ATSAME51J20A-AF - 120MHz Cortex-M4F MCU, 1MB Flash | Microchip
N.º da peça: ATSAME51J20A-AF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.96 | $8,96 |
| 10 | $8.1 | $81,00 |
| 100 | $7.21 | $721,00 |
| 500 | $6.45 | $3.225,00 |
| 1.000 | $5.78 | $5.780,00 |
| 3.000 | $5.1 | $15.300,00 |
ATSAME51J20A-AF Visão geral
What is a SAM E51 microcontroller? An ARM Cortex-M4F MCU is a 32-bit microcontroller built around the ARM Cortex-M4 processor core with single-precision Floating Point Unit and DSP extensions. SAM E51 belongs to Microchip's SAM family of Cortex-M4F microcontrollers, which sit within the broader microcontroller and embedded-processor category of semiconductors. These MCUs target industrial automation, motor control, IoT gateways, and automotive subsystems where deterministic real-time performance, connectivity, and math-intensive signal processing are required.
Key differentiating features of the ATSAME51J20A-AF include 1 MB dual-panel Flash with ECC, 256 KB SRAM, four SERCOM interfaces configurable as UART/SPI/I2C, two I2S for digital audio, two CAN-FD, a parallel camera interface, an Ethernet MAC with 1588 PTP support, and a 120 MHz Cortex-M4F core delivering 150 CoreMark / 1.25 DMIPS per MHz. The device operates from 1.71 V to 3.63 V with an internal 48 MHz DFLL and a 12 MHz crystal-less PLL for USB.
The ATSAME51J20A-AF uses a 2-layer AHB bus matrix and a dedicated 4-channel DMA controller (DMAC) plus an Event System for zero-CPU-overhead peripheral signaling. The integrated FPU accelerates float math for control loops and DSP, while the 1 MSPS ADC enables high-bandwidth analog sampling for sensor fusion.
Typical applications include industrial PLCs, building automation controllers, automotive body and HVAC modules, USB peripherals, Ethernet-connected IoT gateways, and graphical HMI panels. The wide operating temperature range of -40 C to +125 C makes the part suitable for both industrial and AEC-Q100 automotive use.
When designing with the ATSAME51J20A-AF, decouple VDDCORE and VDDIO with a minimum of 100 nF X7R per pin pair, route the 32.768 kHz crystal traces symmetrically, and reference Microchip application notes for the SERCOM, DMAC, and Event System to fully offload peripheral work from the CPU.
This page synthesizes distributor pricing for the ATSAME51J20A-AF, cross-references drop-in alternatives within the SAM E51/SAM D51 family, and consolidates practical design notes beyond the manufacturer datasheet summary.
Alternativas drop-in para ATSAME51J20A-AF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAME51J20A-AF (mesmo formato e footprint) — diferindo em USB, ADC, SRAM, CAN, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAME51J20A-AU
✅ Drop-In✓ Em estoque
$6.45 / unidade
Ver ficha técnica →ATSAME51J19A-AFT
✅ Drop-In✓ Em estoque
$5.62 / unidade
Ver ficha técnica →ATSAMD51J20A-AF
✅ Drop-In✓ Em estoque
$5.85 / unidade
Ver ficha técnica →ATSAME51J20A-AZT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAME51G20A-AF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMD51J20A-AUT-EFP
✅ Drop-In✓ Em estoque
$7.8 / unidade
Ver ficha técnica →ATSAME51J20A-AF Classificações máximas e características elétricas
| Core Architecture | ARM Cortex-M4F with FPU and DSP extensions |
| Maximum CPU Clock | 120 MHz |
| Program Memory | 1 MB (1M x 8) dual-panel Flash with ECC |
| SRAM | 256 KB |
| Tensão de alimentação | 1.71 V to 3.63 V |
