ATSAMD51J20A-MUT-EFP - 120MHz Cortex-M4F MCU 1MB Flash 64-VQFN | Microchip
MPN: ATSAMD51J20A-MUT-EFP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.52 | $8.52 |
| 10 | $7.67 | $76.70 |
| 100 | $6.81 | $681.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.43 | $5,430.00 |
ATSAMD51J20A-MUT-EFP Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable I/O peripherals. Within the embedded system hierarchy, an MCU sits below microprocessors (MPUs) in complexity but above simple state machines and ASICs. The Cortex-M4F specifically adds single-precision floating-point hardware and DSP extensions, enabling efficient sensor fusion, motor control, and audio processing without software emulation of floating-point math.
Key features of the ATSAMD51J20A-MUT-EFP include 120 MHz core clock, 1 MB Flash with Error Correction Code (ECC), 256 KB SRAM, a full-speed USB 2.0 interface with integrated PHY, and the SAM D51 peripheral set: SERCOM configurable serial interfaces, I2S, CAN-FD, and a 12-bit ADC with up to 16 channels. The EFP suffix denotes Extended Flash Performance variants optimized for sustained execution throughput from Flash, with USB support enabled.
Architecturally, the SAM D51 uses the Cortex-M4F core connected via a multi-layer AHB/APB bus matrix to independent SRAM and Flash banks. ECC on both memory blocks provides single-bit error correction and double-bit error detection, which is critical for safety-sensitive applications. The dual-panel Flash organization enables read-while-write operation, allowing firmware updates without halting code execution.
Typical applications include USB Human Interface Devices (HIDs), industrial sensor hubs, audio playback devices using I2S, motor control (FOC algorithms on BLDC and stepper motors), smart metering, and connected IoT edge nodes. The wide peripheral mix supports both wired (CAN, USB, UART) and wired-network connectivity through external transceivers.
When designing with this MCU, allocate sufficient decoupling capacitance near the VDD pins and ensure the trace length to the 32.768 kHz crystal is short to maintain RTC accuracy. Use Microchip's MPLAB Harmony 3 framework for peripheral configuration and FreeRTOS port for multitasking - both are validated against the SAM D51 silicon.
This page synthesizes distributor pricing for the EFP tape-and-reel variant, drop-in same-family alternates in the SAM D51 lineup, and practical design notes beyond what the manufacturer datasheet alone provides.
Drop-in alternatives for ATSAMD51J20A-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 ATSAMD51J20A-MUT-EFP (same form factor and footprint) — differing in Package, ADC, DAC, SRAM, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51J20A-MFT
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →ATSAMD51J20A-MF
✅ Drop-In✓ In Stock
$5.2 / Unit
View Datasheet →ATSAMD51J20A-AUT-EFP
✅ Drop-In✓ In Stock
$7.8 / Unit
View Datasheet →ATSAMD51J19A-MUT-EFP
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →ATSAMD51J18A-MUT-EFP
✅ Drop-In✓ In Stock
$3.196 / Unit
View Datasheet →ATSAMD51G19A-MFT
✅ Drop-In✓ In Stock
$4.02 / Unit
View Datasheet →ATSAMD51J20A-MUT-EFP Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with FPU |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 1 MB (dual-panel with ECC) |
| SRAM | 256 KB (with ECC) |
| Package | 64-VQFN (9x9 mm) with exposed pad |
| Supply Voltage | 1.71 V to 3.63 V |
| Operating Temperature | -40 C to +85 C (industrial) |
| USB Interface | USB 2.0 Full-Speed with integrated PHY |
| CAN-FD | Yes |
| ADC | 12-bit, up to 16 channels |
| DAC | 12-bit, 2 channels |
| SERCOM | 8 configurable serial interfaces (UART/SPI/I2C) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| ECC Support | Yes (Flash + SRAM) |
ATSAMD51J20A-MUT-EFP Pin Configuration
| Pin 1 | PA00 — General purpose I/O / SERCOM1 PAD0 |
| Pin 2 | PA01 — General purpose I/O / SERCOM1 PAD1 |
| Pin 3 | PA02 — Analog input ADC0 / positive AIN0 |
| Pin 4 | PA03 — Analog input ADC0 / positive AIN1 |
| Pin 5 | GND — Ground reference |
| Pin 6 | VDD — Core voltage supply 1.71-3.63 V |
| Pin 7 | PA04 — Analog input / VREF |
| Pin 8 | PA05 — Analog input / DAC VOUT |
| Pin 9 | PA06 — General purpose I/O |
| Pin 10 | PA07 — General purpose I/O |
| Pin 11 | PA08 — I2S MCK / SERCOM |
