ATSAMC20G15A-MUT - 48MHz Cortex-M0+ MCU 32KB Flash | Microchip
MPN: ATSAMC20G15A-MUT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.05 | $3.05 |
| 10 | $2.74 | $27.40 |
| 100 | $2.42 | $242.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
| 4,000 | $1.55 | $6,200.00 |
ATSAMC20G15A-MUT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a wide range of peripherals such as timers, communication interfaces, ADCs, and GPIO onto a single silicon die. Within the broader taxonomy of semiconductors, MCUs sit under microcontrollers -> microprocessors and controllers -> integrated circuits (ICs). The Cortex-M0+ core from Arm is the smallest and most energy-efficient member of the Cortex-M family, optimized for low-cost, low-power embedded applications while still providing a 32-bit instruction set, single-cycle hardware multiplier, and deterministic interrupt handling.
Key features of the ATSAMC20G15A-MUT include a Cortex-M0+ core with Micro Trace Buffer and Memory Protection Unit (MPU), 1 KB of independent self-programmable Flash for EEPROM emulation, a 12-bit 1 Msps ADC with up to 16 channels and hardware oversampling, two analog comparators with window-compare, a 16-bit Sigma-Delta DAC, and an integrated temperature sensor. It also provides a Peripheral Touch Controller (PTC) supporting up to 256 channels of capacitive touch and proximity sensing, six SERCOM modules configurable as UART/SPI/I2C, and up to 38 programmable I/O pins. An integrated CAN-FD controller rounds out the connectivity for automotive and industrial networking.
Architecturally, the SAM C20 family shares a common peripheral set with the SAM D20/D21 families, allowing firmware and toolchain reuse. The 5 V-tolerant GPIO and supply simplify interfacing to legacy 5 V sensors and actuators, eliminating the level shifters required by 3.3 V-only MCUs. The on-chip voltage regulator, brown-out detector, and Watchdog Timer with Window mode enhance reliability in harsh industrial environments.
Typical applications include automotive body and chassis controllers, industrial sensor nodes, capacitive touch user interfaces, motor control peripherals, building automation, and CAN-FD networked equipment. The wide 2.7 V to 5.5 V supply range and AEC-Q100 Grade 1 qualification make it especially suited to 12 V/24 V vehicle systems and 24 V industrial bus rails.
When designing with this part, remember that the QFN package requires a thermal pad soldered to a ground copper pour for proper heat dissipation and electrical grounding. The supply pins should be decoupled with 100 nF ceramic capacitors placed as close to each VDD pin as possible, plus a bulk 4.7 uF to 10 uF capacitor near the regulator input.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on individual distributor listings or the manufacturer datasheet, helping engineers compare the ATSAMC20G15A-MUT against pin-compatible options quickly.
