ATSAMD51G19A-MFT - 120MHz Cortex-M4F MCU, 512KB Flash | Microchip
MPN: ATSAMD51G19A-MFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.1 | $61.00 |
| 100 | $5.18 | $518.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.02 | $4,020.00 |
ATSAMD51G19A-MFT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals (timers, ADC, communication controllers, GPIO) into one package. The ARM Cortex-M family is the dominant 32-bit MCU architecture for embedded systems, and Cortex-M4F specifically adds hardware single-precision floating point and DSP extensions, making it a step up from Cortex-M0/M3 parts in signal-processing capability. The SAM D51 line sits in Microchip's high-performance tier, between the mainstream SAM D20/D21 and the more capable SAME70/SAMS70 families.
Key features of the ATSAMD51G19A-MFT include six SERCOM modules (each configurable as UART/SPI/I2C), a 12-bit 1 Msps ADC with up to 16 channels, a 10-bit 300 ksps DAC, multiple 16-bit timers, an I2S/SSC audio interface, a CAN-FD controller, and a QSPI interface for external memory expansion. The device also integrates a full-speed USB 2.0 transceiver supporting both device and host modes, eliminating the need for an external PHY in most designs.
On the architecture side, the ATSAMD51G19A-MFT uses Microchip's event system, a peripheral-to-peripheral interconnect that lets timers, DMA, and GPIO trigger each other without CPU intervention - useful for low-latency, deterministic real-time designs. The dual-panel Flash with ECC and the banked SRAM layout support firmware updates in the field while executing from the other bank, simplifying bootloader design for IoT and remote-update products.
Typical applications include USB human-interface devices (keyboards, mice, audio class peripherals), industrial sensor hubs, motor control boards, IoT gateways, and audio-processing subsystems. The combination of USB, CAN-FD, and 1 Msps ADC makes it a strong fit for industrial instrumentation where a single MCU can handle both communications and analog front-end work.
When laying out a board, dedicate continuous copper under the exposed pad to the same ground plane, place the 32.768 kHz and 12 MHz crystals within 5 mm of their pins, and keep the VDDIO and VDDCORE decoupling (100 nF + 1 uF per pin) within 2 mm of each supply pin. USB DP/DM traces must be 90 ohm differential and length-matched.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides, giving a complete procurement and engineering decision view in one place.
Drop-in alternatives for ATSAMD51G19A-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 ATSAMD51G19A-MFT (same form factor and footprint) — differing in SRAM, Package, DAC, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51G18A-MFT
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATSAMD51G19A-MUT-EFP
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAMD51G19A-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.4 / Unit
View Datasheet →ATSAME51G19A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD51G19A-MU-EFP
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.85 / Unit
View Datasheet →ATSAMD51J19A-AFT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.8 / Unit
View Datasheet →ATSAMD51G19A-MFT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with FPU and DSP instructions |
| Maximum CPU Clock | 120 MHz |
| Flash Memory | 512 KB (dual-panel with ECC) |
| SRAM | 192 KB (with ECC) |
| Operating Voltage (VDDIO) | 1.71 V to 3.63 V |
| Operating Temperature | -40C to +125C (extended industrial) |
| Package | 48-pin VQFN (7x7 mm) |
| USB | USB 2.0 Full-Speed device and host (integrated PHY) |
| SERCOM Modules | 6 (each configurable as UART/SPI/I2C) |
| ADC | 12-bit, up to 1 Msps, up to 16 channels |
| DAC | 10-bit, 300 ksps |
| Timers | 16-bit TC, 32-bit TCC |
| CAN | CAN-FD controller |
| External Bus Interface | QSPI / SERCOM-based |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
ATSAMD51G19A-MFT Pin Configuration
| Pin 1 | PA00 — GPIO / XIN32 (32.768 kHz crystal input) |
| Pin 2 | PA01 — GPIO / XOUT32 (32.768 kHz crystal output) |
| Pin 3 | PA02 — GPIO / AIN0 (ADC input) |
| Pin 4 | PA03 — GPIO / AIN1 (ADC input) |
| Pin 5 | GND — Ground |
| Pin 6 | VDDIO — I/O supply voltage |
| Pin 7 | PA04 — GPIO / AIN2 / VREF |
| Pin 8 | PA05 — GPIO / AIN3 |
