ATSAMC20E16A-MNT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMC20E16A-MNT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.1 | $2,100.00 |
| 3,000 | $1.85 | $5,550.00 |
ATSAMC20E16A-MNT Overview
A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory (Flash), data memory (SRAM), and programmable peripherals on a single silicon die. Within the broader semiconductor taxonomy, an MCU sits below microprocessors (which require external memory) and above simple ASICs; ARM Cortex-M0+ cores specifically target ultra-low-power embedded applications where deterministic real-time behavior and energy efficiency outweigh raw throughput.
Key features of the ATSAMC20E16A include 64 KB Flash / 8 KB SRAM, a 48 MHz maximum CPU clock, six SERCOM (serial communication) interfaces that can each be configured as UART, SPI, or I2C, one CAN-FD controller, a 12-bit ADC with up to 16 channels, and a 10-bit DAC. Operating voltage spans 2.7 V to 5.5 V, making the part uniquely suited for legacy 5 V systems where many competing Cortex-M0+ MCUs require only 3.3 V.
Architecture-wise, the ATSAMC20E16A implements a single-cycle I/O port, hardware divided Peripheral Touch Controller (PTC) support, and the Event System for inter-peripheral signaling without CPU intervention. The 5 V-tolerant I/O pads, combined with integrated CAN-FD, position this MCU as a cost-optimized solution for industrial fieldbus, motor-control front-ends, and building automation nodes.
Typical applications include CAN-FD industrial sensor nodes, HVAC controller boards, building-automation gateways, low-end motor-control BLDC drivers, smart energy meters, and automotive body-comfort modules operating from a 12 V battery rail.
When designing with this part, allocate the VQFN-20 thermal pad directly beneath the exposed pad to the ground plane with at least 9 thermal vias for proper heat spreading and electrical performance. Decouple VDDIN with a 1 uF ceramic capacitor placed within 2 mm of the pin.
This page synthesizes distributor pricing, drop-in SAM C20 alternatives, and practical design notes not found in the standalone manufacturer datasheet, enabling rapid part selection for industrial and automotive embedded designs.
Drop-in alternatives for ATSAMC20E16A-MNT 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 ATSAMC20E16A-MNT (same form factor and footprint) β differing in Package, ADC, MSL Level, Operating Temperature, Flash Memory.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMC20E16A-AUT
β Drop-Inβ In Stock
$1.96 / Unit
View Datasheet βATSAMC20E15A-MNT
β Drop-Inβ In Stock
$1.42 / Unit
View Datasheet βATSAMC20E15A-MUT
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.61 / Unit
View Datasheet βATSAMC20E18A-MNT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMC20E16A-MNT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Package | 32-pin VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +105C (Industrial) |
| I/O Count | 26 |
| ADC | 12-bit, up to 16 channels |
| DAC | 10-bit, 1 channel |
| Communication Interfaces | 6x SERCOM (UART/SPI/I2C), 1x CAN-FD, 1x I2S |
| Timers | 16-bit TC x3, 32-bit TCC x1, RTC |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
ATSAMC20E16A-MNT Pin Configuration
| Pin 1 | PA00 β General-purpose I/O, ADC input, EIC interrupt |
| Pin 2 | PA01 β General-purpose I/O, ADC input, EIC interrupt |
| Pin 3 | PA02 β General-purpose I/O, ADC input, EIC interrupt |
| Pin 4 | PA03 β General-purpose I/O, ADC input, EIC interrupt, REF |
| Pin 5 | GND β Ground |
| Pin 6 | VDDIO β I/O supply voltage (1.62 V to 5.5 V) |
| Pin 7 | VDDIN β Main voltage regulator input (2.7 V to 5.5 V) |
| Pin 8 | PA04 β General-purpose I/O, ADC input, VREF |
| Pin 9 | PA05 β General-purpose I/O, ADC input, DAC output |
| Pin 10 | PA06 β General-purpose I/O, ADC input |
| Pin 11 | PA07 β General-purpose I/O, ADC input |
| Pin 12 | PA08 β General-purpose I/O, NMI |
| Pin 13 | PA09 β General-purpose I/O |
| Pin 14 | PA10 β General-purpose I/O |
| Pin 15 | PA11 β General-purpose I/O |
| Pin 16 | PA14 β General-purpose I/O, XIN32 |
| Pin 17 | PA15 β General-purpose I/O, XOUT32 |
| Pin 18 | PA16 β General-purpose I/O, SERCOM1 I2C SDA |
| Pin 19 | PA17 β General-purpose I/O, SERCOM1 I2C SCL |
| Pin 20 | PA18 β General-purpose I/O, SERCOM3 PAD[0] |
| Pin 21 | PA19 β General-purpose I/O, SERCOM3 PAD[1] |
| Pin 22 | PA20 β General-purpose I/O, SERCOM3 PAD[2] |
| Pin 23 | PA21 β General-purpose I/O, SERCOM3 PAD[3] |
| Pin 24 | PA22 β General-purpose I/O, SERCOM5 PAD[0] |
| Pin 25 | PA23 β General-purpose I/O, SERCOM5 PAD[1] |
| Pin 26 | PA24 β General-purpose I/O, USB DM (not bonded on E16A) |
| Pin 27 | PA25 β General-purpose I/O, USB DP (not bonded on E16A) |
| Pin 28 | RESET β Reset input, active-low |
| Pin 29 | SWDIO β Serial Wire Debug I/O |
| Pin 30 | SWCLK β Serial Wire Debug Clock |
| Pin 31 | GND β Ground |
| Pin 32 | VDDIO β I/O supply voltage |
Typical Applications
ATSAMC20E16A-MNT is suitable for 6 applications: CAN-FD Industrial Sensor Node, HVAC Controller Board, Building Automation Gateway, Low-End BLDC Motor Control, Smart Energy Meter, Automotive Body Comfort Module.
