ATSAMC21G18A-AUT - 256KB Flash 48MHz Cortex-M0+ MCU | Microchip
MPN: ATSAMC21G18A-AUT ✓ Hoạt độngATSAMC21G18A-AUT Tóm tắt
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ is the smallest and most energy-efficient core in the Cortex-M family, designed for deeply embedded, deterministic 32-bit applications. It belongs to the broader microcontroller (MCU) hierarchy (microcontroller -> embedded processor -> semiconductor IC) and supersedes legacy 8/16-bit architectures by adding a 32-bit datapath, NVIC, and modern toolchain support while retaining ultra-low active and sleep currents. The SAM C21 series targets industrial and commercial designs in electrically noisy environments.
Key features of the ATSAMC21G18A-AUT include: SERCOM (Serial Communication Interface) modules that can be independently configured as UART, SPI, or I2C; a CAN-FD controller for high-bandwidth automotive networking; a 12-bit ADC, 10-bit DAC, and analog comparators; PWM timers with complementary outputs and dead-time insertion for motor control; and 5V-tolerant I/O allowing direct interface to legacy 5V peripherals without level shifters.
On the architecture side, the device uses the Cortex-M0+ v6M instruction set with a 2-stage pipeline, single-cycle I/O port access, and tightly-coupled SRAM for deterministic interrupt response. The CAN-FD peripheral supports ISO 11898-1:2015 frames with up to 64-byte payloads, and the SERCOM engine allows flexible pin mapping via the I/O multiplexing matrix.
Typical applications include industrial automation (sensor hubs, PLC I/O modules), automotive body and chassis electronics (using CAN-FD), building automation (HVAC, lighting controllers), home appliances, and low-cost motor control such as small BLDC or stepper drivers. AEC-Q100 grade 1 qualification also enables under-hood and dashboard deployment.
When designing with this MCU, plan the I/O multiplexing early because SERCOM and timer functions share mapping; Microchip's MPLAB Harmony Configurator (MCC) pin manager simplifies assignment. The 5V-tolerant pins tolerate but do not drive 5V outputs, so external level shifting is required when communicating with true 5V peripherals.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21G18A-AUT — 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 ATSAMC21G18A-AUT (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, SERCOM Modules, SRAM.
ATSAMC21G18A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21G18A-MUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21G18A-AUT Tỷ lệ tối đa & tính chất điện
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum Clock Speed | 48 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| EEPROM Emulation Region | 8 KB independent self-programmable Flash |
| RAM Size | 32 KB SRAM |
| Điện áp cung cấp | 2.7 V to 5.5 V |
| I/O Voltage Tolerance | 5V-tolerant digital I/O |
| ADC | 12-bit |
| DAC | 10-bit |
| Communication Interfaces | SERCOM (UART/SPI/I2C), CAN-FD, I2S |
| Hộp | 48-TQFP (7x7 mm) |
| Nhiệt độ hoạt động | -40C to +125C (automotive grade) |
| Kiểu lắp đặt | Surface Mount |
| AEC-Q100 | Qualified (Grade 1, automotive) |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân ATSAMC21G18A-AUT
| Chân 1 | PA00 — General purpose I/O / SERCOM pad |
| Chân 2 | PA01 — General purpose I/O / SERCOM pad |
| Chân 3 | PA02 — General purpose I/O / ADC input |
| Chân 4 | PA03 — General purpose I/O / ADC reference |
