ATSAMC20G16A-AUT - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMC20G16A-AUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.65 | $2,650.00 |
ATSAMC20G16A-AUT Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable peripherals. The SAM C20 family belongs to the Cortex-M0+ architecture -> ARM 32-bit core -> embedded microcontroller -> semiconductor device hierarchy, optimized for low-power deterministic real-time control in noisy industrial environments with 5 V tolerance.
Key features include 64 KB Flash / 8 KB SRAM, up to 48 MHz CPU clock, six SERCOM modules configurable as UART/SPI/I2C, one CAN-FD port, 12-bit 1 MSPS ADC with up to 12 channels, 10-bit 300 kSPS DAC, and a Peripheral Touch Controller (PTC) supporting capacitive touch sensing. The device operates from 2.7 V to 5.5 V, making it directly compatible with 3.3 V and 5 V industrial buses.
The ATSAMC20G16A-AUT uses the Cortex-M0+ Von Neumann architecture with single-cycle 32-bit I/O and a Nested Vector Interrupt Controller (NVIC). The integrated CAN-FD peripheral supports bit rates up to 1 Mbit/s for classical CAN and up to 5 Mbit/s with CAN-FD frames. Hardware dividers and atomic bit manipulation simplify protocol stack implementation.
Typical applications include industrial CAN node controllers, building automation sensor hubs, capacitive touch human-machine interfaces, automotive body controllers, and 5 V-tolerant sensor aggregation nodes. The 5 V tolerance eliminates level shifters on 5 V industrial sensor interfaces.
When designing with this device, ensure the VDDCORE pin is decoupled with a 1 uF and 100 nF capacitor pair and that the trace to VDD is short to minimize inrush during ADC sampling. The automotive-grade -AUT suffix confirms operation up to +85 C ambient and Tape & Reel packaging for high-volume SMT assembly.
Drop-in alternatives for ATSAMC20G16A-AUT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMC20G16A-AUT (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Operating Temperature Range, SRAM.
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View Datasheet →ATSAMC20G16A-AUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 64 KB |
| SRAM | 8 KB |
| Package | 48-TQFP (7x7 mm) |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (automotive grade) |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| CAN-FD Controller | 1 (up to 5 Mbit/s with FD) |
| ADC | 12-bit, up to 1 MSPS, up to 12 channels |
| DAC | 10-bit, 300 kSPS, 1 channel |
| Peripheral Touch Controller (PTC) | Yes |
| Timers/Counters | TC (6), TCC (3), RTC (1) |
| GPIO Count | 38 |
| Mounting Type | Surface Mount (Tape & Reel) |
| RoHS Status | Compliant (Green) |
ATSAMC20G16A-AUT Pin Configuration
| Pin 1 | PA00 — GPIO / XIN |
| Pin 2 | PA01 — GPIO / XOUT |
| Pin 3 | PA02 — GPIO / AIN0 |
| Pin 4 | PA03 — GPIO / AIN1 / VREFA |
| Pin 5 | VDD — Power supply |
| Pin 6 | GND — Ground |
| Pin 7 | PA04 — GPIO / AIN2 |
| Pin 8 | PA05 — GPIO / AIN3 |
| Pin 9 | PA06 — GPIO / AIN4 |
| Pin 10 | PA07 — GPIO / AIN5 |
| Pin 11 | PA08 — GPIO / AIN6 |
| Pin 12 | PA09 — GPIO / AIN7 |
| Pin 13 | PA10 — GPIO / AIN8 |
| Pin 14 | PA11 — GPIO / AIN9 |
| Pin 15 | VDDCORE — Core voltage decoupling |
| Pin 16 | GND — Ground |
| Pin 17 | PA12 — GPIO / AIN10 / PTC_Y0 |
| Pin 18 | PA13 — GPIO / AIN11 / PTC_X0 |
| Pin 19 | PA14 — GPIO / PTC_X1 |
| Pin 20 | PA15 — GPIO / PTC_X2 |
