ATSAME51J20A-MU - 120MHz Cortex-M4F MCU, 1MB Flash, 64-VQFN | Microchip
Référence : ATSAME51J20A-MU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $11.5 | $11,50 |
| 10 | $10.4 | $104,00 |
| 100 | $9.25 | $925,00 |
| 500 | $8.4 | $4 200,00 |
| 1 000 | $7.65 | $7 650,00 |
ATSAME51J20A-MU Présentation
What is a Cortex-M4F microcontroller? A Cortex-M4F MCU is a 32-bit processor core based on the ARMv7-M architecture with a hardware single-precision Floating Point Unit and a DSP instruction set extension. Within the embedded hierarchy it sits between Cortex-M3 (no FPU) and Cortex-M7 (higher performance, double-precision FPU), and it serves as the workhorse core for industrial control, motor drives, audio processing, and connected IoT endpoints where deterministic interrupt response and floating-point math are both required.
Key features of the ATSAME51J20A-MU include a 120 MHz core with 2.14 CoreMark/MHz efficiency, 1 MB dual-panel Flash supporting live in-field updates, 256 KB SRAM, a high-speed 16-channel 1 Msps 12-bit ADC, two 12-bit DACs, USB 2.0 Full-Speed with embedded Host, a CAN-FD controller, SERCOM (configurable serial) interfaces, and an on-board crypto accelerator supporting AES, SHA and TRNG. The integrated 32-channel EVENT system and SmartEEPROM emulation reduce software overhead.
Architecturally the device is built around a multi-bus AHB matrix with dedicated SRAM and Flash ports, enabling zero-wait-state execution from Flash at full clock speed. The peripheral DMA controller (DMAC) and dedicated crypto DMA relieve the core from data-movement tasks, and the dual-panel Flash allows read-while-write firmware upgrades without external memory. The 9x9 mm 64-VQFN with exposed thermal pad supports industrial ambient operation from -40 °C to +85 °C.
Typical applications include industrial control and Human-Machine Interface (HMI) panels, USB-to-CAN bridges, sensor aggregation nodes, motor control low-end FOC loops, audio front-ends, and connected IoT edge nodes using the integrated crypto block. With USB, CAN-FD, and SERCOM, the same silicon serves as a protocol-conversion gateway between legacy RS-485 and modern fieldbus networks.
Designers should pay attention to decoupling: place one 100 nF X7R plus one 10 µF bulk capacitor on each VDD/VDDIO pin pair within 3 mm of the pad, and stitch the exposed pad with at least nine thermal vias to a continuous inner-plane ground for optimal 120 MHz operation. Because the SAM E51 family is footprint-compatible with the SAM D51 family, you can scale memory between 256 KB and 1 MB without PCB rework.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM E5x family, and practical PCB layout notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour ATSAME51J20A-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 ATSAME51J20A-MU (même facteur de forme et même empreinte) — différant par Package, ADC, Operating Temperature, DAC, SRAM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAME51J20A-MU-EFP
✅ Remplacement direct✓ En stock
$5.34 / unité
Voir la fiche technique →ATSAME51J19A-MU
✅ Remplacement direct✓ En stock
$4.65 / unité
Voir la fiche technique →ATSAME51J18A-MU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMD51J20A-MU
✅ Remplacement direct✓ En stock
$4.75 / unité
Voir la fiche technique →ATSAME53J20A-MU
✅ Remplacement direct✓ En stock
$7.48 / unité
Voir la fiche technique →ATSAME51N20A-AU-EFP
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$8.1 / unité
Voir la fiche technique →ATSAME51J20A-MU Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M4F with single-precision FPU |