| Chân 5 | GND — Ground |
| Chân 6 | VDD |
| Chân 7 | PA04 — General purpose I/O / SERCOM pad |
| Chân 8 | PA05 — General purpose I/O / SERCOM pad |
| Chân 9 | PA06 — General purpose I/O / SERCOM pad |
| Chân 10 | PA07 — General purpose I/O / SERCOM pad |
| Chân 11 | PA08 — General purpose I/O / SERCOM pad |
| Chân 12 | PA09 — General purpose I/O / SERCOM pad |
| Chân 13 | PA10 — General purpose I/O / SERCOM pad |
| Chân 14 | PA11 — General purpose I/O / SERCOM pad |
| Chân 15 | VDDIO — I/O voltage supply |
| Chân 16 | GND — Ground |
| Chân 17 | PA12 — General purpose I/O / SERCOM pad |
| Chân 18 | PA13 — General purpose I/O / SERCOM pad |
| Chân 19 | PA14 — General purpose I/O / SERCOM pad |
| Chân 20 | PA15 — General purpose I/O / SERCOM pad |
| Chân 21 | PA16 — General purpose I/O / SERCOM pad |
| Chân 22 | PA17 — General purpose I/O / SERCOM pad |
| Chân 23 | PA18 — General purpose I/O / SERCOM pad |
| Chân 24 | PA19 — General purpose I/O / SERCOM pad |
| Chân 25 | PA20 — General purpose I/O / SERCOM pad |
| Chân 26 | PA21 — General purpose I/O / SERCOM pad |
| Chân 27 | PA22 — General purpose I/O / SERCOM pad |
| Chân 28 | PA23 — General purpose I/O / SERCOM pad |
| Chân 29 | PA24 — General purpose I/O / SERCOM pad |
| Chân 30 | PA25 — General purpose I/O / SERCOM pad |
| Chân 31 | GND — Ground |
| Chân 32 | VDD — Core voltage regulator input |
| Chân 33 | PB00 — General purpose I/O / SERCOM pad |
| Chân 34 | PB01 — General purpose I/O / SERCOM pad |
| Chân 35 | PB02 — General purpose I/O / SERCOM pad |
| Chân 36 | PB03 — General purpose I/O / SERCOM pad |
| Chân 37 | PB04 — General purpose I/O / SERCOM pad |
| Chân 38 | PB05 — General purpose I/O / SERCOM pad |
| Chân 39 | PB06 — General purpose I/O / SERCOM pad |
| Chân 40 | PB07 — General purpose I/O / SERCOM pad |
| Chân 41 | PB08 — General purpose I/O / SERCOM pad |
| Chân 42 | PB09 — General purpose I/O / SERCOM pad |
| Chân 43 | PB10 — General purpose I/O / SERCOM pad |
| Chân 44 | PB11 — General purpose I/O / SERCOM pad |
| Chân 45 | VDDIO — I/O voltage supply |
| Chân 46 | GND — Ground |
| Chân 47 | NRST — Reset input (active-low) |
| Chân 48 | SWDIO — SWD debug data |
Ứng dụng tiêu biểu
ATSAMC21G18A-AUT phù hợp cho 6 Áp dụngs: Automotive Body Electronics with CAN-FD, Industrial Sensor Hubs and PLC I/O, BLDC and Stepper Motor Control, Building Automation (HVAC and Lighting), Home Appliance User Interface Controllers, Automotive Dashboard and Instrument Panels.
Automotive Body Electronics with CAN-FD
The ATSAMC21G18A-AUT's integrated CAN-FD controller supporting ISO 11898-1:2015 frames with up to 64-byte payloads makes it ideal for automotive body electronics such as seat controllers, mirror adjusters, and door modules. The AEC-Q100 Grade 1 qualification ensures reliable operation at -40C to +125C under hood and cabin thermal stress. The 256KB Flash accommodates J1939 and CANopen protocol stacks alongside application code.
Được đề xuất
Industrial Sensor Hubs and PLC I/O
The 5V-tolerant I/O and SERCOM modules of the ATSAMC21G18A-AUT allow direct interfacing with industrial 5V sensors, optocouplers, and actuator drivers without level shifters. The 12-bit ADC with internal reference and the 10-bit DAC support analog signal conditioning for 4-20mA loops and bridge sensors. The 32KB SRAM handles protocol stacks for Modbus RTU or IO-Link while the MPU isolates safety-critical tasks.