| Temperatura de operação | -40 C to +125 C (extended) |
| Encapsulamento | 64-pin TQFP, 10 mm x 10 mm, 0.5 mm pitch |
| ADC | 1 MSPS, 12-bit, up to 16 channels |
| DAC | 12-bit, 2 channels |
| Communication Interfaces | USB 2.0 Full-Speed, 2x CAN-FD, Ethernet MAC 10/100 with 1588, 4x SERCOM (UART/SPI/I2C), 2x I2S, 1x HS SD Card / eMMC |
| Timer/Counter | 5x 16-bit TC, 3x 24-bit TCC for PWM |
| DMA | DMAC with 32 channels + Event System |
| Memory Protection | TrustZone-M (optional, SAM E51 variant dependent) |
| Automotive Qualification | AEC-Q100 qualified |
| Tipo de montagem | Surface Mount (TQFP) |
| Nível MSL | 3 (168 hours) |
Configuração de pinos do ATSAME51J20A-AF
| Pino 1 | PA03 — GPIO/ADC input (AIN[1]) |
| Pino 2 | PA04 — GPIO/ADC input (AIN[2]) |
| Pino 3 | PA05 — GPIO/ADC input (AIN[3]) |
| Pino 4 | PA06 — GPIO/ADC input (AIN[4]) |
| Pino 5 | PA07 — GPIO/ADC input (AIN[5]) |
| Pino 6 | VDDIO — I/O supply voltage, 1.71V-3.63V |
| Pino 7 | GND — Ground |
| Pino 8 | PA08 — GPIO/NMI, SERCOM alt |
| Pino 9 | PA09 — GPIO/SERCOM alt |
| Pino 10 | PA10 — GPIO/SERCOM alt |
| Pino 11 | PA11 — GPIO/SERCOM alt |
| Pino 12 | VDDCORE — Core voltage regulator output, decouple 1 uF + 100 nF |
| Pino 13 | GND — Ground |
| Pino 14 | PA12 — GPIO/SERCOM alt |
| Pino 15 | PA13 — GPIO/SERCOM alt |
| Pino 16 | PA14 — GPIO/SERCOM alt |
| Pino 17 | PA15 — GPIO/SERCOM alt |
| Pino 18 | PA16 — GPIO/SERCOM alt |
| Pino 19 | PA17 — GPIO/SERCOM alt |
| Pino 20 | PA18 — GPIO/SERCOM alt |
| Pino 21 | PA19 — GPIO/SERCOM alt |
| Pino 22 | VDDIO — I/O supply voltage |
| Pino 23 | GND — Ground |
| Pino 24 | PB08 — GPIO/SERCOM alt |
| Pino 25 | PB09 — GPIO/SERCOM alt |
| Pino 26 | PB10 — GPIO/SERCOM alt |
| Pino 27 | PB11 — GPIO/SERCOM alt |
| Pino 28 | PB12 — GPIO/SERCOM alt / TCC0 WO[6] |
| Pino 29 | PB13 — GPIO/SERCOM alt / TCC0 WO[7] |
| Pino 30 | PB14 — GPIO/SERCOM alt |
| Pino 31 | PB15 — GPIO/SERCOM alt |
| Pino 32 | PA20 — GPIO/I2S alt |
| Pino 33 | PA21 — GPIO/I2S alt |
| Pino 34 | PA22 — GPIO/I2S alt |
| Pino 35 | PA23 — GPIO/I2S alt |
| Pino 36 | PA24 — GPIO/USB D- |
| Pino 37 | PA25 — GPIO/USB D+ |
| Pino 38 | GND — Ground |
| Pino 39 | VDDIO — I/O supply voltage |
| Pino 40 | PB16 — GPIO/SERCOM alt |
| Pino 41 | PB17 — GPIO/SERCOM alt |
| Pino 42 | PB18 — GPIO/SERCOM alt |
| Pino 43 | PB19 — GPIO/SERCOM alt |
| Pino 44 | PB20 — GPIO/SERCOM alt |
| Pino 45 | PB21 — GPIO/SERCOM alt |
| Pino 46 | PA27 — GPIO/CAN0 TX |
| Pino 47 | GND — Ground |
| Pino 48 | VDDIO — I/O supply voltage |
| Pino 49 | PB22 — GPIO/CAN1 TX |
| Pino 50 | PB23 — GPIO/CAN1 RX |
| Pino 51 | PB24 — GPIO/Ethernet GMDIO |
| Pino 52 | PB25 — GPIO/Ethernet GMDC |
| Pino 53 | PA00 — GPIO/XIN32, ADC reference |
| Pino 54 | PA01 — GPIO/XOUT32 |
| Pino 55 | PA02 — GPIO/ADC input (AIN[0]) |
| Pino 56 | RESET — Reset input, active low |
| Pino 57 | VDDIO — I/O supply voltage |
| Pino 58 | GND — Ground |
| Pino 59 | PA30 — GPIO/SWDIO |
| Pino 60 | PA31 — GPIO/SWCLK |
| Pino 61 | PB30 — GPIO/SWO trace |
| Pino 62 | PB31 — GPIO |
| Pino 63 | VDDIO — I/O supply voltage |
| Pino 64 | GND — Ground |
Aplicações típicas
ATSAME51J20A-AF é adequado para 7 aplicaçãos: Industrial PLC and Automation Controller, Automotive Body and HVAC Control Module, USB Peripherals and Human Interface Devices, Ethernet-Connected IoT Gateway, Graphical HMI Touch Panel, IoT Sensor Node with Edge Processing, Digital Audio Amplifier and Sound Module.