| Fréquence d'horloge maximale | 120 MHz |
| CoreMark Efficiency | 2.14 CoreMark/MHz |
| Flash Memory | 1 MB (1M x 8) dual-panel with ECC |
| SRAM | 256 KB |
| ADC | 16-channel, 12-bit, 1 Msps |
| DAC | 2 x 12-bit |
| USB | USB 2.0 Full-Speed with embedded Host |
| CAN | CAN-FD controller |
| Crypto Accelerator | AES, SHA, TRNG |
| SERCOM | Configurable serial interfaces |
| EVENT System | 32 channels |
| Operating Voltage | 3.3 V |
| Boîtier | 64-VQFN (9x9 mm) with exposed pad |
| Température de fonctionnement | -40 °C to +85 °C |
| Type de montage | Surface Mount |
Configuration des broches de ATSAME51J20A-MU
| Broche 1 | VDDIO — Digital I/O supply |
| Broche 2 | PA00 — GPIO / SERCOM1[0] |
| Broche 3 | PA01 — GPIO / SERCOM1[1] |
| Broche 4 | PA02 — GPIO / ADC[0] |
| Broche 5 | PA03 — GPIO / ADC[1] |
| Broche 6 | PA04 — GPIO / VREFA |
| Broche 7 | PA05 — GPIO |
| Broche 8 | PA06 — GPIO |
| Broche 9 | PA07 — GPIO |
| Broche 10 | VDDIO — Digital I/O supply |
| Broche 11 | VSS — Ground |
| Broche 12 | PA08 — GPIO / SERCOM0[0] |
| Broche 13 | PA09 — GPIO / SERCOM0[1] |
| Broche 14 | PA10 — GPIO / SERCOM2[2] |
| Broche 15 | PA11 — GPIO / SERCOM2[3] |
| Broche 16 | PA12 — GPIO / SERCOM4[0] |
| Broche 17 | PA13 — GPIO / SERCOM4[1] |
| Broche 18 | PA14 — GPIO |
| Broche 19 | PA15 — GPIO |
| Broche 20 | PA16 — GPIO / SERCOM1[0] |
| Broche 21 | PA17 — GPIO / SERCOM1[1] |
| Broche 22 | PA18 — GPIO |
| Broche 23 | PA19 — GPIO |
| Broche 24 | VDDIO — Digital I/O supply |
| Broche 25 | PA20 — GPIO |
| Broche 26 | PA21 — GPIO |
| Broche 27 | PA22 — GPIO |
| Broche 28 | PA23 — GPIO |
| Broche 29 | PA24 — GPIO / USB_DM |
| Broche 30 | PA25 — GPIO / USB_DP |
| Broche 31 | PA26 — GPIO |
| Broche 32 | PA27 — GPIO |
| Broche 33 | PA28 — GPIO |
| Broche 34 | PA29 — GPIO |
| Broche 35 | PA30 — GPIO |
| Broche 36 | PA31 — GPIO |
| Broche 37 | PB00 — GPIO |
| Broche 38 | PB01 — GPIO |
| Broche 39 | PB02 — GPIO / SERCOM5[0] |
| Broche 40 | PB03 — GPIO / SERCOM5[1] |
| Broche 41 | PB04 — GPIO / SERCOM3[0] |
| Broche 42 | PB05 — GPIO / SERCOM3[1] |
| Broche 43 | PB06 — GPIO |
| Broche 44 | PB07 — GPIO |
| Broche 45 | PB08 — GPIO |
| Broche 46 | PB09 — GPIO |
| Broche 47 | PB10 — GPIO |
| Broche 48 | PB11 — GPIO |
| Broche 49 | PB12 — GPIO |
| Broche 50 | PB13 — GPIO |
| Broche 51 | PB14 — GPIO |
| Broche 52 | PB15 — GPIO |
| Broche 53 | PC00 — GPIO |
| Broche 54 | PC01 — GPIO |
| Broche 55 | PC02 — GPIO |
| Broche 56 | PC03 — GPIO |
| Broche 57 | PC04 — GPIO |
| Broche 58 | PC05 — GPIO |
| Broche 59 | PC06 — GPIO |
| Broche 60 | PC07 — GPIO |
| Broche 61 | VDDIO — Digital I/O supply |
| Broche 62 | VSS — Ground |
| Broche 63 | VDD — Core supply |
| Broche 64 | RESETN — Reset (active low) |
Applications typiques
ATSAME51J20A-MU convient pour 6 applications: Industrial HMI Control Panels, USB-to-CAN Bridge Dongles, Sensor Aggregation Edge Nodes, Low-End FOC Motor Control, Audio Front-End Processing, Connected IoT Edge Nodes with Hardware Crypto.
Industrial HMI Control Panels
The ATSAME51J20A-MU's 120 MHz Cortex-M4F core, 1 MB dual-panel Flash, and 16-channel 12-bit ADC make it well matched to industrial Human-Machine Interface (HMI) panels that combine a touchscreen controller, multi-channel sensor readout, and CAN-FD fieldbus. The hardware FPU accelerates GUI rendering math and FFT-based signal conditioning on the same MCU. With USB, CAN-FD, and SERCOM, the panel can act as a protocol-conversion gateway between legacy RS-485 and modern fieldbus networks without an external bridge IC.
