ATSAMC21J18A-MUT64 - 48MHz Cortex-M0+ MCU 256KB Flash CAN-FD | Microchip
MPN: ATSAMC21J18A-MUT64 ✓ Hoạt độngATSAMC21J18A-MUT64 Tóm tắt
What is a Cortex-M0+ microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, Flash program memory, SRAM data memory, and a rich set of peripherals (ADCs, timers, communication blocks) into one device. The ARM Cortex-M0+ is an energy-efficient 32-bit core optimized for deterministic real-time embedded control. The SAM C21 family extends that core with 5V I/O tolerance and CAN-FD connectivity, which makes it particularly attractive for industrial and automotive-style noisy environments where lower-voltage MCUs require level shifters.
Key features of the ATSAMC21J18A-MUT64 include the 12-bit 1 Msps ADC with up to 20 channels, a 16-bit Sigma-Delta ADC interface option, two 24-bit timers/counters, multiple SERCOM modules configurable as UART/SPI/I2C, two CAN-FD channels, a USB 2.0 Full-Speed device interface, and an Event System for low-latency inter-peripheral signaling. The device supports 1.62V to 3.6V core operation while presenting 5V-tolerant digital I/O, simplifying designs that interface with legacy 5V logic.
The SAM C21 architecture pairs the Cortex-M0+ core with a multi-layer AHB/APB bus matrix and dedicated SERCOM instances, enabling deterministic peripheral operation. Hardware accelerated CRC, a Memory Protection Unit for secure partitioning, and the PTC touch controller provide a robust platform for capacitive-button human-machine interfaces (HMIs) and motor control.
Typical applications include industrial CAN-FD node endpoints, HVAC controllers, building automation, solar inverter monitoring, capacitive touch HMI panels, BLDC and stepper motor drive control, smart metering, and Functional Safety subsystems in IEC 60730 Class B equipment. Designers choose this part when they need deterministic Cortex-M0+ code execution, 5V I/O tolerance, and integrated CAN-FD on a single die.
When designing with the ATSAMC21J18A-MUT64, allocate adequate PCB copper under the exposed pad (EP) for thermal dissipation and ground return. Place a 100 nF decoupling capacitor within 2 mm of each VDD pin group, and follow the datasheet reference layout for the 9x9 VQFN to maintain signal integrity on SERCOM and CAN-FD lines at 1 Mbit/s.
This page synthesizes verified distributor pricing, pin-compatible alternatives drawn from the same Microchip SAM C21 family, and practical design notes derived from the Microchip SAM C21 datasheet - information not bundled on any single distributor page.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21J18A-MUT64 — 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 ATSAMC21J18A-MUT64 (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Flash Memory, SRAM.
ATSAMC21J18A-MNT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21J17A-MNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC20J18A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21G18A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC20G18A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J18A-MUT64 Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Program Flash Memory | 256 KB |
| SRAM | 32 KB |
| EEPROM Emulation Flash | 8 KB (independent self-programmable) |
| Supply Voltage (VDDIN) | 2.7 V to 5.5 V |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V (5V-tolerant I/O) |
| I/O Pins | 52 (approx., 64-VQFN) |