Drop-in alternatives for ATSAMC20G15A-MUT β 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 ATSAMC20G15A-MUT (same form factor and footprint) β differing in Package, ADC, Operating Temperature, Program Memory (Flash), DAC.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMC20E15A-MUT
β Drop-Inβ In Stock
$1.61 / Unit
View Datasheet βATSAMC20G16A-MUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMC20G17A-MUT
β Drop-Inβ In Stock
$1.78 / Unit
View Datasheet βATSAMD20G15A-MUT
β Drop-Inβ In Stock
$1.85 / Unit
View Datasheet βATSAMC20E16A-MNT
β Drop-Inβ In Stock
$1.85 / Unit
View Datasheet βATSAMC20E18A-MUT
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βATSAMC20G15A-MUT Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology (formerly Atmel) |
| Series | SAM C20 |
| Core | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum CPU Clock | 48 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| EEPROM Emulation Flash | 1 KB (independent self-programmable) |
| RAM | 4 KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (industrial) |
| AEC-Q100 Grade | Grade 1 |
| Package | 48-QFN (7x7 mm) |
| Mounting Type | Surface Mount |
| I/O Pins | Up to 38 programmable |
| ADC | 12-bit, up to 16 channels, 1 Msps with hardware oversampling |
| DAC | 16-bit Sigma-Delta, 1 channel |
| Analog Comparators | 2 (with window compare) |
| PTC (Touch Controller) | Up to 256 channels capacitive touch / proximity |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| CAN-FD Controller | 1 |
| Temperature Sensor | Integrated |
| RoHS Status | Compliant |
ATSAMC20G15A-MUT Pin Configuration
| Pin 1 | VDDIO β Digital I/O supply voltage |
| Pin 2 | PA02 β GPIO / ADC AIN[0] |
| Pin 3 | PA03 β GPIO / ADC AIN[1] / VREFA |
| Pin 4 | GND β Ground |
| Pin 5 | PA04 β GPIO / ADC AIN[4] / VREFB |
| Pin 6 | PA05 β GPIO / ADC AIN[5] |
| Pin 7 | PA06 β GPIO / ADC AIN[6] |
| Pin 8 | PA07 β GPIO / ADC AIN[7] |
| Pin 9 | PA08 β GPIO / SERCOM0 PAD[0] |
| Pin 10 | PA09 β GPIO / SERCOM0 PAD[1] |
| Pin 11 | PA10 β GPIO / SERCOM0 PAD[2] |
| Pin 12 | PA11 β GPIO / SERCOM0 PAD[3] |
| Pin 13 | VDD β Core supply voltage |
| Pin 14 | GND β Ground |
| Pin 15 | PA14 β GPIO / XIN |
| Pin 16 | PA15 β GPIO / XOUT |
| Pin 17 | PA16 β GPIO / SERCOM1 PAD[0] |
| Pin 18 | PA17 β GPIO / SERCOM1 PAD[1] |
| Pin 19 | PA18 β GPIO / SERCOM1 PAD[2] |
| Pin 20 | PA19 β GPIO / SERCOM1 PAD[3] |
| Pin 21 | PA20 β GPIO / SERCOM3 PAD[0] |
| Pin 22 | PA21 β GPIO / SERCOM3 PAD[1] |
| Pin 23 | PA22 β GPIO / SERCOM2 PAD[0] |
| Pin 24 | PA23 β GPIO / SERCOM2 PAD[1] |
| Pin 25 | PA24 β GPIO / SERCOM2 PAD[2] / CAN RX |
| Pin 26 | PA25 β GPIO / SERCOM2 PAD[3] / CAN TX |
| Pin 27 | GND β Ground |
| Pin 28 | VDD β Core supply voltage |
| Pin 29 | PB02 β GPIO / ADC AIN[10] |
| Pin 30 | PB03 β GPIO / ADC AIN[11] |
| Pin 31 | PB04 β GPIO / ADC AIN[12] |
| Pin 32 | PB05 β GPIO / ADC AIN[13] |
| Pin 33 | PB06 β GPIO / ADC AIN[14] |
| Pin 34 | PB07 β GPIO / ADC AIN[15] |
| Pin 35 | PB08 β GPIO / SERCOM4 PAD[0] |
| Pin 36 | PB09 β GPIO / SERCOM4 PAD[1] |
| Pin 37 | PB10 β GPIO / SERCOM4 PAD[2] |
| Pin 38 | PB11 β GPIO / SERCOM4 PAD[3] |
| Pin 39 | PB12 β GPIO / SERCOM5 PAD[0] |
| Pin 40 | PB13 β GPIO / SERCOM5 PAD[1] |
| Pin 41 | PB14 β GPIO / SERCOM5 PAD[2] |
| Pin 42 | PB15 β GPIO / SERCOM5 PAD[3] |
| Pin 43 | PB16 β GPIO / SERCOM5 PAD[0] alt |
| Pin 44 | PB17 β GPIO / SERCOM5 PAD[1] alt |
| Pin 45 | RESETN β Reset input (active low) |
| Pin 46 | SWDIO β Serial Wire Debug I/O |
| Pin 47 | SWCLK β Serial Wire Debug Clock |
| Pin 48 | GND β Thermal pad / Ground (must be soldered to PCB ground pour) |
Typical Applications
ATSAMC20G15A-MUT is suitable for 6 applications: Automotive Body and Chassis Controllers, Capacitive Touch User Interfaces, Industrial Sensor Nodes and 24V Bus Systems, Building Automation and HVAC Controls, Small BLDC and Stepper Motor Control, Smart Home and IoT Edge Nodes.
