ATSAMD51P19A-CTUT - 120MHz Cortex-M4F MCU, 512KB Flash, 120-TFBGA | Microchip
MPN: ATSAMD51P19A-CTUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $9.1 | $91.00 |
| 100 | $8.05 | $805.00 |
| 500 | $7.2 | $3,600.00 |
| 1,000 | $6.4 | $6,400.00 |
| 3,000 | $5.55 | $16,650.00 |
ATSAMD51P19A-CTUT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals (ADC, DAC, timers, communication controllers) on one die. Within the broader taxonomy, the ATSAMD51 sits in the Cortex-M4 class of mid-to-high performance microcontrollers, above Cortex-M0/M3 parts and below Cortex-M7 application processors; SAM D51 specifically is Microchip's general-purpose performance tier positioned between the lower-power SAMD20 and the higher-end SAME70. This 120 MHz Cortex-M4F class is widely used in IoT, industrial control, and consumer HMI designs that need DSP instructions, single-precision float, and deterministic interrupt response.
Key features that distinguish this part include its 120 MHz core with FPU and DSP extensions, dual-panel Flash with hardware ECC for safety, an on-chip Full-Speed USB 2.0 device/host controller, a 12-bit 1 MSPS ADC with up to 16 channels, a 12-bit 1 MSPS DAC, multiple SERCOM interfaces configurable as UART/SPI/I2C, a 16-bit Event System, and a 32-bit Real-Time Clock. The 120-TFBGA package also provides excellent thermal dissipation and signal integrity at 120 MHz operation, while the SD/MMC host interface enables external storage for logging or display buffer needs.
The architecture combines the ARM Cortex-M4F core with Microchip's peripheral-rich Atmel/Mchp IP blocks. Dual-panel Flash allows in-field updates without halting execution (live firmware upgrade) and ECC protects against single-bit memory faults - both important for functional-safety and IEC 60730 / IEC 61508-style designs. The Cortex-M4F FPU accelerates float math; paired with the included DSP instructions it can run audio codecs, sensor fusion, and small ML inference on-device without offloading to a host.
Typical applications include industrial HMI panels, USB-based data loggers, motor control with FOC loops, connected sensor hubs, and consumer audio products. The 120 MHz speed plus DSP makes it suitable for real-time audio decoding and active-noise-cancelling headphone designs, while the high GPIO count fits multi-button white goods, HVAC controllers, and small home appliances.
When designing with the ATSAMD51P19A-CTUT, allocate at least one decoupling 100 nF + 1 uF per VDD pin pair, and route the 120-ball TFBGA BGA fan-out on inner layers with 0.4 mm pitch. The WLCSP/BGA package requires reflow profile per J-STD-020 (MSL-3 typically), and the Cortex-M4F vector table must be remapped in software after boot if the bootloader is moved to a different Flash region.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the standalone manufacturer datasheet or distributor catalog.
Drop-in alternatives for ATSAMD51P19A-CTUT — 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 ATSAMD51P19A-CTUT (same form factor and footprint) — differing in ADC, DAC, Operating Temperature, Core Architecture, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD51P20A-CTUT
✅ Drop-In✓ In Stock
$10.45 / Unit
View Datasheet →ATSAMD51P19A-CTUT-EFP
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →ATSAMD51N20A-AU
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.49 / Unit
View Datasheet →ATSAMD51P19A-CTFT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.85 / Unit
View Datasheet →ATSAME54P20A-CFN
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATSAMD51P19A-CTUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F (32-bit, with FPU and DSP) |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 512 KB (dual-panel, with ECC) |
| Operating Voltage (VDDIN) | 1.71 V to 3.63 V |
| I/O Voltage | 1.71 V to 3.63 V |
| GPIO Count | Up to 90 |
| Package | 120-ball TFBGA, 8x8 mm, 0.4 mm pitch |
| Operating Temperature | -40 C to +85 C (industrial) |
| ADC | 12-bit, up to 1 MSPS, up to 16 channels |
| DAC | 12-bit, 1 MSPS, up to 2 channels |
| USB | USB 2.0 Full-Speed device/host, with integrated PHY |
| Communication Peripherals | 6x SERCOM (UART/SPI/I2C), 2x I2S, 1x CAN-FD |
| Timers | 16-bit TC x9, 32-bit TCC x2, RTC with calendar |
| External Bus Interface | SDR QSPI / SMPS interface, SD/MMC host |
| Crypto / Integrity | Flash ECC, tamper detector, TrustZone-M not present on D51 |
| Mounting Type | Surface Mount (TFBGA) |
| RoHS Status | Compliant |
ATSAMD51P19A-CTUT 120-ball tfbga, 8x8 mm, 0.4 mm pitch Pin Configuration Guide
Pin configuration for ATSAMD51P19A-CTUT (120-ball tfbga, 8x8 mm, 0.4 mm pitch package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAMD51P19A-CTUT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAMD51P19A-CTUT is suitable for 6 applications: Industrial HMI / Touch-Screen Controller, USB Data Logger / Sensor Hub, Audio / DSP Processing Node, IoT / Connected Sensor Edge Node, Motor Control / FOC Drive, Portable Medical / Wellness Device.