| Pin 9 | PA06 — GPIO / AIN4 |
| Pin 10 | PA07 — GPIO / AIN5 |
| Pin 11 | PA08 — GPIO / AIN6 / I2S SDI |
| Pin 12 | PA09 — GPIO / AIN7 / I2S SDO |
| Pin 13 | PA10 — GPIO / AIN8 / I2S FS |
| Pin 14 | PA11 — GPIO / AIN9 / I2S SCK |
| Pin 15 | PA12 — GPIO / AIN10 |
| Pin 16 | PA13 — GPIO / AIN11 |
| Pin 17 | PA14 — GPIO / AIN12 |
| Pin 18 | PA15 — GPIO / AIN13 |
| Pin 19 | PA16 — GPIO / AIN14 / SERCOM1 PAD0 |
| Pin 20 | PA17 — GPIO / AIN15 / SERCOM1 PAD1 |
| Pin 21 | PA18 — GPIO / SERCOM1 PAD2 |
| Pin 22 | PA19 — GPIO / SERCOM1 PAD3 |
| Pin 23 | PA20 — GPIO / SERCOM3 PAD0 |
| Pin 24 | PA21 — GPIO / SERCOM3 PAD1 |
| Pin 25 | PA22 — GPIO / SERCOM3 PAD2 |
| Pin 26 | PA23 — GPIO / SERCOM3 PAD3 |
| Pin 27 | PA24 — GPIO / USB D- (DP/DM as alt) |
| Pin 28 | PA25 — GPIO / USB D+ |
| Pin 29 | GND — Ground |
| Pin 30 | VDDIO — I/O supply voltage |
| Pin 31 | PA27 — GPIO |
| Pin 32 | PA28 — GPIO |
| Pin 33 | PA29 — GPIO / CAN0 TX |
| Pin 34 | PA30 — GPIO / CAN0 RX |
| Pin 35 | PA31 — GPIO / SWDIO (programming) |
| Pin 36 | PB00 — GPIO / SWCLK (programming) |
| Pin 37 | PB01 — GPIO |
| Pin 38 | PB02 — GPIO / QSPI CS |
| Pin 39 | PB03 — GPIO / QSPI SCK |
| Pin 40 | PB04 — GPIO / QSPI D0 |
| Pin 41 | PB05 — GPIO / QSPI D1 |
| Pin 42 | PB06 — GPIO / QSPI D2 |
| Pin 43 | PB07 — GPIO / QSPI D3 |
| Pin 44 | GND — Ground |
| Pin 45 | VDDIO — I/O supply voltage |
| Pin 46 | XIN — 12 MHz crystal input (or external clock) |
| Pin 47 | XOUT — 12 MHz crystal output |
| Pin 48 | RESET — Active-low reset input |
Typical Applications
ATSAMD51G19A-MFT is suitable for 7 applications: USB Human Interface Device (HID), Industrial Sensor Hub, Audio Processing Subsystem, IoT Edge Gateway, Motor Control Board, USB Audio Class (UAC) Device, Data Acquisition Module.
USB Human Interface Device (HID)
The ATSAMD51G19A-MFT's integrated USB 2.0 Full-Speed device/host transceiver and 120 MHz Cortex-M4F core make it a strong fit for USB HID peripherals such as keyboards, mice, game controllers, and presentation remotes. The 1 Msps ADC supports analog joystick or potentiometer inputs without external signal conditioning, while 6 SERCOM modules handle additional UART/SPI/I2C peripherals such as NFC readers or BLE co-processors. The 512 KB dual-bank Flash allows USB firmware update (DFU) bootloaders in one bank while the application runs in the other, and the 192 KB SRAM easily handles HID report buffers and protocol state machines.
Recommended
Industrial Sensor Hub
In an industrial sensor hub the ATSAMD51G19A-MFT's 12-bit 1 Msps ADC samples multiple analog channels (temperature, pressure, flow) while the CAN-FD controller streams aggregated data to a central controller. The 120 MHz Cortex-M4F runs signal-processing algorithms (FFT, Kalman filter) on incoming ADC data in real time thanks to its DSP instructions and hardware FPU, offloading work from the central controller. The extended -40C to +125C temperature rating of the -MFT suffix is essential for factory-floor deployments near motors or heaters. The 192 KB SRAM accommodates large sensor data buffers without resorting to external memory.
Recommended
Audio Processing Subsystem
The ATSAMD51G19A-MFT's I2S/SSC interface, hardware FPU, and 120 MHz performance make it a natural choice for audio processing subsystems such as USB audio interfaces, headphone DACs with DSP, and hearing-aid processing stages. The dual-bank Flash supports field-updateable DSP algorithms, while the 192 KB SRAM is sufficient for typical audio block sizes (256-1024 samples per channel). The 10-bit DAC can output reference or test tones, and the 6 SERCOM ports provide flexible connectivity to external audio codecs, Bluetooth modules, and user-interface displays.
Recommended
IoT Edge Gateway
For IoT edge gateways, the ATSAMD51G19A-MFT serves as a local aggregator that collects data over multiple SERCOM UARTs (Bluetooth, RS-485, RS-232), processes it on the Cortex-M4F with hardware FPU, and forwards results over USB host to a Wi-Fi or LTE module. The QSPI interface allows expansion with an external Flash for data logging, while the CAN-FD controller supports industrial IoT protocols used in building automation and factory equipment. The 512 KB Flash and 192 KB SRAM comfortably host TLS stacks, MQTT clients, and sensor-fusion firmware simultaneously.
