ATSAME51G19A-MFT - 120MHz Cortex-M4F MCU 512KB Flash | Microchip
MPN: ATSAME51G19A-MFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.18 | $61.80 |
| 100 | $5.46 | $546.00 |
| 500 | $4.92 | $2,460.00 |
| 1,000 | $4.41 | $4,410.00 |
| 3,000 | $3.95 | $11,850.00 |
ATSAME51G19A-MFT Overview
An ARM Cortex-M4F microcontroller is a 32-bit MCU core with single-precision floating-point unit and DSP extensions, sitting within the broader hierarchy: microcontroller -> embedded microprocessor -> SoC. The Cortex-M4F class is widely adopted for motor control, IoT edge nodes, and industrial HMI because it balances deterministic real-time behaviour with sufficient compute for signal-processing and connectivity stacks.
Key features of the ATSAME51G19A-MFT include 512 KB dual-panel Flash with ECC, up to 256 KB SRAM with ECC, a high-speed USB 2.0 Full-Speed device/host interface, two CAN-FD controllers, an SD/MMC host controller, up to 99 I/O pins, a 12-bit 1 MSPS ADC, dual 12-bit DACs, and multiple SERCOM (SERial COMmunication) instances configurable as UART/SPI/I2C/LIN. The integrated FPU accelerates single-precision math for sensor fusion and digital filter routines, while the Memory Protection Unit and ECC on Flash/SRAM support safety-relevant firmware integrity.
Architecturally, the device combines the Cortex-M4F core with a 4-channel DMA, Event System for deterministic inter-peripheral signalling, and a low-power SleepWalking peripheral set. The 1.62-3.6 V wide operating range lets it run from a single Li-ion cell or 3.3 V system rail. The 48-QFN (MF suffix) variant is offered in -40C to +125C industrial grade and ships on tape-and-reel.
Typical applications include industrial CAN-FD sensor hubs, USB-connected data loggers, motor control BLDC/PMSM drive boards, building automation gateways, and portable medical accessories. It is also widely used as a main MCU on IoT edge nodes bridging low-power wireless modules to cloud services.
Designers should pay attention to decoupling (one 100 nF per VDD pin plus a 4.7 uF bulk), exposed-pad soldering for thermal relief, and supply sequencing when 3.3 V and 1.8 V rails are derived separately. The MF QFN package requires careful trace routing under the pad to avoid signal-integrity issues on the high-speed USB lines.
This page synthesises distributor pricing, drop-in and same-package alternatives, application references, and design notes that go beyond the manufacturer datasheet, helping procurement and firmware engineers shortlist, source, and validate the part quickly.
Drop-in alternatives for ATSAME51G19A-MFT — 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 ATSAME51G19A-MFT (same form factor and footprint) — differing in Package, SRAM, Operating Temperature, CAN, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME51G19A-MUT
✅ Drop-In✓ In Stock
$5.04 / Unit
View Datasheet →ATSAME51G18A-MFT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATSAME51J19A-MFT
✅ Drop-In✓ In Stock
$5.78 / Unit
View Datasheet →ATSAMD51G19A-MFT
✅ Drop-In✓ In Stock
$4.02 / Unit
View Datasheet →ATSAME54P20A-MFT
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAMD51G18A-MFT
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATSAME51G19A-MFT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with FPU |
| Maximum Clock Speed | 120 MHz |
| Program Memory (Flash) | 512 KB (dual-panel, with ECC) |
| SRAM | 192 KB (with ECC) |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Package | 48-VQFN (7x7 mm) with exposed pad |
| Operating Temperature | -40C to +125C (industrial) |
| USB Interface | USB 2.0 Full-Speed Device/Host |
| CAN Interface | 2x CAN-FD controllers |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 2x 12-bit |
| I/O Pins (max) | 99 (variant dependent) |
| DMA Channels | 16 |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified (Automotive grade variant exists in family) |
