ATSAME51J19A-AFT - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
MPN: ATSAME51J19A-AFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $7.85 | $78.50 |
| 100 | $6.95 | $695.00 |
| 500 | $6.21 | $3,105.00 |
| 1,000 | $5.62 | $5,620.00 |
ATSAME51J19A-AFT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one silicon die. The Cortex-M4F class adds a hardware single-precision Floating Point Unit and DSP-extending instructions, making this category of MCU well-suited to motor control, digital signal processing, sensor fusion, and industrial control tasks where deterministic latency and computational density are required.
Key features of the ATSAME51J19A-AFT include the ARM Cortex-M4F core with FPU and DSP extensions, 512 KB dual-panel Flash with ECC, 192 KB SRAM, dual CAN-FD controllers, a high-speed USB 2.0 Full-Speed interface, and an Event System for inter-peripheral signaling. The device integrates up to 51 programmable I/O pins, multiple SERCOM (serial communication) instances configurable as UART/SPI/I2C, and a 12-bit 1 MSPS analog-to-digital converter. The Cortex-M4F core with FPU and DSP extensions is the primary performance differentiator versus Cortex-M0/M3 competitors.
Architecturally, the SAM E51 uses a multi-bus AHB/APB matrix that allows simultaneous data transfers between the CPU, DMA, and peripherals without stalling the core. The dual-panel Flash enables live firmware updates without downtime by switching between two physical Flash banks. The integrated FPU accelerates IEEE-754 single-precision math, while the DSP extensions handle single-cycle MAC operations on 16-bit data, which are essential for motor-control algorithms.
Typical applications include industrial automation controllers, CAN-FD node endpoints in vehicle gateways and industrial backbones, USB device or embedded-host peripherals (e.g., HID, CDC, mass storage), motor control and inverter drives, and IoT sensor hubs with edge processing. The dual CAN-FD and high-speed USB combination is particularly well aligned with industrial gateway and smart-factory designs.
When designing with this device, ensure the TCXO-crystal or external clock source meets the 120 MHz specification and that the on-board decoupling is sized per the SAM E51 hardware design checklist. Programming is supported via Microchip's MPLAB X IDE with MPLAB Harmony 3 framework, providing production-ready peripheral drivers and middleware.
This page synthesizes verified distributor pricing, same-brand drop-in alternatives in the same 64-TQFP footprint, and practical design considerations not aggregated in the manufacturer datasheet.
Drop-in alternatives for ATSAME51J19A-AFT — 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-AFT (same form factor and footprint) — differing in ADC, Package, DAC, USB, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME51J19A-AF
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →ATSAME51J18A-AFT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →ATSAMD51J19A-AFT
✅ Drop-In✓ In Stock
$4.8 / Unit
View Datasheet →ATSAME51J18A-AUT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →ATSAMD51J19A-MF
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →ATSAME51J19A-AFT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with FPU and DSP extensions |
| Maximum CPU Clock | 120 MHz |
| Flash Memory | 512 KB (dual-panel with ECC) |
| SRAM | 192 KB |
| Operating Voltage | 3.3 V (1.71 V to 3.6 V core VDD) |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Pin Count | 64 |
| CAN-FD Interfaces | 2 |
| USB Interface | USB 2.0 Full-Speed (Device/Host) |
| ADC | 12-bit, up to 1 MSPS |
| SERCOM | Up to 6 (UART/SPI/I2C configurable) |
| Programmable I/O | Up to 51 |
| Operating Temperature | -40C to +125C (Extended Industrial) |
| AEC-Q100 Qualification | Automotive grade available in family |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
ATSAME51J19A-AFT Pin Configuration
| Pin 1 | PD11 — General-purpose I/O / SERCOM |
| Pin 2 | PD12 — General-purpose I/O / SERCOM |
| Pin 3 | PA27 — General-purpose I/O |
| Pin 4 | PA28 — General-purpose I/O |
| Pin 5 | PA30 — General-purpose I/O |
| Pin 6 | PA31 — General-purpose I/O / SWDIO |
| Pin 7 | VDD — Core supply voltage |
| Pin 8 | GND — Ground |
| Pin 9 | PB0 — General-purpose I/O |
| Pin 10 | PB1 — General-purpose I/O |
| Pin 11 | PB2 — General-purpose I/O / SERCOM |