Industrial HMI / Touch-Screen Controller
The ATSAMD51P19A-CTUT fits industrial HMI panels that need a Cortex-M4F to drive 480x320 TFT displays and respond to capacitive touch in under 50 ms. Its 120 MHz core with single-precision FPU performs render scrolling in real time while the integrated USB 2.0 FS device port enumerates as a HID/MSC composite for PC configuration. The 90 GPIO lines support the backlight PWM, capacitive touch I2C channel, and a CAN-FD bus to the main PLC. The 120-TFBGA package is compatible with the inner-layer fan-out used by most 4-layer HMI boards.
Recommended
USB Data Logger / Sensor Hub
In a USB-attached sensor hub, the ATSAMD51P19A-CTUT enumerates as a CDC + MSC composite device and streams ADC samples to a host while recording to SD card. The 512 KB Flash is enough to host a USB stack plus a small sensor-fusion algorithm. The 12-bit 1 MSPS ADC captures up to 16 analog channels, while the SERCOM ports fan out to SPI/I2C sensors. The 192 KB SRAM doubles as a USB ring buffer, dropping packets only at the USB Full-Speed bandwidth limit. No external USB PHY is needed thanks to the integrated transceiver.
Recommended
Audio / DSP Processing Node
Audio applications benefit from the ATSAMD51P19A-CTUT's Cortex-M4F DSP extensions. A 120 MHz M4F can decode 48 kHz / 24-bit MP3 or run a small ANC filter for headphones without offloading. The dual-panel 512 KB Flash holds both the bootloader and the codec firmware, and the I2S interfaces connect directly to external DACs. The 120-TFBGA 0.4 mm pitch layout keeps the analog/digital ground split short, which is essential for a 100+ dB SNR target. Use the Event System to sync I2S sample timing without CPU intervention.
Recommended
IoT / Connected Sensor Edge Node
The ATSAMD51P19A-CTUT serves as an edge node collecting sensor data, running inference locally, then transmitting via Wi-Fi or LoRa. Its Cortex-M4F runs small CNN or DSP models on streaming accelerometer data before wake-and-transmit. The SD/MMC host stores logs to removable cards, while SERCOM ports connect SPI sensors. The 1.71-3.63 V supply supports direct Li-Ion battery operation, and the low-power RTC lets the core sleep between sample bursts for years of battery life.
Recommended
Motor Control / FOC Drive
Three-phase FOC of a 1 kW BLDC motor benefits from the ATSAMD51P19A-CTUT's 120 MHz math headroom and 16-bit TCC timers with dead-time generators. The ADC sample-and-hold can be triggered from PWM edges for synchronous current sensing, and the Cortex-M4F runs the Park/Clarke transform with deterministic 12 us loop latency. The integrated CAN-FD lets the drive talk to a higher-level controller. 512 KB Flash holds the FOC library plus a small UI, while 192 KB SRAM hosts the speed/PI controller state.
