ATSAME51J20A-MU - 120MHz Cortex-M4F MCU, 1MB Flash, 64-VQFN | Microchip
料号： ATSAME51J20A-MU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.4 | $104.00 |
| 100 | $9.25 | $925.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.65 | $7,650.00 |
ATSAME51J20A-MU 概述
What is a Cortex-M4F microcontroller? A Cortex-M4F MCU is a 32-bit processor core based on the ARMv7-M architecture with a hardware single-precision Floating Point Unit and a DSP instruction set extension. Within the embedded hierarchy it sits between Cortex-M3 (no FPU) and Cortex-M7 (higher performance, double-precision FPU), and it serves as the workhorse core for industrial control, motor drives, audio processing, and connected IoT endpoints where deterministic interrupt response and floating-point math are both required.
Key features of the ATSAME51J20A-MU include a 120 MHz core with 2.14 CoreMark/MHz efficiency, 1 MB dual-panel Flash supporting live in-field updates, 256 KB SRAM, a high-speed 16-channel 1 Msps 12-bit ADC, two 12-bit DACs, USB 2.0 Full-Speed with embedded Host, a CAN-FD controller, SERCOM (configurable serial) interfaces, and an on-board crypto accelerator supporting AES, SHA and TRNG. The integrated 32-channel EVENT system and SmartEEPROM emulation reduce software overhead.
Architecturally the device is built around a multi-bus AHB matrix with dedicated SRAM and Flash ports, enabling zero-wait-state execution from Flash at full clock speed. The peripheral DMA controller (DMAC) and dedicated crypto DMA relieve the core from data-movement tasks, and the dual-panel Flash allows read-while-write firmware upgrades without external memory. The 9x9 mm 64-VQFN with exposed thermal pad supports industrial ambient operation from -40 °C to +85 °C.
Typical applications include industrial control and Human-Machine Interface (HMI) panels, USB-to-CAN bridges, sensor aggregation nodes, motor control low-end FOC loops, audio front-ends, and connected IoT edge nodes using the integrated crypto block. With USB, CAN-FD, and SERCOM, the same silicon serves as a protocol-conversion gateway between legacy RS-485 and modern fieldbus networks.
Designers should pay attention to decoupling: place one 100 nF X7R plus one 10 µF bulk capacitor on each VDD/VDDIO pin pair within 3 mm of the pad, and stitch the exposed pad with at least nine thermal vias to a continuous inner-plane ground for optimal 120 MHz operation. Because the SAM E51 family is footprint-compatible with the SAM D51 family, you can scale memory between 256 KB and 1 MB without PCB rework.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM E5x family, and practical PCB layout notes not found in the manufacturer datasheet alone.
直接替换替代料： ATSAME51J20A-MU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAME51J20A-MU （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, DAC, SRAM.
快速对比工具——选择替代料号进行并排对比：
ATSAME51J20A-MU-EFP
✅ 直接替换✓ 有现货
$5.34 / 个
查看数据手册 →ATSAME51J19A-MU
✅ 直接替换✓ 有现货
$4.65 / 个
查看数据手册 →ATSAME51J18A-MU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD51J20A-MU
✅ 直接替换✓ 有现货
$4.75 / 个
查看数据手册 →ATSAME53J20A-MU
✅ 直接替换✓ 有现货
$7.48 / 个
查看数据手册 →ATSAME51N20A-AU-EFP
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.1 / 个
