ATSAMD51J20A-MF - 120MHz Cortex-M4F MCU, 1MB Flash, 64-QFN | Microchip
MPN: ATSAMD51J20A-MF ✓ Hoạt độngATSAMD51J20A-MF Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for program storage, SRAM for data), and programmable peripherals around a common bus. The ATSAMD51J20A-MF belongs to the Cortex-M4F microcontroller family, which itself sits inside the broader 32-bit ARM Cortex-M hierarchy of low-power microcontrollers. Microcontrollers are a subset of microprocessors and, in turn, of integrated circuits and semiconductors, and they are the central building block of embedded systems across consumer, industrial, and IoT applications.
Key features include a Cortex-M4F core with FPU and DSP extensions, 1 MB Flash with Error-Correcting Code (ECC), 256 KB SRAM with ECC, and a high-speed USB 2.0 Full-Speed interface with integrated PHY. The device exposes SERCOM-configurable serial interfaces, I2S, CAN-FD, and a Quad-SPI controller for external memory expansion, enabling flexible connectivity to sensors, radios, and external flash. The 120 MHz core delivers 240 DMIPS / 387 CoreMark-class throughput.
Technically, the ATSAMD51J20A-MF uses a Harvard bus architecture with separate code and data paths, 4 KB instruction cache, and tightly-coupled memory for deterministic real-time response. The Event System and configurable peripherals (SERCOM x 8, TCC x 5) allow mapping of timers, SERCOM, and ADC triggers without CPU intervention, supporting low-latency control loops for motor, lighting, and power-conversion applications.
Typical applications include IoT edge nodes, industrial HMI, USB peripherals, motor control, audio processing with I2S, and automotive body/comfort subsystems that benefit from AEC-Q100 qualified variants. The wide peripheral mix suits multi-protocol sensor hubs and battery-powered connected devices.
When designing with this device, ensure the 64-QFN exposed pad is soldered to a sufficient ground copper pour to meet the 31.6 C/W theta_JA thermal envelope. Place a 100 nF decoupling capacitor on each VDD pin and a 4.7 uF bulk capacitor near the package, following the SAM D51 reference manual layout guidelines.
This page synthesizes distributor pricing, drop-in alternatives, and practical engineering notes not found on the manufacturer product page alone, including parametric comparisons and selection guidance for ATSAMD51, ATSAMD21, and competing Cortex-M4 MCU lines.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD51J20A-MF — 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 ATSAMD51J20A-MF (cùng hình factor và footprint) — khác nhau ở Package, USB, DAC, SRAM, ADC.
ATSAMD51J20A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J19A-MF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51G19A-MFT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51G18A-MF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J20A-MF Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M4F with FPU and DSP |
| Tần số xung maksimum | 120 MHz |
| Program Memory (Flash) | 1 MB (1M x 8) with ECC |
| SRAM | 256 KB with ECC |
| Operating Voltage (VDD) | 1.71 V to 3.6 V |
| I/O Voltage | 3.3 V typical |
| Hộp | 64-VQFN (9x9 mm) with exposed pad |
| USB | USB 2.0 Full-Speed with integrated PHY |
| CAN | CAN-FD |
| SERCOM | 8 configurable serial interfaces (UART/SPI/I2C) |
| ADC | 12-bit, up to 1 Msps |
| DAC | 12-bit |
| Nhiệt độ hoạt động | -40C to +125C (Extended) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant |
| Qualification | AEC-Q100 (Automotive Grade) |
Cấu hình chân ATSAMD51J20A-MF
| Chân 1 | PA00 — GPIO / XIN32 |
| Chân 2 | PA01 — GPIO / XOUT32 |
| Chân 3 | PA02 — GPIO / AIN0 |
| Chân 4 | PA03 — GPIO / AIN1 / VREFA |
| Chân 5 | GND — Ground |
| Chân 6 | VDDIO — I/O supply voltage |
