ATSAMD51J19A-AUT-EFP - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
MPN: ATSAMD51J19A-AUT-EFP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.84 | $7.84 |
| 10 | $7.04 | $70.40 |
| 100 | $5.95 | $595.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.45 | $4,450.00 |
ATSAMD51J19A-AUT-EFP Overview
A microcontroller (MCU) is a single-chip processor that integrates a CPU core, program memory (Flash), data memory (SRAM), and programmable peripherals into one package. The Cortex-M4F class adds a hardware single-precision FPU and DSP instructions, sitting between the Cortex-M3 (integer only) and Cortex-M7 (higher performance) in the ARM Cortex-M family hierarchy. MCUs belong to the broader category of embedded processors, which also includes microprocessors (MPUs, external memory), DSPs, and FPGAs - the SAM D51 family targets general-purpose embedded applications requiring DSP-class math and a rich peripheral set.
Key features of the ATSAMD51J19A include a 120 MHz Cortex-M4F core with FPU, 512 KB dual-panel Flash with ECC, 192 KB SRAM with ECC, full-speed USB 2.0 device/host with on-chip transceiver, up to 51 programmable I/O pins, 1.71 V to 3.6 V supply, and a peripheral set including SERCOM, I2S, and a 12-bit ADC. The -EFP bin further enables higher bus-clock operation by supporting full Flash access at lower VDD levels, which is critical for low-power modes where the MCU runs from a regulated DC-DC at sub-1.8 V.
Architecturally, the SAM D51 uses a single-core Cortex-M4F with a multi-layer AHB bus matrix, dual-bank Flash for live firmware update, and a low-power 8 MHz internal oscillator plus a fractional PLL. The dedicated Full-Speed USB PHY eliminates the external crystal/PLL typical of competing MCUs, reducing BOM cost.
Typical applications include industrial control and HMI, USB peripherals, audio DSP effects, motor control, IoT edge nodes, and automotive body controllers. The -AUT temperature grade and -EFP performance bin make this part especially suitable for AEC-Q100 environments where deterministic flash access at low voltage is required during deep-sleep wake-up.
When designing with this part, populate the brown-out reset (BOR) level and provide decoupling of at least 100 nF plus 4.7 uF bulk per VDD pin pair. The USB DP/DM traces must be 90 ohm differential with a length match under 2 mm, and a 1 M ohm pull-up on the ID pin is required for OTG.
This page synthesizes distributor pricing, verified drop-in alternatives drawn from Microchip's own SAM D51 family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAMD51J19A-AUT-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 ATSAMD51J19A-AUT-EFP (same form factor and footprint) — differing in SRAM, DAC, ADC, Package, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51J19A-AFT
✅ Drop-In✓ In Stock
$4.8 / Unit
View Datasheet →ATSAMD51J18A-AUT
✅ Drop-In✓ In Stock
$4.78 / Unit
View Datasheet →ATSAMD51J19A-AU-EFP
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD51J18A-AU-EFP
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATSAMD51G19A-MFT
✅ Drop-In✓ In Stock
$4.02 / Unit
View Datasheet →ATSAMD51G18A-MFT
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATSAMD51J19A-AUT-EFP Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with single-precision FPU |
| Maximum Clock Speed | 120 MHz |
| Flash Memory | 512 KB (dual-panel with ECC) |
| SRAM | 192 KB with ECC |