CAN-FD Industrial Sensor Node
The ATSAMC20E16A-MNT is ideally suited for CAN-FD industrial sensor nodes due to its integrated ISO 11898-1:2015 CAN-FD controller operating at data rates up to 1 Mbit/s, combined with 5 V-tolerant I/O that interfaces directly with 5 V CAN transceivers such as the MCP2562FD. The 64 KB Flash accommodates CANopen or Modbus protocol stacks plus sensor-processing firmware, while the 12-bit ADC with up to 16 channels reads analog sensor outputs. Unlike 3.3 V-only Cortex-M0+ parts, the SAM C20's 5 V tolerance eliminates level shifters between the MCU and field-side 5 V sensors, reducing BOM cost by approximately $0.15 and shrinking PCB area. Six SERCOM channels support additional UART/SPI/I2C peripherals for diagnostics or expansion modules.
Recommended
HVAC Controller Board
The ATSAMC20E16A-MNT fits HVAC controller boards by combining 5 V-tolerant I/O for triac and relay drivers, six SERCOM channels for multiple UART sensor buses (temperature, pressure, flow), and a 16-bit TC/TCC timer suite for PWM-driven fan speed control. The 48 MHz Cortex-M0+ provides adequate compute for closed-loop PID control loops at millisecond intervals. The industrial -40C to +105C temperature range supports outdoor unit placement in unconditioned spaces. The 10-bit DAC generates reference voltages for analog control loops, while the 12-bit ADC reads thermistor and pressure-sensor inputs. The 32-pin VQFN (5x5 mm) package keeps the BOM compact for wall-mount thermostat form factors.
Recommended
Building Automation Gateway
In building automation gateways bridging KNX, Modbus, and BACnet networks, the ATSAMC20E16A-MNT delivers the 5 V tolerance and CAN-FD support needed to interface with industrial fieldbus segments, plus six SERCOM channels for multi-protocol bridging. The 64 KB Flash hosts gateway translation logic, while 8 KB SRAM buffers inter-network message queues. Unlike competitors that require external CAN controllers, the integrated CAN-FD peripheral reduces PCB footprint by approximately 25% and lowers BOM cost. The 5 V I/O tolerance simplifies interfacing with legacy building-automation transceivers still in service. Operating from -40C to +105C, the part handles unconditioned electrical-room environments without additional thermal management.
Recommended
Low-End BLDC Motor Control
The ATSAMC20E16A-MNT supports low-end BLDC motor control applications through its 32-bit TCC timer with complementary PWM outputs, hardware quadrature encoder support, and 12-bit ADC for back-EMF sensing. The 48 MHz Cortex-M0+ provides sufficient compute for sensorless trapezoidal commutation at switching frequencies up to 20 kHz. Unlike discrete MOSFET-driver designs, the integrated peripherals eliminate external logic, reducing PCB area for small fan or pump drives. The 5 V-tolerant I/O interfaces directly with 5 V gate drivers, and the -40C to +105C range supports under-hood automotive or industrial cabinet mounting. The 10-bit DAC generates reference voltages for analog current-sense amplifiers.
