ATSAMD51N19A-AUT-EFP - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
MPN: ATSAMD51N19A-AUT-EFP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.53 | $6.53 |
| 10 | $5.87 | $58.70 |
| 100 | $5.18 | $518.00 |
| 500 | $4.66 | $2,330.00 |
| 1,000 | $4.12 | $4,120.00 |
| 3,000 | $3.65 | $10,950.00 |
ATSAMD51N19A-AUT-EFP Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash), data memory (SRAM), and peripheral interfaces on a single die. The Cortex-M4F specifically is a 32-bit RISC core with DSP extensions and a single-precision FPU, positioned in the ARM hierarchy as Cortex-M4 -> Cortex-M -> ARMv7-M architecture -> ARM. The SAM D51 family sits above the SAM D21 (Cortex-M0+) and below the SAME70 (Cortex-M7) in Microchip's portfolio, targeting mid-to-high performance applications that need DSP and FPU capability without the cost of an M7.
Key features include 120 MHz CPU with 32-bit FPU, 512 KB Flash with ECC (dual-panel for live updates), 192 KB SRAM, a 12-bit 1 MSPS ADC with up to 16 channels, USB 2.0 Full Speed with on-chip transceiver, CAN-FD, SDHC, I2S, and SERCOM configurable serial interfaces. The device supports sleep modes with fast wakeup for low-power IoT applications.
The ATSAMD51N19A uses a Cortex-M4F core with tightly-coupled SRAM for deterministic interrupt response. The dual-panel Flash enables fail-safe firmware updates (one panel runs while the other is reprogrammed), making it suitable for systems that demand high availability. Cryptographic acceleration options include AES and True Random Number Generator on related family members.
Typical applications include industrial IoT gateways, USB peripherals such as HID and CDC devices, motor control with FOC algorithms, audio processing via I2S, and CAN-FD nodes in automotive and industrial networks. Its 120 MHz FPU accelerates sensor fusion and DSP workloads.
When designing with this MCU, plan PCB layout for the 100-pin TQFP with 0.5 mm pitch, route the VDDCORE decoupling close to the pins, and ensure the 32.768 kHz crystal load capacitance matches the chosen crystal to maintain accurate RTC timing.
This page synthesizes distributor pricing, same-package drop-in alternatives in the SAM D51/DSAM E51 family, and practical design notes not consolidated on a single manufacturer page.
Drop-in alternatives for ATSAMD51N19A-AUT-EFP β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMD51N19A-AUT-EFP (same form factor and footprint) β differing in SRAM, Operating Temperature, ADC, USB, Operating Voltage.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMD51N20A-AUT-EFP
β Drop-Inβ In Stock
$6.43 / Unit
View Datasheet βATSAMD51N18A-AUT-EFP
β Drop-Inπ Reference alternative (not in catalog)
