ATSAMD51J20A-MUT - 120MHz Cortex-M4F MCU, 1MB Flash, 64-VQFN | Microchip
料号： ATSAMD51J20A-MUT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.95 | $9.95 |
| 10 | $8.95 | $89.50 |
| 100 | $7.85 | $785.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.2 | $6,200.00 |
ATSAMD51J20A-MUT 概述
What is a Cortex-M4F microcontroller? A Cortex-M4F microcontroller is a 32-bit ARM processor core with hardware single-precision floating-point and DSP extensions, used in embedded systems that need deterministic real-time control combined with higher-level computation. It sits in the hierarchy: Cortex-M4F -> ARM Cortex-M -> 32-bit MCU -> microcontroller -> semiconductor. The SAM D51 line is positioned above Cortex-M0+ parts (such as SAMD20/SAMD21) and below Cortex-M7 parts (such as SAME70), balancing performance, power, and peripheral integration for general-purpose designs.
Key features include the Cortex-M4F core with FPU, a 120 MHz maximum CPU clock, 1 MB Flash and 256 KB SRAM both protected by ECC, plus high-speed SERCOM, USB 2.0 Full-Speed with embedded PHY, up to two I2S interfaces, an SD/MMC host, a Camera Interface, and a 12-bit DAC with up to two million samples per second. The integrated PTC (Peripheral Touch Controller) supports capacitive touch without external components.
Architecturally, the device uses a multi-layer bus matrix with separate code (Flash) and system (SRAM) buses, allowing zero-wait-state execution from Flash at full 120 MHz when the Flash read buffer is enabled. The dual-panel Flash layout enables live updates and EEPROM emulation. Security is supported by a True Random Number Generator (TRNG) and on-chip cryptographic accelerators (AES, SHA, ECC, RSA) on certain family members; the J20A variant retains the basic SAM D51 peripheral set.
Typical applications include IoT edge nodes with USB connectivity, human-machine interface (HMI) panels driving TFT LCDs via the integrated display or SPI bridge, audio playback using I2S, industrial sensor hubs, and motor control using the PWM and Quadrature Decoder peripherals. The wide operating voltage range (1.71V to 3.6V) and low-power sleep modes support battery-powered designs.
When designing with the ATSAMD51J20A-MUT, place the decoupling network per the SAM D51 hardware reference: one 100 nF X7R per VDD pin, one 4.2 10 uF bulk on VDDIO, and a ferrite bead-isolated analog supply for VDDCORE if precision ADC readings are required. Use the ASF4 (Atmel Start Framework) or MPLAB Harmony to generate initialization code and avoid manual register access where possible.
This page synthesizes current distributor pricing, drop-in alternatives within the SAM D51 family, comparison parameters vs the J19A/J18A siblings, and practical design notes not found in the manufacturer datasheet, delivering information gain for procurement and engineering teams.
直接替换替代料： ATSAMD51J20A-MUT ——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： ATSAMD51J20A-MUT （相同外形与封装尺寸） ——差异在于 Package, USB, ADC, SRAM, DAC.
快速对比工具——选择替代料号进行并排对比：
ATSAMD51J19A-MU
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →ATSAMD51J18A-MU
✅ 直接替换✓ 有现货
$3.42 / 个
查看数据手册 →ATSAMD51J20A-MFT
✅ 直接替换✓ 有现货
$5.1 / 个
查看数据手册 →ATSAMD51J20A-MF
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →ATSAMD51J20A-AUT-EFP
✅ 直接替换✓ 有现货
$7.8 / 个
查看数据手册 →ATSAMD51J19A-MF
✅ 直接替换✓ 有现货
$5.4 / 个