| Pin 12 | PB3 — General-purpose I/O / SERCOM |
| Pin 13 | PB4 — General-purpose I/O / SERCOM |
| Pin 14 | PB5 — General-purpose I/O / SERCOM |
| Pin 15 | PB6 — General-purpose I/O |
| Pin 16 | PB7 — General-purpose I/O |
| Pin 17 | PB8 — General-purpose I/O |
| Pin 18 | PB9 — General-purpose I/O |
| Pin 19 | PA0 — General-purpose I/O / ADC |
| Pin 20 | PA1 — General-purpose I/O / ADC |
| Pin 21 | PA2 — General-purpose I/O / ADC |
| Pin 22 | PA3 — General-purpose I/O / ADC |
| Pin 23 | PA4 — General-purpose I/O / ADC |
| Pin 24 | PA5 — General-purpose I/O / ADC |
| Pin 25 | PA6 — General-purpose I/O / ADC |
| Pin 26 | PA7 — General-purpose I/O / ADC |
| Pin 27 | PA8 — General-purpose I/O / SERCOM |
| Pin 28 | PA9 — General-purpose I/O / SERCOM |
| Pin 29 | PA10 — General-purpose I/O / SERCOM |
| Pin 30 | PA11 — General-purpose I/O / SERCOM |
| Pin 31 | VDDIO — I/O supply voltage |
| Pin 32 | GND — Ground |
| Pin 33 | PC0 — General-purpose I/O |
| Pin 34 | PC1 — General-purpose I/O |
| Pin 35 | PC2 — General-purpose I/O |
| Pin 36 | PC3 — General-purpose I/O |
| Pin 37 | PC4 — General-purpose I/O |
| Pin 38 | PC5 — General-purpose I/O |
| Pin 39 | PC6 — General-purpose I/O |
| Pin 40 | PC7 — General-purpose I/O |
| Pin 41 | PC10 — General-purpose I/O |
| Pin 42 | PC11 — General-purpose I/O |
| Pin 43 | PC12 — General-purpose I/O |
| Pin 44 | PC13 — General-purpose I/O |
| Pin 45 | PC14 — General-purpose I/O |
| Pin 46 | PC15 — General-purpose I/O |
| Pin 47 | PA12 — General-purpose I/O / SERCOM |
| Pin 48 | PA13 — General-purpose I/O / SERCOM |
| Pin 49 | PA14 — General-purpose I/O / SERCOM |
| Pin 50 | PA15 — General-purpose I/O / SERCOM |
| Pin 51 | PA16 — General-purpose I/O |
| Pin 52 | PA17 — General-purpose I/O |
| Pin 53 | PA18 — General-purpose I/O |
| Pin 54 | PA19 — General-purpose I/O |
| Pin 55 | PD0 — General-purpose I/O |
| Pin 56 | PD1 — General-purpose I/O |
| Pin 57 | PD2 — General-purpose I/O |
| Pin 58 | PD3 — General-purpose I/O |
| Pin 59 | PD4 — General-purpose I/O |
| Pin 60 | PD5 — General-purpose I/O |
| Pin 61 | PD6 — General-purpose I/O |
| Pin 62 | PD7 — General-purpose I/O |
| Pin 63 | PD8 — General-purpose I/O / CAN-FD |
| Pin 64 | PD9 — General-purpose I/O / CAN-FD |
Typical Applications
ATSAME51J19A-AFT is suitable for 6 applications: Industrial CAN-FD Gateway, USB-Connected Sensor Hub, Motor Control Drive (BLDC/PMSM), Industrial Automation Controller, IoT Edge Sensor Node, Automotive Body and Gateway Module.
Industrial CAN-FD Gateway
The ATSAME51J19A-AFT's two on-chip CAN-FD controllers make it a strong fit for industrial gateways bridging classic CAN, CAN-FD, and Ethernet or USB backbones. With a 120 MHz Cortex-M4F core plus 512 KB Flash, it can run full TCP/IP stacks alongside CAN-FD message filtering without CPU saturation. The 192 KB SRAM holds routing tables and frame buffers. Per Microchip's SAM E51 datasheet, the CAN-FD peripherals are ISO 11898-1:2015 compliant and support up to 64-byte payloads at 5 Mbit/s. The 64-TQFP industrial-grade package operates at -40C to +125C, suitable for cabinet and DIN-rail mounting.
Recommended
USB-Connected Sensor Hub
The ATSAME51J19A-AFT integrates a USB 2.0 Full-Speed controller that supports both Device and Embedded Host roles, enabling USB CDC, HID, or MSC peripherals directly without an external interface chip. Combined with the 12-bit 1 MSPS ADC and up to 6 SERCOM interfaces (UART/SPI/I2C), the device aggregates sensor data from SPI or I2C sensors and exposes it over USB. The 120 MHz core provides sufficient headroom to run a lightweight TCP/IP or command parser stack. The 64-TQFP 10x10 mm footprint fits compact sensor-hub PCBs.
Recommended
Motor Control Drive (BLDC/PMSM)
The ATSAME51J19A-AFT's Cortex-M4F core with single-precision FPU and DSP extensions executes single-cycle MAC instructions on 16-bit data, ideal for field-oriented control (FOC) algorithms on BLDC and PMSM motors. The 120 MHz clock and 192 KB SRAM hold sine tables, PID state, and ADC sampling windows. Per Microchip's SAM E51 datasheet, the integrated PWM timers, quadrature encoders, and 12-bit ADC synchronized to the PWM provide the timing determinism required for field-oriented control. The AEC-Q100 availability in family and -40C to +125C rating support industrial cabinet or vehicular installations.
