ATSAMC21E16A-MNT - 48MHz Cortex-M0+ MCU, 64KB Flash, CAN-FD | Microchip
MPN: ATSAMC21E16A-MNT ✓ Hoạt độngATSAMC21E16A-MNT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals on one IC. The Cortex-M0+ is the smallest and most energy-efficient member of the ARM Cortex-M family, designed for deterministic embedded control in cost-sensitive applications. Within the broader hierarchy, this part is a microcontroller -> embedded processor -> semiconductor device, and the SAM C21 family specifically targets noisy industrial environments requiring robust 5 V I/O tolerance.
Key features of the ATSAMC21E16A-MNT include 6 SERCOM serial communication channels (each configurable as UART, SPI, or I2C), a full-speed USB 2.0 device interface, a 12-channel Event System for inter-peripheral signalling without CPU intervention, and a Self-Programming Flash controller for in-field firmware updates. The 5 V tolerant I/O simplifies interfacing to legacy 5 V sensors and industrial buses, eliminating the need for external level shifters. The integrated PTC supports up to 256 mutual-capacitance touch channels for robust button, slider, and proximity sensing in the presence of moisture and noise.
The device operates from a 2.7 V to 5.5 V supply, supports -40 °C to +105 °C industrial temperature range, and includes functional safety (FuSa) features such as a dedicated CRC, a Windowed Watchdog Timer (WWDT), and a Memory Protection Unit (MPU) for IEC 60730 Class B compliance. The Cortex-M0+ core executes the Thumb instruction set with hardware single-cycle multiplication, delivering 0.93 DMIPS/MHz while consuming as little as 50 µA/MHz in active mode.
Typical applications include industrial CAN-FD sensor nodes, building automation controllers, automotive body and chassis ECUs (sub-systems), USB-connected human-machine interface (HMI) modules, and capacitive-touch user interfaces for appliances. The wide 5 V tolerance and robust ESD ratings (HBM 4 kV, CDM 500 V) make it particularly suitable for factory-floor equipment, motor-control peripherals, and HVAC controllers.
When designing with this MCU, place a 100 nF decoupling capacitor adjacent to each VDD pin and route the analog supply (VDDANA) through a ferrite bead from the digital supply to preserve ADC accuracy. Configure unused pins as outputs driven low to minimize current leakage in battery-backed applications, and ensure JTAG/SWD traces are length-matched and kept under 50 mm to avoid programming failures.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21E16A-MNT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMC21E16A-MNT (cùng hình factor và footprint) — khác nhau ở ADC, Package, Program Memory (Flash), RoHS Status, SRAM.
ATSAMC21E17A-MNT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21E18A-MNT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21E15A-MNT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC20E16A-MNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21E16A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21E16A-MNT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit, single-core) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Voltage Tolerance | 5 V tolerant |
| Khoảng nhiệt độ hoạt động | -40 °C to +105 °C |
| Hộp | 32-pin VQFN (5x5 mm) |
| Kiểu lắp đặt | Surface Mount |
| CAN-FD Controller | Yes (1 channel) |
| USB Interface | USB 2.0 Full-Speed Device |
| SERCOM Channels | 6 (configurable as UART/SPI/I2C) |
| ADC | 12-bit, up to 1 Msps |
| Sigma-Delta ADC | 16-bit |
| Peripheral Touch Controller (PTC) | Yes (supports self/mutual capacitance) |
| Event System Channels | 12 |
| DMA Channels | 12 |
| Watchdog Timer | Windowed Watchdog Timer (WWDT) |
| Memory Protection Unit (MPU) | Yes |
| Functional Safety (FuSa) | IEC 60730 Class B ready |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAMC21E16A-MNT
| Chân 1 | PA00 — GPIO / XIN32 (external 32.768 kHz crystal input) |
| Chân 2 | PA01 — GPIO / XOUT32 (external 32.768 kHz crystal output) |
| Chân 3 | PA02 — GPIO / AIN0 (ADC input) |
| Chân 4 | PA03 — GPIO / AIN1 / VREFA (ADC reference voltage) |
| Chân 5 | PA04 — GPIO / AIN2 |
| Chân 6 | PA05 — GPIO / AIN3 |
| Chân 7 | PA06 — GPIO / AIN4 |
| Chân 8 | PA07 — GPIO / AIN5 |
| Chân 9 | VDDIO — Digital I/O supply voltage (2.7-5.5 V) |
| Chân 10 | GND — Ground reference for digital I/O |
| Chân 11 | PA08 — GPIO / SERCOM0 PAD0 / I2C SDA |
| Chân 12 | PA09 — GPIO / SERCOM0 PAD1 / I2C SCL |
