ATSAMC20G16A-MNT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMC20G16A-MNT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.21 | $2,210.00 |
ATSAMC20G16A-MNT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, communication interfaces, and analog blocks. The Cortex-M0+ is the most energy-efficient ARM core for embedded designs, while the SAM C20 family is positioned by Microchip for cost-sensitive 5V-tolerant industrial and automotive body/comfort applications. In the broader taxonomy, this device belongs to: microcontroller -> embedded MCU -> 32-bit MCU -> ARM Cortex-M0+ MCU -> semiconductor IC.
Key specifications include 64 KB Flash (64K x 8), 8 KB SRAM, a 12-bit 1 Msps ADC with up to 10 analog channels, 5V tolerant I/O, and full-speed USB device support depending on variant. The device also integrates a CAN-FD controller, SERCOM (configurable serial communication) peripherals supporting USART, SPI, and I2C, a 16-bit Sigma-Delta ADC interface option, and a Peripheral Touch Controller (PTC) for capacitive touch sensing. The industrial-grade -40C to +105C temperature range matches harsh-environment requirements.
Architecturally, the ATSAMC20G16A uses a single-cycle hardware multiplier, Nested Vectored Interrupt Controller (NVIC), and Microchip's SAM D/C20 bus matrix with separate AHB/APB domains for low-latency peripheral access. The integrated SleepWalking peripherals and Event System allow autonomous peripheral operation while the CPU is in sleep, making the part well-suited to battery-aware IoT and sensor nodes.
Typical applications include industrial sensor conditioning, CAN node endpoints, low-cost BLDC/PMSM motor control (especially with companion gate drivers), USB human-interface devices, capacitive touch user interfaces, and home appliance control boards. The 5V-tolerant I/O simplifies integration with legacy 5V sensors and drivers, a differentiator from typical 3.3V-only Cortex-M0+ parts.
When designing with this device, ensure the exposed pad (EP) is properly soldered to a sufficient ground copper pour for thermal dissipation and electrical grounding. Decoupling: place 100 nF + 1 uF ceramic capacitors near each VDD pin, and a 4.7 uF bulk capacitor at the regulator output. The 48 MHz core requires the system clock to be configured via the GCLK generator before peripherals operate at full speed.
This page synthesizes distributor pricing, drop-in alternatives from the SAM C20 family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAMC20G16A-MNT — 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-MNT (same form factor and footprint) — differing in ADC, Package, DAC, Operating Temperature, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMC20G17A-MNT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMC20G18A-MNT
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →ATSAMC20G15A-MUT
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →ATSAMC20G16A-AUT
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →ATSAMC20E16A-MNT
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ATSAMC20G16A-MNT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum Clock Frequency | 48 MHz |
| Flash Program Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Package | 48-VQFN (7x7 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Voltage Tolerance | 5 V tolerant |
| Operating Temperature Range | -40C to +105C (industrial) |
| ADC | 12-bit, up to 1 Msps, up to 10 channels |
| Communication Interfaces | SERCOM (USART/SPI/I2C), CAN-FD |
| Timers/Counters | TC (16-bit), TCC (24-bit PWM) |
| Touch Sensing | Peripheral Touch Controller (PTC) |
| DMA Channels | 16 |
| MSL Level | 3 |
| RoHS Status | Compliant |
ATSAMC20G16A-MNT Pin Configuration
| Pin 1 | PA00 — General purpose I/O / ADC input |
| Pin 2 | PA01 — General purpose I/O / ADC input |
| Pin 3 | PA02 — General purpose I/O / ADC input |
| Pin 4 | PA03 — General purpose I/O / ADC input |
| Pin 5 | PA04 — General purpose I/O / ADC input |
| Pin 6 | PA05 — General purpose I/O / ADC input |
| Pin 7 | PA06 — General purpose I/O / ADC input |
| Pin 8 | PA07 — General purpose I/O / ADC input |
| Pin 9 | VDDIO — I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — General purpose I/O / SERCOM |
| Pin 12 | PA09 — General purpose I/O / SERCOM |
| Pin 13 | PA10 — General purpose I/O / SERCOM |
| Pin 14 | PA11 — General purpose I/O / SERCOM |
| Pin 15 | PA12 — General purpose I/O / SERCOM |
| Pin 16 | PA13 — General purpose I/O / SERCOM |