| Chân 7 | PA04 — GPIO / AIN2 |
| Chân 8 | PA05 — GPIO / AIN3 |
| Chân 9 | PA06 — GPIO / AIN4 |
| Chân 10 | PA07 — GPIO / AIN5 |
| Chân 11 | PA08 — GPIO / AIN6 |
| Chân 12 | PA09 — GPIO / AIN7 |
| Chân 13 | PA10 — GPIO / AIN8 |
| Chân 14 | PA11 — GPIO / AIN9 |
| Chân 15 | VDDIO — I/O supply voltage |
| Chân 16 | GND — Ground |
| Chân 17 | PB10 — GPIO |
| Chân 18 | PB11 — GPIO |
| Chân 19 | PB12 — GPIO |
| Chân 20 | PB13 — GPIO |
| Chân 21 | PB14 — GPIO |
| Chân 22 | PB15 — GPIO |
| Chân 23 | PA12 — GPIO |
| Chân 24 | PA13 — GPIO |
| Chân 25 | PA14 — GPIO |
| Chân 26 | PA15 — GPIO |
| Chân 27 | PA16 — GPIO |
| Chân 28 | PA17 — GPIO |
| Chân 29 | PA18 — GPIO |
| Chân 30 | PA19 — GPIO |
| Chân 31 | PA20 — GPIO |
| Chân 32 | PA21 — GPIO |
| Chân 33 | PB16 — GPIO |
| Chân 34 | PB17 — GPIO |
| Chân 35 | PB18 — GPIO / CAN0 RX |
| Chân 36 | PB19 — GPIO / CAN0 TX |
| Chân 37 | PB20 — GPIO |
| Chân 38 | PB21 — GPIO |
| Chân 39 | PA22 — GPIO / USB DP |
| Chân 40 | PA23 — GPIO / USB DM |
| Chân 41 | PA24 — GPIO |
| Chân 42 | PA25 — GPIO |
| Chân 43 | GND — Ground |
| Chân 44 | VDDIO — I/O supply voltage |
| Chân 45 | VDD — Core supply voltage |
| Chân 46 | VBAT — Battery supply for RTC |
| Chân 47 | RESET — Reset input (active low) |
| Chân 48 | SWDIO — Serial Wire Debug I/O |
| Chân 49 | SWCLK — Serial Wire Debug clock |
| Chân 50 | PA27 — GPIO |
| Chân 51 | PA28 — GPIO |
| Chân 52 | PA29 — GPIO / BOOT |
| Chân 53 | PA30 — GPIO |
| Chân 54 | PA31 — GPIO |
| Chân 55 | PB22 — GPIO |
| Chân 56 | PB23 — GPIO |
| Chân 57 | PB24 — GPIO |
| Chân 58 | PB25 — GPIO |
| Chân 59 | PB26 — GPIO |
| Chân 60 | PB27 — GPIO |
| Chân 61 | PB28 — GPIO |
| Chân 62 | PB29 — GPIO |
| Chân 63 | PB30 — GPIO |
| Chân 64 | PB31 — GPIO |
Ứng dụng tiêu biểu
ATSAMD51J20A-MF phù hợp cho 6 Áp dụngs: IoT Edge Nodes and Wireless Sensor Hubs, Industrial HMI and Touch Interfaces, USB Peripherals and HID Devices, Motor Control and BLDC/PMSM Drives, Audio Processing with I2S and PDM Interfaces, Automotive Body and Comfort Electronics.
IoT Edge Nodes and Wireless Sensor Hubs
The ATSAMD51J20A-MF's 120 MHz Cortex-M4F core with FPU and DSP extensions delivers 387 CoreMark-class throughput for IoT edge aggregation, while 1 MB Flash supports Over-the-Air (OTA) update staging and 256 KB SRAM handles buffering of multiple sensor streams. The 8 SERCOM-configurable interfaces allow simultaneous UART, SPI, and I2C connectivity to radios (LoRa, BLE, Wi-Fi), sensors, and EEPROM without CPU overhead. With USB 2.0 Full-Speed and CAN-FD integrated, the device aggregates data from industrial sensor hubs while staying within a compact 9x9 mm footprint.
Được đề xuất
Industrial HMI and Touch Interfaces
For industrial HMI panels, the ATSAMD51J20A-MF drives TFT LCDs through its external bus interface and supports capacitive touch via the PTC peripheral. The 12-bit ADC and 12-bit DAC enable analog sensor reading and signal conditioning, while the Event System triggers ADC conversions without CPU load. With 1 MB Flash storing graphics libraries and 256 KB SRAM buffering display frames, designers can build responsive touch interfaces. The -40C to +125C extended temperature range supports factory-floor deployment.
Được đề xuất
USB Peripherals and HID Devices
The integrated USB 2.0 Full-Speed PHY on the ATSAMD51J20A-MF eliminates external components for HID keyboards, mice, audio devices, and CDC-class peripherals. The Cortex-M4F DSP extensions accelerate audio processing for USB headsets, while 1 MB Flash hosts USB stacks and application code. The 120 MHz core handles HID report generation, audio sample streaming, and CDC serial emulation simultaneously without dropping USB frames, and the AEC-Q100 grade supports automotive USB charger and diagnostic interfaces.
