ATSAMD51N19A-AF - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
料号： ATSAMD51N19A-AF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.58 | $75.80 |
| 100 | $6.74 | $674.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.41 | $5,410.00 |
ATSAMD51N19A-AF 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals around a common bus. Within the embedded semiconductor taxonomy, MCUs sit below microprocessors (which require external memory) and above basic ASICs in capability. The SAM D51 family is positioned as a high-performance general-purpose MCU, using the ARM Cortex-M4F core with single-precision FPU to accelerate DSP and floating-point control loops. ECC-protected Flash and SRAM target safety-critical and industrial applications where soft-error reliability matters.
Key features of the ATSAMD51N19A-AF include 120 MHz core clock with DSP extensions, 512 KB dual-panel Flash, up to 192 KB SRAM, six SERCOM modules configurable as UART/SPI/I2C, one full-speed USB 2.0 device/host, up to 12-bit 1 MSPS ADC with up to 16 channels, dual 12-bit DACs, four TC capture/compare/PWM channels, and a True Random Number Generator. The device supports 1.62V-3.6V supply and an extended industrial temperature range of -40C to +125C.
Architecturally, the ATSAMD51N19A-AF uses a 5-stage pipeline ARM Cortex-M4F core with single-precision FPU, MPU, and CoreSight debug. The dual-panel Flash allows simultaneous read/write, enabling live firmware updates without CPU stalls. The peripheral event system enables deterministic inter-peripheral signaling without CPU intervention, critical for motor control and power conversion applications.
Typical applications include industrial control (PLC I/O modules, motor drives), IoT edge nodes with secure TLS acceleration, USB peripherals (HID, CDC, composite), human-machine interfaces (HMI) with TFT touch control, audio processing with on-chip DAC, and portable instrumentation. The integrated crypto engine also suits secure-boot and OTA update designs.
When designing with the ATSAMD51N19A-AF, ensure decoupling follows the datasheet reference layout with 100 nF caps at each supply pin and a bulk 4.7 uF cap near the package. The TC and ADC reference grounds must be tied to a low-impedance analog ground plane. Verify the extended temperature option (-AF suffix) matches your application's thermal envelope.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing comparison-ready data for sourcing decisions.
直接替换替代料： ATSAMD51N19A-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： ATSAMD51N19A-AF （相同外形与封装尺寸） ——差异在于 USB, DAC, Operating Temperature, Package, ADC.
快速对比工具——选择替代料号进行并排对比：
ATSAMD51N19A-AFT
✅ 直接替换✓ 有现货
$4.8 / 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-MFT
✅ 直接替换✓ 有现货
$5.1 / 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 →ATSAMD51J18A-AU-EFP
✅ 直接替换✓ 有现货
$3.95 / 个
查看数据手册 →ATSAMD51G19A-MFT
✅ 直接替换✓ 有现货
$4.02 / 个
查看数据手册 →ATSAMD51N19A-AF 最大额定值与电气特性
| Core Architecture | ARM Cortex-M4F with FPU |
| Maximum CPU Frequency | 120 MHz |
| Program Flash Memory | 512 KB (dual-panel, with ECC) |
| SRAM | 192 KB (with ECC) |
| 封装 | 100-pin TQFP (14x14 mm) |
| Operating Voltage | 1.62 V to 3.6 V |
| 工作温度 | -40C to +125C (extended) |
| ADC | 12-bit, up to 1 MSPS |
| DAC | Dual 12-bit |
