ATSAME51J19A-AU-EFP - 120MHz Cortex-M4F MCU 512KB | Microchip
MPN: ATSAME51J19A-AU-EFP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.42 | $9.42 |
| 10 | $8.74 | $87.40 |
| 100 | $7.55 | $755.00 |
| 500 | $6.89 | $3,445.00 |
| 1,000 | $6.2 | $6,200.00 |
ATSAME51J19A-AU-EFP Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, volatile and non-volatile memory, programmable peripherals, and I/O lines, and the Cortex-M4F architecture extends the baseline Cortex-M instruction set with single-precision IEEE-754 floating-point, saturating arithmetic, and DSP macros. MCUs occupy the lowest tier of the embedded-compute hierarchy - they integrate more functions than a microprocessor (which requires external memory) but less compute density than an MPU/SOC. The Cortex-M4F class typically targets deterministic real-time control with moderate DSP load, distinguishing it from Cortex-M0/M0+ (low-power, integer only) and Cortex-M7 (high-end DSP + Ethernet/display).
Key features include an integrated Full-Speed USB 2.0 device/host with PHY, two CAN-FD controllers, a 12-bit 1-MSPS ADC, multiple SERCOM (SERial COMmunication) channels configurable as UART/SPI/I2C, a TCC timer subsystem for motor control, and AES/SHA hardware crypto. The 64-pin TQFP package and -40C to +85C industrial temperature range support 5V-tolerant I/O on selected pins.
Architecturally, the SAM E51/E53 family uses an in-application programmable Flash with dual-bank support for fail-safe firmware update, a separate boot-ROM for secure bootloader flows, and a multi-layer AHB/APB bus matrix with tightly-coupled peripherals to reduce interrupt latency below 12 cycles. The part is intended for automotive, industrial automation, and IoT edge nodes requiring USB, CAN, and deterministic real-time performance.
Typical applications include industrial sensors, building automation nodes, USB peripherals such as human-interface devices (HIDs), CAN-based distributed control, and low-end motor control loops. Compared with the sibling ATSAME51J18A (Flash 256 KB), the J19A variant doubles the program memory while sharing the same peripheral set.
When designing with this device, ensure decoupling follows Microchip's AN3335 guidance (one 100 nF + one 4.7 uF near each power pin), plan for IDE selection between MPLAB X, Atmel Studio, and third-party GCC/IAR toolchains, and reserve the SWD/SWO debug pads in a footprint-compatible 0.05-inch header.
This page synthesizes distributor pricing, drop-in TQFP-64 alternatives from the SAME51 family, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for both component selection and design-in.
Drop-in alternatives for ATSAME51J19A-AU-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 ATSAME51J19A-AU-EFP (same form factor and footprint) — differing in ADC, Operating Temperature, CAN, SERCOM, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME51J19A-AFT
✅ Drop-In✓ In Stock
$5.62 / Unit
View Datasheet →ATSAME51J18A-AU-EFP
✅ Drop-In✓ In Stock
$5.78 / Unit
View Datasheet →ATSAME51J19A-AF
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →ATSAME51J18A-AFT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →ATSAME51J18A-AUT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.65 / Unit
View Datasheet →ATSAME51J18A-AF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.85 / Unit
View Datasheet →ATSAME51J19A-AU-EFP Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F (32-bit with FPU + DSP) |
| Maximum CPU Clock | 120 MHz |