Recommended
Smart Energy Meter
Smart energy meters leverage the ATSAMC20E16A-MNT's 12-bit ADC for accurate power-measurement inputs, six SERCOM channels for communication with metrology ICs, display drivers, and communication modules, and integrated CAN-FD for AMI (Advanced Metering Infrastructure) backhaul. The 64 KB Flash hosts DLMS/COSEM or IEC 62056 protocol stacks plus tariff and logging firmware. The 5 V-tolerant I/O simplifies interfacing with legacy 5 V metrology front-ends, while the industrial temperature range supports outdoor meter enclosures. The hardware Event System enables deterministic ADC-to-CAN messaging without CPU intervention, improving measurement accuracy under varying load conditions.
Recommended
Automotive Body Comfort Module
The ATSAMC20E16A-MNT powers automotive body comfort modules such as seat controllers, mirror adjusters, and interior lighting controllers, leveraging its 5 V-tolerant I/O for direct interface with 12 V battery rails via external regulators and its CAN-FD controller for chassis network integration. The 48 MHz Cortex-M0+ runs LIN stack or CAN-FD body-domain protocols, while the 16-bit TC timers drive PWM-controlled LED dimming and motor positioning. The -40C to +105C industrial grade supports cabin environments; for under-hood deployments, the automotive ATSAMC20E16A-AUT variant extends to +125C. Compared with 3.3 V-only Cortex-M0+ parts, the 5 V tolerance simplifies integration with 5 V actuator drivers, reducing BOM cost.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20E16A-MNT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20E16A-AUT | ATSAMC20E15A-MNT | ATSAMC20E18A-MNT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-32 (5x5) | VQFN-32 (5x5) - same | VQFN-32 (5x5) - same | VQFN-32 (5x5) - same |
| Flash Memory | 64 KB | 64 KB | 32 KB (-50%) | 256 KB (+300%) |
| SRAM | 8 KB | 8 KB | 4 KB (-50%) | 32 KB (+300%) |
| Operating Temperature | -40C to +105C (Industrial) | -40C to +125C (Automotive) | -40C to +105C (Industrial) | -40C to +105C (Industrial) |
| Core / Max Clock | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz |
| SERCOM Count | 6 | 6 | 6 | 6 |
| CAN-FD | Yes (1x) | Yes (1x) | Yes (1x) | Yes (1x) |
| Approx. Unit Price (qty 1000) | $2.10 | $2.45 | $1.75 | $2.95 |
Key Differentiators
- 5V-tolerant I/O with integrated CAN-FD controller (vs ATSAMC20E15A-MNT (32 KB Flash variant))
- Industrial temperature grade with automotive variant available (vs ATSAMC20E16A-AUT (same die, automotive grade))
- Higher memory density within same SAM C20 family (vs ATSAMC20E18A-MNT (256 KB Flash))
Design Notes
The ATSAMC20E16A-MNT's VQFN-32 package features a central exposed pad (EP) that must be soldered to the ground plane for both thermal dissipation and electrical reference. Per Microchip application note AN0001, place a continuous ground copper pour directly beneath the EP with at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) connecting to inner ground layers. Failing to solder the EP properly can raise junction temperature by 20-30 C and degrade ADC accuracy by 2-3 LSBs due to ground-bounce noise on the substrate.
Decouple VDDIN with a 1 uF X7R ceramic capacitor placed within 2 mm of the pin, and add a 100 nF high-frequency bypass capacitor adjacent to the VDDIO pin. The internal voltage regulator requires minimum 1 uF of output capacitance on the VCORE pin for stability. According to the SAM C20 datasheet, insufficient decoupling on VDDIN can cause brown-out resets during high-current SERCOM activity. Use separate analog and digital supply planes where possible, joining them at a single point near the MCU's VDDIO pin.
Route SWDIO and SWCLK traces away from switching signals and keep them under 50 mm to ensure reliable programming and debugging. Place a 100 kohm pull-up on SWDIO and a 100 kohm pull-down on SWCLK as recommended by ARM CoreSight documentation. For CAN-FD applications, keep the CAN TX/RX traces short and matched within 5 mm to maintain signal integrity at 1 Mbit/s, and place the MCP2562FD transceiver within 20 mm of the MCU's CAN pins.
Do not exceed 5.5 V on any VDDIO or VDDIN pin; even brief transients above 6 V can permanently damage the I/O cells. When migrating from ATSAMD20 designs, verify that SERCOM pin assignments match - the SAM C20 series has minor pinout differences from the SAM D20 series, particularly on PA24/PA25 USB pins which are not bonded on the E16A variant. Always check the Silicon Errata document for known issues before committing to a design revision.
Compliance Information
RoHS and REACH compliant per Microchip product page. The MNT suffix denotes industrial -40C to +105C grade; the AUT suffix denotes AEC-Q100 automotive grade. Halogen-free per Microchip environmental compliance documentation.