Recommandé
USB-to-CAN Bridge Dongles
The ATSAME51J20A-MU integrates both USB 2.0 Full-Speed with embedded Host and a CAN-FD controller, which lets one IC implement a complete USB-to-CAN bridge dongle for automotive diagnostics and industrial fieldbus tools. The 256 KB SRAM buffers high-throughput CAN-FD frames while USB traffic is serviced, and the hardware crypto block can authenticate diagnostic sessions. Compared to a two-chip USB-plus-CAN design, the SAM E51 reduces PCB area and BOM by at least one MCU plus a transceiver.
Recommandé
Sensor Aggregation Edge Nodes
For industrial IoT edge nodes aggregating multiple analog and digital sensors, the ATSAME51J20A-MU provides 16 channels of 12-bit ADC sampling at 1 Msps, plus SERCOM channels for I2C/SPI sensor expansion. The 32-channel EVENT system and DMAC offload routine data-movement tasks, freeing the Cortex-M4F for higher-level aggregation and edge analytics. With 1 MB Flash, the node can host a full TLS stack plus device-management firmware without external memory.
Recommandé
Low-End FOC Motor Control
Low-end Field-Oriented Control (FOC) loops for fans, pumps, and small BLDC drives fit comfortably in the ATSAME51J20A-MU thanks to its 120 MHz Cortex-M4F with hardware FPU and DSP extensions. The 16-channel 12-bit ADC samples three-phase currents simultaneously with hardware oversampling, and the EVENT system synchronizes ADC triggers to PWM edges with deterministic latency. Designers can run 8 kHz FOC loops while leaving CPU headroom for CAN-FD telemetry and USB commissioning on the same die.
Recommandé
Audio Front-End Processing
The ATSAME51J20A-MU's two 12-bit DACs, 120 MHz Cortex-M4F DSP extensions, and 256 KB SRAM are sufficient for audio front-end processing such as beamforming pre-processing, sample-rate conversion, and basic DSP filtering. The hardware FPU accelerates biquad and FFT routines while the 16-channel ADC handles multi-mic capture. Combined with the 1 MB Flash budget, designers can host full audio-pipeline firmware with comfortable headroom for future feature expansion.
Recommandé
Connected IoT Edge Nodes with Hardware Crypto
Connected IoT edge nodes benefit from the ATSAME51J20A-MU's hardware crypto accelerator (AES, SHA, TRNG), which offloads TLS handshake and authentication without burdening the Cortex-M4F core. The dual-panel Flash supports secure OTA firmware updates with rollback to the previous image if a new image fails to boot. USB, CAN-FD, and SERCOM give designers a single-chip secure gateway for industrial or building-automation deployments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAME51J20A-MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAME51J20A-MU-EFP | ATSAME51J19A-MU | ATSAMD51J20A-MU | ATSAME53J20A-MU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Core | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz |
| Flash Memory | 1 MB | 1 MB | 512 KB | 1 MB | 1 MB |
| SRAM | 256 KB | 256 KB | 192 KB | 256 KB | 256 KB |
| Hardware Crypto | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | No | AES/SHA/TRNG |
| USB | FS with embedded Host | FS with embedded Host | FS with embedded Host | FS with embedded Host | HS PHY + FS with embedded Host |
| CAN | CAN-FD | CAN-FD | CAN-FD | CAN-FD | CAN-FD |
| Extended Flash Performance | No | Yes | No | No | No |
Principaux différenciateurs
- Same-family drop-in scalability between 256 KB and 1 MB Flash (vs ATSAME51J19A-MU)
- Adds hardware crypto accelerator absent on SAM D51 (vs ATSAMD51J20A-MU)
- Cost-down versus SAM E53 when High-Speed USB PHY is not required (vs ATSAME53J20A-MU)
Notes de conception
Decoupling: place one 100 nF X7R plus one 10 µF bulk capacitor on each VDD/VDDIO pin pair within 3 mm of the pad. The exposed thermal pad must be stitched with at least nine thermal vias to a continuous inner-plane ground for reliable 120 MHz operation across -40 °C to +85 °C.
Crystal layout: route the 12 MHz external crystal traces symmetrically and keep them short; the SAM E51's PLL multiplies this clock to 120 MHz and noisy layouts will cause jitter or PLL unlock. Keep crystal traces away from switching DC-DC nodes and digital I/O edges.
Power sequencing: VDDIO must rise no later than VDD, and the RESETN pin must be held low until both rails are stable. Failing to observe sequencing can cause latch-up on the I/O cells during cold-start; refer to the SAM E51 datasheet power-up section for the timing diagram.
Informations de conformité
RoHS and REACH compliance per Microchip product page. Industrial-grade -40 °C to +85 °C operating range; AEC-Q100 is not applicable for non-automotive SKUs.