Được đề xuất
Motor Control and BLDC/PMSM Drives
The ATSAMD51J20A-MF's five 16-bit Timer/Counter for Control (TCC) channels generate complementary PWM with dead-time insertion, ideal for 3-phase BLDC and PMSM motor drives. The Cortex-M4F core runs field-oriented control (FOC) loops with single-cycle MAC instructions, while 12-bit ADC samples phase currents at 1 Msps with hardware triggering from TCC. CAN-FD enables real-time communication with vehicle or industrial bus networks, and AEC-Q100 qualification supports automotive electric power steering and pump applications.
Được đề xuất
Audio Processing with I2S and PDM Interfaces
The ATSAMD51J20A-MF's I2S interface streams digital audio to external DACs and codecs, while PDM inputs support digital MEMS microphones for voice capture. The Cortex-M4F DSP extensions accelerate MP3 decode, noise suppression, and acoustic echo cancellation algorithms, with 1 MB Flash storing audio firmware and 256 KB SRAM buffering audio packets. The SERCOM-configurable peripherals multiplex multiple audio streams, and the FPU handles floating-point DSP kernels efficiently at 120 MHz.
Được đề xuất
Automotive Body and Comfort Electronics
The AEC-Q100 qualification of the ATSAMD51J20A-MF supports deployment in body controllers, lighting modules, climate control panels, and seat control units. CAN-FD enables high-bandwidth communication with vehicle networks, while the LIN-compatible SERCOM interfaces connect to local sensor clusters. The 120 MHz Cortex-M4F runs CAN stack, lighting algorithms, and HVAC control loops simultaneously, with 1 MB Flash accommodating AUTOSAR MCAL and application layers. The 64-VQFN package fits behind dashboard assemblies where space is constrained.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD51J20A-MF — 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 | ATSAMD51J20A-MUT | ATSAMD51J19A-MF | ATSAMD51J18A-MU | ATSAMD51G19A-MFT | ATSAMD51G18A-MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9) | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same |
| Core | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz |
| Flash | 1 MB | 1 MB | 512 KB | 256 KB | 512 KB | 256 KB |
| SRAM | 256 KB | 256 KB | 192 KB | 128 KB | 192 KB | 128 KB |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| CAN-FD | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | Extended (-40C to +125C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Extended (-40C to +125C) |
| Unit Price (qty 1) | 9.20 USD | 9.10 USD | 8.40 USD | 7.50 USD | 8.20 USD | 7.30 USD |
Bảo phân biệt quan trọng
- Largest Flash and SRAM in the SAM D51J family with same 64-VQFN package (vsATSAMD51J19A-MF)
- Higher memory headroom with same core performance vs SAM D51G (vsATSAMD51G18A-MF)
- AEC-Q100 qualified with extended temperature range vs consumer-grade alternatives (vsATSAMD51J20A-MU)
Ghi chú thiết kế
The 64-VQFN (9x9 mm) package has a theta_JA of approximately 31.6 C/W per the SAM D51 datasheet. At maximum CPU activity (120 MHz, peripherals active), the device dissipates around 200-300 mW depending on I/O loading. Soldering the exposed pad to a ground copper pour of at least 1 square inch is mandatory to meet thermal and electrical performance; the EP also serves as the primary ground return path for high-speed signals.
Place 100 nF X7R 0402/0603 decoupling capacitors on each VDDIO and VDD pin, located within 2 mm of the pin with short, wide traces to minimize loop inductance. Add a 4.7 uF bulk capacitor near the package for core regulator stability. Keep the crystal traces (XIN/XOUT) short, symmetric, and surrounded by ground; avoid routing signal traces beneath the crystal or its traces. USB DP/DM traces should be 90 ohm differential with no stubs.
Do not exceed the absolute maximum VDD of 3.6 V; operation above this damages the on-chip regulators. The ATSAMD51J20A-MF requires a 12 MHz crystal or external clock on XIN/XOUT for USB operation; an internal 12 MHz oscillator cannot drive USB reliably. The boot pin (PA29) state must be set before RESET release to select the correct boot mode; floating this pin can cause boot failures.
USB DP/DM differential pair must be routed with 90 ohm impedance and length-matched within 150 mil. Avoid vias on USB DP/DM where possible. If the board uses SERCOM in SPI mode at high speeds (>20 MHz), add source-series termination (22-33 ohm) at the driver output to dampen reflections. The Quad-SPI signals should be length-matched within 50 mil for flash operation above 50 MHz.
Thông tin tuân thủ
AEC-Q100 Grade 2 automotive qualified per Microchip product line card. RoHS and REACH compliant per manufacturer product page.