查看数据手册 →ATSAME51J20A-MU 最大额定值与电气特性
| Core | ARM Cortex-M4F with single-precision FPU |
| 最大时钟频率 | 120 MHz |
| CoreMark Efficiency | 2.14 CoreMark/MHz |
| Flash Memory | 1 MB (1M x 8) dual-panel with ECC |
| SRAM | 256 KB |
| ADC | 16-channel, 12-bit, 1 Msps |
| DAC | 2 x 12-bit |
| USB | USB 2.0 Full-Speed with embedded Host |
| CAN | CAN-FD controller |
| Crypto Accelerator | AES, SHA, TRNG |
| SERCOM | Configurable serial interfaces |
| EVENT System | 32 channels |
| Operating Voltage | 3.3 V |
| 封装 | 64-VQFN (9x9 mm) with exposed pad |
| 工作温度 | -40 °C to +85 °C |
| 安装类型 | Surface Mount |
ATSAME51J20A-MU 引脚配置
| 引脚 1 | VDDIO — Digital I/O supply |
| 引脚 2 | PA00 — GPIO / SERCOM1[0] |
| 引脚 3 | PA01 — GPIO / SERCOM1[1] |
| 引脚 4 | PA02 — GPIO / ADC[0] |
| 引脚 5 | PA03 — GPIO / ADC[1] |
| 引脚 6 | PA04 — GPIO / VREFA |
| 引脚 7 | PA05 — GPIO |
| 引脚 8 | PA06 — GPIO |
| 引脚 9 | PA07 — GPIO |
| 引脚 10 | VDDIO — Digital I/O supply |
| 引脚 11 | VSS — Ground |
| 引脚 12 | PA08 — GPIO / SERCOM0[0] |
| 引脚 13 | PA09 — GPIO / SERCOM0[1] |
| 引脚 14 | PA10 — GPIO / SERCOM2[2] |
| 引脚 15 | PA11 — GPIO / SERCOM2[3] |
| 引脚 16 | PA12 — GPIO / SERCOM4[0] |
| 引脚 17 | PA13 — GPIO / SERCOM4[1] |
| 引脚 18 | PA14 — GPIO |
| 引脚 19 | PA15 — GPIO |
| 引脚 20 | PA16 — GPIO / SERCOM1[0] |
| 引脚 21 | PA17 — GPIO / SERCOM1[1] |
| 引脚 22 | PA18 — GPIO |
| 引脚 23 | PA19 — GPIO |
| 引脚 24 | VDDIO — Digital I/O supply |
| 引脚 25 | PA20 — GPIO |
| 引脚 26 | PA21 — GPIO |
| 引脚 27 | PA22 — GPIO |
| 引脚 28 | PA23 — GPIO |
| 引脚 29 | PA24 — GPIO / USB_DM |
| 引脚 30 | PA25 — GPIO / USB_DP |
| 引脚 31 | PA26 — GPIO |
| 引脚 32 | PA27 — GPIO |
| 引脚 33 | PA28 — GPIO |
| 引脚 34 | PA29 — GPIO |
| 引脚 35 | PA30 — GPIO |
| 引脚 36 | PA31 — GPIO |
| 引脚 37 | PB00 — GPIO |
| 引脚 38 | PB01 — GPIO |
| 引脚 39 | PB02 — GPIO / SERCOM5[0] |
| 引脚 40 | PB03 — GPIO / SERCOM5[1] |
| 引脚 41 | PB04 — GPIO / SERCOM3[0] |
| 引脚 42 | PB05 — GPIO / SERCOM3[1] |
| 引脚 43 | PB06 — GPIO |
| 引脚 44 | PB07 — GPIO |
| 引脚 45 | PB08 — GPIO |
| 引脚 46 | PB09 — GPIO |
| 引脚 47 | PB10 — GPIO |
| 引脚 48 | PB11 — GPIO |
| 引脚 49 | PB12 — GPIO |
| 引脚 50 | PB13 — GPIO |
| 引脚 51 | PB14 — GPIO |
| 引脚 52 | PB15 — GPIO |
| 引脚 53 | PC00 — GPIO |
| 引脚 54 | PC01 — GPIO |
| 引脚 55 | PC02 — GPIO |
| 引脚 56 | PC03 — GPIO |
| 引脚 57 | PC04 — GPIO |
| 引脚 58 | PC05 — GPIO |
| 引脚 59 | PC06 — GPIO |
| 引脚 60 | PC07 — GPIO |
| 引脚 61 | VDDIO — Digital I/O supply |
| 引脚 62 | VSS — Ground |
| 引脚 63 | VDD — Core supply |
| 引脚 64 | RESETN — Reset (active low) |
典型应用
ATSAME51J20A-MU 适用于 6 应用s: Industrial HMI Control Panels, USB-to-CAN Bridge Dongles, Sensor Aggregation Edge Nodes, Low-End FOC Motor Control, Audio Front-End Processing, Connected IoT Edge Nodes with Hardware Crypto.
Industrial HMI Control Panels
The ATSAME51J20A-MU's 120 MHz Cortex-M4F core, 1 MB dual-panel Flash, and 16-channel 12-bit ADC make it well matched to industrial Human-Machine Interface (HMI) panels that combine a touchscreen controller, multi-channel sensor readout, and CAN-FD fieldbus. The hardware FPU accelerates GUI rendering math and FFT-based signal conditioning on the same MCU. With USB, CAN-FD, and SERCOM, the panel can act as a protocol-conversion gateway between legacy RS-485 and modern fieldbus networks without an external bridge IC.