Recommended
Motor Control Board
In motor control applications the ATSAMD51G19A-MFT's 32-bit TCC timers with dead-time insertion and complementary PWM outputs drive three-phase BLDC or PMSM motors directly, while the Cortex-M4F DSP instructions execute field-oriented control (FOC) loops at high update rates. The 1 Msps ADC samples phase currents synchronously to the PWM cycle for accurate torque control, and the CAN-FD controller exposes the motor state to a supervisory controller. The extended -40C to +125C temperature grade of the -MFT suffix handles the thermal environment of motor-drive enclosures.
Recommended
USB Audio Class (UAC) Device
The ATSAMD51G19A-MFT's USB 2.0 Full-Speed device mode natively supports USB Audio Class 1.0 and 2.0 device profiles without external PHY hardware, simplifying USB headset, USB microphone, and USB DAC designs. The I2S/SSC port interfaces to external audio codecs (such as the SGTL5000 or PCM5102A) while the Cortex-M4F handles USB isochronous transfers, sample-rate conversion, and volume control. The 192 KB SRAM provides generous buffer headroom for USB packet queuing, while 512 KB Flash accommodates USB audio class drivers and DSP effects such as equalization or virtual surround.
Recommended
Data Acquisition Module
The ATSAMD51G19A-MFT's 12-bit 1 Msps ADC with up to 16 channels, 192 KB SRAM, and QSPI expansion support make it a strong fit for multi-channel data acquisition modules used in test equipment and laboratory instrumentation. The Cortex-M4F's DSP instructions accelerate FFT analysis and digital filtering on incoming samples, while the dual-bank Flash stores calibration coefficients and application firmware. The USB device interface streams captured data to a host PC at full speed, and the 6 SERCOM ports connect to additional sensors or front-panel controls.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51G19A-MFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51G18A-MFT | ATSAMD51G19A-MUT-EFP | ATSAMD51G19A-MU | ATSAME51G19A-MUT | ATSAMD51G19A-MU-EFP | ATSAMD51J19A-AFT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7) | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same | 64-TQFP - different (pinout variant) |
| 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 | Cortex-M4F 120 MHz |
| Flash Memory | 512 KB | 256 KB | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 192 KB | 192 KB | 192 KB | 192 KB | 192 KB |
| Operating Temperature | -40C to +125C (extended) | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| USB | Full-Speed Device + Host | Full-Speed Device + Host | Full-Speed Device + Host | Full-Speed Device + Host | Full-Speed Device + Host | Full-Speed Device + Host | Full-Speed Device + Host |
| Ethernet MAC | No | No | No | No | Yes | No | No |
| Approx Unit Price (qty 100) | $5.18 | $4.55 | $5.18 | $4.85 | $6.20 | $4.85 | $5.50 |
Key Differentiators
- Full-speed USB device + host with integrated transceiver (vs ATSAMD21G18A-MF)
- Cortex-M4F with hardware FPU and DSP instructions (vs ATSAMD21J18A-MFT)
- CAN-FD controller integrated (vs ATSAMD21E18A-MF)
Design Notes
Place the 32.768 kHz crystal within 5 mm of pins 1-2 (PA00/PA01) and the 12 MHz crystal within 5 mm of pins 46-47 (XIN/XOUT). Use short, symmetric traces with a ground guard ring to minimize EMI coupling. Place the 100 nF + 1 uF VDDIO decoupling pair within 2 mm of each VDDIO pin (pins 6, 30, 45), and a single 100 nF + 4.7 uF pair on VDDCORE within 2 mm of the internal regulator output. The exposed pad must be soldered to a continuous ground copper pour with at least 8 thermal vias for heat dissipation.
USB DP (PA25) and DM (PA24) traces must be routed as a 90-ohm differential pair with length matching within 150 mil. Keep the differential pair away from switching signals, oscillators, and high-current traces. Place the USB series ferrite bead and ESD protection diode (such as USBLC6-2SC6) within 5 mm of the USB connector. The total DP/DM trace length should not exceed 50 mm to stay within USB 2.0 Full-Speed signal integrity requirements.
Do not skip the 32.768 kHz crystal or its load capacitors - the SAM D51 uses this for RTC accuracy, USB SOF framing, and power-management timing. Configure unused pins as inputs with pull-up enabled to avoid floating-pin current draw. Always include a 10 kohm pull-up on the RESET pin (pin 48) and a 1 nF cap to ground for proper reset behavior. When migrating from the ATSAM D20/D21 series, verify the SERCOM peripheral multiplexing - SAM D51 has 6 SERCOMs with different pin assignments than D20/D21.
Estimated: at maximum CPU activity (120 MHz, all peripherals enabled) the ATSAMD51G19A-MFT dissipates approximately 120 mW. The 48-pin VQFN (7x7) package has a junction-to-ambient thermal resistance of approximately 35 C/W on a standard JEDEC 4-layer test board, resulting in a junction temperature rise of about 4.2 C above ambient - well within safe limits. For applications above 70 C ambient, ensure the PCB ground copper pour under the exposed pad is at least 100 mm^2 to maintain thermal headroom.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial -40C to +125C temperature rating; not AEC-Q100 qualified for automotive. For automotive applications, choose ATSAMx51 variants with the -AUTO or -VAO suffix.