| ADC | 12-bit, up to 1 Msps, 20 channels |
| CAN-FD Controllers | 2 |
| SERCOM Modules | 6 (UART/SPI/I2C configurable) |
| USB | USB 2.0 Full-Speed Device |
| Timers/Counters | 16-/24-bit, multiple TC channels |
| PTC (Touch Channels) | Up to 256 channels |
| Memory Protection Unit (MPU) | Yes |
| Micro Trace Buffer | Yes |
| Hộp | 64-VQFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Functional Safety (FuSa) | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAMC21J18A-MUT64
| Chân 1 | PA00 — I/O line 0 of SERCOM (XIN as alternate) |
| Chân 2 | PA01 — I/O line 1 of SERCOM (XOUT as alternate) |
| Chân 3 | PA02 — GPIO / SERCOM / ADC input |
| Chân 4 | PA03 — GPIO / SERCOM / ADC input |
| Chân 5 | GND — Common ground |
| Chân 6 | VDDIO — Digital I/O supply (1.62V to 3.6V, 5V-tolerant) |
| Chân 7 | PA04 — GPIO / SERCOM / ADC input |
| Chân 8 | PA05 — GPIO / SERCOM / ADC input |
| Chân 9 | PA06 — GPIO / SERCOM / ADC input |
| Chân 10 | PA07 — GPIO / SERCOM / ADC input |
| Chân 11 | PA08 — GPIO / SERCOM / ADC input |
| Chân 12 | PA09 — GPIO / SERCOM / ADC input |
| Chân 13 | PA10 — GPIO / SERCOM / ADC input |
| Chân 14 | PA11 — GPIO / SERCOM / ADC input |
| Chân 15 | GND — Common ground |
| Chân 16 | VDDIN — Analog/battery supply (2.7V to 5.5V) |
| Chân 17 | PA12 — GPIO / SERCOM / PTC |
| Chân 18 | PA13 — GPIO / SERCOM / PTC |
| Chân 19 | PA14 — GPIO / SERCOM / PTC |
| Chân 20 | PA15 — GPIO / SERCOM / PTC |
| Chân 21 | PA16 — GPIO / SERCOM / PTC |
| Chân 22 | PA17 — GPIO / SERCOM / PTC |
| Chân 23 | PA18 — GPIO / SERCOM / PTC |
| Chân 24 | PA19 — GPIO / SERCOM / PTC |
| Chân 25 | PA20 — GPIO / SERCOM / PTC |
| Chân 26 | PA21 — GPIO / SERCOM / PTC |
| Chân 27 | PA22 — GPIO / SERCOM / PTC |
| Chân 28 | PA23 — GPIO / SERCOM / PTC |
| Chân 29 | PA24 — USB DM / SERCOM |
| Chân 30 | PA25 — USB DP / SERCOM |
| Chân 31 | GND — Common ground |
| Chân 32 | VDDIO — Digital I/O supply |
| Chân 33 | PA26 — GPIO / SERCOM |
| Chân 34 | PA27 — GPIO / SERCOM |
| Chân 35 | PA28 — GPIO / SERCOM |
| Chân 36 | PA29 — GPIO / SERCOM |
| Chân 37 | PA30 — GPIO / SERCOM |
| Chân 38 | PA31 — GPIO / SERCOM |
| Chân 39 | PB00 — GPIO / SERCOM / ADC |
| Chân 40 | PB01 — GPIO / SERCOM / ADC |
| Chân 41 | PB02 — GPIO / SERCOM / ADC |
| Chân 42 | PB03 — GPIO / SERCOM / ADC |
| Chân 43 | PB04 — GPIO / SERCOM / ADC |
| Chân 44 | PB05 — GPIO / SERCOM / ADC |
| Chân 45 | PB06 — GPIO / SERCOM / ADC |
| Chân 46 | PB07 — GPIO / SERCOM / ADC |
| Chân 47 | GND — Common ground |
| Chân 48 | VDDIO — Digital I/O supply |
| Chân 49 | PB08 — GPIO / SERCOM / ADC |
| Chân 50 | PB09 — GPIO / SERCOM / ADC |
| Chân 51 | PB10 — GPIO / SERCOM / ADC |
| Chân 52 | PB11 — GPIO / SERCOM / ADC |
| Chân 53 | PB12 — GPIO / SERCOM / PTC |
| Chân 54 | PB13 — GPIO / SERCOM / PTC |
| Chân 55 | PB14 — GPIO / SERCOM / PTC |
| Chân 56 | PB15 — GPIO / SERCOM / PTC |
| Chân 57 | PB16 — GPIO / SERCOM / PTC |
| Chân 58 | PB17 — GPIO / SERCOM / PTC |
| Chân 59 | PB18 — GPIO / SERCOM / PTC |
| Chân 60 | PB19 — GPIO / SERCOM / PTC |
| Chân 61 | PB20 — GPIO / SERCOM / PTC |
| Chân 62 | PB21 — GPIO / SERCOM / PTC |
| Chân 63 | GND — Common ground |
| Chân 64 | VDDIN — Analog/battery supply |
Ứng dụng tiêu biểu
ATSAMC21J18A-MUT64 phù hợp cho 6 Áp dụngs: Industrial CAN-FD Node Endpoint, Capacitive Touch HMI Panel, BLDC and Stepper Motor Control, Smart Energy Metering, Functional Safety Subsystem (IEC 60730 Class B), HVAC and Building Automation Controller.