Industrial PLC and Automation Controller
The ATSAME51J20A-AF is well-suited for industrial PLCs and automation controllers because its 120 MHz Cortex-M4F core delivers 150 CoreMark / 1.25 DMIPS per MHz, enough headroom for IEC 61131-3 runtime execution plus EtherNet/IP and Modbus TCP stacks. The two CAN-FD controllers handle fieldbus and 1 MSPS ADC samples analog sensor channels for closed-loop control. The 1 MB dual-panel Flash with ECC supports in-place firmware updates during plant runtime without downtime, while the 256 KB SRAM holds TCP/IP sockets, USB-CDC buffers, and deterministic control loop state. AEC-Q100 qualification and the -40 C to +125 C operating range allow deployment in unconditioned cabinets.
Recomendado
Automotive Body and HVAC Control Module
The ATSAME51J20A-AF fits automotive body control and HVAC modules because AEC-Q100 qualification and the extended -40 C to +125 C temperature range meet automotive under-hood reliability requirements. The two CAN-FD channels provide 2 Mbps communication with the vehicle's central gateway, while the 1 MSPS 12-bit ADC samples temperature, pressure, and blower-motor current sensors in real time. The Cortex-M4F FPU accelerates floating-point HVAC control-loop math, and the Event System offloads peripheral-to-peripheral signaling without CPU intervention. The dual-panel Flash with ECC supports secure OTA firmware updates required for modern vehicle architectures.
Recomendado
USB Peripherals and Human Interface Devices
The ATSAME51J20A-AF is ideal for USB peripherals including HID devices, audio interfaces, and industrial HMI panels because the integrated USB 2.0 Full-Speed controller with on-chip PHY eliminates external transceiver cost. The 120 MHz Cortex-M4F handles USB class stack processing with sub-microsecond interrupt latency, while the two I2S controllers enable digital audio streaming for USB-DAC and USB-headset designs. The 256 KB SRAM supports USB descriptors, audio buffers, and HID report state simultaneously. The internal 48 MHz DFLL locks to USB Start-of-Frame, removing the need for an external 12 MHz crystal.
Recomendado
Ethernet-Connected IoT Gateway
The ATSAME51J20A-AF targets Ethernet-connected IoT gateways because the integrated 10/100 Ethernet MAC with 1588 Precision Time Protocol (PTP) hardware support delivers accurate timestamping for synchronized sensor data. The 1 MB dual-panel Flash stores gateway firmware and TLS certificates, while the 256 KB SRAM accommodates TCP/IP socket buffers plus an MQTT client. The 4 SERCOM interfaces support concurrent SPI sensor buses, I2C peripheral control, and UART debug output. The Cortex-M4F DSP extensions accelerate FFT and AES-128 for local signal processing and on-chip encryption without external crypto accelerators.
Recomendado
Graphical HMI Touch Panel
The ATSAME51J20A-AF drives small graphical HMI panels because the parallel camera/PCC interface connects directly to SPI-based LCD controllers or to RGB parallel TFTs with external bridge, and the I2S peripheral supports audio playback for alarms. The 120 MHz Cortex-M4F core drives LVGL, emWin, or Microchip's Harmony graphics frameworks at 30+ FPS on QVGA panels with anti-aliased fonts. The 1 MB dual-panel Flash stores multiple language assets and bitmap resources, while the 256 KB SRAM holds the framebuffer and event queue. AEC-Q100 qualification allows use in automotive center-console and instrument-cluster displays.
Recomendado
IoT Sensor Node with Edge Processing
The ATSAME51J20A-AF fits edge-computing IoT sensor nodes because the Cortex-M4F DSP extensions enable on-chip FFT, FIR filtering, and machine-learning inference for vibration, acoustic, or power-quality monitoring. The 1 MSPS 12-bit ADC captures wide-bandwidth analog signals with hardware oversampling, while the 256 KB SRAM holds sliding window buffers and inference state. The two CAN-FD channels allow integration with industrial IIoT backbones, and Ethernet MAC 1588 support enables precision-timestamped industrial synchronization. Sleep current of sub-10 microamps in deep-sleep mode with RTC running supports battery-backed deployments.