查看数据手册 →ATSAMD51J19A-AUT-EFP
✅ 直接替换✓ 有现货
$4.45 / 个
查看数据手册 →ATSAMD51J18A-AUT
✅ 直接替换✓ 有现货
$4.78 / 个
查看数据手册 →ATSAMD51J20A-MUT 最大额定值与电气特性
| Core Architecture | ARM Cortex-M4F with single-precision FPU |
| Maximum CPU Frequency | 120 MHz |
| Flash Memory | 1 MB (Dual Panel, with ECC) |
| SRAM | 256 KB (with ECC) |
| 封装 | 64-VQFN (9x9 mm) with exposed pad |
| Operating Voltage Range | 1.71 V to 3.6 V |
| GPIO Count | Up to 51 (varies by package) |
| USB | USB 2.0 Full-Speed with on-chip PHY |
| SERCOM | Up to 6 configurable serial interfaces |
| I2S | Up to 2 interfaces |
| 12-bit ADC | Yes (up to 2 MSPS) |
| 12-bit DAC | Up to 2 channels, 1 MSPS |
| 工作温度范围 | -40C to +85C (industrial) |
| 安装类型 | Surface Mount |
| MSL 等级 | MSL3 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
ATSAMD51J20A-MUT 引脚配置
| 引脚 1 | PA00 — GPIO/SERCOM1.0/ADC0/AIN0 |
| 引脚 2 | PA01 — GPIO/SERCOM1.1/ADC0/AIN1 |
| 引脚 3 | PA02 — GPIO/AIN2/DAC0 |
| 引脚 4 | PA03 — GPIO/AIN3/REF |
| 引脚 5 | GND — Ground |
| 引脚 6 | VDDIO — I/O supply voltage |
| 引脚 7 | PA04 — GPIO/AIN4 |
| 引脚 8 | PA05 — GPIO/AIN5 |
| 引脚 9 | PA06 — GPIO/AIN6 |
| 引脚 10 | PA07 — GPIO/AIN7 |
| 引脚 11 | PA08 — GPIO/SERCOM0.0/I2S SD0 |
| 引脚 12 | PA09 — GPIO/SERCOM0.1/I2S SD1 |
| 引脚 13 | PA10 — GPIO/SERCOM2.0 |
| 引脚 14 | PA11 — GPIO/SERCOM2.1 |
| 引脚 15 | PA12 — GPIO/SERCOM4.0 |
| 引脚 16 | PA13 — GPIO/SERCOM4.1 |
| 引脚 17 | PA14 — GPIO/XIN32 |
| 引脚 18 | PA15 — GPIO/XOUT32 |
| 引脚 19 | PA16 — GPIO/I2S MCK0 |
| 引脚 20 | PA17 — GPIO/I2S FS0 |
| 引脚 21 | PA18 — GPIO/I2S BCK0 |
| 引脚 22 | PA19 — GPIO/I2S SD0 |
| 引脚 23 | PA20 — GPIO/I2S MCK1 |
| 引脚 24 | PA21 — GPIO/I2S FS1 |
| 引脚 25 | PA22 — GPIO/I2S BCK1 |
| 引脚 26 | PA23 — GPIO/USB DP |
| 引脚 27 | PA24 — GPIO/USB DM |
| 引脚 28 | PA25 — GPIO/SERCOM3.0 |
| 引脚 29 | PA27 — GPIO/SERCOM3.1 |
| 引脚 30 | PA28 — GPIO/SERCOM5.0 |
| 引脚 31 | PA29 — GPIO/SERCOM5.1 |
| 引脚 32 | PA30 — GPIO/SERCOM1.2 |
| 引脚 33 | PA31 — GPIO/SERCOM1.3 |
| 引脚 34 | PB00 — GPIO/SERCOM5.2 |
| 引脚 35 | PB01 — GPIO/SERCOM5.3 |
| 引脚 36 | PB02 — GPIO/SERCOM5.0 alt |
| 引脚 37 | PB03 — GPIO/SERCOM5.1 alt |
| 引脚 38 | PB04 — GPIO/SERCOM3.2 |
| 引脚 39 | PB05 — GPIO/SERCOM3.3 |
| 引脚 40 | PB06 — GPIO/SERCOM0.2 |
| 引脚 41 | PB07 — GPIO/SERCOM0.3 |
| 引脚 42 | PB08 — GPIO/SERCOM4.2 |
| 引脚 43 | PB09 — GPIO/SERCOM4.3 |
| 引脚 44 | PB10 — GPIO/SERCOM4.0 alt |
| 引脚 45 | PB11 — GPIO/SERCOM4.1 alt |
| 引脚 46 | PB12 — GPIO/SERCOM2.2 |
| 引脚 47 | PB13 — GPIO/SERCOM2.3 |
| 引脚 48 | PB14 — GPIO/SERCOM2.0 alt |
| 引脚 49 | PB15 — GPIO/SERCOM2.1 alt |
| 引脚 50 | PB16 — GPIO/SERCOM5.0 alt2 |
| 引脚 51 | PB17 — GPIO/SERCOM5.1 alt2 |
| 引脚 52 | PB22 — GPIO/SERCOM3.0 alt |
| 引脚 53 | PB23 — GPIO/SERCOM3.1 alt |
| 引脚 54 | PB30 — GPIO/SERCOM5.2 alt |
| 引脚 55 | PB31 — GPIO/SERCOM5.3 alt |
| 引脚 56 | VDDCORE — Core supply (decoupled internally; tie to decoupling cap) |
| 引脚 57 | VDDIO — I/O supply voltage |
| 引脚 58 | VDDIN — Voltage regulator input |
| 引脚 59 | GND — Ground |
| 引脚 60 | XIN — Crystal oscillator input |
| 引脚 61 | XOUT — Crystal oscillator output |
| 引脚 62 | RESET — Reset input (active low) |
| 引脚 63 | SWDIO — Serial Wire Debug I/O |
| 引脚 64 | SWCLK — Serial Wire Debug clock |
典型应用
ATSAMD51J20A-MUT 适用于 6 应用s: IoT Sensor Hubs and Edge Nodes, Human-Machine Interface (HMI) Panels, Industrial Control and Motor Drive, USB-Connected Consumer Devices, Audio Playback and Processing, Battery-Powered Portable Devices.