| USB | USB 2.0 Full-Speed device/host |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| Crypto Engine | AES, SHA, TRNG |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| MSL 等级 | 3 (168 hours) |
ATSAMD51N19A-AF 引脚配置
| 引脚 1 | VDDIO — Digital I/O supply voltage |
| 引脚 2 | PA00 — I/O line A00 (GPIO, analog) |
| 引脚 3 | PA01 — I/O line A01 (GPIO, analog) |
| 引脚 4 | PA02 — I/O line A02 (GPIO, analog) |
| 引脚 5 | PA03 — I/O line A03 (GPIO, analog) |
| 引脚 6 | GND — Ground |
| 引脚 7 | PA04 — I/O line A04 (GPIO, analog) |
| 引脚 8 | PA05 — I/O line A05 (GPIO, analog) |
| 引脚 9 | PA06 — I/O line A06 (GPIO, analog) |
| 引脚 10 | PA07 — I/O line A07 (GPIO, analog) |
| 引脚 11 | VDDIO — Digital I/O supply voltage |
| 引脚 12 | PA08 — SERCOM0/PAD0 or GPIO |
| 引脚 13 | PA09 — SERCOM0/PAD1 or GPIO |
| 引脚 14 | PA10 — SERCOM0/PAD2 or GPIO |
| 引脚 15 | PA11 — SERCOM0/PAD3 or GPIO |
| 引脚 16 | PA12 — SERCOM1/PAD0 or GPIO |
| 引脚 17 | PA13 — SERCOM1/PAD1 or GPIO |
| 引脚 18 | PA14 — SERCOM1/PAD2 or GPIO |
| 引脚 19 | PA15 — SERCOM1/PAD3 or GPIO |
| 引脚 20 | GND — Ground |
| 引脚 21 | PA16 — SERCOM2/PAD0 or GPIO |
| 引脚 22 | PA17 — SERCOM2/PAD1 or GPIO |
| 引脚 23 | PA18 — SERCOM2/PAD2 or GPIO |
| 引脚 24 | PA19 — SERCOM2/PAD3 or GPIO |
| 引脚 25 | PA20 — SERCOM3/PAD0 or GPIO |
| 引脚 26 | PA21 — SERCOM3/PAD1 or GPIO |
| 引脚 27 | PA22 — SERCOM3/PAD2 or GPIO |
| 引脚 28 | PA23 — SERCOM3/PAD3 or GPIO |
| 引脚 29 | PA24 — USB DP or GPIO |
| 引脚 30 | PA25 — USB DM or GPIO |
| 引脚 31 | VDDIO — Digital I/O supply voltage |
| 引脚 32 | GND — Ground |
| 引脚 33 | PB00 — I/O line B00 (GPIO, analog) |
| 引脚 34 | PB01 — I/O line B01 (GPIO, analog) |
| 引脚 35 | PB02 — SERCOM4/PAD0 or GPIO |
| 引脚 36 | PB03 — SERCOM4/PAD1 or GPIO |
| 引脚 37 | PB04 — SERCOM4/PAD2 or GPIO |
| 引脚 38 | PB05 — SERCOM4/PAD3 or GPIO |
| 引脚 39 | PB06 — SERCOM5/PAD0 or GPIO |
| 引脚 40 | PB07 — SERCOM5/PAD1 or GPIO |
| 引脚 41 | PB08 — SERCOM5/PAD2 or GPIO |
| 引脚 42 | PB09 — SERCOM5/PAD3 or GPIO |
| 引脚 43 | GND — Ground |
| 引脚 44 | PB10 — I/O line B10 (GPIO, analog) |
| 引脚 45 | PB11 — I/O line B11 (GPIO, analog) |
| 引脚 46 | PB12 — TC0/WO0 or GPIO |
| 引脚 47 | PB13 — TC0/WO1 or GPIO |
| 引脚 48 | PB14 — TC1/WO0 or GPIO |
| 引脚 49 | PB15 — TC1/WO1 or GPIO |
| 引脚 50 | PB16 — TC2/WO0 or GPIO |
| 引脚 51 | PB17 — TC2/WO1 or GPIO |
| 引脚 52 | VDDIO — Digital I/O supply voltage |
| 引脚 53 | PB18 — I/O line B18 (GPIO, analog) |
| 引脚 54 | PB19 — I/O line B19 (GPIO, analog) |
| 引脚 55 | PB20 — I/O line B20 (GPIO, analog) |
| 引脚 56 | PB21 — I/O line B21 (GPIO, analog) |
| 引脚 57 | PB22 — I/O line B22 (GPIO, analog) |
| 引脚 58 | PB23 — I/O line B23 (GPIO, analog) |
| 引脚 59 | PB24 — I/O line B24 (GPIO, analog) |
| 引脚 60 | PB25 — I/O line B25 (GPIO, analog) |
| 引脚 61 | PC00 — I/O line C00 (GPIO, analog) |
| 引脚 62 | PC01 — I/O line C01 (GPIO, analog) |
| 引脚 63 | PC02 — I/O line C02 (GPIO, analog) |
| 引脚 64 | PC03 — I/O line C03 (GPIO, analog) |
| 引脚 65 | VDDCORE — Core voltage output (LDO) |
| 引脚 66 | GND — Ground |
| 引脚 67 | VDDIN — Main voltage regulator input |
| 引脚 68 | PC04 — I/O line C04 (GPIO, analog) |
| 引脚 69 | PC05 — I/O line C05 (GPIO, analog) |
| 引脚 70 | PC06 — I/O line C06 (GPIO, analog) |
| 引脚 71 | PC07 — I/O line C07 (GPIO, analog) |
| 引脚 72 | PC08 — SERCOM6/PAD0 or GPIO |
| 引脚 73 | PC09 — SERCOM6/PAD1 or GPIO |
