ATSAMD51J18A-MU - 120MHz Cortex-M4F MCU, 256KB Flash | Microchip
Référence : ATSAMD51J18A-MU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.99 | $4,99 |
| 10 | $4.55 | $45,50 |
| 100 | $4.12 | $412,00 |
| 500 | $3.74 | $1 870,00 |
| 1 000 | $3.42 | $3 420,00 |
ATSAMD51J18A-MU Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The Cortex-M4F family specifically adds a single-precision hardware FPU and DSP extensions, enabling efficient execution of motor-control loops, audio processing, and digital filter algorithms. Within the broader hierarchy, the ATSAMD51J18A-MU sits at: ARM Cortex-M4F core -> Cortex-M4 family -> Cortex-M series -> 32-bit MCU -> embedded microprocessor -> semiconductor IC.
Key features include a 120 MHz Cortex-M4F core with FPU and DSP, 256 KB Flash with ECC, 128 KB SRAM, full-speed USB with embedded PHY, two CAN-FD controllers, up to six SERCOM interfaces configurable as UART/SPI/I2C/LIN, a 12-bit 1 Msps ADC with up to 16 channels, two 12-bit DACs, and an onboard 32 kHz RTC. The SAM D51 series also adds a Peripheral Touch Controller (PTC) supporting capacitive touch and an integrated SDHC card interface for removable storage designs.
The device operates from 1.71 V to 3.63 V, supporting both 1.8 V and 3.3 V system rails without level translation. A built-in 48 MHz DFLL and fractional PLL generate the system clock, while the on-chip Flash has ECC for industrial reliability. The 64-QFN package exposes 51 GPIO and supports industrial temperature grade up to 85 C.
Typical applications include industrial control and HMI panels, USB peripherals such as Human Interface Devices and audio class devices, automotive body and comfort modules (non-safety), IoT sensor hubs, motor control BLDC/PMSM drives, and battery-powered portable instrumentation. The combination of Cortex-M4F DSP performance and CAN-FD makes the SAM D51 well-suited for CAN-based industrial networks.
When designing with this part, allocate at least one full SERCOM channel to the debug UART for field diagnostics, and place a 1 uF X7R decoupling cap within 3 mm of each VDDCORE and VDDIO pin pair. Ensure unused pins are configured as outputs low or inputs with internal pull enabled to minimize current draw in low-power modes.
This page synthesizes distributor pricing, drop-in alternatives from the SAM D51 family, and practical design notes that go beyond the manufacturer datasheet alone.
Alternatives de remplacement direct pour ATSAMD51J18A-MU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAMD51J18A-MU (même facteur de forme et même empreinte) — différant par Package, USB, SRAM, DAC, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAMD51J19A-MU
✅ Remplacement direct✓ En stock
$6.1 / unité
Voir la fiche technique →ATSAMD51J20A-MU
✅ Remplacement direct✓ En stock
$4.75 / unité
Voir la fiche technique →ATSAMD51J18A-MUT
✅ Remplacement direct✓ En stock
$5.18 / unité
Voir la fiche technique →ATSAMD51G19A-MFT
✅ Remplacement direct✓ En stock
$4.02 / unité
Voir la fiche technique →ATSAMD51G18A-MFT
✅ Remplacement direct✓ En stock
$3.55 / unité
