ATSAME70N21B-AN - 300MHz Cortex-M7 MCU 2MB Flash | Microchip
Référence : ATSAME70N21B-AN ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.45 | $18,45 |
| 10 | $16.92 | $169,20 |
| 100 | $14.75 | $1 475,00 |
| 500 | $13.2 | $6 600,00 |
| 1 000 | $11.85 | $11 850,00 |
ATSAME70N21B-AN Présentation
An ARM Cortex-M7 microcontroller is a high-end 32-bit MCU core from Arm's Cortex-M family, designed for deterministic real-time control with DSP and SIMD capabilities. It sits above Cortex-M4 in the taxonomy: Cortex-M7 -> Cortex-M4 -> Cortex-M3 -> Cortex-M0, occupying the top tier of the mainstream MCU performance curve. It belongs to the broader category of embedded microcontrollers (MCU), within the integrated circuits hierarchy (MCU -> microcontroller -> semiconductor). SAME70 devices add high-speed peripherals including HS USB, Ethernet, CAN-FD, and image sensor interfaces, integrating them with the M7 core into a system-on-chip suitable for industrial, automotive aftermarket, and IoT gateway applications.
Key features include 2 MB Flash with ECC, 384 KB SRAM, dual 16-channel 12-bit 2 MSPS ADCs, high-speed USB with integrated PHY, 10/100 Ethernet MAC with 1588 PTP support, CAN-FD, up to 144 GPIO, and integrated image sensor interface (ISI). The device supports 1.62V to 3.6V core supply with separate I/O voltage domains and offers industrial-grade -40C to +85C operation. Hardware cryptographic accelerators (AES, TRNG) and secure boot features provide platform integrity.
The SAME70 architecture couples a 16 KB ICache and 16 KB DCache to the AXI bus, dramatically accelerating Flash execution and reducing wait states at 300 MHz. The peripheral DMA (PDMIC, XDMAC) supports scatter-gather transfers, while the Event System enables low-latency inter-peripheral signaling without CPU intervention. The Floating Point Unit is single and double precision IEEE 754 compliant, accelerating motor control and audio DSP math.
Typical applications include industrial motor drives, PLC controllers, IoT gateways with Ethernet, automotive aftermarket telematics, and high-resolution industrial imaging. Designers also deploy the ATSAME70N21B-AN in HVAC controllers, point-of-sale terminals, and medical instrumentation front-ends.
When designing with this MCU, ensure the 1.2V core rail is supplied by an LDO rated for at least 250 mA peak, and that decoupling is placed adjacent to every VDD pin. The high-speed USB and Ethernet PHYs require impedance-controlled routing and proper ground stitching for EMI compliance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including SAME70 family cross-references and bench-tested power consumption figures.
Alternatives de remplacement direct pour ATSAME70N21B-AN — 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 ATSAME70N21B-AN (même facteur de forme et même empreinte) — différant par ADC, Operating Temperature, Package, USB, SRAM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAME70N20A-AN
✅ Remplacement direct✓ En stock
$11.2 / unité
Voir la fiche technique →ATSAMV71Q21B-AN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMS70N20A-AN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAME70N21B-AN Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M7 with FPU |
| Fréquence d'horloge maximale | 300 MHz |
| CoreMark Performance | 1500 CoreMark |
| DMIPS Performance | 750 DMIPS |
| Program Flash Memory | 2 MB (2048 KB) |
| SRAM | 384 KB |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V |
| Supply Voltage (VDDCORE) | 1.2 V (typical) |
| Température de fonctionnement | -40 C to +85 C |
| Boîtier | 100-LQFP (14x14 mm) |
| Type de montage | Surface Mount |
| ADC | Dual 12-bit, 2 MSPS, up to 16 channels |
| Communication | HS USB, 10/100 Ethernet, CAN-FD, UART, SPI, TWI |
| Statut RoHS | Compliant |
Guide de configuration des broches du ATSAME70N21B-AN 100-lqfp (14x14 mm)
Configuration des broches du ATSAME70N21B-AN (boîtier 100-lqfp (14x14 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATSAME70N21B-AN.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATSAME70N21B-AN convient pour 8 applications: Industrial Motor Control Drives, IoT Edge Gateway with Ethernet, Automotive Aftermarket Telematics, Industrial Machine Vision Systems, PLC and Process Controllers, Medical Instrumentation Front-End, Audio DSP and Sound Processing, Robotics and Drone Flight Controllers.
Industrial Motor Control Drives
The ATSAME70N21B-AN fits industrial motor drives due to its 300 MHz Cortex-M7 performance with double-precision FPU, enabling field-oriented control (FOC) algorithms at switching frequencies up to 20 kHz with single-cycle math. Its dual 12-bit 2 MSPS ADCs simultaneously sample phase currents and DC bus voltage, while the built-in PWM timers deliver complementary outputs with hardware dead-time insertion. The 384 KB SRAM accommodates control loops plus telemetry logging without external memory.
Recommandé
IoT Edge Gateway with Ethernet
The ATSAME70N21B-AN powers IoT edge gateways thanks to its integrated 10/100 Ethernet MAC with hardware IEEE 1588 PTP timestamping, enabling sub-microsecond time synchronization for distributed sensor networks. The 2 MB Flash hosts full TLS-enabled TCP/IP stacks like lwIP or netX, while the 384 KB SRAM holds packet buffers and JSON parsing contexts. Its HS USB port connects to Wi-Fi or LTE modems for uplink, with CAN-FD bridging to industrial networks.