| 引脚 74 | PC10 — SERCOM6/PAD2 or GPIO |
| 引脚 75 | PC11 — SERCOM6/PAD3 or GPIO |
| 引脚 76 | PC12 — SERCOM7/PAD0 or GPIO |
| 引脚 77 | PC13 — SERCOM7/PAD1 or GPIO |
| 引脚 78 | PC14 — SERCOM7/PAD2 or GPIO |
| 引脚 79 | PC15 — SERCOM7/PAD3 or GPIO |
| 引脚 80 | GND — Ground |
| 引脚 81 | PC16 — I/O line C16 (GPIO, analog) |
| 引脚 82 | PC17 — I/O line C17 (GPIO, analog) |
| 引脚 83 | PC18 — I/O line C18 (GPIO, analog) |
| 引脚 84 | PC19 — I/O line C19 (GPIO, analog) |
| 引脚 85 | PC20 — I/O line C20 (GPIO, analog) |
| 引脚 86 | PC21 — I/O line C21 (GPIO, analog) |
| 引脚 87 | PC22 — I/O line C22 (GPIO, analog) |
| 引脚 88 | PC23 — I/O line C23 (GPIO, analog) |
| 引脚 89 | PD00 — I/O line D00 (GPIO, analog) |
| 引脚 90 | PD01 — I/O line D01 (GPIO, analog) |
| 引脚 91 | PD02 — I/O line D02 (GPIO, analog) |
| 引脚 92 | PD03 — I/O line D03 (GPIO, analog) |
| 引脚 93 | PD04 — I/O line D04 (GPIO, analog) |
| 引脚 94 | PD05 — I/O line D05 (GPIO, analog) |
| 引脚 95 | PD06 — I/O line D06 (GPIO, analog) |
| 引脚 96 | PD07 — I/O line D07 (GPIO, analog) |
| 引脚 97 | PD08 — I/O line D08 (GPIO, analog) |
| 引脚 98 | PD09 — I/O line D09 (GPIO, analog) |
| 引脚 99 | RESET_N — Active-low reset input |
| 引脚 100 | VDDIO — Digital I/O supply voltage |
典型应用
ATSAMD51N19A-AF 适用于 6 应用s: Industrial Control (PLC I/O Modules, Motor Drives), IoT Edge Nodes with TLS Acceleration, USB Peripherals (HID, CDC, Composite), Human-Machine Interfaces (HMI) with TFT Touch, Audio Processing with On-Chip DAC, Portable Instrumentation and Data Loggers.
Industrial Control (PLC I/O Modules, Motor Drives)
The ATSAMD51N19A-AF fits industrial PLC and motor-drive applications thanks to its 120 MHz Cortex-M4F core, hardware FPU for field-oriented control, and 192 KB SRAM for control-loop buffers. Its six SERCOM modules can drive UART to operator panels, SPI to gate drivers, and I2C to sensor chains simultaneously. The 12-bit 1 MSPS ADC samples current and voltage feedback accurately, while dual 12-bit DACs generate analog reference signals. Extended -40C to +125C temperature range tolerates factory-floor thermal stress. The integrated crypto engine supports signed firmware for functional-safety designs.
推荐
IoT Edge Nodes with TLS Acceleration
The ATSAMD51N19A-AF suits secure IoT edge nodes because the on-chip crypto engine accelerates AES-128/256 and SHA-2, offloading TLS handshakes from the CPU. The USB 2.0 Full-Speed interface enables direct tethering to gateways, while SERCOM ports interface LoRa, Wi-Fi, or BLE modules. 192 KB SRAM hosts TLS session buffers and MQTT payload queues without external memory. The dual-panel Flash supports secure over-the-air firmware updates. Operating from 1.62V to 3.6V permits direct Li-ion battery connection.
推荐
USB Peripherals (HID, CDC, Composite)
The ATSAMD51N19A-AF is ideal for USB peripherals due to its integrated USB 2.0 Full-Speed controller with on-chip transceiver. The Microchip ASF and MPLAB Harmony stacks provide ready-to-use HID, CDC, MSD, and composite class drivers. Cortex-M4F at 120 MHz handles protocol stack and application logic without external MCU support. 512 KB Flash stores composite descriptor tables plus application code. The 100-pin TQFP gives ample I/O for buttons, LEDs, and downstream SPI peripherals in human-interface devices.