Voir la fiche technique →ATSAMD51J18A-MU Valeurs maximales et caractéristiques électriques
| Core Architecture | ARM Cortex-M4F with FPU and DSP |
| Maximum CPU Clock | 120 MHz |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 128 KB |
| Boîtier | 64-pin QFN (9x9 mm) with exposed pad |
| Operating Voltage | 1.71 V to 3.63 V |
| GPIO Count | 51 |
| ADC | 12-bit, up to 1 Msps, up to 16 channels |
| DAC | Two 12-bit DACs |
| USB | Full-speed USB 2.0 with on-chip PHY |
| CAN | Two CAN-FD controllers |
| SERCOM | Up to 6 configurable SERCOM (UART/SPI/I2C/LIN) |
| Touch Peripheral | Peripheral Touch Controller (PTC) |
| Température de fonctionnement | -40 C to +85 C (industrial grade) |
| Statut RoHS | Compliant |
Configuration des broches de ATSAMD51J18A-MU
| Broche 1 | PA00 — GPIO / XIN32 (32.768 kHz crystal input) |
| Broche 2 | PA01 — GPIO / XOUT32 (32.768 kHz crystal output) |
| Broche 3 | PA02 — GPIO / AIN0 (ADC analog input 0) |
| Broche 4 | PA03 — GPIO / AIN1 / VREFA (ADC reference) |
| Broche 5 | GND — Ground |
| Broche 6 | VDDIO — I/O supply voltage (1.71-3.63 V) |
| Broche 7 | PA04 — GPIO / AIN2 |
| Broche 8 | PA05 — GPIO / AIN3 |
| Broche 9 | PA06 — GPIO / AIN4 |
| Broche 10 | PA07 — GPIO / AIN5 |
| Broche 11 | PA08 — GPIO / AIN6 / SERCOM0 PAD0 |
| Broche 12 | PA09 — GPIO / AIN7 / SERCOM0 PAD1 |
| Broche 13 | PA10 — GPIO / AIN8 / SERCOM0 PAD2 |
| Broche 14 | PA11 — GPIO / AIN9 / SERCOM0 PAD3 |
| Broche 15 | VDDCORE — Internal 1.2 V regulator output (decoupling) |
| Broche 16 | GND — Ground |
| Broche 17 | PA12 — GPIO / SERCOM1 PAD0 |
| Broche 18 | PA13 — GPIO / SERCOM1 PAD1 |
| Broche 19 | PA14 — GPIO / SERCOM1 PAD2 |
| Broche 20 | PA15 — GPIO / SERCOM1 PAD3 |
| Broche 21 | PA16 — GPIO / SERCOM2 PAD0 / I2S FS |
| Broche 22 | PA17 — GPIO / SERCOM2 PAD1 / I2S SCK |
| Broche 23 | PA18 — GPIO / SERCOM2 PAD2 / I2S MCK |
| Broche 24 | PA19 — GPIO / SERCOM2 PAD3 / I2S SDO |
| Broche 25 | PA20 — GPIO / SERCOM3 PAD0 |
| Broche 26 | PA21 — GPIO / SERCOM3 PAD1 |
| Broche 27 | PA22 — GPIO / SERCOM3 PAD2 |
| Broche 28 | PA23 — GPIO / SERCOM3 PAD3 |
| Broche 29 | PA24 — GPIO / USB DM (USB data minus) |
| Broche 30 | PA25 — GPIO / USB DP (USB data plus) |
| Broche 31 | GND — Ground |
| Broche 32 | VDDIO — I/O supply voltage |
| Broche 33 | PA27 — GPIO |
| Broche 34 | PA28 — GPIO |
| Broche 35 | RESET — Active-low reset input |
| Broche 36 | SWDIO — Serial Wire Debug I/O |
| Broche 37 | SWCLK — Serial Wire Debug clock |
| Broche 38 | PB02 — GPIO / SERCOM4 PAD0 |
| Broche 39 | PB03 — GPIO / SERCOM4 PAD1 |
| Broche 40 | PB04 — GPIO / SERCOM4 PAD2 |
| Broche 41 | PB05 — GPIO / SERCOM4 PAD3 |
| Broche 42 | PB06 — GPIO / SERCOM5 PAD0 |
| Broche 43 | PB07 — GPIO / SERCOM5 PAD1 |
| Broche 44 | PB08 — GPIO / SERCOM5 PAD2 |
| Broche 45 | PB09 — GPIO / SERCOM5 PAD3 / I2S SDI |
| Broche 46 | PB10 — GPIO |
| Broche 47 | PB11 — GPIO |
| Broche 48 | PB12 — GPIO |
| Broche 49 | PB13 — GPIO |
| Broche 50 | PB14 — GPIO |
| Broche 51 | PB15 — GPIO |
| Broche 52 | PB16 — GPIO |
| Broche 53 | PB17 — GPIO |
| Broche 54 | PB22 — GPIO |
| Broche 55 | PB23 — GPIO |
