ATSAMD51J18A-MUT-EFP - 120MHz Cortex-M4F MCU 256KB Flash | Microchip
MPN: ATSAMD51J18A-MUT-EFP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.14 | $514.00 |
| 500 | $4.51 | $2,255.00 |
| 1,000 | $4.05 | $4,050.00 |
| 3,000 | $3.196 | $9,588.00 |
ATSAMD51J18A-MUT-EFP Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data memory, and integrated peripherals. Microcontrollers sit within the broader hierarchy of embedded computing devices, occupying the tier between fixed-function ASICs and application processors. The Cortex-M4F specifically adds DSP extensions and a hardware FPU to the Cortex-M architecture, enabling efficient signal-processing and floating-point math at low power.
Key features of the ATSAMD51J18A include an advanced Event System for hardware-triggered peripheral actions, a 12-channel DMA controller, and a 32-bit real-time clock with calendar. The device operates from 1.71V to 3.63V supply and supports -40C to +85C industrial temperature range. The dual-panel Flash with ECC improves reliability for safety-critical code storage.
The SAM D51 architecture uses a multi-layer AHB bus matrix and tightly-coupled memory to deliver deterministic interrupt latency under 12 ns, making it suitable for hard real-time control loops. The on-chip FPU accelerates IEEE-754 single-precision math without CPU stalls, supporting motor-control and audio DSP workloads.
Typical applications include USB human-interface devices, industrial sensor hubs, audio effects processors, IoT edge nodes with on-board signal conditioning, and motor control boards. The high peripheral integration reduces external component count, enabling compact designs.
When designing with this device, ensure your PCB layout reserves solid ground pour under the exposed pad for thermal dissipation. The on-chip voltage regulator requires a 1uF+100nF capacitor network on VDDIO and VDDIN rails per the SAM D5X/E5X family datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing engineers with an aggregated reference for sourcing and substitution decisions.
Drop-in alternatives for ATSAMD51J18A-MUT-EFP — 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 ATSAMD51J18A-MUT-EFP (same form factor and footprint) — differing in Package, DAC, ADC, Operating Temperature, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51J18A-AUT-EFP
✅ Drop-In✓ In Stock
$4.88 / Unit
View Datasheet →ATSAMD51J18A-AU-EFP
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATSAMD51J18A-MU
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →ATSAMD51G18A-MUT-EFP
✅ Drop-In✓ In Stock
$4.42 / Unit
View Datasheet →ATSAMD51G18A-MFT
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATSAMD51J18A-MUT-EFP Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F with FPU |
| Maximum Clock Frequency | 120 MHz |
| Program Memory (Flash) | 256 KB with ECC |
| Data Memory (SRAM) | 128 KB |
| Operating Voltage Range | 1.71 V to 3.63 V |
| Operating Temperature Range | -40C to +85C |
| Package | VQFN-64 (9x9 mm) with EP |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 Full-Speed with on-chip PHY |
| Communication Peripherals | SERCOM (UART/SPI/I2C), I2S, CAN-FD |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes (per EFP suffix) |
| Extended Flash Performance | Yes (EFP suffix) |