推荐
USB-to-CAN Bridge Dongles
The ATSAME51J20A-MU integrates both USB 2.0 Full-Speed with embedded Host and a CAN-FD controller, which lets one IC implement a complete USB-to-CAN bridge dongle for automotive diagnostics and industrial fieldbus tools. The 256 KB SRAM buffers high-throughput CAN-FD frames while USB traffic is serviced, and the hardware crypto block can authenticate diagnostic sessions. Compared to a two-chip USB-plus-CAN design, the SAM E51 reduces PCB area and BOM by at least one MCU plus a transceiver.
推荐
Sensor Aggregation Edge Nodes
For industrial IoT edge nodes aggregating multiple analog and digital sensors, the ATSAME51J20A-MU provides 16 channels of 12-bit ADC sampling at 1 Msps, plus SERCOM channels for I2C/SPI sensor expansion. The 32-channel EVENT system and DMAC offload routine data-movement tasks, freeing the Cortex-M4F for higher-level aggregation and edge analytics. With 1 MB Flash, the node can host a full TLS stack plus device-management firmware without external memory.
推荐
Low-End FOC Motor Control
Low-end Field-Oriented Control (FOC) loops for fans, pumps, and small BLDC drives fit comfortably in the ATSAME51J20A-MU thanks to its 120 MHz Cortex-M4F with hardware FPU and DSP extensions. The 16-channel 12-bit ADC samples three-phase currents simultaneously with hardware oversampling, and the EVENT system synchronizes ADC triggers to PWM edges with deterministic latency. Designers can run 8 kHz FOC loops while leaving CPU headroom for CAN-FD telemetry and USB commissioning on the same die.
推荐
Audio Front-End Processing
The ATSAME51J20A-MU's two 12-bit DACs, 120 MHz Cortex-M4F DSP extensions, and 256 KB SRAM are sufficient for audio front-end processing such as beamforming pre-processing, sample-rate conversion, and basic DSP filtering. The hardware FPU accelerates biquad and FFT routines while the 16-channel ADC handles multi-mic capture. Combined with the 1 MB Flash budget, designers can host full audio-pipeline firmware with comfortable headroom for future feature expansion.
推荐
Connected IoT Edge Nodes with Hardware Crypto
Connected IoT edge nodes benefit from the ATSAME51J20A-MU's hardware crypto accelerator (AES, SHA, TRNG), which offloads TLS handshake and authentication without burdening the Cortex-M4F core. The dual-panel Flash supports secure OTA firmware updates with rollback to the previous image if a new image fails to boot. USB, CAN-FD, and SERCOM give designers a single-chip secure gateway for industrial or building-automation deployments.
推荐
推荐产品汇总
工程参考数据： ATSAME51J20A-MU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAME51J20A-MU-EFP | ATSAME51J19A-MU | ATSAMD51J20A-MU | ATSAME53J20A-MU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Core | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz |
| Flash Memory | 1 MB | 1 MB | 512 KB | 1 MB | 1 MB |
| SRAM | 256 KB | 256 KB | 192 KB | 256 KB | 256 KB |
| Hardware Crypto | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | No | AES/SHA/TRNG |
| USB | FS with embedded Host | FS with embedded Host | FS with embedded Host | FS with embedded Host | HS PHY + FS with embedded Host |
| CAN | CAN-FD | CAN-FD | CAN-FD | CAN-FD | CAN-FD |
| Extended Flash Performance | No | Yes | No | No | No |
关键差异点
- Same-family drop-in scalability between 256 KB and 1 MB Flash （对比 ATSAME51J19A-MU)
- Adds hardware crypto accelerator absent on SAM D51 （对比 ATSAMD51J20A-MU)
- Cost-down versus SAM E53 when High-Speed USB PHY is not required （对比 ATSAME53J20A-MU)
设计说明
Decoupling: place one 100 nF X7R plus one 10 µF bulk capacitor on each VDD/VDDIO pin pair within 3 mm of the pad. The exposed thermal pad must be stitched with at least nine thermal vias to a continuous inner-plane ground for reliable 120 MHz operation across -40 °C to +85 °C.
Crystal layout: route the 12 MHz external crystal traces symmetrically and keep them short; the SAM E51's PLL multiplies this clock to 120 MHz and noisy layouts will cause jitter or PLL unlock. Keep crystal traces away from switching DC-DC nodes and digital I/O edges.
Power sequencing: VDDIO must rise no later than VDD, and the RESETN pin must be held low until both rails are stable. Failing to observe sequencing can cause latch-up on the I/O cells during cold-start; refer to the SAM E51 datasheet power-up section for the timing diagram.
合规信息
RoHS and REACH compliance per Microchip product page. Industrial-grade -40 °C to +85 °C operating range; AEC-Q100 is not applicable for non-automotive SKUs.