| Chân 13 | PA10 — GPIO / SERCOM2 PAD0 / CAN0 TX |
| Chân 14 | PA11 — GPIO / SERCOM2 PAD1 / CAN0 RX |
| Chân 15 | PA14 — GPIO / SERCOM3 PAD0 / TC0 WO0 |
| Chân 16 | PA15 — GPIO / SERCOM3 PAD1 / TC0 WO1 |
| Chân 17 | PA16 — GPIO / SERCOM1 PAD0 / I2S SCK |
| Chân 18 | PA17 — GPIO / SERCOM1 PAD1 / I2S FS |
| Chân 19 | PA18 — GPIO / SERCOM1 PAD2 / I2S SDO |
| Chân 20 | PA19 — GPIO / SERCOM1 PAD3 / I2S SDI |
| Chân 21 | PA22 — GPIO / SERCOM5 PAD0 / TC1 WO0 |
| Chân 22 | PA23 — GPIO / SERCOM5 PAD1 / TC1 WO1 |
| Chân 23 | PA24 — GPIO / USB D- |
| Chân 24 | PA25 — GPIO / USB D+ |
| Chân 25 | PA27 — GPIO / SWDIO (debug data) |
| Chân 26 | PA28 — GPIO / SWCLK (debug clock) |
| Chân 27 | RESET — Reset input, active-low |
| Chân 28 | VDDIN — Main voltage regulator input (2.7-5.5 V) |
| Chân 29 | VDDANA — Analog supply voltage for ADC/DAC |
| Chân 30 | GND — Ground reference for analog |
| Chân 31 | GND — Ground reference for digital core |
| Chân 32 | VDDCORE — Internal core voltage (decoupling only) |
Ứng dụng tiêu biểu
ATSAMC21E16A-MNT phù hợp cho 6 Áp dụngs: Industrial CAN-FD Sensor Node, Building Automation Controller, Capacitive-Touch HMI Module, USB-Connected Sensor Bridge, Sub-System Automotive Body ECU, Battery-Backed Industrial Data Logger.
Industrial CAN-FD Sensor Node
The ATSAMC21E16A-MNT's integrated CAN-FD controller compliant with ISO 11898-1:2015 supports payloads up to 64 bytes and data-phase bit rates up to 8 Mbps, making it ideal for industrial sensor nodes that aggregate field data from pressure, flow, and temperature transmitters. The 5 V tolerant I/O simplifies direct interfacing to legacy 4-20 mA loops and 5 V industrial sensors without external level shifters. The 12-bit 1 Msps ADC and the integrated 16-bit Sigma-Delta converter allow simultaneous high-speed and high-precision analog measurements, while the 48 MHz Cortex-M0+ core has ample headroom to run CANopen or J1939 stacks concurrently with sensor-fusion algorithms. The exposed pad of the VQFN-32 package provides low thermal resistance for continuous operation at +105 °C ambient in factory cabinets.
Được đề xuất
Building Automation Controller
The 5 V tolerant I/O, 6 SERCOM channels (each configurable as UART/SPI/I2C), and integrated Peripheral Touch Controller (PTC) make the ATSAMC21E16A-MNT a strong fit for building-automation controllers driving HVAC actuators, lighting dimmers, and occupancy sensors. The PTC supports up to 256 mutual-capacitance touch channels with built-in moisture and noise immunity, enabling robust glass-fronted control panels in commercial buildings. The Windowed Watchdog Timer (WWDT), hardware CRC, and Memory Protection Unit (MPU) satisfy IEC 60730 Class B functional-safety requirements for unattended domestic appliances. USB 2.0 Full-Speed device support simplifies commissioning via standard USB-host interfaces on technician laptops, eliminating the need for proprietary programming pods in field service.
Được đề xuất
Capacitive-Touch HMI Module
The built-in Peripheral Touch Controller (PTC) on the ATSAMC21E16A-MNT supports self-capacitance and mutual-capacitance sensing for buttons, sliders, and proximity wake-up functions - all without an external touch IC. Combined with the 12-bit ADC for analog front-panel measurements and the 12-channel Event System for hardware-driven button debouncing, the MCU delivers a complete human-machine interface (HMI) controller in a single chip. The 32-pin VQFN (5x5 mm) package fits behind small glass panels in appliance and white-goods designs. Functional safety features including hardware CRC and WWDT simplify compliance with IEC 60335 safety standards for unattended household appliances.
Được đề xuất
USB-Connected Sensor Bridge
The integrated USB 2.0 Full-Speed device interface on the ATSAMC21E16A-MNT eliminates the need for an external bridge chip when connecting industrial sensors to PC-based data-acquisition systems. The 5 V tolerant USB D+/D- pins interface directly with standard USB connectors, while the SERCOM channels can simultaneously drive UART- or SPI-based sensors. The 8 KB SRAM is sufficient to buffer multi-channel sensor data before bulk USB transfers, and the 64 KB Flash accommodates full USB device stacks (CDC, HID, vendor-class) plus application firmware. The wide 2.7-5.5 V supply range allows the bridge to be powered directly from the USB VBUS rail at 5 V without additional regulation.
