ATSAMC20E17A-MUTS2 - 48MHz Cortex-M0+ MCU, 128KB Flash, 32-VQFN
MPN: ATSAMC20E17A-MUTS2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.13 | $3.13 |
| 10 | $2.95 | $29.50 |
| 100 | $2.62 | $262.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.05 | $2,050.00 |
ATSAMC20E17A-MUTS2 Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The SAM C20 family belongs to the Cortex-M0+ class, the smallest and most energy-efficient ARM core, designed for deterministic real-time control. Within the broader taxonomy, the ATSAMC20E17A fits as MCU -> ARM Cortex-M microcontroller -> 32-bit MCU -> embedded microcontroller, and combines a CPU core, Flash, SRAM, and rich peripherals (SERCOM, CAN-FD, timers, ADC) in one device to replace discrete logic and reduce BOM cost.
Key features include CAN-FD support for robust automotive and industrial networking, multiple SERCOM modules (configurable as UART/SPI/I2C), a 12-bit ADC, and built-in safety features such as a Micro Trace Buffer for lightweight instruction tracing. The 5V-tolerant I/O simplifies interfacing to legacy industrial sensors and actuators that operate above 3.3V logic levels, removing the need for level shifters. The high-accuracy internal RC oscillator eliminates an external crystal in many designs.
Architecturally, the ATSAMC20E17A-MUTS2 uses a Cortex-M0+ core with a 2-stage pipeline, Thumb-2 instruction set, and a single-cycle 32x32 hardware multiplier. The SAM C20 series is built on a low-power CMOS process and integrates a 5V-tolerant I/O ring that operates directly from industrial 24V-conditioned rails. The result is a deterministic, low-latency MCU suited to real-time control loops.
Typical applications include industrial sensor nodes, motor control auxiliary MCUs, building automation controllers, automotive body and chassis ECUs (CAN-FD bus nodes), and 5V industrial communication bridges. Designers also use the C20 family in appliance controls and HVAC systems where 5V tolerance and CAN-FD are mandatory.
When designing with this MCU, allocate sufficient decoupling (100nF plus 4.7uF bulk) close to the VDD pins and follow Microchip's Atmel START or MPLAB Harmony code-generation flows for peripheral configuration. Pay attention to the 32-VQFN thermal pad PCB layout for ground continuity and thermal dissipation.
Drop-in alternatives for ATSAMC20E17A-MUTS2 — 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 ATSAMC20E17A-MUTS2 (same form factor and footprint) — differing in Package, MSL Level, ADC, RoHS Status, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMC20E17A-MUT
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View Datasheet →ATSAMC20E15A-MNT
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View Datasheet →ATSAMC20E17A-MUTS2 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit, single-core) |
| Maximum Clock Frequency | 48 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) in-system self-programmable |
| EEPROM Emulation Flash | 4 KB independent self-programmable Flash |
| SRAM | 16 KB |
| Operating Voltage Range | 2.7 V to 5.5 V (5V tolerant) |
| I/O Voltage Tolerance | 5V |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 32-pin VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Tape and Reel Orientation | S2 (reverse) |
| Communications Peripherals | SERCOM (UART/SPI/I2C), CAN-FD |
| Hardware Multiplier | Single-cycle 32x32 |
| Trace | Micro Trace Buffer (MTB) |
| Memory Protection | Memory Protection Unit (MPU) |
| Internal Oscillator | High accuracy 48 MHz RC |
| RoHS Status | Compliant (Green, Pb-free) |
ATSAMC20E17A-MUTS2 Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM / ADC input |
| Pin 2 | PA01 — GPIO / SERCOM / ADC input |
| Pin 3 | PA02 — GPIO / SERCOM / ADC input (AIN0) |
| Pin 4 | PA03 — GPIO / SERCOM / ADC reference |