| Operating Voltage | 1.71 V to 3.6 V |
| Supply Voltage Min | 1.71 V |
| Supply Voltage Max | 3.6 V |
| Package | 64-TQFP (10x10 mm) |
| Programmable I/O Pins | 51 |
| USB | USB 2.0 Full-Speed device/host with on-chip transceiver |
| ADC | 12-bit ADC |
| Operating Temperature Grade | Automotive (-40C to +125C) |
| Flash Performance | Extended Flash Performance (EFP bin) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ATSAMD51J19A-AUT-EFP Pin Configuration
| Pin 1 | PA00 — GPIO / XIN32 (external 32 kHz crystal input) |
| Pin 2 | PA01 — GPIO / XOUT32 (external 32 kHz crystal output) |
| Pin 3 | PA02 — GPIO / AIN0 (ADC analog input) |
| Pin 4 | PA03 — GPIO / AIN1 (ADC analog input) |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Core/IO supply (1.71 V to 3.6 V) |
| Pin 7 | VBUS — USB VBUS detect (5 V tolerant input) |
| Pin 8 | DM — USB D- data line |
| Pin 9 | DP — USB D+ data line |
| Pin 10 | GND — Ground |
| Pin 11 | PA04 — GPIO / AIN2 |
| Pin 12 | PA05 — GPIO / AIN3 |
| Pin 13 | PA06 — GPIO / AIN4 |
| Pin 14 | PA07 — GPIO / AIN5 |
| Pin 15 | PA08 — GPIO / SERCOM0 PAD0 |
| Pin 16 | PA09 — GPIO / SERCOM0 PAD1 |
| Pin 17 | PA10 — GPIO / SERCOM0 PAD2 |
| Pin 18 | PA11 — GPIO / SERCOM0 PAD3 |
| Pin 19 | VDD — Core/IO supply |
| Pin 20 | GND — Ground |
| Pin 21 | PA12 — GPIO / SERCOM1 PAD0 |
| Pin 22 | PA13 — GPIO / SERCOM1 PAD1 |
| Pin 23 | PA14 — GPIO / SERCOM1 PAD2 |
| Pin 24 | PA15 — GPIO / SERCOM1 PAD3 |
| Pin 25 | PA16 — GPIO / SERCOM2 PAD0 / I2S MCK |
| Pin 26 | PA17 — GPIO / SERCOM2 PAD1 / I2S FS |
| Pin 27 | PA18 — GPIO / SERCOM2 PAD2 / I2S SCK |
| Pin 28 | PA19 — GPIO / SERCOM2 PAD3 / I2S SDO |
| Pin 29 | PA20 — GPIO / SERCOM3 PAD0 |
| Pin 30 | PA21 — GPIO / SERCOM3 PAD1 |
| Pin 31 | PA22 — GPIO / SERCOM3 PAD2 |
| Pin 32 | PA23 — GPIO / SERCOM3 PAD3 |
| Pin 33 | GND — Ground |
| Pin 34 | VDD — Core/IO supply |
| Pin 35 | PA24 — GPIO / SERCOM4 PAD0 |
| Pin 36 | PA25 — GPIO / SERCOM4 PAD1 |
| Pin 37 | PA26 — GPIO / SERCOM4 PAD2 |
| Pin 38 | PA27 — GPIO / SERCOM4 PAD3 |
| Pin 39 | PA28 — GPIO / SERCOM5 PAD0 |
| Pin 40 | PA29 — GPIO / SERCOM5 PAD1 |
| Pin 41 | PA30 — GPIO / SERCOM5 PAD2 / SWCLK (debug) |
| Pin 42 | PA31 — GPIO / SERCOM5 PAD3 / SWDIO (debug) |
| Pin 43 | PB00 — GPIO / SERCOM6 PAD0 |
| Pin 44 | PB01 — GPIO / SERCOM6 PAD1 |
| Pin 45 | PB02 — GPIO / SERCOM6 PAD2 |
| Pin 46 | PB03 — GPIO / SERCOM6 PAD3 |
| Pin 47 | GND — Ground |
| Pin 48 | VDD — Core/IO supply |
| Pin 49 | PB04 — GPIO / SERCOM7 PAD0 |
| Pin 50 | PB05 — GPIO / SERCOM7 PAD1 |
| Pin 51 | PB06 — GPIO / SERCOM7 PAD2 |
| Pin 52 | PB07 — GPIO / SERCOM7 PAD3 |
| Pin 53 | PB08 — GPIO / SERCOM8 PAD0 / ADC AIN8 |
| Pin 54 | PB09 — GPIO / SERCOM8 PAD1 / ADC AIN9 |
| Pin 55 | PB10 — GPIO / SERCOM8 PAD2 / ADC AIN10 |
| Pin 56 | PB11 — GPIO / SERCOM8 PAD3 / ADC AIN11 |
| Pin 57 | PB12 — GPIO / SERCOM9 PAD0 |
| Pin 58 | PB13 — GPIO / SERCOM9 PAD1 |
| Pin 59 | PB14 — GPIO / SERCOM9 PAD2 |
| Pin 60 | PB15 — GPIO / SERCOM9 PAD3 |
| Pin 61 | RESET — Active-low reset input |
| Pin 62 | GND — Ground |
| Pin 63 | VDD — Core/IO supply |
| Pin 64 | VDDIO — IO reference supply (1.71 V to 3.6 V) |
Typical Applications
ATSAMD51J19A-AUT-EFP is suitable for 6 applications: Industrial HMI and Touch Panels, USB Audio Interfaces and DSP Effects Pedals, Automotive Body and Cabin Controllers, IoT Edge Sensor Hubs, Brushless DC Motor Control (FOC), Portable Data Acquisition and Test Instruments.