| Pin 12 | PA09 — I2S FS / SERCOM |
| Pin 13 | PA10 — I2S SCK / SERCOM |
| Pin 14 | PA11 — I2S SDO / SERCOM |
| Pin 15 | VDD — I/O voltage supply |
| Pin 16 | GND — Ground reference |
| Pin 17 | PB10 — USB D- (full-speed PHY) |
| Pin 18 | PB11 — USB D+ (full-speed PHY) |
| Pin 19 | PB12 — CAN-FD TX / SERCOM |
| Pin 20 | PB13 — CAN-FD RX / SERCOM |
| Pin 21 | PB14 — General purpose I/O |
| Pin 22 | PB15 — General purpose I/O |
| Pin 23 | PC00 — SERCOM / I2C |
| Pin 24 | PC01 — SERCOM / I2C |
| Pin 25 | PC02 — SERCOM / SPI |
| Pin 26 | PC03 — SERCOM / SPI |
| Pin 27 | PC04 — General purpose I/O |
| Pin 28 | PC05 — General purpose I/O |
| Pin 29 | PC06 — General purpose I/O |
| Pin 30 | PC07 — General purpose I/O |
| Pin 31 | PD00 — General purpose I/O |
| Pin 32 | PD01 — General purpose I/O |
| Pin 33 | PD02 — General purpose I/O |
| Pin 34 | PD03 — General purpose I/O |
| Pin 35 | PD04 — General purpose I/O |
| Pin 36 | PD05 — General purpose I/O |
| Pin 37 | PD06 — General purpose I/O |
| Pin 38 | PD07 — General purpose I/O |
| Pin 39 | PD08 — General purpose I/O |
| Pin 40 | PD09 — General purpose I/O |
| Pin 41 | PD10 — General purpose I/O |
| Pin 42 | PD11 — General purpose I/O |
| Pin 43 | PD12 — General purpose I/O |
| Pin 44 | PD13 — General purpose I/O |
| Pin 45 | PE00 — General purpose I/O |
| Pin 46 | PE01 — General purpose I/O |
| Pin 47 | PE02 — General purpose I/O |
| Pin 48 | PE03 — General purpose I/O |
| Pin 49 | PF00 — General purpose I/O |
| Pin 50 | PF01 — General purpose I/O |
| Pin 51 | PF02 — General purpose I/O |
| Pin 52 | PF03 — General purpose I/O |
| Pin 53 | PG00 — XIN32 - 32.768 kHz crystal in |
| Pin 54 | PG01 — XOUT32 - 32.768 kHz crystal out |
| Pin 55 | RESET — Active-low reset input |
| Pin 56 | SWDIO — ARM SWD data (debug) |
| Pin 57 | SWCLK — ARM SWD clock (debug) |
| Pin 58 | VDD — PLL voltage supply |
| Pin 59 | GND — Ground reference |
| Pin 60 | PH00 — General purpose I/O |
| Pin 61 | PH01 — General purpose I/O |
| Pin 62 | PH02 — General purpose I/O |
| Pin 63 | PH03 — General purpose I/O |
| Pin 64 | EP — Exposed thermal pad - must be soldered to ground for thermal dissipation |
Typical Applications
ATSAMD51J20A-MUT-EFP is suitable for 6 applications: USB Human Interface Device (HID), Industrial Sensor Hub, Audio Playback Device (I2S DAC), BLDC Motor Control (FOC Algorithm), Smart Energy Meter, IoT Edge Node with Wired Connectivity.
USB Human Interface Device (HID)
The ATSAMD51J20A-MUT-EFP integrates a full-speed USB 2.0 PHY and dedicated USB pins on the 64-VQFN package, making it well suited to HID products such as keyboards, mice, game controllers, and custom peripherals. The 120 MHz Cortex-M4F with FPU processes HID reports with sub-millisecond latency while leaving headroom for on-device macro scripting or RGB LED control. The EFP order code specifically designates the USB-enabled variant, and Microchip's MPLAB Harmony 3 USB stack provides validated HID, CDC, and composite class drivers. The 1 MB Flash supports large descriptor tables and multi-language layouts without external storage.
Recommended
Industrial Sensor Hub
The ATSAMD51J20A-MUT-EFP's combination of 8 SERCOM channels (each configurable as UART/SPI/I2C), 12-bit ADC with up to 16 channels, and 256 KB SRAM suits multi-sensor aggregation nodes. Its dual-panel Flash with ECC and industrial -40 to +85 C rating meet factory-floor requirements. The CAN-FD controller enables peer-to-peer communication with industrial actuators, while the high CPU throughput allows on-board filtering, FFT analysis, or Modbus gateway functions in real time. ECC on SRAM protects against soft errors caused by cosmic radiation or EMI in harsh environments.
Recommended
Audio Playback Device (I2S DAC)
The ATSAMD51J20A-MUT-EFP's I2S interface and 12-bit DAC, paired with the Cortex-M4F's DSP extensions, support 16-bit/44.1 kHz audio playback from compressed formats stored in Flash. The 120 MHz core handles MP3 or AAC decoding with cycles to spare for equalizer and effects processing. Dual-panel Flash enables background updates to sound assets while audio plays continuously from the same memory. Low-jitter SERCOM configuration ensures clean I2S clocking, which directly impacts audio DAC THD+N performance in headphone amplifiers and portable speakers.
