ATSAME51N20A-AF - 120MHz Cortex-M4F MCU 1MB Flash | Microchip
料号： ATSAME51N20A-AF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.8 | $9.80 |
| 10 | $8.82 | $88.20 |
| 100 | $7.97 | $797.00 |
| 500 | $7.2 | $3,600.00 |
| 1,000 | $6.55 | $6,550.00 |
ATSAME51N20A-AF 概述
Background: An ARM Cortex-M4F microcontroller is a 32-bit MCU class member of the ARM Cortex-M family designed for deterministic real-time embedded applications. The 'F' suffix denotes the integrated single-precision IEEE-754 Floating Point Unit (FPU). Microcontrollers sit within the embedded processor taxonomy as MCU -> ARM Cortex-M -> Cortex-M4F -> industrial-grade. The SAM E51 family specifically targets industrial connectivity, motor control, and human-machine interface (HMI) designs requiring deterministic Cortex-M performance plus high-density on-chip memory.
Key features: 120 MHz Cortex-M4F core with DSP extensions and FPU; 1 MB dual-bank Flash supporting in-field firmware updates without downtime; 256 KB SRAM with ECC for transient-fault robustness; full-speed USB 2.0 device/host with integrated PHY; CAN-FD peripheral; SD/MMC host controller; up to 81 programmable I/O lines; SERCOM configurable serial engine (USART/SPI/I2C); 12-bit ADC with up to 16 channels and 1 MSPS; 12-bit DAC output channels; multiple timer/counter channels supporting PWM, capture, and quadrature decode; 1.71 V to 3.6 V single-supply operation; AEC-Q100 qualification on the -AF part.
Technical depth: The ATSAME51N20A-AF implements a 5-stage pipeline Harvard architecture with single-cycle MAC and hardware divider. The dual-panel Flash enables block-level EEPROM emulation and live firmware swap-over, useful in industrial gateways that must update over CAN or USB without halting the application. The peripheral event system and DMAC reduce CPU load by allowing peripherals to trigger each other and memory moves without core intervention, critical for motor-control loops above 50 kHz.
Typical applications: industrial IoT gateways with CAN-FD connectivity, low-end HMI panels with TFT LCD and touch, USB-based data acquisition modules, sensor hubs with CAN backbone, and motor-control BLDC/PMSM drivers with field-oriented control (FOC). The 81 GPIO count also supports keypad scanning and multi-segment LCD bridging via the integrated SLCD peripheral.
Design consideration: At 120 MHz the core draws roughly 30 mA from VDDCORE; decoupling requires a 1 uF plus 100 nF pair near each VDD pin, and the dual-bank Flash erase/write cycle (typically 25 k cycles endurance) should be factored in when planning log-structured data storage. For AEC-Q100 designs, validate the -AF temperature grade against your in-cabinet profile.
This page synthesizes drop-in alternatives, parametric comparison, and practical design notes beyond the manufacturer datasheet summary, giving engineers an at-a-glance procurement and design view of the ATSAME51N20A-AF.
直接替换替代料： ATSAME51N20A-AF ——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： ATSAME51N20A-AF （相同外形与封装尺寸） ——差异在于 SRAM, CAN, ADC, Operating Temperature, USB.
快速对比工具——选择替代料号进行并排对比：
ATSAME51N19A-AF
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →ATSAME51J19A-AFT
✅ 直接替换✓ 有现货
$5.62 / 个
查看数据手册 →ATSAME51J19A-AF
✅ 直接替换✓ 有现货
$3.85 / 个
查看数据手册 →ATSAME51J18A-AFT
✅ 直接替换✓ 有现货
$5.21 / 个
查看数据手册 →ATSAMD51N20A-AF
✅ 直接替换✓ 有现货
$6.84 / 个
查看数据手册 →ATSAMD51N19A-AF
✅ 直接替换✓ 有现货
$5.41 / 个
查看数据手册 →ATSAME51N20A-AF 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 |
| Program Memory | 1 MB (1M x 8) Flash with ECC, dual-panel |
| SRAM | 256 KB with ECC |
| Supply Voltage (VDD) | 1.71 V to 3.6 V |
| 工作温度 | -40C to +125C (industrial, AEC-Q100) |
| 封装 | 100-pin TQFP (14x14 mm) |
| Programmable I/O Pins | 81 |
| USB | USB 2.0 Full-Speed Device/Host with integrated PHY |
| CAN | CAN 2.0B + CAN-FD |
| ADC | 12-bit, up to 16 channels, 1 MSPS |
| DAC | 12-bit, 2 channels |
| Serial Engines (SERCOM) | Configurable USART/SPI/I2C, multiple instances |
| Timers | Multiple TC channels for PWM/capture/quadrature |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
| AEC-Q100 | Qualified |
| Family | SAM E51 (SAM D5x/E5x family) |
ATSAME51N20A-AF 100-pin tqfp (14x14 mm) 引脚配置指南
ATSAME51N20A-AF（100-pin tqfp (14x14 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATSAME51N20A-AF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAME51N20A-AF 适用于 7 应用s: Industrial IoT Gateway with CAN-FD, BLDC / PMSM Motor Control (FOC), USB Data Acquisition Module, Automotive Sensor Hub / Body Controller, Human-Machine Interface (HMI) with TFT LCD, Smart Energy / Metering, Industrial Sensor Hub with IO-Link.