Automotive Body and Chassis Controllers
The ATSAMC20G15A-MUT's AEC-Q100 Grade 1 qualification and integrated CAN-FD controller make it a strong fit for 12 V/24 V automotive body electronics such as seat controllers, door modules, mirror adjusters, and lighting drivers. Its 5 V-tolerant GPIO directly interfaces 5 V sensors and actuators without external level shifters, simplifying BOM and PCB layout. The 48 MHz Cortex-M0+ core, plus 6 SERCOM channels, easily handles CAN-FD message processing alongside LIN master/slave stacks. According to Microchip, the SAM C20 family is designed for industrial and commercial applications in noisy environments, supporting engine-bay-adjacent ECUs operating from 2.7 V to 5.5 V with onboard brown-out detection and watchdog.
Recommended
Capacitive Touch User Interfaces
The ATSAMC20G15A-MUT integrates a Peripheral Touch Controller (PTC) supporting up to 256 channels of capacitive touch and proximity sensing with driven shield for water-tolerant operation. Combined with the 12-bit ADC oversampling to 16 bits and the 48 MHz core, it can scan large touch panels and run the touch-state machine deterministically. The 5 V supply allows direct drive of LED backlights and haptic feedback actuators alongside the touch matrix. AEC-Q100 Grade 1 qualification also opens it up to in-cabin automotive HMI applications such as climate-control panels and overhead consoles.
Recommended
Industrial Sensor Nodes and 24V Bus Systems
The ATSAMC20G15A-MUT's 2.7 V to 5.5 V supply range is well-matched to 24 V industrial bus rails after an external wide-Vin DC-DC step-down, and its 5 V GPIO simplifies interfacing to legacy industrial sensors. The Cortex-M0+ core delivers deterministic interrupt latency for time-critical control loops, while 32 KB Flash and 4 KB SRAM hold small protocol stacks such as IO-Link, Modbus RTU, or CANopen. The 12-bit 1 Msps ADC with hardware oversampling enables precise sensor measurements, and the integrated temperature sensor supports self-monitoring for predictive maintenance in factory automation.
Recommended
Building Automation and HVAC Controls
The ATSAMC20G15A-MUT is well-suited to building automation endpoints such as smart thermostats, VAV damper actuators, and lighting controllers, thanks to its 5 V tolerance, 38 GPIO, and CAN-FD connectivity. The 12-bit ADC plus two analog comparators with window compare mode simplify direct connection of thermistors and 0-10 V analog sensors common in HVAC. AEC-Q100 Grade 1 qualification and -40C to +85C industrial temperature range support installation in mechanical rooms and outdoor enclosures. The 48 MHz Cortex-M0+ also handles wireless co-processor command translation for sub-GHz or BLE modules.
Recommended
Small BLDC and Stepper Motor Control
The ATSAMC20G15A-MUT's 48 MHz Cortex-M0+ core, six SERCOM modules, and 16-bit Sigma-Delta DAC make it a viable host for small brushless DC or stepper motor control boards, especially in 5 V systems. Hardware PWM timers support complementary outputs with dead-time insertion for half-bridge drives, and the integrated analog comparators enable fast overcurrent protection. AEC-Q100 Grade 1 extends usability to automotive pump and fan controllers. The 4 KB SRAM supports basic field-oriented-control (FOC) libraries for low-pole-count BLDCs used in fans and small pumps.
