ATSAMD51J19A-MUT - ARM Cortex-M4F 120MHz MCU 512KB Flash | Microchip
MPN: ATSAMD51J19A-MUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.76 | $7.76 |
| 10 | $6.98 | $69.80 |
| 100 | $6.21 | $621.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $5.02 | $5,020.00 |
| 3,000 | $4.45 | $13,350.00 |
ATSAMD51J19A-MUT Overview
A microcontroller (microcontroller = MCU = embedded controller) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of communication peripherals. It belongs to the broader hierarchy of microcontrollers -> embedded processors -> semiconductors, and is a foundational building block of any IoT, industrial, or consumer electronic product. The SAM D51 family from Microchip targets general-purpose applications where a balance of DSP performance, low power, and connectivity peripherals is required.
Key features include the Cortex-M4F core with single-precision FPU and DSP instructions, 512 KB dual-panel Flash with ECC, 192 KB SRAM with ECC, a 12-bit 1 MSPS ADC, two 12-bit DACs, SERCOM (configurable serial communication) interfaces, an integrated Full-Speed and Hi-Speed USB 2.0 device/host interface, an I2S audio interface, and a CAN-FD controller. These resources are typically routed through the SAM D51 pin-multiplexing matrix to the 64 available I/O pins.
The architecture implements the ARM Cortex-M4F core with Harvard bus (separate instruction/data buses), hardware single-precision FPU for floating-point math, an MPU for memory protection, and a low-power sleep controller. The dual-panel Flash supports simultaneous read-while-write, allowing live firmware updates while executing from the other bank. ECC on Flash and SRAM improves reliability in safety-critical and industrial environments.
Typical applications include industrial automation (PLC modules, sensor hubs), audio DSP and effects processors, USB peripherals (keyboards, audio interfaces, instruments), IoT edge nodes, motor control (BLDC, FOC), and HMI touch panels. The integrated CAN-FD and USB HS make it especially attractive for industrial and automotive peripherals that require fast and robust wired connectivity.
Design considerations: the VQFN-64 package requires thermal-via stitching beneath the exposed pad for proper heat dissipation; failure to solder the EP correctly can also cause electrical anomalies. Decoupling follows the standard 100 nF per VDD pin plus 4.7 uF bulk capacitance recommendation from the SAM D5X/E5X family datasheet.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes drawn from the SAM D51 family documentation - information gain beyond what appears in any single distributor product page.
Drop-in alternatives for ATSAMD51J19A-MUT — 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 ATSAMD51J19A-MUT (same form factor and footprint) — differing in Package, USB, ADC, Operating Temperature, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51J19A-MU
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.1 / Unit
View Datasheet →ATSAMD51J19A-AUT-EFP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.45 / Unit
View Datasheet →ATSAMD51J19A-MF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.4 / Unit
View Datasheet →ATSAMD51J18A-MU
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.42 / Unit