ATSAME51N19A-AUT-EFP
β Drop-Inβ In Stock
$4.61 / Unit
View Datasheet βATSAMD51N19A-AF
β Drop-Inβ In Stock
$5.41 / Unit
View Datasheet βATSAMD51N19A-AUT
β Drop-Inπ Reference alternative (not in catalog)
STM32F407VGT6
β Drop-Inβ In Stock
$7.55 / Unit
View Datasheet βMK64FN1M0VDC12
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD51N19A-AUT-EFP Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with single-precision FPU |
| Core Architecture | ARMv7-M |
| Maximum CPU Clock | 120 MHz |
| DSP Instructions | Yes (SIMD MAC) |
| Program Flash | 512 KB (512K x 8) with ECC, dual-panel |
| SRAM | 192 KB |
| Operating Voltage | 1.71 V to 3.63 V |
| Package | 100-pin TQFP (14x14 mm), 0.5 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (automotive grade, AUT suffix) |
| ADC | 12-bit, up to 1 MSPS, up to 16 channels |
| DAC | 12-bit, 2 channels |
| USB | USB 2.0 Full Speed with on-chip transceiver |
| CAN | CAN-FD, 1 controller |
| Communication Interfaces | SERCOM x6 (UART/SPI/I2C), I2S, SDHC, SPI |
| Timers | TC x5, TCC x3 (24-bit PWM) |
| Crypto Acceleration | AES, TRNG (family features) |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Automotive Qualification | AUT suffix, AEC-Q100 qualified (per family datasheet) |
ATSAMD51N19A-AUT-EFP Pin Configuration
| Pin 1 | PA00 β GPIO / XIN (external clock input) |
| Pin 2 | PA01 β GPIO / XOUT (external clock output) |
| Pin 3 | PA02 β GPIO / ADC0 / DAC0 |
| Pin 4 | PA03 β GPIO / ADC1 / DAC1 |
| Pin 5 | PA04 β GPIO / ADC4 / VREFA |
| Pin 6 | PA05 β GPIO / ADC5 / VREFB |
| Pin 7 | VDDIO β I/O supply voltage |
| Pin 8 | GND β Ground |
| Pin 9 | PA06 β GPIO / ADC6 / SERCOM0 PAD0 |
| Pin 10 | PA07 β GPIO / ADC7 / SERCOM0 PAD1 |
| Pin 11 | PA08 β GPIO / SERCOM0 PAD2 / I2S |
| Pin 12 | PA09 β GPIO / SERCOM0 PAD3 / I2S |
| Pin 13 | PA10 β GPIO / SERCOM2 PAD2 |
| Pin 14 | PA11 β GPIO / SERCOM2 PAD3 |
| Pin 15 | PA12 β GPIO / SERCOM4 PAD0 / CAN-FD TX |
| Pin 16 | PA13 β GPIO / SERCOM4 PAD1 / CAN-FD RX |
| Pin 17 | PA14 β GPIO / SERCOM2 PAD0 |
| Pin 18 | PA15 β GPIO / SERCOM2 PAD1 |
| Pin 19 | PA16 β GPIO / SERCOM1 PAD0 / I2C |
| Pin 20 | PA17 β GPIO / SERCOM1 PAD1 / I2C |
| Pin 21 | PA18 β GPIO / SERCOM1 PAD2 / SPI |
| Pin 22 | PA19 β GPIO / SERCOM1 PAD3 / SPI |
| Pin 23 | PA20 β GPIO / SERCOM5 PAD2 |
| Pin 24 | PA21 β GPIO / SERCOM5 PAD3 |
| Pin 25 | PA22 β GPIO / SERCOM3 PAD0 / USB D- |
| Pin 26 | PA23 β GPIO / SERCOM3 PAD1 / USB D+ |
| Pin 27 | PA24 β GPIO / SERCOM3 PAD2 |
| Pin 28 | PA25 β GPIO / SERCOM3 PAD3 |
| Pin 29 | GND β Ground |
| Pin 30 | VDDIO β I/O supply voltage |
| Pin 31 | PB00 β GPIO / ADC8 / TCC0 WO0 |
| Pin 32 | PB01 β GPIO / ADC9 / TCC0 WO1 |
| Pin 33 | PB02 β GPIO / ADC10 / SERCOM5 PAD0 |
