ATSAMC20E16A-AUTS2 - 48MHz Cortex-M0+ MCU 64KB Flash TQFP-32 | Microchip
MPN: ATSAMC20E16A-AUTS2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4 | $4.00 |
| 10 | $3.65 | $36.50 |
| 100 | $3.12 | $312.00 |
| 500 | $2.78 | $1,390.00 |
| 1,000 | $2.45 | $2,450.00 |
ATSAMC20E16A-AUTS2 Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, memory, and programmable peripherals. The Cortex-M0+ is the smallest and most energy-efficient ARM core, designed for low-power embedded applications; it belongs to the ARM Cortex-M family within the broader 32-bit RISC processor hierarchy. The SAM C20 series is part of Microchip's 5V-tolerant MCU portfolio, bridging legacy 5V systems with modern 32-bit performance.
Key features include a high-accuracy 48 MHz internal RC oscillator, 32KB of Flash emulation using the integrated NVM controller, hardware CRC, and a powerful peripheral touch (PTC) controller. The 32-pin TQFP package provides easy prototyping and PCB routing while supporting up to 26 programmable I/O pins with 5V tolerance. The AEC-Q100 Grade 1 qualification ensures reliability under automotive temperature and vibration stress.
Typical applications include industrial sensor nodes, automotive body electronics, building automation, CAN-FD network endpoints, motor control peripherals, and low-power IoT edge devices. The combination of 5V tolerance and CAN-FD support makes it particularly suitable for industrial fieldbus networks transitioning from legacy CAN to CAN-FD.
When designing with this part, leverage the Atmel Studio/Microchip Studio IDE and the ASF4 library framework. Pay attention to pin multiplexing via the SERCOM and TCC peripherals - configuration requires careful pin map planning. The internal 48 MHz oscillator eliminates the need for an external crystal in cost-sensitive designs.
Drop-in alternatives for ATSAMC20E16A-AUTS2 — 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 ATSAMC20E16A-AUTS2 (same form factor and footprint) — differing in ADC, RoHS Status, Operating Temperature, Package, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMC21E16A-AUT
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →ATSAMC20E15A-AUT
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →ATSAMC20E16A-AUT
✅ Drop-In✓ In Stock
$1.96 / Unit
View Datasheet →ATSAMD20E16A-CFN
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD21E16A-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMC20E16A-AUTS2 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 48 MHz |
| Program Memory Size | 64 KB (64K x 8) Flash |
| RAM Size | 8 KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package / Case | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Number of I/O Pins | Up to 26 programmable I/O |
| ADC | 12-bit, up to 350 ksps |
| Connectivity | SERCOM (UART/SPI/I2C), CAN-FD, I2S |
| AEC-Q100 Qualification | Grade 1 (-40C to +125C capable) |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (TR) |
ATSAMC20E16A-AUTS2 Pin Configuration
| Pin 1 | PA00 — GPIO/SERCOM/I2C |
| Pin 2 | PA01 — GPIO/SERCOM/I2C |
| Pin 3 | PA02 — GPIO/AIN0/ADC |
| Pin 4 | PA03 — GPIO/AIN1/ADC |
| Pin 5 | PA04 — GPIO/AIN2/VREFA |
| Pin 6 | PA05 — GPIO/AIN3/VREFB |
| Pin 7 | PA06 — GPIO/SERCOM/I2C |
| Pin 8 | PA07 — GPIO/SERCOM/I2C |
| Pin 9 | VDD — Power supply 2.7V-5.5V |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO/SERCOM/I2C |
| Pin 12 | PA09 — GPIO/SERCOM/I2C |
| Pin 13 | PA10 — GPIO/SERCOM/I2C |
| Pin 14 | PA11 — GPIO/SERCOM/I2C |
| Pin 15 | PA14 — GPIO/XCLK |
| Pin 16 | PA15 — GPIO/GCLK |
| Pin 17 | PA16 — GPIO/SERCOM/I2C |
| Pin 18 | PA17 — GPIO/SERCOM/I2C |
| Pin 19 | PA18 — GPIO/SERCOM/I2C |
| Pin 20 | PA19 — GPIO/SERCOM/I2C |
| Pin 21 | PA20 — GPIO/SERCOM/I2C |
| Pin 22 | PA21 — GPIO/SERCOM/I2C |
| Pin 23 | PA22 — GPIO/SERCOM/I2C |
| Pin 24 | PA23 — GPIO/SERCOM/I2C |
| Pin 25 | PA24 — GPIO/SERCOM/I2C |
| Pin 26 | PA25 — GPIO/SERCOM/I2C |
| Pin 27 | RESET — Reset input (active low) |
| Pin 28 | SWDIO — Debug data |
| Pin 29 | SWCLK — Debug clock |
| Pin 30 | VDD — Power supply |
| Pin 31 | GND — Ground |
| Pin 32 | NC — Not connected |
Typical Applications
ATSAMC20E16A-AUTS2 is suitable for 6 applications: Industrial CAN-FD Network Nodes, Automotive Body Electronics Modules, Building Automation Controllers, Low-Power IoT Sensor Hubs, Motor Control Peripheral Boards, Human-Machine Interface (HMI) Controllers.