| Flash Program Memory | 512 KB (512K x 8) |
| Operating Voltage | 1.62 V to 3.6 V |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| USB | Full-Speed USB 2.0 Device/Host (integrated PHY) |
| CAN | 2x CAN-FD controllers |
| Crypto Accelerator | AES, SHA (hardware) |
| RoHS Status | Compliant |
| Sample Part Suffix Meaning | AU = TQFP-64 industrial grade, EFP = Extended Flash Performance |
ATSAME51J19A-AU-EFP Pin Configuration
| Pin 1 | VDDIO — I/O supply voltage (1.62 V to 3.6 V) |
| Pin 2 | PA00 — GPIO / SERCOM1 PAD0 |
| Pin 3 | PA01 — GPIO / SERCOM1 PAD1 |
| Pin 4 | PA02 — GPIO / SERCOM0 PAD2 / ADC AIN0 |
| Pin 5 | PA03 — GPIO / SERCOM0 PAD3 / ADC AIN1 |
| Pin 6 | PA04 — GPIO / SERCOM0 PAD0 |
| Pin 7 | PA05 — GPIO / SERCOM0 PAD1 |
| Pin 8 | PA06 — GPIO / SERCOM2 PAD2 |
| Pin 9 | PA07 — GPIO / SERCOM2 PAD3 |
| Pin 10 | PA08 — GPIO / SERCOM2 PAD0 / I2S |
| Pin 11 | PA09 — GPIO / SERCOM2 PAD1 / I2S |
| Pin 12 | PA10 — GPIO / SERCOM2 PAD2 |
| Pin 13 | PA11 — GPIO / SERCOM2 PAD3 / USB D- |
| Pin 14 | PA12 — GPIO / SERCOM4 PAD0 / USB D+ |
| Pin 15 | PA13 — GPIO / SERCOM4 PAD1 |
| Pin 16 | PA14 — GPIO / SERCOM4 PAD2 |
| Pin 17 | PA15 — GPIO / SERCOM4 PAD3 |
| Pin 18 | PA16 — GPIO / SERCOM3 PAD0 / I2C |
| Pin 19 | PA17 — GPIO / SERCOM3 PAD1 / I2C |
| Pin 20 | PA18 — GPIO / SERCOM3 PAD2 |
| Pin 21 | PA19 — GPIO / SERCOM3 PAD3 |
| Pin 22 | PA20 — GPIO / SERCOM5 PAD2 |
| Pin 23 | PA21 — GPIO / SERCOM5 PAD3 |
| Pin 24 | PA22 — GPIO / SERCOM5 PAD0 |
| Pin 25 | PA23 — GPIO / SERCOM5 PAD1 |
| Pin 26 | PA24 — GPIO / SERCOM5 PAD2 / USB ID |
| Pin 27 | PA25 — GPIO / SERCOM5 PAD3 / USB VBUS |
| Pin 28 | PB00 — GPIO / SERCOM5 PAD2 |
| Pin 29 | PB01 — GPIO / SERCOM5 PAD3 |
| Pin 30 | PB02 — GPIO / SERCOM5 PAD0 / ADC |
| Pin 31 | PB03 — GPIO / SERCOM5 PAD1 / ADC |
| Pin 32 | PB04 — GPIO / SERCOM4 PAD0 |
| Pin 33 | PB05 — GPIO / SERCOM4 PAD1 |
| Pin 34 | PB06 — GPIO / SERCOM4 PAD2 |
| Pin 35 | PB07 — GPIO / SERCOM4 PAD3 |
| Pin 36 | PB08 — GPIO / SERCOM4 PAD0 / I2C |
| Pin 37 | PB09 — GPIO / SERCOM4 PAD1 / I2C |
| Pin 38 | PB10 — GPIO / SERCOM4 PAD2 |
| Pin 39 | PB11 — GPIO / SERCOM4 PAD3 |
| Pin 40 | PB12 — GPIO / SERCOM4 PAD0 |
| Pin 41 | PB13 — GPIO / SERCOM4 PAD1 |
| Pin 42 | PB14 — GPIO / SERCOM4 PAD2 |
| Pin 43 | PB15 — GPIO / SERCOM4 PAD3 |
| Pin 44 | VREGA — Voltage regulator A output (analogue) |
| Pin 45 | VREGB — Voltage regulator B output (digital) |
| Pin 46 | VDDIO — I/O supply voltage |
| Pin 47 | GND — Common ground |
| Pin 48 | VDD — Core voltage supply |
| Pin 49 | PC00 — GPIO / SERCOM6 PAD0 / CAN0 RX |
| Pin 50 | PC01 — GPIO / SERCOM6 PAD1 / CAN0 TX |
| Pin 51 | PC02 — GPIO / SERCOM6 PAD2 / CAN1 RX |
| Pin 52 | PC03 — GPIO / SERCOM6 PAD3 / CAN1 TX |
| Pin 53 | PC04 — GPIO / SERCOM7 PAD0 |
| Pin 54 | PC05 — GPIO / SERCOM7 PAD1 |
| Pin 55 | PC06 — GPIO / SERCOM7 PAD2 / TC4 |
| Pin 56 | PC07 — GPIO / SERCOM7 PAD3 / TC5 |
| Pin 57 | PC08 — GPIO / SERCOM6 PAD0 |
| Pin 58 | PC09 — GPIO / SERCOM6 PAD1 |
| Pin 59 | PC10 — GPIO / SERCOM6 PAD2 |
| Pin 60 | PC11 — GPIO / SERCOM6 PAD3 |
| Pin 61 | PC12 — GPIO / SERCOM7 PAD0 |
| Pin 62 | PC13 — GPIO / SERCOM7 PAD1 |
| Pin 63 | PC14 — GPIO / SERCOM7 PAD2 / SWDIO |
| Pin 64 | PC15 — GPIO / SERCOM7 PAD3 / SWCLK |
Typical Applications
ATSAME51J19A-AU-EFP is suitable for 7 applications: Industrial Sensor Controllers, USB Human-Interface Devices (HID), CAN-FD Automotive Sub-Nodes, IoT Edge / Building Automation Gateways, Low-End BLDC / Stepper Motor Control, Data-Acquisition Front-Ends, Industrial Touch Panels / HMI.
