ATSAME51G19A-MU - 120MHz ARM Cortex-M4F MCU, 512KB Flash | Microchip
MPN: ATSAME51G19A-MU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.99 | $8.99 |
| 10 | $8.1 | $81.00 |
| 100 | $7.2 | $720.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.65 | $5,650.00 |
ATSAME51G19A-MU Overview
A microcontroller (MCU) such as the ATSAME51G19A-MU is a programmable processor-on-a-chip combining CPU core, non-volatile program memory, volatile data memory, peripherals, and interrupt logic on a single die. Within the broader taxonomy, MCUs sit beneath microprocessors in capability and power, occupying the space between 8-bit microcontrollers and Cortex-A-class application processors. The SAM E51 series belongs to the Cortex-M4F class - deterministic, low-latency, DSP-extended controllers designed for real-time embedded control with native floating-point support.
Key features include the Cortex-M4F core with FPU and DSP extensions, dual-panel Flash with ECC for safety, 192 KB SRAM with ECC, a 16 KB instruction cache, an 8-channel DMA controller, and a comprehensive clock tree supporting 48 MHz USB operation from the internal 48 MHz DFLL or an external crystal. The 12-bit 1 Msps ADC provides 16 analog inputs, while the 12-bit DAC supports up to 500 ksps. Operating voltage spans 1.62V to 3.6V.
Architecturally, the SAM E51 implements a Harvard bus with separate AHB/APB bridges, deterministic latency for interrupts, and TrustZone-M-lite secure boot via the on-chip cryptographic accelerator. The Cortex-M4F DSP extensions accelerate FFT, FIR, and matrix arithmetic, while the FPU handles sensor-fusion math without software floating-point overhead.
Typical applications include industrial automation controllers, USB-CAN bridge gateways, IoT edge nodes, motor-control front ends, low-cost audio streaming devices, and human-machine interface (HMI) panels with TFT displays. The wide 1.62V-3.6V supply range allows direct Li-ion and 3.3V regulated rails.
When designing with the ATSAME51G19A-MU, ensure the PCB footprint accommodates the 48-VQFN 7x7 mm land pattern with thermal pad and that decoupling is placed within 2 mm of every supply pin. The internal 48 MHz DFLL requires a 32.768 kHz crystal reference for USB Full-Speed and CAN-FD accuracy.
Drop-in alternatives for ATSAME51G19A-MU β 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-MU (same form factor and footprint) β differing in ADC, Package, SRAM, DAC, Operating Temperature.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAME51G19A-MUT
β Drop-Inβ In Stock
$5.04 / Unit
View Datasheet βATSAME51G18A-MU
β Drop-Inβ In Stock
$4.35 / Unit
View Datasheet βATSAME51G18A-MFT
β Drop-Inβ In Stock
$3.95 / Unit
View Datasheet βATSAME51J20A-MF
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD51G19A-MU
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD51G19A-MFT
β Drop-Inβ In Stock
$4.02 / Unit
View Datasheet βATSAME51G19A-MU Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with FPU and DSP extensions |
| Maximum Clock Frequency | 120 MHz |
| Program Memory (Flash) | 512 KB |
| SRAM | 192 KB |
| Instruction Cache | 16 KB |
| Package | 48-pin VQFN (7x7 mm) |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| ADC | 12-bit, up to 1 Msps, 16 channels |
