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ATSAMD20J18A-AN
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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ATSAMD20J18A-AN
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-64(10x10)
ATSAMD20J18A-AN 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 pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (also XIN32 oscillator function). |
| 2 | PA01 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (also XOUT32 oscillator function). |
| 3 | PA02 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 4 | PA03 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 5 | PB04 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 6 | PB05 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 7 | GNDANA | power_in | Ground for the analog power domain. |
| 8 | VDDANA | power_in | Analog supply for the ADC, AC, DAC, PTC and oscillators, 1.62V to 3.63V. |
| 9 | PB06 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 10 | PB07 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 11 | PB08 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 12 | PB09 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 13 | PA04 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 14 | PA05 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 15 | PA06 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 16 | PA07 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 17 | PA08 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 18 | PA09 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 19 | PA10 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 20 | PA11 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 21 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 22 | GND | power_in | Digital ground. |
| 23 | PB10 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 24 | PB11 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 25 | PB12 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 26 | PB13 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 27 | PB14 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 28 | PB15 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 29 | PA12 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 30 | PA13 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 31 | PA14 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer (also XIN oscillator function). |
| 32 | PA15 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer (also XOUT oscillator function). |
| 33 | GND | power_in | Digital ground. |
| 34 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 35 | PA16 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 36 | PA17 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 37 | PA18 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 38 | PA19 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 39 | PB16 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 40 | PB17 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 41 | PA20 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 42 | PA21 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 43 | PA22 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 44 | PA23 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 45 | PA24 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 46 | PA25 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 47 | GND | power_in | Digital ground. |
| 48 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 49 | PB22 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 50 | PB23 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 51 | PA27 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 52 | RESET | input | External active-low reset input (low-level reset), with an internal pull-up resistor. |
| 53 | PA28 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 54 | GND | power_in | Digital ground. |
| 55 | VDDCORE | power_out | Internal regulated voltage output at 1.2V that powers the core, memories, peripherals and DFLL48M; external decoupling pin. |
| 56 | VDDIN | power_in | Input supply to the I/O lines and the internal voltage regulator, 1.62V to 3.63V. |
| 57 | PA30 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain; also carries the SWCLK debug function. |
| 58 | PA31 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain; also carries the SWDIO debug function when a debugger is present. |
| 59 | PB30 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 60 | PB31 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 61 | PB00 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 62 | PB01 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 63 | PB02 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 64 | PB03 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-64(10x10) |
| Category | Single Chip Microcomputer/Microcontroller |
| 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, VDDIN, VDDANA (common VDD) | VDD | 1.62 | 3.63 | V | Single main supply; same voltage applied to VDDIN, VDDIO and VDDANA | 27 | |
| Operating temperature range (grade -N, 105 °C) | -40 | 105 | °C | Grade N; DC up to 32 MHz | 1 |
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. | 551 |
CAD (KiCad official)
- Symbol:
ATSAMD20J18A-AN - Footprint:
Package_QFP:TQFP-64_10x10mm_P0.5mm - 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files:
atsamd20j18a-an-etched.step/atsamd20j18a-an-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atsamd20j18a-an.step/atsamd20j18a-an.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (731 pp, sha256
2505526f248dd8c2, retrieved 2026-11-02, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# ATSAMD20J18A-AN
**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-64(10x10)
ATSAMD20J18A-AN 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 pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (also XIN32 oscillator function). |
| 2 | PA01 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (also XOUT32 oscillator function). |
| 3 | PA02 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 4 | PA03 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 5 | PB04 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 6 | PB05 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 7 | GNDANA | power_in | Ground for the analog power domain. |
| 8 | VDDANA | power_in | Analog supply for the ADC, AC, DAC, PTC and oscillators, 1.62V to 3.63V. |
| 9 | PB06 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 10 | PB07 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 11 | PB08 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 12 | PB09 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 13 | PA04 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 14 | PA05 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 15 | PA06 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 16 | PA07 | bidirectional | General-purpose I/O pin of PORT group A on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 17 | PA08 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 18 | PA09 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 19 | PA10 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 20 | PA11 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 21 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 22 | GND | power_in | Digital ground. |
| 23 | PB10 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 24 | PB11 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 25 | PB12 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 26 | PB13 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 27 | PB14 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 28 | PB15 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 29 | PA12 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 30 | PA13 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 31 | PA14 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer (also XIN oscillator function). |
| 32 | PA15 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer (also XOUT oscillator function). |
| 33 | GND | power_in | Digital ground. |
| 34 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 35 | PA16 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 36 | PA17 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 37 | PA18 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 38 | PA19 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 39 | PB16 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 40 | PB17 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 41 | PA20 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 42 | PA21 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 43 | PA22 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 44 | PA23 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 45 | PA24 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 46 | PA25 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 47 | GND | power_in | Digital ground. |
| 48 | VDDIO | power_in | Digital I/O supply, 1.62V to 3.63V, powering I/O lines, OSC8M and XOSC. |
| 49 | PB22 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 50 | PB23 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 51 | PA27 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 52 | RESET | input | External active-low reset input (low-level reset), with an internal pull-up resistor. |
| 53 | PA28 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 54 | GND | power_in | Digital ground. |
| 55 | VDDCORE | power_out | Internal regulated voltage output at 1.2V that powers the core, memories, peripherals and DFLL48M; external decoupling pin. |
| 56 | VDDIN | power_in | Input supply to the I/O lines and the internal voltage regulator, 1.62V to 3.63V. |
| 57 | PA30 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain; also carries the SWCLK debug function. |
| 58 | PA31 | bidirectional | General-purpose I/O pin of PORT group A on the VDDIO supply domain; also carries the SWDIO debug function when a debugger is present. |
| 59 | PB30 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 60 | PB31 | bidirectional | General-purpose I/O pin of PORT group B on the VDDIO supply domain, with peripheral functions selectable via the PORT multiplexer. |
| 61 | PB00 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 62 | PB01 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 63 | PB02 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
| 64 | PB03 | bidirectional | General-purpose I/O pin of PORT group B on the VDDANA supply domain, with peripheral functions selectable via the PORT multiplexer (analog input capable). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-64(10x10) |
| Category | Single Chip Microcomputer/Microcontroller |
| 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, VDDIN, VDDANA (common VDD) | VDD | 1.62 | | 3.63 | V | Single main supply; same voltage applied to VDDIN, VDDIO and VDDANA | 27 |
| Operating temperature range (grade -N, 105 °C) | | -40 | | 105 | °C | Grade N; DC up to 32 MHz | 1 |
## 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. | 551 |
## CAD (KiCad official)
- Symbol: `ATSAMD20J18A-AN`
- Footprint: `Package_QFP:TQFP-64_10x10mm_P0.5mm`
- 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files: `atsamd20j18a-an-etched.step` / `atsamd20j18a-an-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atsamd20j18a-an.step` / `atsamd20j18a-an.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](docs/atsamd20j18a-an-datasheet.pdf) (731 pp, sha256 `2505526f248dd8c2`, 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](docs/atsamd20j18a-an-datasheet.pdf)