Industrial Sensor Controllers
The ATSAME51J19A-AU-EFP fits industrial sensor hubs with its 120 MHz Cortex-M4F and hardware floating-point, enabling on-chip sensor fusion and PID control without DSP co-processors. The integrated Full-Speed USB 2.0 with on-chip PHY eliminates external USB transceivers, while two CAN-FD controllers support industrial fieldbus protocols simultaneously. Use it between a 4-20 mA analog front-end and an Ethernet gateway; the 12-bit 1 MSPS ADC captures multiple sensor channels while the FPU runs Kalman filters at >1 kHz loop rate.
Recommended
USB Human-Interface Devices (HID)
USB HID peripherals benefit from the ATSAME51J19A-AU-EFP's integrated USB 2.0 Full-Speed Device stack, on-chip 3.3 V regulator, and 120 MHz Cortex-M4F compute headroom for embedded host-side scripting. The 64-pin TQFP lands comfortably on a 2-layer PCB and the 5V-tolerant I/O tolerates legacy matrix key-scanner logic. Place between the USB connector (with ESD protection) and the host PC; the FPU serves gesture-recognition algorithms at <3 ms latency while offloading matrix-scan housekeeping to SERCOM + TCC timers.
Recommended
CAN-FD Automotive Sub-Nodes
Although the ATSAME51J19A-AU-EFP is industrial-grade (not AEC-Q100), the two hardware CAN-FD controllers plus hardware crypto make it a strong sub-node controller behind an AEC-Q100 gateway. The dual-bank Flash enables fail-safe firmware update while the 120 MHz Cortex-M4F runs CANopen / J1939 protocol stacks. Use as a body-controller sub-module between the CAN bus and actuator MOSFETs; reducing CAN bus load and letting the gateway handle AEC-Q100 responsibility while this MCU manages diagnostics and actuator sequencing.
Recommended
IoT Edge / Building Automation Gateways
IoT edge gateways leverage the ATSAME51J19A-AU-EFP's combination of Full-Speed USB, CAN-FD, and multiple SERCOM channels (configurable as UART/SPI/I2C) to bridge disparate field networks. The 512 KB Flash stores local fall-back firmware during WAN outages and the 120 MHz FPU runs AES/SHA acceleration for MQTT-TLS without external crypto chips. Use as the main controller bridging RS-485 / CAN sensors to Wi-Fi/Ethernet via USB; the crypto accelerators speed handshake to <150 ms while DMA channels avoid CPU stalls on bulk transfers.
Recommended
Low-End BLDC / Stepper Motor Control
Motor-control loops under 50 kHz PWM benefit from the ATSAME51J19A-AU-EFP's TCC (Timer/Counter for Control) peripherals, deterministic Cortex-M4F interrupts, and on-chip op-amps / comparators that close current-sense feedback. The 120 MHz core handles FOC (Field-Oriented Control) up to 4 phases; the 64-pin TQFP ball-marshals gate-driver signals without external muxes. Use it between shunt current-sense amplifiers and a 3-phase inverter stage; the FPU keeps the Park/Clarke transforms under 4 us at each PWM period.