| DAC | 12-bit, up to 500 ksps |
| USB | USB 2.0 Full-Speed with on-chip PHY |
| CAN | CAN-FD |
| SERCOM Peripherals | 8 configurable (UART/SPI/I2C) |
| DMA Channels | 8 |
| Cryptography | AES, TRNG, secure boot (TrustZone-M-lite) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
ATSAME51G19A-MU Pin Configuration
| Pin 1 | PA00 β GPIO PA00 / I2S_SDI / TCC0-WO0 |
| Pin 2 | PA01 β GPIO PA01 / I2S_SDO / TCC0-WO1 |
| Pin 3 | PA02 β GPIO PA02 / ADC_AIN0 / VOUT |
| Pin 4 | PA03 β GPIO PA03 / ADC_AIN1 |
| Pin 5 | GND β Ground |
| Pin 6 | VDDIO β I/O supply voltage 1.62-3.6V |
| Pin 7 | VDDCORE β Core supply (internal LDO output, decouple) |
| Pin 8 | VDDIN β Voltage regulator input |
| Pin 9 | GND β Ground |
| Pin 10 | PA04 β GPIO PA04 / ADC_AIN2 |
| Pin 11 | PA05 β GPIO PA05 / ADC_AIN3 |
| Pin 12 | PA06 β GPIO PA06 / ADC_AIN4 |
| Pin 13 | PA07 β GPIO PA07 / ADC_AIN5 |
| Pin 14 | PA08 β GPIO PA08 / I2C-SDA0 / SERCOM0 |
| Pin 15 | PA09 β GPIO PA09 / I2C-SCL0 / SERCOM0 |
| Pin 16 | PA10 β GPIO PA10 / SERCOM2 |
| Pin 17 | PA11 β GPIO PA11 / SERCOM2 |
| Pin 18 | PA12 β GPIO PA12 / SERCOM4 |
| Pin 19 | PA13 β GPIO PA13 / SERCOM4 |
| Pin 20 | PA14 β GPIO PA14 / SERCOM4 / XIN32 |
| Pin 21 | PA15 β GPIO PA15 / SERCOM4 / XOUT32 |
| Pin 22 | PA16 β GPIO PA16 / SERCOM1 |
| Pin 23 | PA17 β GPIO PA17 / SERCOM1 |
| Pin 24 | PA18 β GPIO PA18 / SERCOM1 |
| Pin 25 | PA19 β GPIO PA19 / SERCOM1 |
| Pin 26 | PA20 β GPIO PA20 / SERCOM3 |
| Pin 27 | PA21 β GPIO PA21 / SERCOM3 |
| Pin 28 | PA22 β GPIO PA22 / SERCOM3 / I2S-FS |
| Pin 29 | PA23 β GPIO PA23 / SERCOM3 / I2S-BCLK |
| Pin 30 | PA24 β GPIO PA24 / USB-DM |
| Pin 31 | PA25 β GPIO PA25 / USB-DP |
| Pin 32 | PA27 β GPIO PA27 / TC5-WO1 |
| Pin 33 | RESETn β Reset (active-low) |
| Pin 34 | SWDIO β Debug data |
| Pin 35 | SWCLK β Debug clock |
| Pin 36 | PA28 β GPIO PA28 |
| Pin 37 | PA29 β GPIO PA29 / CAN0-TX |
| Pin 38 | PA30 β GPIO PA30 / CAN0-RX |
| Pin 39 | PA31 β GPIO PA31 |
| Pin 40 | PB00 β GPIO PB00 |
| Pin 41 | PB01 β GPIO PB01 |
| Pin 42 | PB02 β GPIO PB02 / ADC_AIN6 |
| Pin 43 | PB03 β GPIO PB03 / ADC_AIN7 |
| Pin 44 | PB04 β GPIO PB04 / ADC_AIN8 |
| Pin 45 | PB05 β GPIO PB05 / ADC_AIN9 |
| Pin 46 | GND β Ground (thermal pad) |
| Pin 47 | VDDIO β I/O supply |
| Pin 48 | VDDIN β Voltage regulator input |
Typical Applications
ATSAME51G19A-MU is suitable for 7 applications: Industrial CAN-FD Gateway, USB-to-CAN Bridge Dongle, IoT Edge Sensor Node, Low-Cost Audio Streaming Device, HMI Display Controller, Motor Control Front End (FOC / Trapezoidal), Secure Data Logger with USB.
Industrial CAN-FD Gateway
The ATSAME51G19A-MU is engineered for industrial CAN-FD gateway designs, with hardware CAN-FD controllers supporting ISO 11898-1:2015 bit rates up to 5 Mbps and 8 SERCOM ports for UART/SPI/I2C fan-out to RS-485, RS-232, and Modbus nodes. Its 120 MHz Cortex-M4F core with DSP extensions handles CAN message filtering, motor telemetry parsing, and predictive-maintenance analytics without software bottlenecks. The 192 KB SRAM buffers bursty CAN traffic while the AES-256 hardware accelerator secures tunneled payloads. Place the MCU between the CAN transceiver (e.g., MCP2562FD) and the upstream Ethernet or USB host; supply decoupling (100 nF + 4.7 uF) must be within 2 mm of VDD pins.