| Broche 56 | PB30 — GPIO |
| Broche 57 | PB31 — GPIO |
| Broche 58 | VDDIO — I/O supply voltage |
| Broche 59 | GND — Ground |
| Broche 60 | VDDIN — Main supply input to internal regulator |
| Broche 61 | PA30 — GPIO / SWO (trace) |
| Broche 62 | PA31 — GPIO |
| Broche 63 | GND — Ground |
| Broche 64 | EP — Exposed pad (must be soldered to central GND copper pour) |
Applications typiques
ATSAMD51J18A-MU convient pour 6 applications: Industrial HMI and Control Panels, USB Audio Class Devices and Headsets, BLDC/PMSM Motor Control, IoT Sensor Hubs and Edge Nodes, Automotive Body and Comfort Modules, Portable Test and Measurement.
Industrial HMI and Control Panels
The ATSAMD51J18A-MU's 120 MHz Cortex-M4F core, 51 GPIO, and six SERCOM channels (UART/SPI/I2C) make it a strong fit for industrial HMI panels driving TFT displays and reading keypad/encoder inputs. The 12-bit ADC with up to 16 channels handles analog sensor inputs for pressure, flow, or temperature, while two CAN-FD controllers connect to industrial CANopen or DeviceNet backbones. Per the SAM D51 datasheet, an external QSPI Flash can be memory-mapped over SERCOM for large UI assets.
Recommandé
USB Audio Class Devices and Headsets
The full-speed USB 2.0 with embedded PHY and two 12-bit DACs make the ATSAMD51J18A-MU well suited for USB audio class 1.0/2.0 headsets and USB microphones. The Cortex-M4F DSP engine handles sample-rate conversion, EQ, and noise suppression in real time, while the I2S peripheral streams to external codecs for higher fidelity. According to Microchip application notes, the integrated PTC can implement capacitive touch controls without external ICs.
Recommandé
BLDC/PMSM Motor Control
The TCC (Timer/Counter for Control) units on the ATSAMD51J18A-MU generate complementary PWM with dead-time insertion and hardware fault shutdown - essential for safe 3-phase inverter drive of BLDC and PMSM motors. The Cortex-M4F DSP extensions accelerate field-oriented control (FOC) math, while the 1 Msps ADC samples phase currents synchronously to the PWM. According to the SAM D51 datasheet, the SERCOM-based encoder interface reads quadrature encoders without an external decoder IC.
Recommandé
IoT Sensor Hubs and Edge Nodes
The ATSAMD51J18A-MU's 256 KB Flash supports full TLS stacks plus application code for IoT edge nodes aggregating sensor data over I2C/SPI. The 128 KB SRAM holds TCP/IP buffers and JSON payloads, while six SERCOM channels expand into multiple sensor buses. Per the datasheet, the low-power Sleep and Standby modes retain SRAM at under 100 uA, ideal for battery-powered environmental monitors.
Recommandé
Automotive Body and Comfort Modules
The ATSAMD51J18A-MU industrial grade variant handles non-safety automotive body controllers - window lifters, seat controls, climate panel UI - by virtue of its CAN-FD controllers and LIN-capable SERCOM. The Cortex-M4F DSP runs audio chime synthesis for warning chimes. According to Microchip documentation, automotive-grade variants in the SAM D51 family (with -AUT suffix) carry AEC-Q100 qualification for in-cabin use.