Recommended
Smart Home and IoT Edge Nodes
The ATSAMC20G15A-MUT combines low power, 5 V tolerance, and CAN-FD to act as a wired edge node in smart-home and IoT systems, where it can aggregate sensor data from multiple SPI/UART/I2C peripherals. The 32 KB Flash accommodates TLS-lite stacks or Matter-over-Thread bridge logic, and the 4 KB SRAM is enough for buffering telemetry before forwarding over Wi-Fi or BLE companion modules. Its AEC-Q100 qualification also allows automotive cabin IoT use cases such as OBD-II telemetry dongles and vehicle accessory controllers.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20G15A-MUT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20E15A-MUT | ATSAMC20G16A-MUT | ATSAMC20G17A-MUT | ATSAMD20G15A-MUT | ATSAMC20E16A-MNT | ATSAMC20E18A-MUT |
|---|---|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 64 KB | 128 KB | 32 KB | 64 KB | 256 KB |
| SRAM | 4 KB | 4 KB | 8 KB | 16 KB | 4 KB | 8 KB | 32 KB |
| CAN-FD | Yes | No | Yes | Yes | No | No | No |
| Supply 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 | 1.62 V to 3.6 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| AEC-Q100 | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Not qualified (3.3 V family) | Grade 1 | Grade 1 |
Key Differentiators
- Integrated CAN-FD plus 5 V-tolerant I/O in 48-QFN (vs ATSAMC20E15A-MUT)
- Pin-compatible upgrade path to 64 KB / 128 KB / 256 KB Flash (vs ATSAMC20G16A-MUT)
- 5 V I/O tolerance and AEC-Q100 Grade 1 in same package as 3.3 V SAMD20 (vs ATSAMD20G15A-MUT)
Design Notes
Estimated: at 48 MHz active and typical 5 V I/O toggling, the ATSAMC20G15A-MUT consumes roughly 7-9 mA, dissipating approximately 35-45 mW. The 48-QFN package's thermal pad MUST be soldered to a continuous PCB ground pour of at least 25 mm^2 to keep theta_JA below 40 C/W. Without thermal pad soldering, junction temperature can rise 30-40 C above ambient in sealed automotive enclosures, potentially triggering thermal shutdown during sustained PTC scanning or CAN-FD bursts.
Place a 100 nF X7R 0402/0603 ceramic decoupling capacitor within 2 mm of every VDD and VDDIO pin pair, and add a bulk 4.7 uF X5R ceramic near the regulator input. According to the SAM C20 datasheet layout guidelines, the exposed thermal pad requires at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch) stitched into the ground pour. Route the SWDIO/SWCLK pair as a 50 ohm impedance-controlled differential pair with ground shielding to avoid debug-session lockups at 48 MHz core clock.
Do not assume the ATSAMC20G15A-MUT is 3.3 V tolerant only - it natively supports 5 V I/O on PAxx and PBxx pins, but PB04-PB07 and PB08-PB11 are NOT 5 V tolerant when configured as SERCOM or PTC lines. Confirm the SERCOM mux in the Microchip ASF/MPLAB Harmony framework before connecting 5 V peripherals. The CAN-FD peripheral requires a separate CAN transceiver such as ATA6563; the MCU's CAN pins are logic-level only and cannot drive a CAN bus directly.
When routing the external crystal on PA14 (XIN) and PA15 (XOUT), keep the traces under 5 mm, place load capacitors within 2 mm of the pins, and surround the crystal network with a ground guard ring. According to Microchip's SAM C20 hardware design guide, this layout is required to meet the 48 MHz PLL jitter specification and avoid CAN-FD bit-time violations in time-critical automotive networks.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 Grade 1 qualified per SAM C20 datasheet. Lead-free and halogen-free packaging. Conflict-minerals reporting compliant.