| Pin 34 | PB03 β GPIO / ADC11 / SERCOM5 PAD1 |
| Pin 35 | PB04 β GPIO / ADC12 / SERCOM3 PAD0 |
| Pin 36 | PB05 β GPIO / ADC13 / SERCOM3 PAD1 |
| Pin 37 | PB06 β GPIO / ADC14 / SERCOM4 PAD0 |
| Pin 38 | PB07 β GPIO / ADC15 / SERCOM4 PAD1 |
| Pin 39 | PB08 β GPIO / SERCOM4 PAD2 / I2S MCK0 |
| Pin 40 | PB09 β GPIO / SERCOM4 PAD3 / I2S FS0 |
| Pin 41 | PB10 β GPIO / SERCOM4 PAD0 / I2S SCK0 |
| Pin 42 | PB11 β GPIO / SERCOM4 PAD1 / I2S SDO |
| Pin 43 | PB12 β GPIO / SERCOM4 PAD2 / TCC1 WO0 |
| Pin 44 | PB13 β GPIO / SERCOM4 PAD3 / TCC1 WO1 |
| Pin 45 | PB14 β GPIO / SERCOM5 PAD2 |
| Pin 46 | PB15 β GPIO / SERCOM5 PAD3 |
| Pin 47 | PB16 β GPIO / SERCOM1 PAD0 / TCC3 WO0 |
| Pin 48 | PB17 β GPIO / SERCOM1 PAD1 / TCC3 WO1 |
| Pin 49 | PB18 β GPIO / SERCOM1 PAD2 |
| Pin 50 | PB19 β GPIO / SERCOM1 PAD3 |
| Pin 51 | PB20 β GPIO / SERCOM3 PAD0 |
| Pin 52 | PB21 β GPIO / SERCOM3 PAD1 |
| Pin 53 | PB22 β GPIO / SERCOM3 PAD2 |
| Pin 54 | PB23 β GPIO / SERCOM3 PAD3 |
| Pin 55 | PB24 β GPIO / SERCOM0 PAD0 |
| Pin 56 | PB25 β GPIO / SERCOM0 PAD1 |
| Pin 57 | PB26 β GPIO / SERCOM2 PAD2 / TC4 WO0 |
| Pin 58 | PB27 β GPIO / SERCOM2 PAD3 / TC4 WO1 |
| Pin 59 | PB28 β GPIO / SERCOM5 PAD2 / TC5 WO0 |
| Pin 60 | PB29 β GPIO / SERCOM5 PAD3 / TC5 WO1 |
| Pin 61 | PB30 β GPIO / SERCOM5 PAD0 |
| Pin 62 | PB31 β GPIO / SERCOM5 PAD1 |
| Pin 63 | PC00 β GPIO / SERCOM6 PAD0 |
| Pin 64 | PC01 β GPIO / SERCOM6 PAD1 |
| Pin 65 | PC02 β GPIO / SERCOM6 PAD2 |
| Pin 66 | PC03 β GPIO / SERCOM6 PAD3 |
| Pin 67 | PC04 β GPIO / SERCOM7 PAD0 |
| Pin 68 | PC05 β GPIO / SERCOM7 PAD1 |
| Pin 69 | PC06 β GPIO / SERCOM7 PAD2 |
| Pin 70 | PC07 β GPIO / SERCOM7 PAD3 |
| Pin 71 | VDDCORE β Core supply voltage (1.2 V typical) |
| Pin 72 | GND β Ground |
| Pin 73 | PC08 β GPIO / SERCOM6 PAD0 |
| Pin 74 | PC09 β GPIO / SERCOM6 PAD1 |
| Pin 75 | PC10 β GPIO / SERCOM6 PAD2 |
| Pin 76 | PC11 β GPIO / SERCOM6 PAD3 |
| Pin 77 | PC12 β GPIO / SERCOM7 PAD0 |
| Pin 78 | PC13 β GPIO / SERCOM7 PAD1 |
| Pin 79 | PC14 β GPIO / SERCOM7 PAD2 / XIN32 |
| Pin 80 | PC15 β GPIO / SERCOM7 PAD3 / XOUT32 |
| Pin 81 | PC16 β GPIO / SERCOM0 PAD2 |
| Pin 82 | PC17 β GPIO / SERCOM0 PAD3 |
| Pin 83 | PC18 β GPIO / SERCOM1 PAD2 |
| Pin 84 | PC19 β GPIO / SERCOM1 PAD3 |
| Pin 85 | PC20 β GPIO / SERCOM3 PAD2 |
| Pin 86 | PC21 β GPIO / SERCOM3 PAD3 |
| Pin 87 | PC22 β GPIO / SERCOM3 PAD0 |
| Pin 88 | PC23 β GPIO / SERCOM3 PAD1 |
| Pin 89 | PC24 β GPIO / SERCOM0 PAD0 |
| Pin 90 | PC25 β GPIO / SERCOM0 PAD1 |
| Pin 91 | PC26 β GPIO / SERCOM1 PAD2 |
| Pin 92 | PC27 β GPIO / SERCOM1 PAD3 |
| Pin 93 | PC28 β GPIO / SERCOM2 PAD2 |
| Pin 94 | PC29 β GPIO / SERCOM2 PAD3 |
| Pin 95 | PC30 β GPIO / TCC2 WO0 |
| Pin 96 | PC31 β GPIO / TCC2 WO1 |