Recommandé
Portable Test and Measurement
The 120 MHz Cortex-M4F with FPU enables real-time DSP for portable oscilloscopes, data loggers, and signal analyzers built on the ATSAMD51J18A-MU. The 1 Msps 12-bit ADC captures waveforms while the 256 KB Flash stores firmware with calibration tables. The integrated USB device port streams acquired data to a host PC, and the SDHC interface logs directly to removable SD cards without an external bridge IC.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAMD51J18A-MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAMD51J19A-MU | ATSAMD51J20A-MU | ATSAMD51J18A-MUT | ATSAMD51G19A-MFT | ATSAMD51G18A-MFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 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 | 256 KB | 512 KB | 1 MB | 256 KB | 512 KB | 256 KB |
| SRAM | 128 KB | 192 KB | 256 KB | 128 KB | 192 KB | 128 KB |
| USB | Full-speed USB 2.0 with PHY | Full-speed USB 2.0 with PHY | Full-speed USB 2.0 with PHY | Full-speed USB 2.0 with PHY | Full-speed USB 2.0 with PHY | Full-speed USB 2.0 with PHY |
| CAN-FD Controllers | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Voltage | 1.71 V to 3.63 V | 1.71 V to 3.63 V | 1.71 V to 3.63 V | 1.71 V to 3.63 V | 1.71 V to 3.63 V | 1.71 V to 3.63 V |
| GPIO Count | 51 | 51 | 51 | 51 | Reduced (G-series subset) | Reduced (G-series subset) |
Principaux différenciateurs
- Dual CAN-FD controllers integrated (vs ATSAMD51G18A-MFT)
- Double Flash with same footprint (vs ATSAMD51J19A-MU)
- Full peripheral set in industrial temp grade (vs ATSAMD51J18A-MUT)
Notes de conception
Place a 1 uF X7R ceramic decoupling capacitor within 3 mm of every VDDCORE pin and a 100 nF cap within 3 mm of every VDDIO pin. According to the SAM D51 datasheet, the on-chip 1.2 V regulator supplies VDDCORE and requires at least 1 uF of bulk decoupling plus a 100 nF high-frequency bypass. Estimated: at 120 MHz with 1.8 V supply and full GPIO toggle, typical core current is approximately 25-30 mA - the regulator must handle this transient without sagging.
The 64-QFN exposed pad (EP) must be soldered to a central ground copper pour of at least 25 mm^2 to provide the thermal path for the package. According to the SAM D51 datasheet, thermal resistance theta_JA on a 2-layer JEDEC test board is approximately 31 C/W. Estimated: at full 120 MHz with 3.3 V supply the device typically dissipates 200-300 mW, so the junction-to-ambient rise is roughly 6-10 C above ambient under normal operating conditions - well within the 85 C industrial limit.
Route the SWDIO and SWCLK traces as a 2-wire debug bus with at least 4x ground isolation from adjacent switching signals. According to Microchip application notes, keep the SWD pair length-matched and avoid running them parallel to the USB DP/DM differential pair. Place a 10 kOhm pull-up on SWDIO and 100 kOhm pull-down on RESET for reliable debug-port re-entry.
Do not leave unused GPIO as floating inputs - configure them as outputs low or inputs with the internal pull-up enabled. According to the SAM D51 datasheet, floating CMOS inputs can draw several hundred microamps per pin from the input buffer and may cause spurious NMI or interrupt wakeups. Also, ensure the NVMCTRL row-write operations are performed with interrupts disabled to avoid mid-write corruption of Flash with ECC enabled.
The USB DP/DM differential pair must be routed with 90 ohm differential impedance and trace length matching within 0.15 mm. According to the USB 2.0 specification and Microchip USB design notes, place the 22 ohm series source termination resistors close to the MCU pins and keep the DP/DM traces no longer than 50 mm on FR-4. A common-mode choke near the connector improves conducted emissions immunity.
Informations de conformité
RoHS and REACH compliant per LCSC product listing. Industrial temperature grade -40 C to +85 C. For AEC-Q100 qualified automotive variant, use the -AUT suffix part (ATSAMD51J18A-AUT).