Recommended
Data-Acquisition Front-Ends
High-channel-count data acquisition front-ends exploit the ATSAME51J19A-AU-EFP's 12-bit 1 MSPS ADC with multiple trigger sources, DMA-driven sample buffer, and 512 KB Flash to store calibration tables. The Cortex-M4F MAC/SIMD runs FFT-based spectrum analysis on the same chip, turning the MCU into a self-contained DAQ node. Use as the ADC sequencer + local FFT processor between the analog input MUX and an Ethernet / USB link; DMA offload keeps conversion throughput >800 kSPS while the CPU runs signal-averaging and windowing.
Recommended
Industrial Touch Panels / HMI
Industrial HMI panels need USB upstream, FPU-accelerated graphics, and industrial temperature - a perfect fit for the ATSAME51J19A-AU-EFP. The 512 KB Flash can hold multi-language menus, the on-chip USB OTG can attach to a host PC, and the SERCOM channels drive SPI displays or resistive touch controllers. Use as the main MCU between a color TFT display and USB upstream; the FPU speeds touch-gesture smoothing while DMA-fed SERCOM drives the display refresh at >30 fps without CPU involvement.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME51J19A-AU-EFP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME51J19A-AFT | ATSAME51J18A-AU-EFP | ATSAME51J19A-AF |
|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 512 KB | 512 KB | 256 KB | 512 KB |
| CPU Core | Cortex-M4F | Cortex-M4F | Cortex-M4F | Cortex-M4F |
| Maximum Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| USB | Yes, FS USB 2.0 with PHY | Yes, FS USB 2.0 with PHY | Yes, FS USB 2.0 with PHY | Yes, FS USB 2.0 with PHY |
| CAN-FD | 2 controllers | 2 controllers | 2 controllers | 2 controllers |
| Temperature Range | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Larger program Flash than the J18A sibling (vs ATSAME51J18A-AU-EFP)
- Standard AU (industrial) temperature grade from Microchip SAME51 family (vs ATSAME51J18A-AUT)
- EFP suffix indicates Extended Flash Performance calibration data (vs ATSAME51J18A-AF)
- Integrated 3.3 V LDO + DC-DC converter with EFP suffix factory-trimmed (vs ATSAME51J18A-AU)
Design Notes
Estimated power budget assuming VDD = 3.3 V and CPU active at 120 MHz: Core current ~25 mA, peripheral + ADC + USB ~15 mA, totaling ~40 mA active, and ~5-10 uA standby with RTC running. Provide one 100 nF X7R decoupling cap per VDD and VDDIO pin within 3 mm of the package, plus one 4.7 uF bulk capacitor on the AVDD rail. The SAME51 internal DC-DC converter needs an external 4.7 uH inductor between VREGA and VREGB - omit it only in bypass mode and refer to AN3335.
Keep the 64-pin TQFP footprint on the 2-layer standard 0.5 mm-pitch land pattern with thermal pad connection through several ground-tied vias. Route SWDIO and SWCLK pairs with 50 ohm controlled impedance and keep them away from USB D+/D- to avoid crosstalk. Place the 32.768 kHz crystal within 5 mm of the XIN/XOUT pins with short traces and an isolated ground pour.
Do not leave the SWD pins floating during production - either program the SAMD/SAME51 lock-bits after firmware load or pull SWDIO/SWCLK to defined logic levels to avoid accidental entry into programming mode. Verify the BODVDD threshold (1.62 V minimum operating voltage) matches your 3.3 V regulator's droop margin at max load; an undersized LDO can trip brown-out under motor stall.
When using USB Full-Speed, route the D+/D- lines as 90 ohm differential pair of matched length under 50 mm, and place the ESD protection array TPD2E001 or equivalent within 3 mm of the connector. Avoid running RF / switching signals under the TQFP thermal pad to prevent coupling into the analog VREGA rail.
Estimated: to meet USB FS signal-quality spec, ensure the cable-side common-mode choke and 22 ohm series resistors are within 1 cm of the D+/D- pins and that the VBUS sensing debounce is at least 100 ms to comply with USB 2.0 inrush rules.
Compliance Information
RoHS and REACH compliance stated on Microchip product page. Industrial temperature grade -40C to +85C - NOT AEC-Q100 qualified; for automotive designs contact Microchip automotive support. Lead-free and halogen-free per Microchip material-declaration doc.