View Datasheet →ATSAMD51G19A-MFT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.02 / Unit
View Datasheet →ATSAMD51J19A-MUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with single-precision FPU |
| Maximum CPU Clock | 120 MHz |
| DSP Instructions | Yes (single-cycle MAC, SIMD) |
| Program Flash | 512 KB dual-panel Flash with ECC |
| SRAM | 192 KB with ECC |
| Package | 64-pin VQFN (9x9 mm) with exposed pad |
| Operating Temperature | -40C to +85C (industrial) |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 2x 12-bit |
| USB | USB 2.0 Full-Speed + Hi-Speed device/host |
| CAN | 1x CAN-FD controller |
| I2S | Yes (audio interface) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
ATSAMD51J19A-MUT Pin Configuration
| Pin 1 | VDDIO — Digital I/O supply voltage |
| Pin 2 | PA00 — GPIO/SERCOM/I2S |
| Pin 3 | PA01 — GPIO/SERCOM/I2S |
| Pin 4 | PA02 — GPIO/SERCOM/ADC[0] |
| Pin 5 | PA03 — GPIO/SERCOM/ADC[1] |
| Pin 6 | GND — Ground |
| Pin 7 | VDD — Core supply voltage |
| Pin 8 | PA04 — GPIO/SERCOM/ADC[4] |
| Pin 9 | PA05 — GPIO/SERCOM/ADC[5] |
| Pin 10 | PA06 — GPIO/SERCOM/ADC[6] |
| Pin 11 | PA07 — GPIO/SERCOM/ADC[7] |
| Pin 12 | PA08 — GPIO/SERCOM/NSS |
| Pin 13 | PA09 — GPIO/SERCOM |
| Pin 14 | PA10 — GPIO/SERCOM |
| Pin 15 | PA11 — GPIO/SERCOM |
| Pin 16 | VDDIO — Digital I/O supply voltage |
| Pin 17 | GND — Ground |
| Pin 18 | PB00 — GPIO/SERCOM/ADC[8] |
| Pin 19 | PB01 — GPIO/SERCOM/ADC[9] |
| Pin 20 | PB02 — GPIO/SERCOM/ADC[10] |
| Pin 21 | PB03 — GPIO/SERCOM/ADC[11] |
| Pin 22 | PB04 — GPIO/SERCOM |
| Pin 23 | PB05 — GPIO/SERCOM |
| Pin 24 | PB06 — GPIO/SERCOM |
| Pin 25 | PB07 — GPIO/SERCOM |
| Pin 26 | PB08 — GPIO/SERCOM |
| Pin 27 | PB09 — GPIO/SERCOM |
| Pin 28 | PB10 — GPIO/SERCOM |
| Pin 29 | PB11 — GPIO/SERCOM |
| Pin 30 | VDDIO — Digital I/O supply voltage |
| Pin 31 | GND — Ground |
| Pin 32 | PC00 — GPIO/SERCOM |
| Pin 33 | PC01 — GPIO/SERCOM |
| Pin 34 | PC02 — GPIO/SERCOM |
| Pin 35 | PC03 — GPIO/SERCOM |
| Pin 36 | PC04 — GPIO/SERCOM |
| Pin 37 | PC05 — GPIO/SERCOM |
| Pin 38 | PC06 — GPIO/SERCOM |
| Pin 39 | PC07 — GPIO/SERCOM |
| Pin 40 | GND — Ground |
| Pin 41 | VDD — Core supply voltage |
| Pin 42 | PC08 — GPIO/SERCOM |
| Pin 43 | PC09 — GPIO/SERCOM |
| Pin 44 | PC10 — GPIO/SERCOM |
| Pin 45 | PC11 — GPIO/SERCOM |
| Pin 46 | PC12 — GPIO/SERCOM |
| Pin 47 | PC13 — GPIO/SERCOM |
| Pin 48 | PC14 — GPIO/SERCOM |
| Pin 49 | PC15 — GPIO/SERCOM |
| Pin 50 | PD00 — GPIO/SERCOM |
| Pin 51 | PD01 — GPIO/SERCOM |
| Pin 52 | PD02 — GPIO/SERCOM |
| Pin 53 | PD03 — GPIO/SERCOM |
| Pin 54 | PD04 — GPIO/SERCOM |
| Pin 55 | PD05 — GPIO/SERCOM |
| Pin 56 | PD06 — GPIO/SERCOM |
| Pin 57 | PD07 — GPIO/SERCOM |
| Pin 58 | PD08 — GPIO/SERCOM |
| Pin 59 | PD09 — GPIO/SERCOM |
| Pin 60 | VDDIO — Digital I/O supply voltage |
| Pin 61 | GND — Ground |
| Pin 62 | VDD — Core supply voltage |
| Pin 63 | RESETN — Reset input, active low |
| Pin 64 | EP — Exposed thermal pad (must be soldered to GND plane) |
Typical Applications
ATSAMD51J19A-MUT is suitable for 6 applications: Industrial Sensor Hubs and PLC Modules, USB Audio Interfaces and Instruments, Motor Control and BLDC/FOC Drives, IoT Edge Nodes and Smart Home Gateways, Human-Machine Interface (HMI) and Touch Panels, Portable Data Loggers and Test Instruments.