Recommended
BLDC Motor Control (FOC Algorithm)
The 120 MHz Cortex-M4F FPU executes sensorless Field-Oriented Control (FOC) for brushless DC motors with current-loop rates exceeding 20 kHz while simultaneously servicing CAN-FD comms, PWM generation, and ADC sampling. The 256 KB SRAM holds FOC state structures and observer history without external memory. Hardware Q15 math via SIMD instructions reduces MIPS compared to Cortex-M0+ parts. The industrial temperature rating suits outdoor e-mobility and appliance pump/fan applications where firmware updates via dual-panel Flash keep deployed units current.
Recommended
Smart Energy Meter
The ATSAMD51J20A-MUT-EFP's 12-bit ADC and CAN-FD bus enable residential or commercial metering nodes that measure voltage and current waveforms, compute RMS and harmonic content, and report via CAN to a concentrator. ECC on Flash and SRAM guards against silent corruption in unattended installations over 10+ year service lifetimes. The RTC with 32.768 kHz crystal supports time-of-use billing tariffs, and the dual-panel Flash enables OTA firmware updates without disconnecting the meter from the load.
Recommended
IoT Edge Node with Wired Connectivity
The ATSAMD51J20A-MUT-EFP's mix of USB, CAN-FD, UART, SPI, and I2C gives wired connectivity options for IoT edge gateways, industrial controllers, and building-automation nodes. The Cortex-M4F FPU runs TinyML inference (e.g., anomaly detection or keyword spotting) directly from Flash using CMSIS-NN kernels. With 1 MB Flash, models up to ~400 KB fit alongside the application. MPLAB Harmony 3 middleware provides TCP/IP and MQTT clients for wired Ethernet via external SPI-to-Ethernet bridges, while ECC memory protects against bit-flips in deployed field installations.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51J20A-MUT-EFP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51J20A-MFT | ATSAMD51J20A-MF | ATSAMD51J20A-AUT-EFP | ATSAMD51J19A-MUT-EFP | ATSAMD51G19A-MFT |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 512 KB (-50%) | 512 KB (-50%) |
| SRAM | 256 KB | 256 KB | 256 KB | 256 KB | 192 KB (-25%) | 192 KB (-25%) |
| AEC-Q100 Qualified | No (industrial -40 to +85 C) | No | No | Yes (AEC-Q100) | No | No |
| USB 2.0 PHY | Yes (EFP variant) | Yes | Yes | Yes | Yes (EFP) | Yes |
| Packaging Format | Tape & Reel, 3000-unit reel | Tape & Reel, 1000-unit reel | Tray | Tape & Reel, 3000-unit reel | Tape & Reel, 3000-unit reel | Tape & Reel, 1000-unit reel |
Key Differentiators
- Dual-panel Flash with ECC for read-while-write firmware updates (vs ATSAMD21J18A-MFT (single-bank Flash, no ECC))
- Integrated USB 2.0 Full-Speed PHY on-chip (vs External USB PHY solutions on competitor MCUs)
- Cortex-M4F with hardware FPU and DSP extensions (vs Cortex-M0+ based MCUs in same price tier)
Design Notes
Decouple each VDD pin pair with a 100 nF ceramic capacitor placed within 2 mm of the pin, plus a bulk 4.7 uF on the main VDD rail. The PLL voltage pin (VDDPLL) requires its own low-pass filter (ferrite bead plus 1 uF + 10 nF) to suppress reference noise that would otherwise modulate the 120 MHz CPU clock. USB PHY supply (VDDUSB) needs a 1 uF + 100 nF pair to meet USB 2.0 full-speed signal-integrity masks.
The 64-VQFN exposed pad must be soldered to a ground plane of at least 25x25 mm copper for adequate heat dissipation at 120 MHz with USB enabled. Without thermal vias to inner ground layers, junction temperature can rise 30-40 C above ambient under worst-case continuous workload, derating CPU frequency via the on-chip thermal sensor. Stencil aperture for the EP should be a 5x5 array of 0.4 mm circles to ensure >70% solder paste coverage.
Route the USB D+/D- traces as a 90 ohm differential pair with length matching within 150 mil, and keep them away from switching nodes like PWM outputs or the 32.768 kHz crystal traces. The XIN32/XOUT32 32.768 kHz crystal must be within 5 mm of its pins with a guard ring tied to ground; long traces degrade RTC accuracy below 50 ppm.
Do not exceed 3.63 V on any VDD pin - the SAM D51 is NOT 5V tolerant. Configure unused I/O pins as outputs driven low (not inputs) to minimize current draw from floating-pin protection diodes. The EFP order code enables USB; using a non-EFP variant (e.g., ATSAMD51J20A-MUT) without proper USB configuration can lock the USB PHY in an undefined state at boot.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature range -40 to +85 C. For AEC-Q100 automotive applications, select ATSAMD51J20A-AUT-EFP variant instead.