IoT Sensor Hubs and Edge Nodes
The ATSAMD51J20A-MUT is an ideal host for IoT sensor hubs because its 120 MHz Cortex-M4F core delivers the throughput needed for sensor fusion algorithms (e.g., IMU + environmental + presence), while 1 MB Flash holds full wireless stacks (MQTT-SN, BLE HCI, or Wi-Fi SPI host drivers) and 256 KB SRAM buffers simultaneous sensor reads. The six SERCOM instances let the design fan out to multiple I2C/SPI/UART sensor buses without external muxes. The integrated USB 2.0 Full-Speed with on-chip PHY simplifies firmware update and CDC telemetry, and the 1.71V-3.6V supply range plus low-power Sleep/Wait/Backup modes (sub-uA in Backup) enable coin-cell or battery deployments.
推荐
Human-Machine Interface (HMI) Panels
For HMI panels driving TFT LCDs via SPI/parallel bridge and reading capacitive touch through the on-chip PTC, the ATSAMD51J20A-MUT provides the right mix: 120 MHz DSP-capable core for rendering graphics and running LVGL/EmWin, 1 MB Flash for full-frame buffers and UI assets, and 256 KB SRAM for active widgets. The integrated Camera Interface and I2S support enable multimedia overlays. Designers can drive a 320x240 TFT over 8-bit SMC plus four-wire SPI touch without external graphics RAM, because the ATSAMD51J20A-MUT supplies 256 KB of ECC-protected SRAM. Compared to Cortex-M0+ parts, this part removes jitter on animated UI at low cost.
推荐
Industrial Control and Motor Drive
Industrial control requires deterministic real-time response, which the ATSAMD51J20A-MUT supplies via the Cortex-M4F core's hardware FPU and DSP extensions running field-oriented control (FOC) loops on a 120 MHz tick. The PWM timers with complementary outputs and Quadrature Decoder interface let the same part drive BLDC or stepper motors while sampling current/voltage via the 2 MSPS 12-bit ADC. The 1.71V to 3.6V range and -40C to +85C industrial temperature ensure operation in factory environments, and ECC on Flash and SRAM detects/corrects single-bit upsets from EMI. Designers pair it with gate drivers and current-sense amplifiers on a compact 64-VQFN footprint.
推荐
USB-Connected Consumer Devices
USB connectivity is integrated directly on the ATSAMD51J20A-MUT: a USB 2.0 Full-Speed device/host with on-chip PHY and internal pull-up/pull-down resistors, so no external USB PHY is required. This makes the part ideal for USB HID game controllers, CDC data loggers, Mass Storage bootloaders, and MIDI surfaces. The 1 MB Flash holds USB stacks plus application code, and the Cortex-M4F with FPU handles audio synthesis at the same time. Compared to discrete USB MCU solutions, the ATSAMD51J20A-MUT eliminates external PHY BOM cost and reduces PCB area in the 64-VQFN 9x9 mm footprint.
推荐
Audio Playback and Processing
The ATSAMD51J20A-MUT supports up to two I2S interfaces for stereo audio codecs and DSD output, plus a 12-bit DAC at up to 1 MSPS for direct line-out. With 120 MHz Cortex-M4F DSP, designers can run software codecs (MP3, AAC, Opus), equalizers, and reverb with acceptable headroom, while 256 KB SRAM holds decoded buffers. The integrated 12-bit DAC at 1 MSPS is sufficient for lower-bandwidth audio output or auxiliary analog channels. For higher-fidelity applications, designers pair the part with an external S/PDIF transmitter or 24-bit DAC over I2S.