Recomendado
Digital Audio Amplifier and Sound Module
The ATSAME51J20A-AF supports digital audio amplifier front-ends and sound modules because the two I2S controllers deliver full-duplex 24-bit audio at 192 kHz, and the Cortex-M4F DSP extensions accelerate real-time FIR/IIR filter coefficients and parametric EQ. The 1 MB dual-panel Flash stores audio effects presets, voice prompts, and multi-language firmware, while 256 KB SRAM holds ring buffers and DSP coefficient tables. The two CAN-FD interfaces support vehicle-audio integration, and the parallel camera interface enables audio plus visual product designs. The 12-bit DAC provides auxiliary analog line-level outputs for testing and monitoring.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAME51J20A-AF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATSAME51J20A-AU | ATSAME51J19A-AFT | ATSAMD51J20A-AF | ATSAME51J20A-AZT | ATSAME51G20A-AF | ATSAMD51J20A-AUT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz |
| Flash | 1 MB | 1 MB | 512 KB (-50%) | 1 MB | 1 MB | 1 MB | 1 MB |
| SRAM | 256 KB | 256 KB | 192 KB (-25%) | 256 KB | 256 KB | 128 KB (-50%) | 256 KB |
| TrustZone-M | Yes | Yes | Yes | No (full MPU instead) | Yes | Yes | No (full MPU instead) |
| CAN-FD Channels | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Principais diferenciais
- Highest Flash and SRAM density in SAM E51 family in TQFP-64 (vs ATSAME51J19A-AFT)
- TrustZone-M hardware isolation for secure firmware (vs ATSAMD51J20A-AF)
- Full 256 KB SRAM supports TCP/IP + USB stack concurrency (vs ATSAME51G20A-AF)
Notas de projeto
Place a 1 uF X7R ceramic bypass capacitor close to each VDDCORE pin and a 100 nF X7R decoupling capacitor on every VDDIO pin pair, as recommended in the Microchip SAM E51 hardware design checklist. For noise-sensitive analog ADC applications, place a 10 uF bulk capacitor at the supply entry point and route a separate analog ground pour under ADC inputs. Do not exceed 3.63 V on VDDIO or the part will latch-up. If the design uses USB, add a 1 uF capacitor on VBUS and route the 90 ohm USB differential pair to a USB connector with controlled impedance (90 ohm differential).
Route the 32.768 kHz crystal traces PA00/PA01 symmetrically with a guard ground pour and keep them short (under 5 mm) to avoid coupling noise into the RTC. For the high-speed SD card / QSPI signals, maintain 50 ohm single-ended controlled impedance and match length within 1 mm across byte lanes. The Ethernet RMII/MII signals should be routed as length-matched pairs (<= 50 mil mismatch) on the same layer as the LAN8742A PHY. Expose the SWDIO/SWCLK pins on a debug header for field firmware updates.
Estimated: at maximum CPU activity (120 MHz, all peripherals active, DMAC operating, I/O toggling), the ATSAME51J20A-AF typically consumes around 70 mW at 3.3 V. With TQFP-64 theta_JA around 50 C/W (per Microchip package thermal data), the junction temperature rises approximately 3.5 C above ambient at 25 C ambient. At 85 C ambient industrial temperature, junction temperature reaches approximately 88 C, well below the 125 C maximum. The dual-panel Flash with ECC helps detect thermal-induced bit errors during long-term operation.
Avoid enabling the Cortex-M4F FPU before initializing the Stack Pointer (SP) and vector table - the FPU lazy stacking requires correct NVIC configuration, or hard-faults will occur on first floating-point interrupt. Do not rely on the internal DFLL for USB operation without first configuring the 32 kHz crystal reference or USB SOF source - the DFLL may drift if VDDIO is unstable. When using the dual-panel Flash for OTA updates, ensure the BOOTPROT fuse is set correctly to prevent accidental bootloader overwrite. TrustZone-M is a one-time fuse setting - confirm security policy before commissioning.
Keep the analog reference VDDCORE bypass return path short by placing vias adjacent to the GND side of each decoupling capacitor. For CAN-FD bus signals (PA27 CAN0 TX, PB22 CAN1 TX, PB23 CAN1 RX), place the MCP2562FD transceiver within 25 mm of the MCU pins to minimize radiated emissions. The Ethernet RMII interface requires source-synchronous clock routing - place the LAN8742A ETH_CLK within 50 mm and route on the inner layer with continuous ground reference. For FCC/CE compliance, surround the 32 kHz crystal with a ground island and route both traces over the same reference plane.
Informações de conformidade
AEC-Q100 Grade 1 qualified per Microchip product family documentation. RoHS and REACH compliant per Microchip material declaration. Lead-free and halogen-free per datasheet ordering information.