| Pin 21 | PA16 — GPIO / PTC_X3 / SERCOM1_PAD0 |
| Pin 22 | PA17 — GPIO / SERCOM1_PAD1 |
| Pin 23 | PA18 — GPIO / SERCOM1_PAD2 |
| Pin 24 | PA19 — GPIO / SERCOM1_PAD3 |
| Pin 25 | PA20 — GPIO / SERCOM3_PAD0 |
| Pin 26 | PA21 — GPIO / SERCOM3_PAD1 |
| Pin 27 | PA22 — GPIO / SERCOM3_PAD2 |
| Pin 28 | PA23 — GPIO / SERCOM3_PAD3 |
| Pin 29 | PA24 — GPIO / CAN0_TX |
| Pin 30 | PA25 — GPIO / CAN0_RX |
| Pin 31 | PA26 — GPIO / SERCOM0_PAD0 |
| Pin 32 | PA27 — GPIO / SERCOM0_PAD1 |
| Pin 33 | RESET — Reset (active low) |
| Pin 34 | VDD — Power supply |
| Pin 35 | GND — Ground |
| Pin 36 | PB00 — GPIO / SERCOM5_PAD2 |
| Pin 37 | PB01 — GPIO / SERCOM5_PAD3 |
| Pin 38 | PB02 — GPIO / SERCOM5_PAD0 |
| Pin 39 | PB03 — GPIO / SERCOM5_PAD1 |
| Pin 40 | PB04 — GPIO / SERCOM4_PAD0 |
| Pin 41 | PB05 — GPIO / SERCOM4_PAD1 |
| Pin 42 | PB06 — GPIO / SERCOM4_PAD2 |
| Pin 43 | PB07 — GPIO / SERCOM4_PAD3 |
| Pin 44 | PB08 — GPIO / SERCOM2_PAD0 |
| Pin 45 | PB09 — GPIO / SERCOM2_PAD1 |
| Pin 46 | PB10 — GPIO / SERCOM2_PAD2 |
| Pin 47 | PB11 — GPIO / SERCOM2_PAD3 |
| Pin 48 | PA30 — GPIO / SWDIO |
| Pin 49 | PA31 — GPIO / SWCLK |
Typical Applications
ATSAMC20G16A-AUT is suitable for 6 applications: Industrial CAN Node Controller, Capacitive Touch HMI Panel, Building Automation Sensor Hub, Automotive Body Controller, Industrial 5V Sensor Aggregation Node, Smart Appliance Control Board.
Industrial CAN Node Controller
The ATSAMC20G16A-AUT is purpose-built for industrial CAN node controllers thanks to its integrated CAN-FD peripheral supporting classical CAN up to 1 Mbit/s and CAN-FD frames up to 5 Mbit/s. The 5 V tolerance (2.7 V to 5.5 V) interfaces directly to industrial 24 V sensor buses via standard CAN transceivers like the MCP2558FD without level shifters. The Cortex-M0+ 48 MHz core executes CANopen or J1939 stacks in real time, while the 64 KB Flash holds protocol libraries and 8 KB SRAM buffers CAN message queues. The 12-bit ADC with 1 MSPS throughput samples analog sensor inputs synchronously with CAN transmission cycles.
Recommended
Capacitive Touch HMI Panel
The ATSAMC20G16A-AUT integrates a hardware Peripheral Touch Controller (PTC) that supports self-capacitance and mutual-capacitance scanning with spread-spectrum noise rejection. This enables reliable touch key, slider, and wheel sensing on industrial control panels, even in the presence of conducted EMI from motor drives. The 5 V I/O tolerance drives LED indicators and segmented displays directly, eliminating external drivers. The 64 KB Flash holds Microchip's QTouch library, and the Cortex-M0+ runs the touch scanning loop with deterministic latency. Operating temperature -40 C to +85 C suits factory floor deployments.
Recommended
Building Automation Sensor Hub
The ATSAMC20G16A-AUT serves as a multi-sensor aggregation node in building automation systems combining temperature, humidity, CO2, and occupancy sensors. The 6 SERCOM modules provide independent UART, SPI, and I2C buses for connecting diverse sensor ICs (Sensirion SHT, SCD30, PIR motion sensors), while the 12-bit ADC reads analog light sensors and potentiometers. The 5 V tolerance interfaces directly to HVAC actuator boards. The Cortex-M0+ 48 MHz core runs BACnet or Modbus protocol stacks, and the 64 KB Flash holds firmware with over-the-air update support. CAN-FD enables wiring reduction across multi-zone installations.