Recommended
Portable Medical / Wellness Device
Portable medical devices such as pulse oximeters or handheld ECG monitors run on the ATSAMD51P19A-CTUT. The Cortex-M4F runs a real-time DSP heart-rate detection algorithm in <2 ms per sample, while the 12-bit ADC captures PPG or ECG signal at 1 MSPS. The SD/MMC host stores patient logs; the USB Full-Speed port recharges the battery and exports data to PC. The industrial -40C to +85C range supports medical device reliability requirements, and the Flash ECC prevents single-bit faults from corrupting long-term logs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD51P19A-CTUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD51P20A-CTUT | ATSAMD51P19A-CTUT-EFP | ATSAMD51P19A-CTFT | ATSAMD51N20A-AU | ATSAME54P20A-CFN |
|---|---|---|---|---|---|---|
| Package | 120-TFBGA (8x8 mm) | 120-TFBGA (8x8 mm) - same | 120-TFBGA (8x8 mm) - same | 120-TFBGA (8x8 mm) - same | 128-TQFP - different | 120-CFBGA - family |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | ARM Cortex-M4F | ARM Cortex-M4F - same | ARM Cortex-M4F - same | ARM Cortex-M4F - same | ARM Cortex-M4F - same | ARM Cortex-M4F - same |
| Maximum Clock Frequency | 120 MHz | 120 MHz - same | 120 MHz - same | 120 MHz - same | 120 MHz - same | 120 MHz - same |
| Flash Memory | 512 KB | 1 MB | 512 KB - same | 512 KB - same | 1 MB | 1 MB |
| Supply Voltage | 1.71 V to 3.63 V | 1.71 V to 3.63 V - same | 1.71 V to 3.63 V - same | 1.71 V to 3.63 V - same | 1.71 V to 3.63 V - same | 1.71 V to 3.63 V - same |
| GPIO Count (max) | 90 | 90 - same | 90 - same | 90 - same | 75 - less | 99 - more |
| USB | USB 2.0 FS device/host | USB 2.0 FS device/host - same | USB 2.0 FS device/host - same | USB 2.0 FS device/host - same | USB 2.0 FS device/host - same | USB 2.0 HS + FS |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Approx Unit Price (qty 1, as of 2026-09-21) | $9.85 | $11.50 | $10.20 | $9.95 | $11.10 | $13.40 |
Key Differentiators
- Dual-panel Flash with ECC for live firmware update and memory safety (vs ATSAMD51P19A-AU (TQFP package variant))
- Highest GPIO and peripheral count in the SAM D51 family (vs ATSAMD51J19A-MU (64-QFN package variant))
- Integrated Full-Speed USB device/host with on-chip PHY (vs ATSAME54P20A (adds High-Speed USB))
Design Notes
The ATSAMD51P19A-CTUT ships in a 120-ball 0.4 mm pitch TFBGA, so PCB fan-out requires inner-layer escape routing. Use a 0.8 mm via-in-pad with 0.4 mm drill for all BGA pads, and route signal traces on layer L3/L4 using 0.075 mm/0.15 mm trace/space. Microchip TB3155 documents a 6-layer stack-up with 1H TFBGA escape on L1/L3. Always include a 0.1 uF + 1 uF decoupling cap pair per VDD/VDDIO pair within 2 mm of the balls.
Estimated power consumption at 120 MHz core clock and full USB activity is ~80 mA from the VDDIN rail (per ASF Active Mode measurements). When designing the 3.3 V LDO upstream, size for 200 mA peak to handle in-rush during USB enumeration. VDDIN and VDDIO must be the same rail; a separate 1.8 V domain is allowed only for the I/O pad voltage divider interface.
Place the 16 MHz crystal within 3 mm of the XIN/XOUT balls with a ground guard ring. Keep the 32.768 kHz watch crystal close to its dedicated RTC pins. The USB D+/D- traces should be 45 ohm differential, length-matched within 2 mm, and routed over a continuous ground pour. The SD/MMC/SDR bus runs at 50 MHz - match lengths within 5 mm across 4-bit groups and via-stitch each side of the bus.
Common mistakes: leaving the SWDIO/SWDCLK pins floating (they must be pulled-up at reset or the debugger will not connect); not clearing the GPNVM bits after boot before enabling dual-bank Flash; using the slow 4 MHz internal RC as the USB clock source (must switch to 48 MHz PLL before enabling USB); forgetting to lock the Cortex-M4F vector table to the bootloader region before enabling the bootloader FUSE.
Estimated junction temperature rise at 80 mA core + IO load: with theta_JA = 28 C/W on a 4-layer JEDEC test board (per Microchip SAM D51 datasheet), the part dissipates roughly 0.27 W and the junction rises ~7.5 C above ambient. At -40 C ambient worst case industrial, the junction is still well inside the 125 C limit. Add a copper pour under the BGA to reduce theta_JA to ~15 C/W if you operate at 3.6 V ambient 85 C.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - automotive designs should select ATSAMx70 or ATSAMx54-Q1 variants. Halogen-free status not explicitly published.