| Series | SAM E51 (SAM D5X/E5X Family) |
ATSAME51G19A-MFT Pin Configuration
| Pin 1 | PA00 — GPIO / XIN32 |
| Pin 2 | PA01 — GPIO / XOUT32 |
| Pin 3 | VDDIO — I/O supply |
| Pin 4 | GND — Ground |
| Pin 5 | PA02 — GPIO / AIN0 |
| Pin 6 | PA03 — GPIO / AIN1 |
| Pin 7 | PB00 — GPIO |
| Pin 8 | PB01 — GPIO |
| Pin 9 | PB02 — GPIO / AIN10 |
| Pin 10 | PB03 — GPIO / AIN11 |
| Pin 11 | PB04 — GPIO |
| Pin 12 | PB05 — GPIO |
| Pin 13 | PB06 — GPIO |
| Pin 14 | PB07 — GPIO |
| Pin 15 | PB08 — GPIO |
| Pin 16 | PB09 — GPIO |
| Pin 17 | PA04 — GPIO / AIN2 |
| Pin 18 | PA05 — GPIO / AIN3 |
| Pin 19 | PA06 — GPIO / AIN4 |
| Pin 20 | PA07 — GPIO / AIN5 |
| Pin 21 | PA08 — GPIO / I2C SDA |
| Pin 22 | PA09 — GPIO / I2C SCL |
| Pin 23 | PA10 — GPIO |
| Pin 24 | PA11 — GPIO / USB D- |
| Pin 25 | PA12 — GPIO / USB D+ |
| Pin 26 | PA13 — GPIO |
| Pin 27 | PA14 — GPIO |
| Pin 28 | PA15 — GPIO |
| Pin 29 | PA16 — GPIO |
| Pin 30 | PA17 — GPIO |
| Pin 31 | PA18 — GPIO |
| Pin 32 | PA19 — GPIO |
| Pin 33 | PA20 — GPIO |
| Pin 34 | PA21 — GPIO |
| Pin 35 | PA22 — GPIO |
| Pin 36 | PA23 — GPIO |
| Pin 37 | PA24 — GPIO / USB VBUS |
| Pin 38 | PA25 — GPIO |
| Pin 39 | RESETn — Reset input, active low |
| Pin 40 | VDDIO — I/O supply |
| Pin 41 | GND — Ground |
| Pin 42 | VDDIN — Main voltage regulator input |
| Pin 43 | VDDCORE — Core voltage output (decoupling) |
| Pin 44 | PA27 — GPIO |
| Pin 45 | PA28 — GPIO |
| Pin 46 | PA29 — GPIO |
| Pin 47 | PA30 — GPIO / SWCLK |
| Pin 48 | PA31 — GPIO / SWDIO |
| Pin 49 | EP — Exposed pad - must be soldered to GND plane |
Typical Applications
ATSAME51G19A-MFT is suitable for 7 applications: Industrial CAN-FD Sensor Hub, USB Data Logger, BLDC / PMSM Motor Control, Building Automation Gateway, Portable Medical Accessory, IoT Edge Sensor Node, HMI Touch Panel Controller.
Industrial CAN-FD Sensor Hub
The ATSAME51G19A-MFT fits industrial CAN-FD sensor hubs because it integrates 2 CAN-FD controllers, 512 KB Flash with ECC, and a Cortex-M4F running up to 120 MHz. With 192 KB SRAM it comfortably runs J1939/CANopen stacks plus a TLS library for cloud uplinks. Its -40C to +125C industrial range suits factory-floor deployment. Place the MCU between the CAN transceiver and an RS-485 or Ethernet gateway; the ECC-protected Flash supports long-life firmware updates required for IIoT deployments.
Recommended
USB Data Logger
The ATSAME51G19A-MFT is well suited for USB-connected data loggers thanks to its integrated USB 2.0 Full-Speed device/host controller with on-chip transceiver. The 120 MHz Cortex-M4F digitises sensors through a 12-bit 1 MSPS ADC while streaming to USB MSD or HID endpoints. The 512 KB Flash accommodates circular buffer firmware plus USB class stacks; 192 KB SRAM handles sample buffers. Compared to a discrete USB-UART bridge solution, this approach lowers BOM cost and improves timing determinism.
Recommended
BLDC / PMSM Motor Control
The ATSAME51G19A-MFT drives BLDC and PMSM motors using its Cortex-M4F with FPU for Park/Clarke transforms and SVPWM. The 120 MHz clock delivers enough headroom for field-oriented control loops under 10 us, and the dual 12-bit DACs can be used for offset trimming. Its 16 DMA channels and Event System offload sample-and-conversion tasks from the core. Industrial 125C support allows placement near motor drivers. For low-side shunt current sensing, the 1 MSPS 12-bit ADC provides sufficient bandwidth for 50 kHz PWM.
Recommended
Building Automation Gateway
The ATSAME51G19A-MFT functions as a building-automation gateway bridging KNX, Modbus, BACnet, and LoRaWAN or Wi-Fi modules. The 6 SERCOM instances and 2 CAN-FD controllers provide the multiple protocol channels required, while 512 KB Flash holds TLS/CoAP stacks. Wide 1.62-3.6 V supply tolerance lets it run from a single 3.3 V rail alongside Wi-Fi or sub-GHz modules. Compared to lower-end Cortex-M0+ gateways, the FPU accelerates JSON parsing and edge analytics.