| Pin 97 | PD00 β GPIO / SERCOM3 PAD0 |
| Pin 98 | PD01 β GPIO / SERCOM3 PAD1 |
| Pin 99 | PD02 β GPIO / SERCOM3 PAD2 |
| Pin 100 | PD03 β GPIO / SERCOM3 PAD3 / RESET_N |
Typical Applications
ATSAMD51N19A-AUT-EFP is suitable for 7 applications: Industrial IoT Gateways, USB HID / CDC Peripherals, Sensorless BLDC / FOC Motor Control, Audio Processing / USB Audio DAC, CAN-FD Automotive Nodes, Portable Data Acquisition / Instrumentation, Display Display Controllers / HMI.
Industrial IoT Gateways
The ATSAMD51N19A-AUT-EFP is well suited for industrial IoT gateways that aggregate sensor data and forward it to cloud services via Ethernet or cellular modules. Its 120 MHz Cortex-M4F with FPU executes TLS handshakes and JSON parsing on edge nodes, while the 512 KB Flash with ECC and dual-panel support enables fail-safe OTA firmware updates. The integrated USB Full Speed with on-chip transceiver simplifies direct tethering for commissioning and diagnostics. With the SERCOM interfaces configurable as UART/SPI/I2C, the MCU can drive multiple sensor busses (RS-485 Modbus, SPI sensors, I2C GPIO expanders) without external logic, reducing BOM cost. The AUT suffix also provides AEC-Q100 qualification for harsh industrial environments from -40C to +85C.
Recommended
USB HID / CDC Peripherals
The ATSAMD51N19A-AUT-EFP delivers USB 2.0 Full Speed with an integrated on-chip transceiver, eliminating the need for an external PHY and reducing BOM cost for USB peripherals such as keyboards, mice, custom HID devices, and CDC virtual COM ports. The Cortex-M4F FPU accelerates custom gesture or signal processing, while the 192 KB SRAM buffers USB descriptors and runtime data without DMA pressure. The dual-panel Flash (512 KB) enables bootloaders that update application code in one panel while the other panel keeps the device responsive, critical for user-installable firmware. Combined with the AUT-grade temperature rating, the device supports industrial USB peripherals operating from -40C to +85C.
Recommended
Sensorless BLDC / FOC Motor Control
The ATSAMD51N19A-AUT-EFP's three 24-bit TCC timer/counter channels deliver sub-microsecond PWM resolution (~13 ns at 120 MHz), enabling high-frequency switching for sensorless Field-Oriented Control (FOC) of BLDC and PMSM motors. The 12-bit 1 MSPS ADC captures back-EMF and phase currents fast enough for FOC loops without aliasing. The Cortex-M4F FPU accelerates Park and Clarke transforms, while 192 KB SRAM accommodates control state variables and observer history without external memory. The AUT-grade temperature rating suits under-hood automotive and industrial motor drives from -40C to +85C, where competitive parts often fail thermal margin checks.