| Pin 17 | PA14 — General purpose I/O / SERCOM |
| Pin 18 | PA15 — General purpose I/O / SERCOM |
| Pin 19 | PA16 — General purpose I/O / SERCOM / CAN |
| Pin 20 | PA17 — General purpose I/O / SERCOM / CAN |
| Pin 21 | PA18 — General purpose I/O |
| Pin 22 | PA19 — General purpose I/O |
| Pin 23 | PB08 — General purpose I/O |
| Pin 24 | PB09 — General purpose I/O |
| Pin 25 | PA20 — General purpose I/O |
| Pin 26 | PA21 — General purpose I/O |
| Pin 27 | PB10 — General purpose I/O |
| Pin 28 | PB11 — General purpose I/O |
| Pin 29 | PA22 — General purpose I/O |
| Pin 30 | PA23 — General purpose I/O |
| Pin 31 | PA24 — General purpose I/O |
| Pin 32 | PA25 — General purpose I/O |
| Pin 33 | GND — Ground |
| Pin 34 | VDDIO — I/O supply voltage |
| Pin 35 | PA26 — General purpose I/O |
| Pin 36 | PA27 — General purpose I/O |
| Pin 37 | PA28 — General purpose I/O |
| Pin 38 | PA29 — General purpose I/O / SWDIO |
| Pin 39 | PA30 — General purpose I/O / SWCLK |
| Pin 40 | PA31 — General purpose I/O |
| Pin 41 | PB02 — General purpose I/O |
| Pin 42 | PB03 — General purpose I/O |
| Pin 43 | VDDIN — Voltage regulator input |
| Pin 44 | VDDCORE — Internal core voltage output |
| Pin 45 | GND — Ground |
| Pin 46 | VDDIO — I/O supply voltage |
| Pin 47 | RESET — Reset input (active low) |
| Pin 48 | GND — Ground |
| Pin 49 | EP — Exposed thermal pad (must be soldered to ground) |
Typical Applications
ATSAMC20G16A-MNT is suitable for 6 applications: Industrial CAN Sensor Hub, Capacitive Touch User Interface, Low-Cost BLDC Motor Control (Sensorless), Home Appliance Control Board, USB HID / Human Interface Device, Industrial Sensor Transmitter (4-20 mA).
Industrial CAN Sensor Hub
The ATSAMC20G16A-MNT's integrated CAN-FD controller (ISO 11898-1:2015, up to 1 Mbit/s) and 5 V tolerant I/O make it a strong fit for industrial CAN sensor hubs that aggregate analog/digital sensor data and forward it over a CANopen or proprietary CAN network. With 64 KB Flash and 8 KB SRAM, the device runs a CAN-FD stack plus light sensor-fusion code, and the 12-bit 1 Msps ADC handles up to 10 analog channels for thermocouple, pressure, or strain-gauge front-ends. The -40C to +105C industrial temperature range matches factory-floor and outdoor-cabinet requirements. Using a single CAN-FD node reduces BOM versus a discrete MCU + external CAN transceiver, but the system designer must still add an external CAN transceiver IC for the physical layer.
Recommended
Capacitive Touch User Interface
The ATSAMC20G16A-MNT integrates a Peripheral Touch Controller (PTC) supporting hardware-accelerated capacitive touch sensing for buttons, sliders, and wheels, eliminating the host CPU from the touch-sampling loop. Combined with 64 KB Flash for the touch library + application, 12-bit ADC for moisture/guard-sensing, and SERCOM (I2C/SPI) for driving an external display, the part is well suited to appliance, consumer-electronics, and industrial HMI panels. The 5V tolerance simplifies direct drive of 5V LED backlights. The exposed pad of the 48-VQFN aids thermal dissipation in sealed enclosures with limited convection.
Recommended
Low-Cost BLDC Motor Control (Sensorless)
The ATSAMC20G16A-MNT is viable for cost-sensitive BLDC/PMSM motor control (small fans, pumps, appliance drives) thanks to its 24-bit TCC timer for center-aligned PWM, 16-bit TC auxiliary timers for commutation, 12-bit ADC for back-EMF sensing, and 64 KB Flash holding the sensorless trapezoidal or simple FOC firmware. The 48 MHz Cortex-M0+ core offers enough headroom for low-speed sensorless commutation loops. For higher-performance FOC at higher speeds, consider the SAM E70/SAM S70 Cortex-M4F families. Pair with a Microchip gate driver such as the MCP8024/TC78B006 for the 3-phase bridge.
Recommended
Home Appliance Control Board
The ATSAMC20G16A-MNT's combination of 5 V tolerant I/O, industrial -40C to +105C temperature, CAN-FD, and 64 KB Flash addresses the typical home-appliance control board requirements: directly driving 5 V relays, triac interfaces, NTC thermistors (via the 12-bit ADC), and communicating with the appliance's main controller over CAN. SERCOM channels can drive the user display (SPI) and a real-time-clock or EEPROM backup (I2C). The Cortex-M0+ core's low active current helps meet stringent ENERGY STAR standby requirements when the appliance is idle, and SleepWalking peripherals enable selective wake-up from sensor events.