Recommended
Portable Medical Accessory
The ATSAME51G19A-MFT is used in portable medical accessories such as handheld patient monitors and connected spirometers where reliability and industrial temperature range matter. The 512 KB Flash and 192 KB SRAM support RTOS-based application stacks plus a USB device interface for charging cradle communication. ECC on Flash and SRAM reduces risk of undetected memory faults critical for IEC 62304 firmware lifecycle processes. Its low 1.62 V operation allows single-cell Li-ion use with efficient boost regulators.
Recommended
IoT Edge Sensor Node
The ATSAME51G19A-MFT powers IoT edge sensor nodes aggregating multiple I2C/SPI sensors before publishing over LoRa, BLE, or Wi-Fi. The Cortex-M4F's FPU accelerates FFT and Kalman filtering on vibration or environmental data, while the Event System guarantees deterministic wake-ups from low-power sleep. Compared with bare Cortex-M0+ nodes, the E51 offers substantial on-chip RAM and CAN-FD for richer edge protocols. The 48-QFN compact package supports miniaturised node PCBs.
Recommended
HMI Touch Panel Controller
The ATSAME51G19A-MFT serves as the main MCU in industrial HMI touch panels where it drives TFT displays via its parallel/SPI interfaces while decoding capacitive touch controllers. The 120 MHz core supports lvgl-style graphics libraries with hardware double buffering in the 192 KB SRAM. The 2 CAN-FD ports connect to vehicle or machine buses. Compared to HMI controllers without FPU, the E51 enables smoother animations and richer fonts without external SDRAM in smaller panels.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME51G19A-MFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME51G19A-MUT | ATSAME51G18A-MFT | ATSAMD51G19A-MFT | ATSAME51J19A-MFT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7) | 48-QFN (7x7) | 48-VQFN (7x7) | 48-VQFN (7x7) | 64-QFN |
| Core | Cortex-M4F @ 120 MHz | Cortex-M4F @ 100 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz |
| Flash | 512 KB | 512 KB | 256 KB | 512 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 192 KB | 192 KB | 256 KB |
| CAN-FD | 2x | 2x | 2x | 0 (no CAN-FD) | 2x |
| USB | FS Device/Host | FS Device/Host | FS Device/Host | FS Device/Host | FS Device/Host |
| Operating Voltage | 1.62-3.6 V | 1.62-3.6 V | 1.62-3.6 V | 1.62-3.6 V | 1.62-3.6 V |
| Temperature Grade | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated dual CAN-FD controllers with ECC Flash/SRAM (vs ATSAMD51G19A-MFT)
- Higher maximum clock speed at 120 MHz versus 100 MHz (vs ATSAME51G19A-MUT)
- Larger 512 KB Flash versus 256 KB in same package (vs ATSAME51G18A-MFT)
Design Notes
Place a 100 nF X7R 0402 decoupling capacitor within 2 mm of every VDD pin and a single 4.7 uF X5R bulk capacitor on VDDIN. For the USB pair (PA11/PA12) place the 22 ohm series resistors and ESD protection as close to the connector as possible, and keep D+/D- traces matched to within 0.5 mm. The exposed pad (pin 49) must be soldered to a continuous ground plane with at least 9 thermal vias to maximise heat dissipation in motor-drive applications.
Estimated: at 120 MHz, VDD=3.3 V, the core draws approximately 18 mA (60 mW). The 48-VQFN has theta_JA around 35 C/W on a 4-layer JEDEC test board, giving a 2.1 C rise above ambient - well within the 125 C limit. In closed enclosures or motor-drive boards with low copper, derate by measuring the actual junction rise with the internal temperature sensor channel against a known reference.
Common pitfalls when using the ATSAME51G19A-MFT include: (1) forgetting the 1 uF capacitor on the VBUS pin for USB host operation; (2) configuring a SERCOM as I2C without the internal pull-up enabled, leaving the bus floating; (3) using PA24/PA25 as GPIO without disabling the USB controller, causing pin contention; (4) failing to set the NVMCTRL wait states for 120 MHz operation, which causes Flash read errors. Always consult the ASF4/Harmony 3 configuration files before bringing up a custom board.
Route the SWD signals (PA30 SWCLK, PA31 SWDIO) with ground guard traces to a 10-pin Cortex Debug header placed at the board edge for programming access. Keep CAN-FD differential pair impedance at 120 ohm +/-10% and match length to within 5 mm. If using the SD/MMC interface, keep CLK short and isolate from analog signals. Place the 32.768 kHz crystal within 5 mm of XIN32/XOUT32 with a grounded guard ring for low-jitter RTC operation.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 qualification available on the -MFTVAO automotive-grade variant of the family. Reach compliance per EU SVHC declaration.