Recommended
USB-to-CAN Bridge Dongle
The ATSAME51G19A-MU's USB 2.0 Full-Speed with on-chip transceiver-less PHY pairs natively with CAN-FD for compact USB-to-CAN diagnostic dongles used in automotive OBD-II and industrial field service. The 120 MHz core sustains 1 ms CAN cycle times while maintaining a USB CDC endpoint for host data exchange, and the 16 KB instruction cache accelerates USB protocol handling. Compared to a discrete USB-FS chip plus a separate MCU, the integrated design reduces BOM count by ~30% and PCB area. Connect VBUS to the USB connector with ESD protection (e.g., USBLC6-2SC6) and route D+/D- as a 90-ohm differential pair.
Recommended
IoT Edge Sensor Node
For battery-powered IoT edge sensor nodes, the ATSAME51G19A-MU delivers 12-bit ADC sampling at 1 Msps across 16 channels, enabling multi-sensor aggregation (temperature, pressure, current, vibration) with hardware oversampling to push effective resolution to 14 bits. The Cortex-M4F DSP extensions run FFTs on vibration spectra for predictive maintenance, while the AES-256 engine secures MQTT-TLS payloads. At 1.62 V minimum supply, the MCU interfaces directly to Li-coin cells or single-cell Li-ion via an LDO. Sleep-mode current with RTC running is in the low-microamp range, suitable for years-long deployments.
Recommended
Low-Cost Audio Streaming Device
The ATSAME51G19A-MU integrates a dedicated I2S/SSC (Synchronous Serial Controller) interface for direct connection to external audio codecs like the SGTL5000 or WM8904, supporting 16/24/32-bit audio at 8-96 kHz sample rates. Combined with the Cortex-M4F DSP, designers can implement software codecs (Opus, SBC) for Bluetooth audio bridges or USB-C audio adapters. The 192 KB SRAM holds ~80 ms of 48 kHz stereo 24-bit audio buffers, and the 12-bit DAC drives line-level outputs for monitoring applications. Use a low-jitter 12.288 MHz crystal for I2S master-clock accuracy.
Recommended
HMI Display Controller
For low-cost human-machine interface (HMI) panels with small TFT or OLED displays, the ATSAME51G19A-MU drives displays up to 320x240 QVGA via its SPI/QSPI peripheral and 8 SERCOM ports for touch-controller and keypad I/O. The 120 MHz core renders LVGL or emWin UIs at 30+ FPS while leaving headroom for sensor polling. Hardware-accelerated DMA offloads SPI transfers, freeing the CPU for logic. Industrial -40C to +85C temperature allows outdoor and factory-floor HMI deployment. Connect the display reset and backlight PWM to GPIO for dimming control.
Recommended
Motor Control Front End (FOC / Trapezoidal)
The ATSAME51G19A-MU executes Field-Oriented Control (FOC) algorithms on its Cortex-M4F DSP at PWM frequencies up to 30 kHz, controlling 3-phase BLDC or PMSM motors up to several hundred watts. The 12-bit 1 Msps ADC samples phase currents simultaneously via the integrated ADC sequencer, while 8 SERCOM peripherals handle encoder (SPI), I2C sensors, and UART command interface. Hardware QEI (Quadrature Encoder Interface) and TCC (Timer/Counter for Control) peripherals generate complementary PWM with dead-band insertion. The 48-VQFN exposed pad dissipates the ~0.5-1 W CPU load at industrial temperatures.