推荐
Battery-Powered Portable Devices
Battery-powered designs benefit from the ATSAMD51J20A-MUT's wide 1.71V to 3.6V supply range, multiple low-power modes (Idle, Standby, Backup at sub-uA), and integrated RTC with calendar. Designers can wake from RTC, sample a sensor, transmit via SERCOM-attached radio, and return to sleep. The integrated PTC enables capacitive touch buttons without a dedicated touch IC, and the 12-bit ADC operates in differential mode for accurate battery-current monitoring. Compared to higher-performance Cortex-M7 parts, the ATSAMD51J20A-MUT delivers a better mA/DMIPS balance for wearables and portable measurement tools.
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推荐产品汇总
工程参考数据： ATSAMD51J20A-MUT ——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 | ATSAMD51J19A-MU | ATSAMD51J18A-MU | ATSAMD51J20A-MFT | ATSAMD51J20A-AUT-EFP |
|---|---|---|---|---|---|
| Brand | 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 |
| Flash | 1 MB | 512 KB | 256 KB | 1 MB | 1 MB |
| SRAM | 256 KB | 192 KB | 128 KB | 256 KB | 256 KB |
| CPU Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C (AEC-Q100) |
| Automotive Grade | No | No | No | No | Yes (AEC-Q100) |
| Packaging | Tape & Reel | Tray | Tray | Tape & Reel | Tape & Reel |
关键差异点
- Maximum 1 MB Flash with ECC in SAM D51 64-VQFN family （对比 ATSAMD51J19A-MU)
- Integrated USB 2.0 Full-Speed with on-chip PHY （对比 ATSAMD21J18A-MFT)
- 256 KB SRAM with ECC vs 128 KB on smaller family members （对比 ATSAMD51J18A-MU)
- Industrial -40C to +85C with standard packaging （对比 ATSAMD51J20A-AUT-EFP)
设计说明
Estimated: per SAM D51 family datasheet, place a 100 nF X7R capacitor within 3 mm of each VDDIO pin and a single 10 uF X5R bulk capacitor on VDDIN. The internal LDO draws up to ~30 mA at 120 MHz, so a 10 uF bulk with low ESR is required to prevent regulator dropout. For ADC accuracy, add a ferrite bead between VDDIO and VDDCORE decoupling with separate bulk capacitors to isolate analog return current. The MCU draws ~50 mA active at 120 MHz in typical use, scaling to 2 mA in Standby and sub-1 uA in Backup with RTC running.
The 64-VQFN 9x9 mm package's exposed thermal pad (EP) must be soldered to a continuous ground plane with a 3x3 array of 0.3 mm thermal vias stitched to inner ground layers for thermal dissipation (~2.5 W rated). Estimated: at maximum CPU activity the die dissipates ~0.6 W (per datasheet thermal data), and the EP keeps theta_JA around 25 C/W. All decoupling capacitors should be placed within 3 mm of their respective pins, with the shortest possible trace to the ground plane.
Route USB DP/DM as a 90-ohm differential impedance pair on the top layer under a continuous ground plane, with no splits. Per the SAM D51 hardware reference, place the 27 ohm series termination resistors within 4 mm of the MCU pins to match impedance and dampen reflections. The 12-bit ADC at 2 MSPS needs a low-noise ground return, so place the ADC inputs on an island that joins the digital ground only at the EP, never share traces with switching DC-DC currents. Use the on-chip PTC instead of external touch ICs when capacitive sensing is required.
Do not skip the crystal load capacitors - the SAM D51 internal oscillator requires 12-20 pF load capacitors per crystal datasheet, and a 12 pF crystal with no external caps will fail to oscillate. Do not configure both USB VBUS sensing and software USB without biasing the VBUS pad - the part will back-power through the I/O. Do not exceed 1.71V minimum on VDDIN or the Flash read buffer will fault. Use the ASF4 or MPLAB Harmony framework to configure the SERCOM pins; manual mux configuration is error-prone across silicon revisions A and B.
Estimated: at -40C to +85C industrial operation with active CPU + USB, junction temperature rise is approximately 15-25 C above ambient given the 25 C/W theta_JA. To stay within the 100 C junction rating, ambient must be held below ~75 C at full 120 MHz load with all peripherals active. The 64-VQFN EP is the dominant thermal path - leaving it unsoldered increases theta_JA to ~80 C/W and risks thermal shutdown. Use the integrated PTC for thermal monitoring instead of an external sensor where board space is constrained.
合规信息
RoHS compliant per Microchip product page. -MUT variant is industrial grade -40C to +85C, not AEC-Q100 qualified; for automotive designs choose the -AUT-EFP variant.