| Pin 5 | PA04 — GPIO / SERCOM |
| Pin 6 | PA05 — GPIO / SERCOM |
| Pin 7 | PA06 — GPIO / SERCOM |
| Pin 8 | PA07 — GPIO / SERCOM |
| Pin 9 | VDD — Digital supply voltage (2.7V-5.5V) |
| Pin 10 | VSS — Ground |
| Pin 11 | PA08 — GPIO / SERCOM / NMI |
| Pin 12 | PA09 — GPIO / SERCOM |
| Pin 13 | PA10 — GPIO / SERCOM |
| Pin 14 | PA11 — GPIO / SERCOM |
| Pin 15 | PA14 — GPIO / SERCOM |
| Pin 16 | PA15 — GPIO / SERCOM |
| Pin 17 | PA16 — GPIO / SERCOM |
| Pin 18 | PA17 — GPIO / SERCOM |
| Pin 19 | PA18 — GPIO / SERCOM |
| Pin 20 | PA19 — GPIO / SERCOM |
| Pin 21 | PA20 — GPIO / SERCOM |
| Pin 22 | PA21 — GPIO / SERCOM |
| Pin 23 | PA22 — GPIO / SERCOM |
| Pin 24 | PA23 — GPIO / SERCOM |
| Pin 25 | PA24 — GPIO / SERCOM |
| Pin 26 | PA25 — GPIO / SERCOM |
| Pin 27 | PB22 — GPIO / SERCOM |
| Pin 28 | PB23 — GPIO / SERCOM |
| Pin 29 | RESET — Reset input (active low) |
| Pin 30 | SWDIO — Serial Wire Debug data |
| Pin 31 | SWCLK — Serial Wire Debug clock |
| Pin 32 | VDDCORE — Internal core voltage decoupling |
| Pin 33 | EP — Exposed thermal pad - tie to ground (VQFN-32 thermal pad) |
Typical Applications
ATSAMC20E17A-MUTS2 is suitable for 6 applications: Industrial Sensor Node with CAN-FD, 5V Industrial Communication Bridge, Appliance Control and HVAC, Automotive Body and Chassis ECU, Building Automation Controller, Low-Voltage Motor Control Auxiliary MCU.
Industrial Sensor Node with CAN-FD
The ATSAMC20E17A-MUTS2 is a strong fit for industrial sensor nodes because its on-chip CAN-FD controller supports up to 64-byte payloads over industrial bus lengths, while its 5V-tolerant I/O eliminates level shifters when interfacing to legacy 5V analog sensors and 4-20 mA loops. With 128KB Flash and 16KB SRAM it can run CANopen or J1939 stacks alongside signal-conditioning firmware. Placed on a 5V industrial rail, the MCU deterministically services a 48MHz real-time loop with single-cycle interrupt latency, and the high-accuracy internal 48MHz RC oscillator removes the need for an external crystal in cost-sensitive field nodes.
Recommended
5V Industrial Communication Bridge
The ATSAMC20E17A-MUTS2 bridges 5V UART/RS-485 sensors to higher-level CAN-FD backbones by combining multiple SERCOM modules (each configurable as UART, SPI, or I2C) with the CAN-FD peripheral, all powered from a single 5V rail. The 5V-tolerant GPIO directly drives RS-485 transceivers without external level translation, and the 48MHz Cortex-M0+ provides enough headroom for protocol-conversion firmware. Designers commonly pair it with isolated RS-485 transceivers on a 24V industrial bus to build deterministic protocol bridges.
Recommended
Appliance Control and HVAC
The ATSAMC20E17A-MUTS2 is widely used in white-goods and HVAC controllers because its 5V I/O interfaces directly to triac drivers, zero-cross detectors, and 24V thermostat lines, while the Cortex-M0+ core handles PID loops, BLDC commutation tables, and user-interface scan firmware. The 128KB Flash stores both the safety library and the application code, and the 16KB SRAM is sufficient for waveform buffers. The 32-VQFN package fits behind displays in compact appliance front panels.
Recommended
Automotive Body and Chassis ECU
The ATSAMC20E17A-MUTS2 serves as a CAN-FD node ECU for body and chassis subsystems such as lighting controllers, mirror modules, and seat-position controllers, where 5V tolerance allows direct connection to legacy 5V sensors and the CAN-FD controller supports modern automotive networks at 2 Mbps. Its industrial -40C to +85C temperature range covers most cabin and under-hood-adjacent locations, and the small 32-VQFN footprint fits space-constrained modules. Production designs targeting AEC-Q100 qualification should evaluate the related ATSAMC20E17A-MUT automotive-grade part instead.