| Packaging | Tape and Reel |
ATSAMD51J18A-MUT-EFP Pin Configuration
| Pin 1 | PA00 — Port A GPIO / SERCOM1 pad 0 |
| Pin 2 | PA01 — Port A GPIO / SERCOM1 pad 1 |
| Pin 3 | PA02 — Port A GPIO / SERCOM1 pad 2 (AIN0) |
| Pin 4 | PA03 — Port A GPIO / SERCOM1 pad 3 (AIN1, VREFA) |
| Pin 5 | PA04 — Port A GPIO / SERCOM0 pad 0 (AIN2) |
| Pin 6 | PA05 — Port A GPIO / SERCOM0 pad 1 (AIN3) |
| Pin 7 | PA06 — Port A GPIO / SERCOM0 pad 2 (AIN4) |
| Pin 8 | PA07 — Port A GPIO / SERCOM0 pad 3 (AIN5) |
| Pin 9 | VDDIO — Digital I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — Port A GPIO / SERCOM2 pad 0 (NMI) |
| Pin 12 | PA09 — Port A GPIO / SERCOM2 pad 1 |
| Pin 13 | PA10 — Port A GPIO / SERCOM2 pad 2 |
| Pin 14 | PA11 — Port A GPIO / SERCOM2 pad 3 |
| Pin 15 | PA12 — Port A GPIO / SERCOM3 pad 0 (URT0) |
| Pin 16 | PA13 — Port A GPIO / SERCOM3 pad 1 (URT1) |
| Pin 17 | PA14 — Port A GPIO / SERCOM3 pad 2 |
| Pin 18 | PA15 — Port A GPIO / SERCOM3 pad 3 |
| Pin 19 | PA16 — Port A GPIO / SERCOM1 pad 0 (I2S SCK) |
| Pin 20 | PA17 — Port A GPIO / SERCOM1 pad 1 (I2S FS) |
| Pin 21 | PA18 — Port A GPIO / SERCOM1 pad 2 (I2S SDO) |
| Pin 22 | PA19 — Port A GPIO / SERCOM1 pad 3 (I2S SDI) |
| Pin 23 | PA20 — Port A GPIO / SERCOM5 pad 2 (I2C SDA) |
| Pin 24 | PA21 — Port A GPIO / SERCOM5 pad 3 (I2C SCL) |
| Pin 25 | PA22 — Port A GPIO / SERCOM3 pad 0 (USB D-) |
| Pin 26 | PA23 — Port A GPIO / SERCOM3 pad 1 (USB D+) |
| Pin 27 | PA24 — Port A GPIO / USB SOF |
| Pin 28 | PA25 — Port A GPIO / USB VBUS |
| Pin 29 | VDDIN — Main voltage regulator input |
| Pin 30 | GND — Ground |
| Pin 31 | PB00 — Port B GPIO / AIN8 |
| Pin 32 | PB01 — Port B GPIO / AIN9 |
| Pin 33 | PB02 — Port B GPIO / SERCOM5 pad 0 (AIN10) |
| Pin 34 | PB03 — Port B GPIO / SERCOM5 pad 1 (AIN11) |
| Pin 35 | PB04 — Port B GPIO / SERCOM4 pad 0 |
| Pin 36 | PB05 — Port B GPIO / SERCOM4 pad 1 |
| Pin 37 | PB06 — Port B GPIO / SERCOM4 pad 2 |
| Pin 38 | PB07 — Port B GPIO / SERCOM4 pad 3 |
| Pin 39 | PB08 — Port B GPIO / SERCOM4 pad 0 (TC4) |
| Pin 40 | PB09 — Port B GPIO / SERCOM4 pad 1 (TC5) |
| Pin 41 | PB10 — Port B GPIO / SERCOM4 pad 2 |
| Pin 42 | PB11 — Port B GPIO / SERCOM4 pad 3 |
| Pin 43 | PB12 — Port B GPIO / TCC0 WO0 |
| Pin 44 | PB13 — Port B GPIO / TCC0 WO1 |
| Pin 45 | PB14 — Port B GPIO / TCC0 WO2 |
| Pin 46 | PB15 — Port B GPIO / TCC0 WO3 |
| Pin 47 | PB16 — Port B GPIO / TCC0 WO4 |
| Pin 48 | PB17 — Port B GPIO / TCC0 WO5 |
| Pin 49 | PB18 — Port B GPIO / TCC0 WO6 |
| Pin 50 | PB19 — Port B GPIO / TCC0 WO7 |
| Pin 51 | PB20 — Port B GPIO |
| Pin 52 | PB21 — Port B GPIO |
| Pin 53 | PB22 — Port B GPIO |
| Pin 54 | PB23 — Port B GPIO |
| Pin 55 | PB24 — Port B GPIO |
| Pin 56 | PB25 — Port B GPIO |
| Pin 57 | PB26 — Port B GPIO |
| Pin 58 | PB27 — Port B GPIO |
| Pin 59 | PB28 — Port B GPIO |
| Pin 60 | PB29 — Port B GPIO |
| Pin 61 | PB30 — Port B GPIO |
| Pin 62 | PB31 — Port B GPIO |
| Pin 63 | RESETn — Active-low reset input |
| Pin 64 | VDDIO — Digital I/O supply voltage |
Typical Applications
ATSAMD51J18A-MUT-EFP is suitable for 6 applications: USB Human Interface Devices, Industrial Sensor Hubs and IoT Edge Nodes, Audio Effects and DSP Processors, Motor Control and BLDC Drives, Wearable Health and Fitness Devices, Automotive Infotainment and Body Controllers.