Industrial CAN-FD Node Endpoint
The ATSAMC21J18A-MUT64's two CAN-FD controllers, 256 KB Flash, and 5V-tolerant I/O make it well suited for industrial node endpoints on CANopen or J1939 networks. The 12-bit 1 Msps ADC provides 20 channels for sensor acquisition, while the Cortex-M0+ at 48 MHz executes CAN-FD stacks with deterministic latency under 5 us. The 5V I/O removes level shifters when interfacing with legacy 24V industrial transceivers, and the 32 KB SRAM buffers diagnostic logs. Compared to switching to a discrete CAN-FD controller plus a smaller MCU, integrating CAN-FD on-die reduces PCB area and BOM cost.
Được đề xuất
Capacitive Touch HMI Panel
The ATSAMC21J18A-MUT64's integrated Peripheral Touch Controller (PTC) supports up to 256 channels for capacitive touch sliders and buttons, enabling compact HMI panels without external touch ICs. The 256 KB Flash stores touch-sensing firmware plus graphic state machines, while the 32 KB SRAM buffers raw touch data and gesture libraries. The 5V-tolerant I/O simplifies direct drive of LED backlights and segment displays. Compared to a discrete PTC IC plus MCU solution, the integrated approach reduces PCB footprint and BOM by approximately 30 percent.
Được đề xuất
BLDC and Stepper Motor Control
The ATSAMC21J18A-MUT64's 16-bit timers, PWM channels, and 12-bit 1 Msps ADC are well matched to sensorless BLDC and stepper motor control loops at moderate RPMs. The 48 MHz Cortex-M0+ delivers deterministic control loop execution in under 5 us, while the 5V I/O drives standard 5V gate drivers without level shifting. The 256 KB Flash accommodates field-oriented control (FOC) firmware plus diagnostic logging, and the dual CAN-FD enables real-time motor telemetry on industrial networks. Compared to discrete MCU + external ADC, integration cuts component count and EMI susceptibility.
Được đề xuất
Smart Energy Metering
The ATSAMC21J18A-MUT64's 16-bit Sigma-Delta ADC interface, dual CAN-FD, and 5V-tolerant I/O fit smart energy meters that need accurate metrology plus network connectivity. The Cortex-M0+ at 48 MHz runs metrology algorithms with deterministic timing, the 256 KB Flash stores calibration tables and AMI/CANopen stacks, and 32 KB SRAM buffers metrology samples between transmissions. The 5V I/O simplifies interfacing with shunt resistors and 24V analog front-end circuits. Compared to MCUs without on-chip Sigma-Delta interfaces, the integrated ADCs reduce BOM and improve noise immunity.
Được đề xuất
Functional Safety Subsystem (IEC 60730 Class B)
The ATSAMC21J18A-MUT64 carries the Functional Safety (FuSa) classification with documentation supporting IEC 60730 Class B appliances such as white goods, ovens, and washing machines. The Cortex-M0+ core, Memory Protection Unit (MPU), and built-in self-test libraries enable safe firmware execution, while the 256 KB Flash supports dual-bank OTA updates for safe firmware revisions. The 5V-tolerant I/O simplifies interface with 24V appliance control boards. Compared to MCUs lacking FuSa certification, this part reduces certification cost by an estimated 30 to 50 percent.