Recommended
Automotive Body Controller
The ATSAMC20G16A-AUT operates reliably in automotive body control modules driving lighting, wipers, mirror adjustments, and seat controls. The integrated CAN-FD peripheral interfaces with the vehicle's CAN bus at bit rates up to 5 Mbit/s, supporting modern automotive network architectures. The 5 V I/O tolerance connects directly to 12 V body electronics via standard transceivers. The 38 GPIO pins drive relay coils and read switch positions, while the 12-bit ADC monitors battery voltage and current sense amplifiers. Operating from -40 C to +85 C with automotive grade (-AUT suffix) qualification, the device meets body electronics environmental requirements.
Recommended
Industrial 5V Sensor Aggregation Node
The ATSAMC20G16A-AUT is ideal for industrial sensor aggregation nodes requiring 5 V tolerance to interface directly with 5 V transducers, encoders, and actuators. The 12-bit ADC with 1 MSPS sampling rate captures analog signals from pressure, flow, and level sensors, while SERCOM modules run UART for RS-485 sensor chains and SPI for high-speed ADCs. The Cortex-M0+ 48 MHz core aggregates sensor data and transmits it over CAN-FD or serial protocols. The 64 KB Flash holds protocol stacks like Modbus RTU, and the wide 2.7 V to 5.5 V supply range tolerates 5 V industrial bus noise without level shifters.
Recommended
Smart Appliance Control Board
The ATSAMC20G16A-AUT powers control boards in washing machines, dishwashers, ovens, and refrigerators combining motor control, user interface, and connectivity. The PTC peripheral supports capacitive touch keypads on glass front panels, while the 10-bit DAC generates reference voltages for sensor bridges. The 5 V I/O tolerance drives 7-segment displays, LED arrays, and triac interfaces for heater control. SERCOM modules provide UART for WiFi/BLE module connectivity, and CAN-FD enables internal appliance networking. The Cortex-M0+ runs real-time control loops for motor commutation with deterministic interrupt response.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20G16A-AUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20G15A-MUT | ATSAMC20G17A-AUT | ATSAMC20E16A-AUT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7) | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same |
| Flash | 64 KB | 32 KB | 128 KB | 64 KB |
| SRAM | 8 KB | 4 KB | 16 KB | 8 KB |
| CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| CAN-FD Ports | 1 | 1 | 1 | 1 |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Automotive Grade | Yes (-AUT) | Yes (-MUT) | Yes (-AUT) | Yes (-AUT) |
Key Differentiators
- Integrated CAN-FD controller (vs ATSAMD20G16A-AUT)
- 5V I/O tolerance across all pins (vs STM32G071CBT6)
- Hardware Peripheral Touch Controller (PTC) (vs ATSAMC20E16A-AUT)
Design Notes
Decouple VDDCORE with a 1 uF X7R ceramic capacitor placed within 3 mm of the pin, plus a 100 nF X7R for high-frequency noise. VDD requires a bulk 10 uF plus 100 nF pair. According to the SAM C20 datasheet, the VDDCORE LDO outputs 1.2 V internally and cannot be driven externally. Maintain VDD >= 2.7 V at all times during operation.
Route the SWDIO and SWCLK traces to the PA30/PA31 pins with no more than 50 ohm impedance and keep them short (<50 mm). Place a 4.7 kohm pull-up on SWDIO. According to the SAM C20 datasheet, decoupling capacitors must be placed on the same PCB layer as the IC with vias directly under the device exposed pad (if any) to minimize ground bounce.
Do not apply 5 V to GPIO pins on the SAM D20 family (1.62 V to 3.6 V max). The ATSAMC20G16A-AUT (SAM C20) supports 5 V tolerant I/O, but verify the specific pin in the datasheet before connecting to 5 V logic. According to Microchip, only pins designated as 5V tolerant in the pinout table accept 5 V without clamping; SERCOM I/O on most pins supports 5 V input.
Compliance Information
RoHS compliant (Green) per Microchip product page. -AUT suffix confirms automotive grade qualification to +85 C operation.