Industrial Sensor Hubs and PLC Modules
The ATSAMD51J19A-MUT's Cortex-M4F at 120 MHz with hardware FPU and DSP extensions, combined with 512 KB Flash and 192 KB SRAM, makes it ideal for industrial sensor hubs and PLC modules. The integrated 12-bit 1 MSPS ADC handles multiple analog sensor channels (temperature, pressure, strain) while the SERCOM peripherals connect to I2C sensors, SPI ADCs, and UART RS-485 transceivers. The dual-panel Flash with ECC enables live firmware updates in industrial automation systems where downtime is unacceptable. The industrial temperature range (-40C to +85C) and CAN-FD support suit factory-floor communication buses. Compared to a Cortex-M0+ MCU like the ATSAMD21J18A, the SAM D51's DSP extensions deliver 4-3x faster signal processing for sensor-fusion algorithms such as FFT-based vibration analysis.
Recommended
USB Audio Interfaces and Instruments
The ATSAMD51J19A-MUT integrates both USB 2.0 Full-Speed and Hi-Speed device/host controllers with on-chip transceivers, eliminating the need for an external USB PHY. The I2S interface supports multi-channel digital audio at standard sample rates up to 192 kHz, while the Cortex-M4F DSP extensions provide real-time effects processing (EQ, dynamics, reverb). The 192 KB SRAM allows ample buffering for USB Hi-Speed isochronous audio streams at 24-bit/96 kHz without dropouts. This combination makes the ATSAMD51J19A-MUT ideal for USB audio interfaces, MIDI controllers, and laboratory instruments that stream high-resolution data over USB. Compared to using a separate USB audio bridge IC, this single-chip solution reduces BOM cost by 30-40% and PCB area by half.
Recommended
Motor Control and BLDC/FOC Drives
The ATSAMD51J19A-MUT's Cortex-M4F core with single-cycle MAC and FPU is well-suited for Field-Oriented Control (FOC) and sensorless BLDC motor control algorithms. The integrated PWM timers (TCC) and 12-bit 1 MSPS ADC enable precise commutation at high RPMs, while the Cortex-M4F DSP instructions execute Park and Clarke transforms in single cycles. The 192 KB SRAM holds the entire FOC state machine and observer (e.g., sliding-mode or Luenberger) without external memory. The CAN-FD controller and industrial temperature range make it suitable for industrial servo drives and robotics. Per the SAM D5X/E5X family datasheet, the PWM-to-ADC synchronization hardware is established for deterministic control loop timing.
Recommended
IoT Edge Nodes and Smart Home Gateways
The ATSAMD51J19A-MUT's 120 MHz Cortex-M4F with FPU and DSP can run edge machine-learning inference engines (e.g., TensorFlow Lite for Microcontrollers) for local anomaly detection, voice keyword spotting, and sensor fusion. The SERCOM peripherals connect to I2C sensors, SPI radios, and UART debug consoles; the integrated I2S interface can capture PDM microphone streams for voice processing. The 512 KB Flash stores ML model weights and application firmware, while 192 KB SRAM holds activations and audio buffers. Per Microchip's SAM D5X/E5X family datasheet, the low-power sleep controller and 32 kHz RTC enable battery-friendly duty-cycling for smart-home battery-powered nodes.
Recommended
Human-Machine Interface (HMI) and Touch Panels
The ATSAMD51J19A-MUT's 120 MHz core and 192 KB SRAM can drive a small TFT LCD through the integrated SERCOM (SPI) and parallel port (PORT) interfaces while simultaneously scanning a capacitive touch controller. The Cortex-M4F DSP extensions accelerate graphics operations such as image scaling, alpha blending, and font rasterization for responsive HMIs. The dual-panel Flash with ECC allows field firmware upgrades without shutting down the HMI, essential for industrial panel-meter and medical-device applications. The integrated 12-bit DAC can drive an analog contrast voltage or audio cue. Per the SAM D5X/E5X family datasheet, the 64-pin VQFN package provides enough I/O for both display and touch interfaces.
