | 1 |
| VDDCORE regulated output voltage | VDDCORE | | 1.2 | | V | Internal regulated voltage output | 40 |
## 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 | configurations, including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. | 977 |
## CAD (KiCad official)
- Symbol: `ATSAMC21E18A-AUT`
- Footprint: `Package_QFP:TQFP-32_7x7mm_P0.8mm`
- 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files: `atsamc21e18a-aut-etched.step` / `atsamc21e18a-aut-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atsamc21e18a-aut.step` / `atsamc21e18a-aut.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](docs/atsamc21e18a-aut-datasheet.pdf) (1107 pp, sha256 `57e02a68f2f793d5`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/atsamc21e18a-aut-datasheet.pdf)