Recommended
USB HID / Human Interface Device
With its Cortex-M0+ core at 48 MHz, 64 KB Flash, 8 KB SRAM, and SERCOM peripherals, the ATSAMC20G16A-MNT can implement USB HID class devices (custom HID, keyboard, mouse, game controllers, sensor reporting) when paired with an external USB FS PHY or - on compatible package variants - the integrated USB FS device controller. The part's low power consumption benefits battery-powered wireless HID dongles, and the exposed-pad VQFN package allows compact PCB layouts. For designs requiring integrated USB, consider the ATSAMC20N18A (SAM C20 USB-equipped variant).
Recommended
Industrial Sensor Transmitter (4-20 mA)
The ATSAMC20G16A-MNT supports 4-20 mA industrial sensor transmitters with its 12-bit ADC (up to 1 Msps), 5 V tolerant I/O for direct connection to industrial field-side signal conditioning, and 64 KB Flash for linearization tables, HART or proprietary protocol stacks, and diagnostics. The wide operating temperature (-40C to +105C) handles outdoor and process-industry environments. The integrated CAN-FD enables dual-protocol output (analog 4-20 mA + CAN bus) in modern smart transmitters. Add a separate DAC or PWM+filter for analog 4-20 mA current loop generation.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20G16A-MNT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20G17A-MNT | ATSAMC20G18A-MNT | ATSAMC20G15A-MUT | ATSAMC20G16A-AUT | ATSAMC20E16A-MNT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7) | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 48-TQFP (7x7) - drop-in alternate package | 48-VQFN (7x7) - same |
| Flash Memory | 64 KB | 128 KB | 256 KB | 32 KB | 64 KB (same die) | 64 KB |
| SRAM | 8 KB | 16 KB | 32 KB | 4 KB | 8 KB | 8 KB |
| Core / Frequency | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| CAN-FD | Yes | Yes | Yes | Yes | Yes | No (E-series) |
| 5V Tolerant I/O | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C (AUT suffix) | -40C to +105C |
Key Differentiators
- 5V tolerant I/O vs most Cortex-M0+ competitors (vs STM32G030F6P6 (STMicro))
- Integrated CAN-FD in 48-pin VQFN (vs ATSAMC20E16A-MNT (E-series))
- Drop-in upgrade path to 256 KB Flash (vs ATSAMC20G15A-MUT (32 KB Flash))
Design Notes
Place a 100 nF X7R ceramic capacitor on each VDDIO pin and a 1 uF X7R ceramic capacitor on VDDIN, with traces as short as possible. Add a 4.7 uF bulk capacitor at the regulator output to handle SERCOM and ADC transient loads. The internal voltage regulator generates VDDCORE from VDDIN; ensure VDDCORE decoupling per the SAM C20 datasheet reference schematic. Per Microchip SAM C20 datasheet DS60001579, decoupling layout is critical - placing the bulk capacitor more than 5 mm from the IC can introduce regulator instability.
The 48-pin VQFN package has an exposed thermal pad (pin 49) that MUST be soldered to a continuous ground copper pour to meet the datasheet's thermal specifications. For applications with sustained active current or high SERCOM bus utilization, design the PCB with at least 100 mm^2 of ground copper connected to the EP. This reduces junction temperature rise and provides a low-impedance ground reference for the ADC and CAN-FD analog domains. The recommended PCB footprint is defined in section 7 of the SAM C20 datasheet.
Do not skip the NVMCTRL (Flash controller) wait-state configuration when running the core at 48 MHz - the Flash requires NVMCTRL_CTRLB.RWS bits set per the NVM operating mode. Leaving these bits at default causes incorrect Flash reads and silent firmware corruption. Also enable the APBx peripheral clocks in the PMUX/PMC before accessing SERCOM, ADC, or TCC registers, or the peripherals will appear to hang. Finally, configure the GCLK generators before enabling peripherals that depend on them (ADC, SERCOM, CAN).
Separate analog and digital ground planes on a 4-layer PCB, joining them at a single point under the MCU exposed pad. Keep the SWD/SWCK traces (PA29/PA30) short (< 50 mm) and avoid routing them parallel to high-frequency SERCOM or PWM lines. Place the 32.768 kHz crystal (if used for RTC) within 5 mm of the XIN/XOUT pins, with a ground guard trace on each side. Per Microchip SAM C20 datasheet layout guidelines, the ADC analog inputs should be routed away from PWM outputs and switching signals.
Compliance Information
RoHS compliant per Microchip product page. Standard industrial grade (not AEC-Q100 qualified); use ATSAMC20G16A-AUT suffix variants for automotive applications.