Recommended
Building Automation Controller
The ATSAMC20E17A-MUTS2 powers building-automation subsystems such as BACnet MS/TP nodes, DALI lighting controllers, and Modbus RTU bridges by combining CAN-FD or SERCOM-driven UART interfaces with 5V-tolerant I/O for direct connection to industrial sensors. The 48MHz core runs BACnet scheduling firmware, the 128KB Flash accommodates overlay libraries, and the 16KB SRAM buffers telemetry frames. Multiple SERCOM modules let one MCU serve as a multi-protocol gateway.
Recommended
Low-Voltage Motor Control Auxiliary MCU
The ATSAMC20E17A-MUTS2 acts as an auxiliary control MCU alongside a dedicated motor-control DSP or FPGA, handling HMI, safety monitoring, and CAN-FD communication while the main controller executes the FOC loop. The Cortex-M0+ at 48MHz handles UI scanning, fault logging, and diagnostic reporting, with 5V-tolerant I/O connecting to industrial encoders and limit switches. The 32-VQFN exposed pad gives a low-thermal-resistance path when the MCU is mounted next to power stages.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20E17A-MUTS2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20E17A-MUT | ATSAMC20E17A-MNT | ATSAMC20E16A-MNT | ATSAMC20E15A-MNT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5x5) | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same |
| Flash | 128 KB | 128 KB | 128 KB | 64 KB | 32 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 4 KB |
| Core / Max Clock | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz |
| I/O Voltage Tolerance | 5V tolerant | 5V tolerant | 5V tolerant | 5V tolerant | 5V tolerant |
| CAN-FD | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Tape & Reel Orientation | S2 | S1 | S1 | S1 | S1 |
Key Differentiators
- 5V-tolerant I/O ring without external level shifters (vs ATSAMC21E17A)
- Largest Flash density in the SAM C20 32-VQFN family (vs ATSAMC20E15A-MNT)
- S2 tape-and-reel orientation matches second-side SMT lines (vs ATSAMC20E17A-MUT)
Design Notes
Place a 100nF ceramic decoupling capacitor as close as possible to every VDD pin and a single 4.7uF bulk capacitor near the package. The VDDCORE pin requires its own 1uF decoupling capacitor per the SAM C20 datasheet. Do not rely on the internal regulator alone - bulk decoupling on the 5V supply prevents VDD drop during CAN-FD transmit bursts.
The 32-VQFN exposed thermal pad MUST be soldered to a ground plane of at least 0.5 square inch to meet the datasheet thermal resistance and to provide a low-impedance ground return for SERCOM and CAN-FD signals. Per IPC-2221 and the SAM C20 datasheet, use at least 4 thermal vias in the EP for heat transfer, and keep traces from high-speed SERCOM lines short to avoid EMI on industrial buses.
Do not assume the ATSAMC20E17A-MUTS2 is pin-compatible with the ATSAMC21E17A - the SAM C21 family uses 3.3V-only I/O. Mixing them on the same 5V PCB will damage the C21's I/O ring. Verify your 5V sensor interface by reading the SAM C20 datasheet's Absolute Maximum Ratings and the I/O pin drive-strength tables before finalizing the schematic.
When routing CAN-FD at 2 Mbps or higher, keep the bus stubs under 1/10 of the rise time and use a twisted pair with 120 ohm characteristic impedance terminated at both ends. Place the MCP2562FD transceiver within 25 mm of the MCU CAN pins to minimize stub length, and add a common-mode choke if the harness exceeds 1 m to meet industrial EMC limits.
Compliance Information
RoHS-compliant per Microchip product page. The industrial -40C to +85C variant is not AEC-Q100 qualified - automotive designers should evaluate the SAM C20 automotive-grade part separately. Lead-free (Pb-free) and Green per Microchip environmental compliance documentation.