Recommended
Industrial Automation Controller
The ATSAME51J19A-AFT is well suited for programmable logic controllers (PLCs), HMI front ends, and protocol converters in industrial automation. Its dual CAN-FD handles industrial protocols like CANopen or DeviceNet, while SERCOM channels support RS-485 Modbus RTU, SPI displays, and I2C IO expanders. The 512 KB dual-panel Flash allows live firmware updates on the factory floor without production downtime, and ECC protects against single-bit memory corruption in noisy industrial environments. The 64-TQFP industrial-grade package ensures reliable operation from -40C to +125C.
Recommended
IoT Edge Sensor Node
The ATSAME51J19A-AFT serves as an edge-compute IoT node aggregating analog and digital sensor data, performing local signal conditioning on its Cortex-M4F DSP core, and reporting results via CAN-FD, USB, or UART. Its 192 KB SRAM supports time-series buffering, and the 12-bit 1 MSPS ADC captures high-bandwidth signals. Per Microchip's SAM E51 datasheet, low-power Sleep and Standby modes with RTC retention extend battery life in remote installations. The 64-TQFP package is footprint-stable across the SAM E51 family, easing future upgrades to higher-memory variants.
Recommended
Automotive Body and Gateway Module
The SAM E51 family includes AEC-Q100 qualified variants that share the ATSAME51J19A-AFT's pinout and silicon, making it a candidate for automotive body controllers and gateway modules. Dual CAN-FD is essential for modern vehicle networks that carry diagnostics and chassis data, and the 512 KB Flash stores bootloader plus application. Per Microchip's product page, AEC-Q100 variants are available with full PPAP and qualification documentation. The 120 MHz Cortex-M4F core and DSP extensions support software-defined CAN message handling and edge analytics.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME51J19A-AFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME51J19A-AF | ATSAME51J18A-AFT | ATSAMD51J19A-AFT | ATSAME51J18A-AUT | ATSAMD51J19A-MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| 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 Memory | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 256 KB | 192 KB | 256 KB | 192 KB |
| CAN-FD Controllers | 2 | 2 | 2 | 1 | 2 | 1 |
| USB 2.0 Full-Speed | Yes (Device/Host) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Carrier Format | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
Key Differentiators
- Dual CAN-FD controllers versus SAM D51 family's single CAN-FD (vs ATSAMD51J19A-AFT)
- 256 KB SRAM option available in same 64-TQFP footprint (J18A variant) (vs ATSAME51J18A-AFT)
- Drop-in Tray variant for low-volume prototype and qualification builds (vs ATSAME51J19A-AF)
Design Notes
Per Microchip's SAM E51 hardware design checklist, place a 1 uF and a 100 nF decoupling capacitor in parallel as close as possible to each VDD and VDDIO pin pair. The internal core logic is sensitive to supply transients during DMA bursts; bulk capacitance on the 3.3 V rail should be sized to supply the worst-case 120 MHz core current without exceeding 5% ripple. For USB applications, route AVDD independently from VDD with a ferrite bead to keep digital switching noise out of the USB analog supply.
The 64-TQFP (10x10 mm) package has a 0.5 mm pitch with no exposed thermal pad. Ensure PCB escape routing does not violate manufacturer design rules (typically 0.2 mm trace/space minimum on inner layers). The USB DM/DP differential pair must be routed as a 90-ohm impedance-controlled pair with length matching to within 150 mil per USB 2.0 Full-Speed specification. For CAN-FD signals, maintain a 120-ohm characteristic impedance differential pair and place a 120-ohm termination resistor at each bus end.
Do not attempt to program the ATSAME51J19A-AFT without the SWD interface wired correctly: SWDIO (PA31), SWCLK (PA30), and GND must be accessible via a 10-pin Cortex Debug connector or Tag-Connect footprint. The Bootloader entry via the BOOTPROT fuse must be configured before locking the device, or you risk bricking the part. When migrating from SAM D51 to SAM E51, confirm that your existing CAN driver handles the second CAN-FD controller; reusing a SAM D51 driver on a SAM E51 will leave CAN1 uninitialized. The dual-panel Flash requires careful linker script configuration to enable live firmware updates without CPU stalls during bank switches.
Compliance Information
RoHS compliant per Microchip product page. The ATSAME51J19A-AFT itself is industrial-grade (-40C to +125C); AEC-Q100 qualified automotive variants are available within the SAM E51 family under separate ordering codes (consult Microchip for specific -AZ/AF automotive suffix codes).