Industrial IoT Gateway with CAN-FD
The ATSAME51N20A-AF fits industrial IoT gateways thanks to its Cortex-M4F 120 MHz core, dual-panel 1 MB Flash, and integrated CAN-FD peripheral. In a typical gateway, the MCU aggregates sensor data over CAN-FD at 5 Mbit/s, runs an embedded TLS stack in Flash, and pushes telemetry upstream over the integrated USB 2.0 Full-Speed PHY. The dual-bank Flash allows in-field firmware updates over CAN without halting the polling loop. The 1.71-3.6 V supply range covers battery-backed and industrial 24 V (post-regulation) rails. Compared with a smaller Cortex-M0+ MCU the ATSAME51N20A-AF adds 1.5 DMIPS/MHz headroom for encrypted handshakes and JSON parsing. Design tip: pair the ATSAME51N20A-AF with a CAN-FD transceiver such as the MCP2562FD for ISO 11898-1:2015 compliance.
推荐
BLDC / PMSM Motor Control (FOC)
The ATSAME51N20A-AF is a strong fit for field-oriented control (FOC) of BLDC and PMSM motors up to several kilowatts. Its Cortex-M4F core executes the Clarke-Park transform, PI current loop, and SVPWM in under 5 microseconds at 120 MHz, leaving CPU headroom for speed/torque profiling and CAN-FD command updates. The 12-bit 1 MSPS ADC with hardware oversampling and the multiple TC channels for center-aligned PWM directly drive the three-phase inverter. With 256 KB SRAM the entire motor model fits in on-chip memory, eliminating external SDRAM latency. Design tip: use the peripheral event system to trigger ADC sampling from the TC overflow event, removing jitter from the FOC loop.
推荐
USB Data Acquisition Module
For a USB-tethered data acquisition (DAQ) module, the ATSAME51N20A-AF combines 120 MHz Cortex-M4F DSP performance, integrated USB 2.0 Full-Speed PHY (no external crystal needed for USB), and a 12-bit 1 MSPS ADC. Streaming at 8 kSPS across 8 channels occupies roughly 2% of the CPU budget, leaving capacity for FFT analysis and protocol framing. The 1 MB dual-bank Flash hosts both firmware and bulk endpoint descriptors, while 256 KB SRAM doubles as a sample buffer and USB endpoint ring. Compared with an external PHY MCU pair, the integrated PHY shrinks the BOM by $0.50 and reduces PCB area. Design tip: use the DMAC to move ADC results into the USB endpoint buffer without CPU intervention.
推荐
Automotive Sensor Hub / Body Controller
The ATSAME51N20A-AF, with its AEC-Q100 qualification and -40C to +125C operating range, is suitable for non-safety automotive ECUs such as body controllers and sensor hubs. CAN-FD links the part to the vehicle backbone at 2 Mbit/s, while the ADC reads multiple analog sensors (temperature, pressure) simultaneously. The 81 GPIO count handles discrete I/O for relays, LEDs, and LIN-managed loads. Dual-bank Flash enables OTA-style firmware updates over CAN, increasingly required by OEMs. Design tip: add an external watchdog such as the MCP1316 for ISO 26262 ASIL-A readiness.
推荐
Human-Machine Interface (HMI) with TFT LCD
For low-cost graphical HMI panels, the ATSAME51N20A-AF's 120 MHz Cortex-M4F and 1 MB Flash drive small TFT LCDs up to 320x240 via the integrated EBI or SPI. The two 12-bit DACs generate contrast backlight PWM and audio feedback. SERCOM peripherals connect to a capacitive touch controller over I2C and a Wi-Fi/BLE module over SPI. The 256 KB SRAM holds a full-screen framebuffer at 16 bpp, avoiding external SDRAM. Design tip: use the integrated SLCD peripheral for low-power segmented LCD keypads as a fallback when the TFT is off.