Recommandé
Automotive Aftermarket Telematics
The ATSAME70N21B-AN suits automotive telematics head units with CAN-FD supporting modern vehicle bus standards up to 5 Mbps, processing OBD-II and proprietary OEM payloads in real time. Its 300 MHz Cortex-M7 with 384 KB SRAM runs data logging, GPS fusion algorithms, and BLE/Wi-Fi gateway code on a single chip. Industrial -40C to +85C operation handles under-dash thermal environments; for AEC-Q100 needs use the V71Q21B variant.
Recommandé
Industrial Machine Vision Systems
The ATSAME70N21B-AN's integrated Image Sensor Interface (ISI) directly captures parallel camera streams up to WVGA resolution, while its 300 MHz Cortex-M7 with hardware SIMD performs edge detection, color conversion, and JPEG encoding at frame rates above 30 fps. The 384 KB SRAM doubles as a framebuffer, eliminating external SDRAM for cost-sensitive designs. Real-time Ethernet output streams results to PLC supervisors.
Recommandé
PLC and Process Controllers
Programmable Logic Controllers benefit from the ATSAME70N21B-AN's Cortex-M7 deterministic interrupt latency, hardware AES, and EtherCAT/Modbus/Profinet-capable Ethernet. Its 144 GPIO handles dozens of discrete I/O plus encoder inputs through the AFEC (analog front-end) channels and TC capture modules. The 2 MB Flash supports IEC 61131-3 runtime plus application ladder logic with 384 KB SRAM as working memory.
Recommandé
Medical Instrumentation Front-End
Medical devices such as portable patient monitors use the ATSAME70N21B-AN to interface with multiple ADCs and sensors while running signal conditioning, FFT analysis, and touchscreen UI concurrently. Its hardware AES plus TRNG supports HIPAA-compliant encryption of patient data at rest and in transit over Ethernet or USB. The Cortex-M7 DSP extensions accelerate biosignal filtering in patient-side firmware without external DSP chips.
Recommandé
Audio DSP and Sound Processing
Audio processors and smart speakers leverage the ATSAME70N21B-AN's double-precision FPU and SIMD DSP to run beamforming, noise cancellation, and parametric EQ on multiple microphone channels in real time. Its HS USB supports class-compliant USB audio, while S/PDIF or I2S peripherals interface with external DACs. The 384 KB SRAM buffers multi-channel audio streams at 48 kHz with low latency under 5 ms.
Recommandé
Robotics and Drone Flight Controllers
Drones and robotic platforms use the ATSAME70N21B-AN as the central flight/motion controller, processing 6-axis IMU data at 1 kHz with the Cortex-M7's hardware FPU running extended Kalman filter pose estimation. Its high-speed timers generate precise PWM at up to 24 MHz resolution for ESC motor control, while CAN-FD interfaces to companion boards like payload cameras or servos. Ethernet MAC enables telemetry downlink for high-bandwidth sensor data.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAME70N21B-AN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAME70N20A-AN | ATSAMV71Q21B-AN | ATSAMS70N20A-AN |
|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M7 300 MHz | ARM Cortex-M7 300 MHz | ARM Cortex-M7 300 MHz | ARM Cortex-M7 300 MHz |
| Flash Memory | 2 MB | 2 MB | 2 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB |
| Ethernet MAC | Yes (10/100, IEEE 1588) | Yes (10/100, IEEE 1588) | Yes (10/100, IEEE 1588) | No (no EMAC) |
| HS USB PHY | Yes (integrated) | Yes (integrated) | Yes (integrated) | No (no USB) |
| CAN-FD | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +105C (automotive) | -40C to +85C |
| AEC-Q100 | Not qualified | Not qualified | Qualified (automotive grade) | Not qualified |
Principaux différenciateurs
- Latest N21B silicon revision with CAN-FD (vs ATSAME70N20A-AN)
- Automotive AEC-Q100 qualification (vs ATSAMV71Q21B-AN)
- Integrated HS USB with PHY (vs ATSAMS70N20A-AN)
Notes de conception
Estimated: The ATSAME70N21B-AN draws approximately 200 mA peak at 300 MHz with all peripherals active, requiring a 1.2V LDO rated at least 250 mA on the VDDcore rail. Microchip recommends the MIC69502 or equivalent low-noise LDO with output tolerance under 2%. Decouple each VDDIO pin with 100 nF + 4.7 uF ceramic and provide bulk capacitance at the regulator output. Power-on reset requires VDDIO to ramp monotonically with no dropouts during MCU boot.
Use a 4-layer PCB with continuous ground plane directly under the 100-LQFP for thermal dissipation and signal reference. Route the HSUSB differential pair (D+/D-) with 90 ohm differential impedance, max length 50 mm, and avoid stubs. Place the 12 MHz crystal within 5 mm of XIN/XOUT pins with grounded guard traces. The image sensor interface data lines should be length-matched to within 1 mm across all 8/10/12 bits to prevent capture timing skew.
Keep the analog supply AVSS separately routed to a clean ground point, and isolate ADC reference decoupling on its own ground island connected at a single point to digital ground. The 100-LQFP exposed pad (if present, depends on package variant) should be soldered to a thermal pad with 9 thermal vias to inner ground plane for heatsinking at high ambient temperatures. Maintain 4 mm trace clearance between Ethernet magnetics and noisy switching nodes.
Do not enable the Brown-Out Detector (BOD) thresholds lower than 1.62V without ensuring the VDDIO regulator has adequate transient response. Programming via SWD requires the ERASE pin pulled high during reset to enter bootloader; forgetting this is a common bring-up issue. The N21B silicon revision has updated errata compared to N20A - consult DS80000721 before locking down firmware. The HSUSB VBUS pin needs 5V tolerant protection against shorts per USB 2.0 specification.
Informations de conformité
RoHS and REACH compliant per Microchip product declaration. Standard E70N21B is not AEC-Q100 - choose V71Q21B variant for automotive. Lead-free matte tin plating.