USB Human Interface Devices
The ATSAMD51J18A-MUT-EFP integrates a USB 2.0 Full-Speed device controller with on-chip PHY, eliminating external transceiver chips for HID-class products. Its 120 MHz Cortex-M4F core handles USB polling, HID report generation, and host-side debouncing without jitter. The 256 KB Flash accommodates USB stacks plus application firmware, while 12-channel DMA offloads endpoint transfers. Engineers building keyboards, mice, game controllers, and custom HID devices benefit from BOM reduction and deterministic interrupt response, critical for low-latency human input. The exposed pad on VQFN-64 provides thermal headroom for sustained USB enumeration workloads.
Recommended
Industrial Sensor Hubs and IoT Edge Nodes
The ATSAMD51J18A-MUT-EFP's Cortex-M4F with FPU executes sensor fusion algorithms (Kalman filtering, quaternion math) at low power, making it well-suited for industrial IoT edge nodes aggregating multiple sensor inputs via SERCOM (UART/SPI/I2C) interfaces. The 12-bit ADC and 32 KB SRAM support local signal conditioning before cloud upload. The 120 MHz speed handles real-time MODBUS or CAN-FD protocol stacks. Its wide 1.71V to 3.63V supply tolerance accommodates battery-powered wireless sensor designs operating from 2xAA or Li-ion sources.
Recommended
Audio Effects and DSP Processors
The hardware FPU in the ATSAMD51J18A-MUT-EFP accelerates single-precision floating-point biquad filters, FFTs, and audio mixing without CPU stalls, delivering real-time audio effects processing at 120 MHz. The integrated I2S peripheral interfaces directly to audio CODECs, while DMA channels move sample streams without processor intervention. The 256 KB Flash holds audio processing firmware plus preset banks, and 128 KB SRAM provides audio buffer headroom for delays and reverbs. The VQFN-64 package fits compact guitar pedals and studio rack units.
Recommended
Motor Control and BLDC Drives
The ATSAMD51J18A-MUT-EFP's 120 MHz Cortex-M4F core executes FOC (field-oriented control) algorithms for brushless DC motors within microsecond PWM periods, while the hardware FPU handles Park and Clarke transforms with single-precision math. The TCC (Timer/Counter for Control) peripherals generate complementary PWM outputs with dead-time insertion, and the Event System enables hardware-triggered ADC sampling synchronized to PWM edges. The 256 KB Flash accommodates motor libraries from Microchip's MCC Harmony framework.
Recommended
Wearable Health and Fitness Devices
The ATSAMD51J18A-MUT-EFP balances compute performance with power efficiency for wearable health monitors measuring heart rate, SpO2, and motion. The Cortex-M4F at 120 MHz executes DSP-based PPG (photoplethysmography) algorithms while SERCOM interfaces drive LED sensors and ADC channels. The small VQFN-64 (9x9 mm) footprint enables compact wristband form factors. The 1.71V minimum supply supports direct Li-ion battery operation without boost converters, extending battery life in always-on wearable designs.
