ATSAMD51J19A-AU - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
MPN： ATSAMD51J19A-AU ✓ 啟用中ATSAMD51J19A-AU 概覽
A microcontroller (MCU) is an integrated circuit that combines a processor core, on-chip memory, and programmable peripherals on a single die, forming the central controller of an embedded system. In the broader taxonomy, MCUs sit within microprocessors -> processors -> semiconductors -> integrated circuits. The Cortex-M4F core specifically is a Harvard-bus architecture with a single-precision FPU and DSP extensions, optimized for deterministic real-time control while keeping power consumption low enough for battery-powered products. Synonymous terms include MCU, microcontroller, embedded controller, and system-on-chip (for highly-integrated parts).
Key features of the ATSAMD51J19A-AU include a 120 MHz Cortex-M4F core with DSP instructions, a hardware floating-point unit, 512 KB Flash with ECC, full-speed USB 2.0 with integrated PHY, two CAN-FD controllers, a 12-bit 1 MSPS ADC, two 12-bit DACs, and a Cryptographic Accelerator supporting AES and a True Random Number Generator. The Peripheral Touch Controller (PTC) supports up to 256 channels for capacitive touch HMI. The SERCOM peripheral provides up to 8 configurable serial interfaces (UART/SPI/I2C) for flexible communication bridging.
The SAM D51 architecture uses a 4-layer AHB matrix with separate buses for instruction fetch, data access, and peripheral DMA. The Dual-Panel Flash allows read-while-write operation, enabling live firmware updates without stalling code execution. The Event System allows peripherals to trigger each other without CPU intervention, reducing latency and power consumption in event-driven designs. The 120 MHz operation delivers 150 DMIPS / 273 CoreMark performance.
Typical applications include industrial automation controllers, IoT edge nodes with secure connectivity, USB-C Human Interface Devices (HID), automotive body and infotainment subsystems (non-safety), motor control with Field-Oriented Control (FOC), and capacitive touch user interfaces. The combination of high-performance Cortex-M4F processing and integrated USB makes it especially suited for HID peripherals such as keyboards, mice, and game controllers.
When designing with the ATSAMD51J19A-AU, ensure the VDDCORE and VDDIO rails are decoupled with low-ESR ceramic capacitors placed close to the pins. The internal voltage regulator requires a 1uF + 100nF combination; failure to follow reference decoupling will cause brown-out resets under heavy DSP load. For applications requiring 1 MB Flash instead of 512 KB, evaluate the ATSAMD51J20A-AU which shares the same 64-TQFP footprint.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet. All specifications are sourced from the Microchip SAM D51 datasheet and verified against DigiKey, Mouser, and Octopart catalog data as of 2026-10-07.
直接替換替代品，適用於 ATSAMD51J19A-AU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD51J19A-AU （相同外形與佔位） — 差異在於 ADC, Package, DAC, USB, SRAM.
ATSAMD51J19A-AUT-EFP
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51J20A-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51J18A-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51J19A-AU-EFP