Được đề xuất
Sub-System Automotive Body ECU
Although the standard ATSAMC21E16A-MNT is industrial-grade, the +105 °C operating temperature and 5 V tolerant I/O make it suitable for non-safety-critical automotive body and chassis sub-systems such as lighting controllers, mirror-adjust modules, and HVAC panel drivers. The Cortex-M0+ core's deterministic interrupt latency simplifies LIN-slave firmware, while the CAN-FD controller provides a migration path from classic CAN to next-generation in-vehicle networks. For AEC-Q100 qualified designs, the automotive variant ATSAMC21E16A-MNTVAO is available with PPAP documentation and full automotive reliability testing per the device family datasheet.
Được đề xuất
Battery-Backed Industrial Data Logger
The low-power Run, Wait, and Sleep modes of the ATSAMC21E16A-MNT - combined with on-chip RTC, Event System wake-on-interrupt, and battery-domain backup registers - support multi-year battery-backed operation in remote industrial data loggers. The 12-bit 1 Msps ADC captures fast transients, while the 16-bit Sigma-Delta converter delivers 16-bit effective resolution for slow high-precision channels like thermocouples. The 64 KB Flash stores several months of compressed sensor history, and the integrated CAN-FD or USB interface enables periodic data offload to a gateway. The WWDT, CRC, and MPU enable unattended IEC 60730 Class B compliance for unattended logger deployments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21E16A-MNT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMC21E17A-MNT | ATSAMC21E18A-MNT | ATSAMC21E15A-MNT | ATSAMC20E16A-MNT | ATSAMC21E16A-AUT |
|---|---|---|---|---|---|---|
| Package | VQFN-32 (5x5 mm) | VQFN-32 (5x5 mm) - same | VQFN-32 (5x5 mm) - same | VQFN-32 (5x5 mm) - same | VQFN-32 (5x5 mm) - same | TQFP-32 (7x7 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 64 KB | 128 KB | 256 KB | 32 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 16 KB | 32 KB | 4 KB | 8 KB | 8 KB |
| CAN-FD Controller | Yes (1 channel) | Yes (1 channel) | Yes (1 channel) | Yes (1 channel) | No | Yes (1 channel) |
| USB 2.0 FS Device | Yes | Yes | Yes | Yes | No | Yes |
| Peripheral Touch Controller (PTC) | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C |
Bảo phân biệt quan trọng
- Integrated CAN-FD plus USB 2.0 FS Device in VQFN-32 (5x5 mm) (vsATSAMC20E16A-MNT)
- Memory upgrade path within same VQFN-32 footprint (vsATSAMC21E15A-MNT)
- Industrial +105 °C operating temperature in tiny 5x5 mm package (vsATSAMC21E16A-AUT)
Ghi chú thiết kế
The ATSAMC21E16A-MNT requires two supply rails: VDDIN (2.7-5.5 V main input) and VDDANA (analog supply, must track VDDIN within ±0.3 V). Place a 100 nF X7R 0402 ceramic decoupling capacitor adjacent to each VDD pin and a single 4.7 µF bulk capacitor within 5 mm. Route the analog supply through a ferrite bead (600 Ω at 100 MHz, BLM18PG601) from VDDIN to VDDANA, with separate decoupling on each side, to preserve ADC SNR. The exposed thermal pad must be soldered to a continuous ground plane on the top layer with at least 8 thermal vias to the inner ground plane for heat dissipation at high CPU loads.
Keep the 32 kHz crystal traces within 5 mm of the XIN32/XOUT32 pins, with a guard ring tied to analog ground to reduce noise injection into the RTC. For the SWD/SWCK debug interface (PA27/PA28), keep trace lengths under 50 mm and route them over a continuous ground plane to avoid programming failures in production. If the PTC is used for capacitive touch, isolate the touch-sensor traces with a hatched ground pour and avoid running them parallel to noisy switching traces or under the crystal oscillator. Verify touch performance with moisture, water droplets, and glove-finger scenarios before finalizing the layout.
The USB D+/D- pins (PA24/PA25) require a 90 Ω differential impedance on the PCB, with traces matched within 0.5 mm length. Place the USBLC6-2SC6 ESD protection array within 3 mm of the USB connector, with its ground paddle connected to the chassis ground through a ferrite bead. For CAN-FD (PA10/PA11), use twisted-pair cabling with 120 Ω termination at each end of the bus, and place the MCP2562FD transceiver within 10 mm of the MCU to minimize stub lengths. The CAN bus common-mode choke (e.g., DLW32SH101XK2) reduces EMI from the 8 Mbps data-phase transitions.
Do not leave unused GPIO pins floating - configure them as outputs driven low to minimize current leakage (each floating input can leak 1-10 µA, totalling 50-100 µA for 10 unused pins). The SAM C21's brown-out detector (BOD) must be enabled at boot to prevent Flash corruption during supply dips below 2.7 V. When using the SERCOM peripheral for I2C, ensure external 4.7 kΩ pull-ups are present because the SAM C21's internal pull-ups are too weak for 400 kHz Fast-Mode operation. Finally, when migrating from the SAM C20 to the SAM C21, verify the CAN-FD peripheral interrupt vector assignments as they differ from the SAM C20's CAN0 register map.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product environmental certification. Industrial grade -40 °C to +105 °C; AEC-Q100 automotive qualification available on the VAO variant only.