推荐
Human-Machine Interfaces (HMI) with TFT Touch
The ATSAMD51N19A-AF drives TFT-LCD HMI panels with its high-speed SERCOM channels connecting to SPI-based display controllers. The Cortex-M4F core renders graphics via lightweight LVGL or emWin stacks in 192 KB SRAM. 12-bit ADC reads resistive touch coordinates accurately. The crypto engine secures HMI passwords and operator credentials. Extended temperature range supports outdoor kiosk and industrial panel deployments. Multiple TC channels generate PWM backlight dimming and buzzer tones.
推荐
Audio Processing with On-Chip DAC
The ATSAMD51N19A-AF delivers up to 16-bit audio quality through its dual 12-bit DACs at 1 MSPS, sufficient for voice prompts, alert tones, and simple waveform synthesis. Cortex-M4F DSP extensions accelerate FFT and biquad filtering in real time. SERCOM channels drive external I2S codecs for higher-fidelity paths. 192 KB SRAM buffers multi-second audio chunks without external memory. The USB Full-Speed interface streams 16 kHz audio to host PCs.
推荐
Portable Instrumentation and Data Loggers
The ATSAMD51N19A-AF fits portable instruments because its Cortex-M4F core processes sensor data, the 12-bit ADC digitizes multiple channels at 1 MSPS, and 192 KB SRAM stores acquisition buffers. USB Full-Speed enables real-time data streaming to a host PC. The 1.62V-3.6V supply range supports direct Li-ion battery operation with no external LDO. The crypto engine secures proprietary measurement data on removable media via SD-card interface.
推荐
推荐产品汇总
工程参考数据： ATSAMD51N19A-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 | ATSAMD51N19A-AFT | ATSAMD51J20A-MF | ATSAMD51J19A-MF | ATSAMD51J18A-AU | ATSAMD51G19A-MFT |
|---|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 mm) | TQFP-100 (14x14 mm) - same | LQFP-100 - same footprint family | QFN-64 (not pin-compatible) | LQFP-100 - same footprint family | QFN-48 (not pin-compatible) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Flash | 512 KB | 512 KB | 1024 KB | 512 KB | 256 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 256 KB | 192 KB | 128 KB | 192 KB |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +125C |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| Crypto Engine | AES, SHA, TRNG | AES, SHA, TRNG | AES, SHA, TRNG | AES, SHA, TRNG | AES, SHA, TRNG | AES, SHA, TRNG |
关键差异点
- Highest memory density in TQFP-100 SAM D51 family at 512 KB Flash + 192 KB SRAM （对比 ATSAMD51J18A-AU)
- Extended -40C to +125C industrial temperature range （对比 ATSAMD51J18A-AU)
- Tray packaging optimized for prototyping and low-volume assembly （对比 ATSAMD51N19A-AFT)
设计说明
Place a 100 nF decoupling capacitor within 2 mm of every VDDIO and VDDIN pin, plus one bulk 4.7 uF ceramic near the package. The internal LDO that generates VDDCORE requires a 1 uF low-ESR output cap on the VDDCORE pin. Routing the analog supply AVVDD through a ferrite bead from VDDIN isolates ADC noise; failure to do this can couple switching noise into ADC measurements and reduce effective ENOB.
The TQFP-100 package has a theta_JA around 50 C/W on a standard 4-layer JEDEC test board. At full CPU load running 120 MHz with all peripherals active, typical dissipation is around 200 mW, yielding a 10C rise above ambient. For industrial -40C to +125C operation, ensure ambient does not push junction above 125C. Wide copper pours beneath exposed pads and on inner layers reduce theta_JA to around 30 C/W.
The ATSAMD51N19A-AF pinout follows the SAM D51 family convention with PAxx/ PBxx/ PCxx/ PDxx ports grouped together and SERCOM alternate functions color-mapped in the datasheet. Maintain continuous ground plane under the MCU to provide low-impedance return paths for SERCOM and USB signals. Route USB DP/DM as a 90 ohm differential pair with length matching within 2 mm. Place the 32.768 kHz crystal within 5 mm of the XIN32/XOUT32 pins to minimize parasitic capacitance.
Do not skip configuring the NVMCTRL peripheral to enable dual-panel Flash and ECC; if left at default single-panel mode, write performance is reduced and ECC errors trigger unwanted NMI. To use USB, the VBUS pin must see 5V through a 10k pull-up divider, and the UDIV clock must be sourced from DFLL or PLL - not from the untrimmed 48 MHz RC. The crypto engine requires the ICache and DMA to be enabled to reach its AES throughput targets.
合规信息
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive ASIL designs, contact Microchip about ATSAME54/ATSAMV71 AEC-Q100 variants. MSL-3 moisture sensitivity level per JEDEC J-STD-020.