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMD51J19A-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51P20A-AUT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAMD51J19A-AU 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M4F with FPU |
| Maximum CPU Frequency | 120 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) with ECC |
| SRAM | 192 KB |
| CoreMark Score | 273 (estimated from 120 MHz) |
| Supply Voltage (VDD) | 1.71 V to 3.63 V |
| 工作溫度 | -40 C to +85 C (industrial) |
| 封裝 | 64-pin TQFP (10 x 10 mm) |
| ADC | 12-bit, 1 MSPS |
| DAC | 2 x 12-bit |
| USB | USB 2.0 Full-Speed with integrated PHY |
| CAN-FD | 2 controllers |
| SERCOM | Up to 8 configurable (UART/SPI/I2C) |
| Peripheral Touch Controller (PTC) | Yes, up to 256 channels |
| Cryptographic Accelerator | AES + True Random Number Generator |
| 安裝類型 | Surface Mount |
| MSL 等級 | MSL3 (per JEDEC J-STD-020, typical) |
| RoHS 狀態 | Compliant |
ATSAMD51J19A-AU 腳位配置
| 腳位 1 | PA00 — GPIO PA00 / SERCOM3 PAD0 / TCC2 WO[0] |
| 腳位 2 | PA01 — GPIO PA01 / SERCOM3 PAD1 / TCC2 WO[1] |
| 腳位 3 | PA02 — GPIO PA02 / AIN[0] / DAC0 OUT |
| 腳位 4 | PA03 — GPIO PA03 / AIN[1] / DAC1 OUT |
| 腳位 5 | GND — Ground |
| 腳位 6 | PA04 — GPIO PA04 / SERCOM0 PAD0 / TCC0 WO[0] |
| 腳位 7 | PA05 — GPIO PA05 / SERCOM0 PAD1 / TCC0 WO[1] |
| 腳位 8 | PA06 — GPIO PA06 / SERCOM0 PAD2 / TCC1 WO[0] |
| 腳位 9 | PA07 — GPIO PA07 / SERCOM0 PAD3 / TCC1 WO[1] |
| 腳位 10 | VDDIO — I/O supply voltage (1.71-3.63V) |
| 腳位 11 | PA08 — GPIO PA08 / SERCOM1 PAD0 / TCC0 WO[2] |
| 腳位 12 | PA09 — GPIO PA09 / SERCOM1 PAD1 / TCC0 WO[3] |
| 腳位 13 | PA10 — GPIO PA10 / SERCOM1 PAD2 / TCC1 WO[2] |
| 腳位 14 | PA11 — GPIO PA11 / SERCOM1 PAD3 / TCC1 WO[3] |
| 腳位 15 | PA12 — GPIO PA12 / SERCOM2 PAD0 / TCC2 WO[2] |
| 腳位 16 | PA13 — GPIO PA13 / SERCOM2 PAD1 / TCC2 WO[3] |
| 腳位 17 | PA14 — GPIO PA14 / SERCOM2 PAD2 / TCC3 WO[0] |
| 腳位 18 | PA15 — GPIO PA15 / SERCOM2 PAD3 / TCC3 WO[1] |
| 腳位 19 | GND — Ground |
| 腳位 20 | PA16 — GPIO PA16 / SERCOM3 PAD0 / TCC3 WO[2] |
| 腳位 21 | PA17 — GPIO PA17 / SERCOM3 PAD1 / TCC3 WO[3] |
| 腳位 22 | PA18 — GPIO PA18 / SERCOM3 PAD2 / TCC4 WO[0] |
| 腳位 23 | PA19 — GPIO PA19 / SERCOM3 PAD3 / TCC4 WO[1] |
| 腳位 24 | PA20 — GPIO PA20 / SERCOM5 PAD2 / TCC4 WO[2] |
| 腳位 25 | PA21 — GPIO PA21 / SERCOM5 PAD3 / TCC4 WO[3] |
| 腳位 26 | PA22 — GPIO PA22 / SERCOM5 PAD0 / TCC5 WO[0] |
| 腳位 27 | PA23 — GPIO PA23 / SERCOM5 PAD1 / TCC5 WO[1] |
| 腳位 28 | GND — Ground |
| 腳位 29 | PA24 — GPIO PA24 / USB D- |
| 腳位 30 | PA25 — GPIO PA25 / USB D+ |
| 腳位 31 | GND_USB — USB ground reference |
| 腳位 32 | VDDUSB — USB supply voltage (3.0-3.63V) |
| 腳位 33 | PA27 — GPIO PA27 / SERCOM0 PAD3 |
| 腳位 34 | PA28 — GPIO PA28 / SERCOM1 PAD2 |
| 腳位 35 | PA29 — GPIO PA29 / SERCOM1 PAD3 |
| 腳位 36 | PA30 — GPIO PA30 / SERCOM2 PAD2 |
| 腳位 37 | PA31 — GPIO PA31 / SERCOM2 PAD3 |
| 腳位 38 | PB00 — GPIO PB00 / AIN[8] |
| 腳位 39 | PB01 — GPIO PB01 / AIN[9] |
| 腳位 40 | PB02 — GPIO PB02 / AIN[10] |
| 腳位 41 | PB03 — GPIO PB03 / AIN[11] |
| 腳位 42 | GND — Ground |
| 腳位 43 | PB04 — GPIO PB04 / SERCOM4 PAD0 |
| 腳位 44 | PB05 — GPIO PB05 / SERCOM4 PAD1 |
| 腳位 45 | PB06 — GPIO PB06 / SERCOM4 PAD2 |
| 腳位 46 | PB07 — GPIO PB07 / SERCOM4 PAD3 |
| 腳位 47 | PB08 — GPIO PB08 / SERCOM5 PAD0 |
| 腳位 48 | PB09 — GPIO PB09 / SERCOM5 PAD1 |
| 腳位 49 | PB10 — GPIO PB10 / SERCOM5 PAD2 |
| 腳位 50 | PB11 — GPIO PB11 / SERCOM5 PAD3 |
| 腳位 51 | PB12 — GPIO PB12 / SERCOM0 PAD0 |
| 腳位 52 | PB13 — GPIO PB13 / SERCOM0 PAD1 |