Industrial HMI and Touch Panels
The ATSAMD51J19A-AUT-EFP fits industrial HMI panels because its 120 MHz Cortex-M4F core drives TFT LCDs and capacitive touch without an external MPU. The 192 KB SRAM holds full-frame buffers for 320x240 RGB565 panels, while the integrated USB 2.0 Full-Speed transceiver simplifies connection to host PCs for configuration. The -AUT temperature grade tolerates factory cabinets running at 85C ambient, and the -EFP bin keeps flash read-while-write at low bus voltages - critical when the touch panel's DC-DC drops below 1.8 V in standby. Engineers pair this MCU with a FT813 graphics controller over SPI, using SERCOM for display updates.
Recommended
USB Audio Interfaces and DSP Effects Pedals
The ATSAMD51J19A-AUT-EFP's Cortex-M4F FPU executes single-precision audio DSP (biquads, FFTs, reverb) in real time at 120 MHz, while the integrated USB Full-Speed transceiver provides class-compliant USB Audio streaming. The 192 KB SRAM accommodates 1024-tap FIR coefficients and double-buffered audio frames, and the dual-panel 512 KB Flash lets users ship firmware updates that double as preset banks. The -EFP bin matters here because USB audio peripherals often run at 1.8 V from a Li-ion battery; full-speed flash reads at low VDD prevent audio glitching when the bus clock is at 60 MHz. Reference designs pair the MCU with a CS4344 DAC over I2S.
Recommended
Automotive Body and Cabin Controllers
The -AUT temperature grade and AEC-Q100 qualification make the ATSAMD51J19A-AUT-EFP a fit for automotive body controllers, HVAC interfaces, and lighting modules that must operate from -40C to +125C. The 51 GPIO pins drive multiple LIN/CAN nodes via external transceivers, while SERCOM peripherals handle in-car networking. The Cortex-M4F DSP accelerates motor-control loops for HVAC damper servos and stepper drivers at sub-millisecond rates, and the 192 KB SRAM buffers diagnostic OBD-II frames. Automotive engineers commonly pair this part with the ATA6563 CAN transceiver.
Recommended
IoT Edge Sensor Hubs
The ATSAMD51J19A-AUT-EFP suits IoT edge hubs that aggregate sensor data from SPI/I2C peripherals and push it over USB or a sub-GHz radio. The Cortex-M4F executes on-device machine-learning inference (e.g. CMSIS-NN) at sub-100 ms latency, while the 192 KB SRAM holds feature buffers. The 1.71 V minimum supply lets the MCU run from a partially discharged Li-ion battery, and the -EFP bin sustains full Flash access at 1.8 V - critical during deep-sleep wake-ups where the DC-DC hasn't fully ramped. The integrated USB PHY provides a debug and firmware-update path without external components.
Recommended
Brushless DC Motor Control (FOC)
The ATSAMD51J19A-AUT-EFP runs sensorless field-oriented control (FOC) for brushless DC motors in drones, e-bikes, and small appliances. The Cortex-M4F single-cycle MAC executes the Park/Clarke transforms and PID loops at 20 kHz PWM, while the 192 KB SRAM holds the FOC state variables and observer coefficients. The 51 GPIO provide 3-phase PWM plus encoder/hall-sensor inputs, and the -AUT grade allows deployment in automotive and industrial environments up to 125C junction. The -EFP bin ensures deterministic ADC-to-PWM latency at low VDD, which is essential for high-RPM motor synchronization.