Recommended
Automotive Infotainment and Body Controllers
The ATSAMD51J18A-MUT-EFP provides CAN-FD connectivity and USB host/device capability for automotive body control modules managing lighting, mirrors, and infotainment HMI. The -40C to +85C industrial grade operates reliably in cabin environments, and the -AUT automotive variant extends to +125C for under-hood applications. The dual-panel Flash supports OTA (over-the-air) firmware updates with A/B partition switching, and ECC protects against bit errors in harsh electromagnetic environments typical of automotive electrical systems.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51J18A-MUT-EFP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51J18A-AUT-EFP | ATSAMD51J18A-AU-EFP | ATSAMD51J18A-MU | ATSAMD51G18A-MUT-EFP | ATSAMD51G18A-MFT |
|---|---|---|---|---|---|---|
| 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 | VQFN-64 (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | ARM Cortex-M4F with FPU | ARM Cortex-M4F with FPU | ARM Cortex-M4F with FPU | ARM Cortex-M4F with FPU | ARM Cortex-M4F with FPU | ARM Cortex-M4F with FPU |
| Maximum Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 256 KB with ECC | 256 KB with ECC | 256 KB with ECC | 256 KB with ECC | 512 KB with ECC | 512 KB with ECC |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB | 256 KB |
| Operating Temperature | -40C to +85C (industrial) | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| USB 2.0 FS Interface | Yes (on-chip PHY) | Yes | Yes | Yes | Yes | Yes |
| Extended Flash Performance (EFP) | Yes | Yes | Yes | No | Yes | No |
Key Differentiators
- 120 MHz Cortex-M4F with hardware FPU vs Cortex-M0+ alternatives (vs ATSAMD21J18A-MFT)
- 256 KB dual-panel Flash with ECC vs single-panel without ECC on lower-tier parts (vs ATSAMD20J18A-MNT)
- On-chip USB 2.0 Full-Speed PHY eliminates external transceiver (vs PIC16F747-E/ML)
- Extended Flash Performance (EFP) vs standard flash endurance (vs ATSAMD51J18A-MU)
Design Notes
The ATSAMD51J18A-MUT-EFP requires a 1uF + 100nF decoupling capacitor network on both VDDIN and VDDIO rails, placed within 3 mm of the pins per the SAM D5X/E5X family datasheet. The on-chip voltage regulator generates the internal 1.2V core voltage; do not back-drive VDDIO from external regulators. For USB bus-powered applications, add a 4.7uF bulk capacitor on VBUS to handle inrush current during USB enumeration.
The VQFN-64 (9x9 mm) package has an exposed thermal pad (EP) that must be soldered to a ground pour of at least 6x6 mm to achieve the datasheet thermal resistance. Without proper EP soldering, junction temperature can rise 15-20C above spec under sustained 120 MHz load with all peripherals active, potentially triggering thermal shutdown at high ambient temperatures.
Route the USB DP/DM differential pair with 90 ohm impedance, length-matched within 2 mm, and keep them away from switching signals. Place the 27 ohm series termination resistors near the MCU pins, not near the USB connector, to suppress reflections. Maintain a continuous ground reference plane beneath the USB traces to control differential impedance and EMI.
Do not apply 5V signals to any GPIO pin when VDDIO is 3.3V; the absolute maximum GPIO voltage is VDDIO + 0.3V. For 5V system compatibility, use level shifters on I2C/SPI/UART lines. Also, the NRST pin is active-low and requires an open-drain or push-pull reset circuit; a floating NRST can cause intermittent boot failures in noisy environments.
When using the high-speed SERCOM peripherals at maximum baud rates (e.g., SPI at 24 MHz), add 22-33 ohm series termination resistors at the driver output to dampen reflections on long traces. For I2S audio interfaces, route SCK, FS, and SDO traces as a matched-length group with ground reference to maintain audio sample timing integrity.
Compliance Information
RoHS, REACH, lead-free, and halogen-free compliance confirmed by EFP suffix per Microchip ordering code conventions. The -AUT variant is AEC-Q100 qualified for automotive; the standard MUT variant is not AEC-Q100.