Được đề xuất
BLDC and Stepper Motor Control
The PWM timers with complementary outputs and dead-time insertion in the ATSAMC21G18A-AUT directly drive three-phase BLDC motor inverters or stepper motor bridges. The 48MHz core executes field-oriented control (FOC) algorithms at 10kHz switching frequency with margin to spare. The QFP package's exposed pad provides thermal relief for continuous motor drive operation.
Được đề xuất
Building Automation (HVAC and Lighting)
The ATSAMC21G18A-AUT's combination of CAN-FD, SERCOM, and analog peripherals suits building automation controllers for HVAC dampers, lighting dimmers, and occupancy sensors. The 5V tolerance allows direct interface with triac drivers and legacy building automation buses. The AEC-Q100 qualification enables deployment in equipment rooms with extended temperature ranges.
Được đề xuất
Home Appliance User Interface Controllers
The Peripheral Touch Controller (PTC) in the ATSAMC21G18A-AUT supports capacitive touch buttons and sliders for appliance front panels without external touch ICs. The SERCOM modules connect to Wi-Fi/BLE modules for smart appliance connectivity while CAN-FD interfaces with the main appliance control board. The 8KB EEPROM emulation Flash stores user settings and calibration data.
Được đề xuất
Automotive Dashboard and Instrument Panels
The ATSAMC21G18A-AUT's AEC-Q100 Grade 1 qualification and CAN-FD capability suit automotive dashboard controllers that aggregate data from body and chassis modules. The 5V-tolerant I/O drives segment LCDs or LED indicators directly, while SERCOM channels connect to rotary encoders and button matrices. The -40C to +125C operating range handles under-dash thermal extremes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21G18A-AUT — 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 | ATSAMC21G18A-AU |
|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology |
| Core Processor | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Speed | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB |
| CAN-FD | Yes | Yes |
| 5V Tolerant I/O | Yes | Yes |
| AEC-Q100 Qualification | Yes (Grade 1) | No (industrial) |
| Operating Temperature | -40C to +125C | -40C to +85C |
Bảo phân biệt quan trọng
- AEC-Q100 Grade 1 automotive qualification (vsATSAMC21G18A-AU (industrial grade))
- Integrated CAN-FD controller (vsATSAMD21G18A-AU (USB, no CAN))
- 5V-tolerant digital I/O (vsTypical 3.3V Cortex-M0+ MCUs)
Ghi chú thiết kế
The ATSAMC21G18A-AUT operates from 2.7V to 5.5V with separate VDDIO and VDD pins for I/O and core supplies. Place 100nF decoupling capacitors as close as possible to each VDD and VDDIO pin, with a bulk 10uF capacitor on the main supply rail. The internal voltage regulator requires adequate bulk capacitance on VDDIN to handle transient load steps during flash programming.
The 48-pin TQFP package has a 0.5mm pitch and 7x7mm body size. Route the SWD signals (SWDIO, SWCLK) away from high-frequency switching nodes and provide a ground reference for impedance control. The SERCOM and timer functions share pins through an I/O multiplexing matrix - plan pin assignments early using Microchip's MPLAB Harmony Configurator pin manager.
The 5V-tolerant I/O pins tolerate 5V input but only drive 3.3V output levels - external level shifters are required for true 5V peripheral communication. The CAN-FD peripheral requires an external transceiver such as the MCP2562FD; the MCU only handles the protocol layer. The 8KB EEPROM emulation Flash is independent of the main Flash and must be managed separately for wear leveling.
The ATSAMC21G18A-AUT in the 48-TQFP package has a thermal resistance of approximately 60 C/W (theta_JA) on a standard 4-layer JEDEC test board. At 48MHz active mode with all peripherals running, power consumption is typically 8-10mA. In standby with RTC running, consumption drops to under 10uA. The AEC-Q100 Grade 1 qualification ensures operation from -40C to +125C ambient.
Thông tin tuân thủ
AEC-Q100 Grade 1 qualified per Microchip product page. RoHS and REACH compliant. Lead-free packaging. Halogen-free status not explicitly stated in available data.