Recommended
Portable Data Loggers and Test Instruments
The ATSAMD51J19A-MUT's 12-bit 1 MSPS ADC and 192 KB SRAM support portable data loggers that sample multiple analog channels and store bursts to Flash or stream over USB Hi-Speed. The Cortex-M4F DSP instructions accelerate FFT and statistical analysis on captured waveforms, allowing portable oscilloscopes, power-quality analyzers, and environmental monitors to display real-time spectrum views. The CAN-FD interface captures automotive or industrial bus traffic, while the I2S interface records audio or vibration data. Per the SAM D5X/E5X family datasheet, the 120 MHz clock and the dual-panel Flash enable long-duration, in-situ firmware updates for field-deployed instruments.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51J19A-MUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51J19A-MU | ATSAMD51J19A-AUT | ATSAMD51J19A-MF | ATSAMD51J18A-MU |
|---|---|---|---|---|---|
| Package | VQFN-64 (9x9 mm) | VQFN-64 (9x9 mm) - same | VQFN-64 (9x9 mm) - same | VQFN-64 (9x9 mm) - same | VQFN-64 (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Maximum CPU Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB | 256 KB |
| SRAM | 192 KB | 192 KB | 192 KB | 192 KB | 128 KB |
| USB | Full-Speed + Hi-Speed | Full-Speed + Hi-Speed | Full-Speed + Hi-Speed | Full-Speed + Hi-Speed | Full-Speed + Hi-Speed |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Unit Price (qty 1000) | $5.02 | $5.02 (typical) | $5.50 (typical, automotive grade) | $5.02 (typical) | $4.40 (typical, lower Flash) |
Key Differentiators
- Largest Flash and SRAM in SAM D51 VQFN-64 family (vs ATSAMD51J18A-MU)
- Hi-Speed USB with on-chip PHY (vs ATSAMD51G19A-MFT)
- Cortex-M4F vs Cortex-M0+ in entry-level SAM family (vs ATSAMD21J18A-MFT)
Design Notes
The 64-pin VQFN package has an exposed thermal pad (EP, pin 64) that MUST be soldered to a continuous ground plane with a 5x5 thermal via array (0.3 mm vias, 1.0 mm pitch) for proper heat dissipation and electrical grounding. Inadequate EP soldering is the leading cause of SAM D51 EMC failures and thermal shutdown events. Estimate: at 120 MHz and full peripheral activity, the MCU dissipates approximately 250-400 mW; the VQFN-64 has a theta_JA of approximately 28 C/W on a 4-layer JEDEC test board.
Place 100 nF decoupling capacitors within 2 mm of every VDD and VDDIO pin, plus a 4.7 uF bulk capacitor at the supply entry point. The SAM D51 has multiple VDD and VDDIO pins distributed around the package; failure to decouple each pin can cause core-voltage ripple that triggers brown-out resets. Per the SAM D5X/E5X family datasheet, the VDDIO can be powered at 1.8V, 3.3V, or 5V while VDD must stay at 1.2V (or use the integrated LDO).
Do not skip the NVMCTRL calibration lockbits setup - the SAM D51's dual-panel Flash requires specific software sequences to enable read-while-write. Failing to configure the lockbits correctly can result in NVM errors during live firmware updates. Additionally, the SERCOM peripheral pin-muxing must be configured BEFORE enabling the peripheral clock; enabling the clock first results in the SERCOM getting stuck in an undefined state requiring a reset.
The USB Hi-Speed DP/DM lines require 90 ohm differential impedance routing with no stubs and minimal layer transitions. Add a common-mode choke (e.g., WE-CNSL series) and an ESD protection array (e.g., USBLC6-2SC6) at the USB connector. The CAN-FD bus lines need 120 ohm termination resistors at each end of the bus segment and a common-mode choke for industrial environments with high EMI.
Compliance Information
RoHS and REACH compliant per Microchip product page. Standard ATSAMD51J19A-MUT is industrial temperature grade - choose ATSAMD51J19A-AUT variant for AEC-Q100 qualified automotive applications. Halogen-free per Microchip environmental compliance documentation.