Recommended
Secure Data Logger with USB
The ATSAME51G19A-MU is ideal for tamper-resistant data loggers, integrating AES-256 hardware encryption, a hardware True Random Number Generator (TRNG), and secure-boot via the TrustZone-M-lite root-of-trust. The 512 KB Flash holds firmware plus encrypted configuration, while the 192 KB SRAM buffers log records before flushing to external SPI Flash or SD cards via SERCOM. USB Full-Speed enables authenticated firmware updates and log retrieval. Industrial temperature range and ECC-protected memory satisfy IEC 61508 SIL-2 functional-safety requirements for energy and process instrumentation.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME51G19A-MU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME51G19A-MUT | ATSAME51G18A-MU | ATSAME51J20A-MF | ATSAMD51G19A-MU | ATSAMD51G19A-MFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7 mm) | 48-VQFN (7x7 mm) - same | 48-VQFN (7x7 mm) - same | 48-VQFN (7x7 mm) - same | 48-VQFN (7x7 mm) - same | 48-VQFN (7x7 mm) - same |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz |
| Flash Memory | 512 KB | 512 KB | 256 KB | 1 MB | 512 KB | 512 KB |
| SRAM | 192 KB | 192 KB | 192 KB | 256 KB | 192 KB | 192 KB |
| CAN-FD | Yes | Yes | Yes | Yes | No | No |
| USB FS | Yes (on-chip PHY) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. Unit Price (qty 1000) | $5.65 | ~$5.65 | ~$4.95 | ~$7.20 | ~$5.20 | ~$5.20 |
Key Differentiators
- Integrated CAN-FD controller alongside USB FS (vs ATSAMD51G19A-MU)
- Industrial -40C to +85C operating range (vs ATSAME51G19A-MF)
- Dedicated I2S/SSC audio interface (vs ATSAMD51G19A-MU)
Design Notes
The ATSAME51G19A-MU has three supply pins: VDDIN (regulator input, 1.62-3.6 V), VDDIO (I/O supply, must equal VDDIN), and VDDCORE (internal LDO output, decouple only). Place a 1 uF X7R 0402 ceramic capacitor within 2 mm of each VDD pin and a 4.7 uF bulk capacitor near the package. If VDDIO and VDDIN are tied, one shared ferrite bead reduces switching noise. Estimated: at 120 MHz active mode, the MCU draws ~25 mA, so total decoupling must support ~50 mA peak transient handling.
The 48-VQFN package has an exposed thermal pad that must be soldered to a copper pour for heat dissipation. For designs running at 120 MHz with all peripherals active, power dissipation is typically 0.3-0.5 W. Connect the thermal pad to GND with at least 8 thermal vias in a 0.3 mm-pitch array to a ground plane on the opposite PCB layer. Industrial -40C to +85C operation is achievable without a heatsink if the PCB copper area exceeds 100 mm^2 on top side.
Route USB D+/D- as a 90-ohm differential pair (zoomed-in spacing ~0.8 mm on FR-4) with maximum length 50 mm and no splits in the reference plane. Place the crystal XIN/XOUT traces short and symmetric, with ground guard traces on either side. The SWD/SWC pins should be brought out to a 10-pin Cortex Debug header or Tag-Connect for programming. Avoid routing high-speed signals across the thermal pad cutout zone to minimize return-path discontinuities.
Common pitfalls: (1) Forgetting to configure the PA24/PA25 USB pins as GPIO-disabled peripheral function before USB stack init; (2) failing to calibrate the internal 48 MHz DFLL against a 32.768 kHz crystal reference within 2 seconds of startup, causing USB enumeration failure; (3) using too-low-value decoupling capacitors that cause VDD droop during DMA bursts; (4) omitting the external 32.768 kHz crystal load capacitors, leading to RTC drift >2 minutes/day; (5) routing SWD signals near noisy switching nodes, causing debug lockup under EMI stress.
When routing SERCOM SPI at >10 MHz, use source-series termination (22-33 ohm resistor at driver output) to dampen ringing on long traces (>50 mm). For CAN-FD signals at 5 Mbps, keep bus stubs under 50 mm and use a 120-ohm termination at each bus end. I2S/SSC MCLK should be a 12.288 MHz crystal reference (low jitter, <50 ps RMS) for 96 kHz audio; a generic MCU crystal may introduce jitter audible as TDM noise floor degradation.
Compliance Information
RoHS compliant and lead-free per Microchip product page. Industrial -40C to +85C operating range; AEC-Q100 qualified versions exist in the SAME51 family but the standard MU part is not AEC-Q100 - check ATSAME51G19A-MUT-EFP or ATSAME51G19A-MF-EFP for automotive.