Industrial CAN-FD Network Nodes
The ATSAMC20E16A-AUTS2's integrated CAN-FD controller and 5V tolerance make it ideal for industrial CAN-FD network endpoints replacing legacy CAN 2.0B nodes. The 48 MHz Cortex-M0+ core processes CAN-FD frames up to 5 Mbps while the 5V I/O interfaces directly with industrial sensors and actuators without level shifters. The 64KB Flash accommodates CANopen or J1939 protocol stacks with room for application logic.
Recommended
Automotive Body Electronics Modules
The SAM C20 family's AEC-Q100 Grade 1 qualification and 5V tolerance suit body control modules including lighting controllers, mirror adjusters, and seat controllers. The Cortex-M0+ at 48 MHz handles LIN/CAN communication while the 12-bit ADC reads sensor inputs for position feedback. Operating temperature range of -40C to +125C (Grade 1) supports under-hood mounting in automotive designs.
Recommended
Building Automation Controllers
Building automation systems require 5V tolerant MCUs for HVAC damper actuators, smart thermostats, and access control panels. The ATSAMC20E16A-AUTS2's 5V I/O interfaces with legacy building automation sensors while the SERCOM peripherals support RS-485, I2C, and SPI connectivity to building management networks. The 8KB SRAM handles real-time control loops with predictable latency.
Recommended
Low-Power IoT Sensor Hubs
Battery-powered sensor hubs benefit from the SAM C20's SleepWalking peripherals and Event System that wake the CPU only on relevant events. The ATSAMC20E16A-AUTS2's 5V tolerance simplifies integration with industrial 24V sensor rails through simple resistor dividers. The 64KB Flash supports over-the-air update bootloaders for field-deployed IoT devices.
Recommended
Motor Control Peripheral Boards
The TCC (Timer/Counter for Control) peripherals in the ATSAMC20E16A-AUTS2 generate complementary PWM outputs with dead-time insertion for small BLDC and stepper motor drives. The Cortex-M0+ at 48 MHz executes Field-Oriented Control loops for sub-kW motors. The 12-bit ADC samples phase currents at 350 ksps for torque control feedback.
Recommended
Human-Machine Interface (HMI) Controllers
HMI controllers in industrial equipment use the ATSAMC20E16A-AUTS2 to drive LED indicators, read button matrices, and communicate with main controllers via UART or CAN-FD. The 32-pin TQFP provides sufficient I/O for 7-segment displays and rotary encoders. The PTC (Peripheral Touch Controller) supports capacitive touch buttons without external ICs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20E16A-AUTS2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC21E16A-AUT | ATSAMC20E15A-AUT | ATSAMD20E16A-CFN | ATSAMD21E16A-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz (with HW multiply) | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz |
| Flash | 64 KB | 64 KB | 32 KB (-50%) | 64 KB | 64 KB |
| Supply Voltage | 2.7V-5.5V (5V tolerant) | 2.7V-5.5V (5V tolerant) | 2.7V-5.5V (5V tolerant) | 1.62V-3.6V (3.3V only) | 1.62V-3.6V (3.3V only) |
| CAN-FD Support | Yes | Yes | Yes | No (CAN 2.0B only) | No |
| ADC | 12-bit 350 ksps | 12-bit 1 Msps | 12-bit 350 ksps | 12-bit 350 ksps | 12-bit 350 ksps |
| AEC-Q100 | Grade 1 capable (family) | Grade 1 capable | Grade 1 capable | Not qualified | Not qualified |
Key Differentiators
- 5V supply and I/O tolerance with integrated CAN-FD (vs ATSAMD20E16A-CFN)
- Full 64KB Flash with AEC-Q100 Grade 1 family qualification (vs ATSAMC20E15A-AUT)
- Hardware multiply on Cortex-M0+ upgrade path (vs ATSAMC21E16A-AUT)
Design Notes
Place decoupling capacitors (100 nF ceramic + 1 uF bulk) as close as possible to VDD and GND pins (pins 9, 30 and 10, 31). For the 32-TQFP package, route power and ground on dedicated planes with vias stitched around the perimeter. The exposed thermal pad area on the TQFP-32 (if present on package variant) should be soldered to a ground copper pour for thermal dissipation and improved EMI performance.
Do not exceed the absolute maximum VDD of 6.0V; transients above this will damage the MCU. Ensure the SWD pins (SWDIO pin 28, SWCLK pin 29) are not left floating during normal operation - either connect to a debugger header or pull SWDIO low through 10 kohm resistor to prevent unintended debug entry. The internal 48 MHz oscillator requires the NVM software calibration row to be loaded at startup for accurate timing.
When using SERCOM in I2C mode, include external pull-up resistors (typically 2.2 kohm to 10 kohm depending on bus speed and capacitance) on SDA and SCL lines. The internal pull-ups on SAM C20 GPIO are weak (~20-50 kohm) and unsuitable for reliable I2C communication above 100 kHz. For CAN-FD, place a 120 ohm termination resistor at each end of the bus segment and route the CANH/CANL differential pair with controlled impedance.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 Grade 1 qualified at the SAM C20 family level. Lead-free and halogen-free per Microchip environmental compliance documentation.