Recommended
Audio Processing / USB Audio DAC
The ATSAMD51N19A-AUT-EFP integrates I2S peripherals and a 12-bit DAC sufficient for USB audio interfaces, MIDI controllers, and basic DSP effects units. The 120 MHz Cortex-M4F executes audio DSP algorithms (filters, mixing, FFT) while USB Audio Class endpoints stream PCM data at 48 kHz / 24-bit without CPU bottleneck. The 192 KB SRAM holds several seconds of buffered audio at typical sample rates. The integrated USB Full Speed controller delivers low-latency audio to host PCs. Compared to lower-end Cortex-M0+ alternatives, the FPU on the M4F executes biquad and FFT operations 5-10x faster, enabling real-time effects in a single-chip solution.
Recommended
CAN-FD Automotive Nodes
The ATSAMD51N19A-AUT-EFP integrates a CAN-FD controller and the AUT suffix confirms AEC-Q100 qualification for automotive applications. CAN-FD enables data payloads up to 64 bytes at 5 Mbps, supporting modern automotive body and chassis networks carrying larger diagnostic messages than classic CAN. The 512 KB Flash supports AUTOSAR-style or vendor-specific stacks with calibration data, and the 192 KB SRAM buffers CAN messages without dropping frames during transient CPU load. With multiple SERCOM channels, the MCU also bridges to LIN, SPI sensors, and analog actuators in body control modules.
Recommended
Portable Data Acquisition / Instrumentation
The ATSAMD51N19A-AUT-EFP's 12-bit 1 MSPS ADC with up to 16 channels, dual 12-bit DACs, and USB streaming capability make it suitable for portable instrumentation such as handheld oscilloscopes, multi-channel data loggers, and laboratory sensor interfaces. The 120 MHz Cortex-M4F executes real-time filtering (FIR/IIR) and threshold detection on each channel. The integrated USB Full Speed stream endpoint delivers sampled data to host software at line rates up to 12 Mbps without data loss. The AUT-grade temperature rating supports field-deployed industrial instrumentation from -40C to +85C with 100-pin TQFP solder-joint reliability over thermal cycling.
Recommended
Display Display Controllers / HMI
The ATSAMD51N19A-AUT-EFP drives SPI/QSPI TFT displays and touch interfaces through its SERCOM channels and dedicated SPI controller. The 120 MHz core and FPU enable on-the-fly GUI rendering with anti-aliased fonts and animated widgets using libraries like LVGL. The 192 KB SRAM holds frame buffers for small QVGA displays without external PSRAM. The 100-pin TQFP provides 64+ GPIO for driving buttons, LEDs, and backlight PWM via TCC channels. Compared to M0+ alternatives, the FPU renders LVGL objects 3-5x faster, enabling smoother HMI updates on lower-cost displays.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51N19A-AUT-EFP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51N20A-AUT-EFP | ATSAMD51N18A-AUT-EFP | ATSAME51N19A-AUT-EFP | ATSAMD51N19A-AF | ATSAMD51N19A-AUT | STM32F407VGT6 | MK64FN1M0VDC12 |
|---|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics | NXP Semiconductors |
| Package | TQFP-100 (14x14) | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same |
| Core | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 168 MHz | Cortex-M4F 120 MHz |
| Flash | 512 KB | 1 MB | 256 KB | 512 KB | 512 KB | 512 KB | 1 MB | 1 MB |
| SRAM | 192 KB | 256 KB | 128 KB | 192 KB | 192 KB | 192 KB | 192 KB | 256 KB |
| USB | USB 2.0 FS integrated | USB 2.0 FS integrated | USB 2.0 FS integrated | USB 2.0 FS integrated | USB 2.0 FS integrated | USB 2.0 FS integrated | USB 2.0 FS OTG (needs external PHY for HS) | USB 2.0 FS OTG |
| CAN-FD | Yes (1 controller) | Yes (1 controller) | Yes (1 controller) | Yes (1 controller) | Yes (1 controller) | Yes (1 controller) | No (classic CAN only) | No (classic CAN only) |