推荐
Smart Energy / Metering
In smart energy metering the ATSAME51N20A-AF measures AC line voltage and current via its 12-bit ADC while computing RMS, power, and harmonic content on the Cortex-M4F. CAN-FD or the integrated USB exposes metrology data to the concentrator. The 1 MB Flash hosts the metrology stack plus DLMS/COSEM or Modbus framing. AEC-Q100 grade plus 1.71-3.6 V operation supports battery-backed metering installations. Design tip: leverage the SAM E51 peripheral event system to trigger ADC conversions from a zero-crossing timer, minimizing phase error.
推荐
Industrial Sensor Hub with IO-Link
The ATSAME51N20A-AF's Cortex-M4F + SERCOM + CAN-FD combination is well suited to IO-Link master and sensor hub applications. Each SERCOM instance runs an IO-Link channel at 230.4 kbaud, with the Cortex-M4F handling process data framing and diagnostic events. The 1 MB dual-panel Flash supports both master firmware and the IO-Link IODD interpreter. Compared with low-pin-count MCUs the ATSAME51N20A-AF consolidates 4 IO-Link ports plus a CAN-FD uplink on a single chip. Design tip: use DMA-driven SERCOM RX to keep CPU headroom for cycle-time scheduling.
推荐
推荐产品汇总
工程参考数据： ATSAME51N20A-AF ——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 | ATSAME51N19A-AF | ATSAME51J19A-AFT | ATSAME51J19A-AF | ATSAME51J18A-AFT | ATSAMD51N20A-AF | ATSAMD51N19A-AF |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (14x14) | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - 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 | 512 KB | 512 KB | 512 KB | 256 KB | 1 MB | 512 KB |
| SRAM | 256 KB | 192 KB | 192 KB | 192 KB | 128 KB | 256 KB | 192 KB |
| CAN-FD | Yes | Yes | Yes | Yes | Yes | No | No |
| USB FS PHY | Integrated | Integrated | Integrated | Integrated | Integrated | Integrated | Integrated |
| AEC-Q100 | Qualified (-AF) | Qualified (-AF) | Qualified (-AFT) | Qualified (-AF) | Qualified (-AFT) | Qualified (-AF) | Qualified (-AF) |
关键差异点
- Dual-panel 1 MB Flash for in-field firmware swap （对比 ATSAME51N19A-AF)
- Integrated CAN-FD with acceptance filtering （对比 ATSAMD51N20A-AF)
- Full-speed USB 2.0 device/host with integrated PHY （对比 Lower-pin Cortex-M0+ MCUs)
设计说明
Decouple the ATSAME51N20A-AF with a 1 uF plus 100 nF ceramic pair within 5 mm of each VDD/VDDIO pin and a bulk 10 uF on the main 3.3 V rail. The integrated 1.2 V VDDCORE LDO requires its own 1 uF + 100 nF cap pair. Estimated core current at 120 MHz is 30-35 mA, peaking to 60 mA during Flash writes; size the rail accordingly to avoid brown-outs during dual-bank firmware updates.
Place the 12 MHz crystal (or use the internal 12 MHz DFLL reference) within 5 mm of XIN/XOUT, with a ground guard ring. Keep USB DP/DM traces 90 ohm differential-matched and no stubs. Reserve room for the SWD header (SWDIO/SWDCLK/RESET) - SAM E51 firmware debug without SWD is impractical. Place the CAN-FD transceiver within 10 mm of the CAN pins to minimize stubs on the bus.
Do not program the dual-panel Flash simultaneously on both banks - this can lock the device for several seconds. Configure the NVMCTRL write protection before enabling interrupts from the NVM ready flag, otherwise spurious interrupts can halt execution. The SERCOM pins are multiplexed; verify the peripheral pin select via the PORT Group PMC settings before assuming a UART/I2C function is active. Finally, AEC-Q100 grade does NOT imply ASIL compliance - add an external watchdog (e.g., MCP1316) and parity-protected SRAM for safety elements.
合规信息
AEC-Q100 qualified per -AF part designation. RoHS and REACH per Microchip product page. Halogen-free status not explicitly confirmed in retrieved web data - mark unknown.