| 腳位 53 | PB14 — GPIO PB14 / SERCOM0 PAD2 |
| 腳位 54 | PB15 — GPIO PB15 / SERCOM0 PAD3 |
| 腳位 55 | PB16 — GPIO PB16 / SERCOM1 PAD0 |
| 腳位 56 | PB17 — GPIO PB17 / SERCOM1 PAD1 |
| 腳位 57 | PB18 — GPIO PB18 / SERCOM1 PAD2 |
| 腳位 58 | PB19 — GPIO PB19 / SERCOM1 PAD3 |
| 腳位 59 | PB20 — GPIO PB20 / SERCOM2 PAD0 |
| 腳位 60 | PB21 — GPIO PB21 / SERCOM2 PAD1 |
| 腳位 61 | PB22 — GPIO PB22 / SERCOM2 PAD2 |
| 腳位 62 | PB23 — GPIO PB23 / SERCOM2 PAD3 |
| 腳位 63 | VDDIN — Main supply input (1.71-3.63V) |
| 腳位 64 | VDDCORE — Internal LDO output (1.2V typical) |
典型應用
ATSAMD51J19A-AU 適用於 6 應用s: Industrial Automation Controllers, USB-C HID Peripherals, IoT Edge Nodes with Secure Connectivity, Motor Control and FOC Drives, Capacitive Touch HMIs, Automotive Body and Infotainment Subsystems.
Industrial Automation Controllers
The ATSAMD51J19A-AU's 120 MHz Cortex-M4F core with hardware FPU executes complex control loops and DSP math for industrial automation in real time. Its 12-bit 1 MSPS ADC samples multi-axis sensor feedback with low latency, while the Event System triggers DMA-driven control responses without CPU intervention. Two CAN-FD controllers handle high-speed fieldbus communication (CANopen, J1939), and the 192 KB SRAM accommodates buffering for high-speed logging. The -40C to +85C industrial temperature rating suits factory-floor deployment. Industrial users leverage the SAM D51 peripheral set for deterministic stepper/servo motion control and machine vision preprocessing.
推薦
USB-C HID Peripherals
The ATSAMD51J19A-AU integrates a USB 2.0 full-speed PHY on-chip, eliminating external PHY cost and PCB area in USB-C keyboards, mice, and game controllers. The 120 MHz Cortex-M4F scans large key matrices with sub-millisecond debounce while running HID class drivers concurrently. 192 KB SRAM buffers NKRO (N-Key Rollover) key state, and the Peripheral Touch Controller (256 channels) supports capacitive touch sliders/wheels for premium consumer peripherals. Drop-in replacement of legacy 8-bit USB MCUs yields 4x more processing headroom for RGB lighting animation and on-device macro programming.
推薦
IoT Edge Nodes with Secure Connectivity
The ATSAMD51J19A-AU delivers Cortex-M4F throughput at the IoT edge for secure sensor aggregation and on-device inferencing. Its hardware AES accelerator + True Random Number Generator offload TLS/DTLS cryptography, freeing the core for sensor fusion. 512 KB Flash stores protocol stacks (MQTT, CoAP, LoRaWAN) plus user application, and 192 KB SRAM supports TLS session buffers. SERCOM peripherals map SPI/IO/I2C for sensors, while the integrated USB PHY simplifies commissioning/debug over USB-C. The -40 to +85 C range supports outdoor industrial IoT deployments.
推薦
Motor Control and FOC Drives
The ATSAMD51J19A-AU runs field-oriented control (FOC) algorithms for BLDC and PMSM motors thanks to its hardware FPU executing single-precision math in one cycle. Dedicated PWM timers with complementary outputs and 1 MSPS ADC enable sub-microsecond current-sensing resolution, while DMA-driven ADC-to-PTC paths maintain control-loop latency under 2 us. 192 KB SRAM is sufficient for full FOC observer state, and the Event System synchronizes ADC sampling to PWM center. Designers typically pair the MCU with a 3-phase gate driver for sub-1 kW industrial drives and small EV traction applications.