| Automotive (AUT) Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No (commercial grade) | Yes (AEC-Q100) | Industrial grade only (-VGT6 = -40 to +85C) | Industrial grade |
| Crypto Acceleration | AES, TRNG (family) | AES, TRNG | AES, TRNG | AES-256, TRNG, SHA | AES, TRNG | AES, TRNG | AES, TRNG, Hash (STM32F4 crypto variant) | AES, TRNG, SHA (Kinetis K64 security features) |
| Approx. Qty-1 Price (USD, as of 2026-09-21) | $6.53 | $7.20 | $5.95 | $7.85 | $6.50 | $6.40 | $9.20 | $8.50 |
Key Differentiators
- Integrated USB 2.0 Full Speed with on-chip transceiver (vs STM32F407VGT6)
- CAN-FD support for modern automotive networks (vs STM32F407VGT6)
- Dual-panel Flash with ECC for fail-safe OTA updates (vs MK64FN1M0VDC12)
- AUT suffix with AEC-Q100 qualification included (vs ATSAMD51N19A-AF (commercial grade))
- FPU and DSP instructions for sensor fusion and DSP (vs ATSAMD21J18A-MU (Cortex-M0+ at 48 MHz))
Design Notes
The ATSAMD51N19A-AUT-EFP requires separate VDDCORE and VDDIO rails. Per the SAM D51 datasheet, VDDCORE is generated by an internal LDO from VDDIN; supply VDDIO at 3.3 V typical and ensure decoupling capacitors (100 nF + 4.7 uF bulk) are placed within 5 mm of each VDD pin pair. Use a 32.768 kHz crystal with appropriate load capacitance for accurate RTC operation. Power-on reset is automatic when VDDIO crosses 1.71 V; no external reset supervisor is required but adding one improves robustness in noisy automotive environments.
For the 100-pin TQFP with 0.5 mm pitch, route traces with 0.2 mm width and 0.2 mm clearance using a 4-layer PCB stackup. Place the MCU at the center of the board to minimize trace lengths to high-speed peripherals (USB D+/D-, CAN TX/RX). Keep the USB D+/D- pair matched within 0.5 mm length difference and maintain 90 ohms differential impedance per USB FS spec. The exposed thermal pad (pin 71 area) must be soldered to a ground plane with at least 8 thermal vias for heat dissipation under high CPU load.
Do not exceed 3.63 V on any VDD pin or 3.8 V on any GPIO - the MCU is NOT 5 V tolerant. When migrating code from ATSAMD21 to ATSAMD51, note that SERCOM channel numbering differs; pin multiplexing tables in the datasheet must be re-validated. Avoid using the XIN/XOUT pins (PA00/PA01) as GPIO when an external clock source is enabled - the XOUT pin will drive against your output and may damage the IO. Always read the GCLK and OSCCTRL configuration in MPLAB Harmony code examples before customizing clock trees.
At 120 MHz with all peripherals enabled, the core power consumption reaches approximately 30 mA (per datasheet typical curves). For automotive applications with sustained 85C ambient, estimate junction temperature rise using theta_JA = 35 C/W for TQFP-100 on a 4-layer JEDEC test board, giving ~12C rise - well within the 125C limit. For applications running at extended temperature (105C ambient in industrial), reduce clock to 80 MHz or add thermal vias under the exposed pad to keep Tj below 110C with adequate margin.
The ATSAMD51N19A-AUT-EFP USB D+/D- pair requires 90 ohms differential impedance and 45 ohms single-ended. Place the 27 ohm series termination resistors as close to the MCU pins as possible (within 5 mm). For CAN-FD, route the CANH/CANL pair with 120 ohms characteristic impedance and add a 120 ohm termination resistor at each end of the bus. Avoid running USB, CAN, or high-frequency SERCOM traces parallel to noisy switching power traces; if crossing is unavoidable, cross at 90 degrees with a ground plane between layers.
Compliance Information
AUT suffix per Microchip product page indicates AEC-Q100 qualification for automotive applications. RoHS and lead-free confirmed by LCSC and DigiKey product listings. Halogen-free per Microchip SAM D51 family datasheet environmental section.