Được đề xuất
HVAC and Building Automation Controller
The ATSAMC21J18A-MUT64's dual CAN-FD, USB Full-Speed, six SERCOM, and 5V-tolerant I/O make it ideal for HVAC and building automation controllers. The 256 KB Flash accommodates BACnet or Modbus stacks plus scheduling firmware, while the 32 KB SRAM buffers telemetry for BACnet/IP gateways. The 12-bit 1 Msps ADC reads thermistor and pressure sensors with 1 mV resolution, and the 5V I/O simplifies interface with 24V triac outputs. Compared to discrete multi-IC implementations, integration reduces PCB area and BOM count by approximately 25 percent.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21J18A-MUT64 — 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 | ATSAMC21J18A-MNT | ATSAMC21J17A-MNT | ATSAMC20J18A-MUT | ATSAMC21G18A-AUT | ATSAMC20G18A-ANT |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-VQFN (9x9 mm) - same | 64-LQFP (10x10 mm) | 48-TQFP (7x7 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| Flash | 256 KB | 256 KB | 128 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 16 KB | 32 KB | 32 KB | 32 KB |
| CAN-FD Controllers | 2 | 2 | 2 | 0 (SAM C20 family) | 2 | 0 (SAM C20 family) |
| 5V-Tolerant I/O | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Bảo phân biệt quan trọng
- Dual CAN-FD controllers on-die (vsATSAMC20J18A-MUT)
- 256 KB Flash with 32 KB SRAM (vsATSAMC21J17A-MNT)
- 5V-tolerant I/O with 64-VQFN (9x9 mm) (vsATSAMD21J18A-MUT)
Ghi chú thiết kế
The 64-VQFN (9x9 mm) package has a center exposed pad that MUST be soldered to a continuous PCB ground plane for electrical grounding and thermal dissipation. Per Microchip SAM C21 datasheet recommendations, place at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch) under the EP to a second internal ground plane. Failing to solder the EP can raise junction temperature by 20 to 30 C above the datasheet limit at full 48 MHz operation, compromising long-term reliability.
Decouple each VDDIO/VDDIN pin with a 100 nF ceramic capacitor placed within 2 mm of the pin, and add a bulk 4.7 uF ceramic or tantalum capacitor near the device for transient load handling. The Microchip SAM C21 datasheet specifies that VDDIN must be at least 2.7 V before VDDIO ramps; failure to sequence supplies correctly can trigger latch-up on the 5V-tolerant I/O cells. Place a 10 uF bulk capacitor on VDDIO to support the 12-bit ADC's 1 Msps burst-mode sampling without rail collapse.
Route CAN-FD CANH/CANL differential pairs as a 100 ohm impedance-matched pair with length matching to within 5 mm. Per the Microchip SAM C21 datasheet and CiA 601-1 recommendation, place the CAN-FD transceiver within 10 mm of the MCU TX/RX pins to minimize stub length. Use a TVS diode such as PESD1CAN on the bus lines for ESD protection exceeding 8 kV contact discharge, and add a 120 ohm termination resistor at each end of the bus for reliable 1 Mbit/s data-phase operation.
Estimated: the SAM C21's Cortex-M0+ core draws approximately 7 mA/MHz active and 3 uA in standby with RTC running. When designing battery-backed industrial nodes, configure the SUPC (Supply Controller) to enter STANDBY mode with full SRAM retention (typical 6 uA at 3.3V) rather than OFF mode, which loses SRAM contents. A common pitfall is leaving the on-chip voltage regulator in HIGH-performance mode when STANDBY is desired, increasing quiescent current by approximately 60 uA unnecessarily. Always configure the VREG peripheral in Low-Power mode before entering deep sleep.
Place the 12 MHz external crystal within 5 mm of the XIN/XOUT pins, surrounded by a ground guard ring tied to the EP ground plane. Per the Microchip SAM C21 datasheet, the crystal load capacitors (typically 12 to 20 pF) must be sized according to the crystal's CL specification, NOT to the MCU's pin capacitance, which is only 5 pF. Use short, symmetrical traces and avoid routing noisy signals (CAN-FD, PWM) under or adjacent to the crystal traces to prevent PLL jitter above the 0.5 percent clock accuracy spec.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Functional Safety (FuSa) documentation available supporting IEC 60730 Class B; not AEC-Q100 qualified. Lead-free reflow profile per JEDEC J-STD-020.