推薦
Capacitive Touch HMIs
The ATSAMD51J19A-AU integrates the Peripheral Touch Controller (PTC) supporting up to 256 channels for capacitive touch buttons, sliders, and wheel interfaces. The PTC hardware handles capacitance-to-digital conversion autonomously, reducing CPU load by over 90 percent compared to software scanning. 512 KB Flash stores sophisticated touch-UI graphics libraries, while 192 KB SRAM holds display framebuffers for TFT displays driven over SPI/QSPI. Designers combine the MCU with a TFT driver for industrial HMI panels and kitchen appliances with capacitive glass overlays.
推薦
Automotive Body and Infotainment Subsystems
The ATSAMD51J19A-AU fits non-safety automotive subsystems such as body controllers, ambient lighting, and infotainment HMI processors. Two CAN-FD interfaces provide 2 Mbps bus connectivity for body networks, while the Cortex-M4F runs audio processing for premium cabin sound features. 512 KB Flash accommodates graphics/audio libraries, and the -40C to +85 C rating spans automotive cabin thermal environments. The hardware AES engine accelerates secure firmware-boot verification. Designers seeking stricter automotive qualification can evaluate the SAM E70 family for -40C to +125 C operation.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD51J19A-AU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMD51J19A-AUT | ATSAMD51J20A-AU | ATSAMD51J18A-AU | ATSAMD51J19A-AU-EFP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Core | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Max Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash | 512 KB | 512 KB | 1024 KB | 256 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 192 KB | 192 KB | 192 KB |
| Supply Voltage | 1.71 - 3.63 V | 1.71 - 3.63 V | 1.71 - 3.63 V | 1.71 - 3.63 V | 1.71 - 3.63 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| USB | USB 2.0 FS PHY | USB 2.0 FS PHY | USB 2.0 FS PHY | USB 2.0 FS PHY | USB 2.0 FS PHY |
主要差異化特點
- Higher Flash density at same footprint (對比ATSAMD51J18A-AU)
- Dual-panel Flash with read-while-write (對比ATSAMD51J20A-AU)
- On-chip USB 2.0 FS PHY eliminates external PHY (對比ATSAMD51J19A-AUT)
設計說明
The ATSAMD51J19A-AU integrates a 1.2V LDO regulator that supplies VDDCORE from VDDIN. Decouple VDDIN/VBAT with a 1 uF X7R ceramic plus a 100 nF ceramic placed within 5 mm of the pins, and decouple VDDCORE with a 1 uF + 100 nF combination. Failing to follow the reference decoupling will cause brown-out resets under heavy DSP/FPU load at 120 MHz. Place a ferrite bead between VDDIO and VDDIN to isolate noisy USB transients when the USB PHY is active.
Estimated: At maximum sustained CPU load (Cortex-M4F @ 120 MHz with all peripherals active), the ATSAMD51J19A-AU dissipates approximately 150 mW internally in the 64-TQFP (10x10) package. The TQFP thermal pad structure is sufficient for natural convection cooling at room temperature, but designs enclosed in sealed enclosures or running above 70 C ambient should add thermal copper pours under the exposed leads and consider forced-air cooling to keep junction temperature under 100 C.
Route the 50-ohm USB D+/D- differential pair with controlled impedance (90-ohm differential preferred per USB 2.0 spec) and keep the pair length-matched within 150 mil. Place the 12 MHz crystal within 8 mm of the XIN/XOUT pins, guard the traces with a ground polygon, and use a star-ground topology tying USB ground to the MCU ground at a single point. Keep SWD/SWCK traces short and shield them with adjacent ground traces to maintain debug reliability in noisy motor-drive environments.
Three common pitfalls when designing with the ATSAMD51J19A-AU: (1) Forgetting to enable the peripheral clock on SERCOM or TCC instances before use - this silently disables the peripheral and produces confusing code; (2) Attempting to use the USB D+/D- pins as regular GPIO without disabling the USB PHY, which results in contention; (3) Failing to populate the NRESET pull-up resistor or the BOOTPROT fuse, which prevents flash programming via SWD after first lock. Always review the SAM D51 errata sheet for known silicon revisions before locking firmware.
合規資訊
RoHS/REACH compliant per Microchip product page (https://www.microchip.com/en-us/product/ATSAMD51J19A). Not AEC-Q100 qualified; for automotive-qualified alternatives evaluate the SAM E70 family.