Recommended
Portable Data Acquisition and Test Instruments
The ATSAMD51J19A-AUT-EFP powers portable oscilloscopes, logic analyzers, and USB DAQ modules where 120 MHz Cortex-M4F DSP and integrated USB simplify the BOM. The 12-bit ADC (up to 1 Msps) plus external ADC over SERCOM captures waveforms, while the dual-panel 512 KB Flash stores calibration tables and user scripts. USB Full-Speed provides 12 Mbps uplink to host PCs for real-time streaming - sufficient for low-bandwidth DAQ. The -AUT temperature grade suits field-service test gear operating in non-conditioned environments, and the -EFP bin keeps flash reads fast during battery-only operation at 1.8 V.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51J19A-AUT-EFP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51J19A-AFT | ATSAMD51J18A-AUT | ATSAMD51J19A-AU-EFP | ATSAMD51G19A-MFT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Core / Clock Speed | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz |
| Flash | 512 KB | 512 KB | 256 KB (-50%) | 512 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 128 KB (-33%) | 192 KB | 192 KB |
| Temperature Grade | Automotive -40C to +125C | Industrial -40C to +85C | Automotive -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C |
| Extended Flash Performance (-EFP) | Yes | No (standard bin) | No (standard bin) | Yes | No (standard bin) |
| USB Full-Speed Transceiver | Integrated | Integrated | Integrated | Integrated | Integrated |
| AEC-Q100 | Qualified | Not qualified (industrial) | Qualified | Not qualified (industrial) | Not qualified (industrial) |
Key Differentiators
- Extended Flash Performance (EFP) bin enables full-speed flash reads at low VDD (vs ATSAMD51J19A-AFT)
- Automotive AEC-Q100 grade (-40C to +125C) (vs ATSAMD51J19A-AU-EFP)
- Same-die footprint compatibility across the SAM D51 family (vs ATSAMD51J18A-AUT)
Design Notes
Place a 100 nF X7R 0402 ceramic decoupling capacitor within 2 mm of every VDD/VDDIO pin, plus one 4.7 uF bulk capacitor per VDD domain (analog and digital separately). The SAM D51 datasheet section 13 specifies power-supply sequencing requirements when VDDIO > VDD by more than 0.3 V - in those cases, ramp VDD first or use a Schottky clamp. Estimated: total decoupling budget for a 64-TQFP design is typically 12-16 capacitors.
Route the USB DP/DM pair as a 90 ohm differential impedance with length matching under 2 mm. Keep the pair away from switching nodes and add a ground guard trace on each side for EMI immunity. Place ESD protection diodes (e.g. USBLC6-2SC6P6P) within 3 mm of the USB connector. The integrated Full-Speed PHY eliminates the need for an external PLL, but the PCB still requires careful impedance control to pass USB compliance.
Do not exceed the absolute maximum VDD of 3.6 V - the SAM D51 family is NOT 5 V tolerant on GPIO. For 5 V systems, use level shifters such as the TXS0108E. The -EFP bin matters only for low-VDD designs; at 3.3 V the standard bin is electrically equivalent. Avoid toggling the BOOTPROT register after enabling secure boot without backing up the application - a misconfiguration can brick the device and require external debug to recover.
Estimated: at maximum active load (120 MHz CPU + USB + ADC), the SAM D51 in a 64-TQFP package dissipates approximately 150-200 mW. With a theta_JA around 40 C/W, the junction temperature rise is 8C above ambient at room temperature - well within the 125C automotive limit. For enclosed industrial cabinets without airflow, derate by 30-40%.
Compliance Information
AEC-Q100 qualified (automotive grade) per Microchip SAM D51 product family documentation. RoHS and REACH compliant; lead-free and halogen-free per Microchip Material Composition Declaration. Conflict-minerals CMRT compliant.
