ATSAME70N20A-CNT - 300MHz Cortex-M7 MCU 1MB Flash | Microchip
MPN: ATSAME70N20A-CNT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.35 | $14.35 |
| 10 | $13.45 | $134.50 |
| 100 | $12.2 | $1,220.00 |
| 500 | $11.05 | $5,525.00 |
| 1,000 | $9.95 | $9,950.00 |
| 3,000 | $8.85 | $26,550.00 |
ATSAME70N20A-CNT Overview
An ARM Cortex-M7 MCU is a 32-bit microcontroller built around the ARM Cortex-M7 processor core, designed for deterministic real-time control combined with high-throughput signal processing. The Cortex-M7 sits at the top of the Cortex-M family, above Cortex-M4/M33, and offers a 6-stage superscalar pipeline, double-precision FPU, and tightly-coupled memory (TCM) for low-latency code execution. Microcontrollers such as the ATSAME70N20A-CNT function as the central processing unit in embedded systems, integrating CPU, memory, and peripherals on a single die.
Key features include a single-precision/double-precision FPU, 16 KB instruction cache and 16 KB data cache, tightly-coupled memory for time-critical routines, and a multi-layer bus matrix (AHB) capable of simultaneous peripheral DMA. The device integrates an extensive peripheral set including Ethernet MAC, USB 2.0 High-Speed PHY, CAN-FD, HS SDCard/eMMC interface, I2S audio, 12-bit 2 MSPS ADC, and motor-control PWM timers. Operating voltage is 1.62 V to 3.6 V core logic with separate 1.2 V internal regulator.
The architecture is built on a low-power CMOS process with multiple low-power modes (Sleep, Wait, Backup) and a fast wake-up controller. The integrated high-speed USB PHY eliminates external PHY components, while the 16-bit External Bus Interface (EBI) supports SRAM, NOR Flash, and SDRAM expansion up to 128 MB. A hardware cryptographic accelerator (TRNG, AES, SHA) is available on related variants.
Typical applications include industrial motor control (PMSM, BLDC, servo drives), graphical HMI panels with TFT LCD, automotive body and connectivity ECUs, IoT gateways with Ethernet/USB, audio processing equipment, and medical instrumentation requiring high computational throughput. The 300 MHz M7 core delivers 1500 CoreMark and 600 DMIPS, suitable for DSP-style workloads such as Kalman filtering and field-oriented control loops.
When designing with this MCU, plan for a 4-layer PCB with a solid ground pour under the TFBGA to manage thermal dissipation and signal-integrity on parallel bus interfaces. The high-speed USB traces require 90 ohm differential impedance and length matching within 150 mil. JTAG/SWD traces should be kept under 50 mm and isolated from switching power rails.
This page synthesizes distributor pricing, drop-in alternatives from the SAM E70 family, and practical PCB design guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATSAME70N20A-CNT — 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 ATSAME70N20A-CNT (same form factor and footprint) — differing in ADC, SRAM, Package, Operating Temperature, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70N20A-CN
✅ Drop-In✓ In Stock
$8.4 / Unit
View Datasheet →ATSAME70N20B-CNT
✅ Drop-In✓ In Stock
$10.5 / Unit
View Datasheet →ATSAME70N21A-CNT
✅ Drop-In✓ In Stock
$8.85 / Unit
View Datasheet →ATSAMS70N20B-CNT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMS70N21B-CN
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F769NIH6
✅ Drop-In✓ In Stock
$11.75 / Unit
View Datasheet →ATSAME70N20A-CNT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M7 with FPU (single + double precision) |
| Maximum Clock Frequency | 300 MHz |
| Core Performance | 1500 CoreMark / 600 DMIPS |
| Flash Memory | 1024 KB (1 MB) |
| SRAM | 384 KB |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| Tightly-Coupled Memory (TCM) | Yes (ITCM + DTCM) |
| Operating Voltage | 1.62 V to 3.6 V (core 1.2 V internal) |
| Package | 100-pin TFBGA (9x9 mm) |
| Operating Temperature | -40 C to +105 C (industrial) |
| Mounting Type | Surface Mount (Tape & Reel, CNT suffix) |
| Supply Voltage Range | 3.0 V to 3.6 V typical (VDDIO/VDDIN) |
| USB Interface | USB 2.0 High-Speed PHY integrated |
| Ethernet | 10/100 Mbps MAC (GMII/RMII/MII) |
| CAN Interface | CAN-FD x2 |
| ADC | 12-bit, up to 2 MSPS, 24 channels |
| External Bus Interface (EBI) | 16-bit, supports SRAM/SDRAM/NOR up to 128 MB |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
ATSAME70N20A-CNT 100-pin tfbga (9x9 mm) Pin Configuration Guide
Pin configuration for ATSAME70N20A-CNT (100-pin tfbga (9x9 mm) 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 ATSAME70N20A-CNT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAME70N20A-CNT is suitable for 6 applications: Industrial Motor Control (PMSM/BLDC), Graphical HMI with TFT LCD, Automotive Body and Connectivity ECU, Industrial IoT Gateway with Ethernet/USB, Audio Processing Equipment, Medical Instrumentation and Patient Monitoring.
Industrial Motor Control (PMSM/BLDC)
The ATSAME70N20A-CNT is well-suited for industrial PMSM, BLDC, and AC induction motor control applications requiring high-bandwidth field-oriented control (FOC) loops. The 300 MHz Cortex-M7 with single-cycle MAC and double-precision FPU executes complex control algorithms (Park/Clarke transforms, space-vector PWM, Kalman filters) within sub-microsecond cycle times, while the on-chip 12-bit 2 MSPS ADC with dual sample-and-hold enables simultaneous current sensing on two phases. Integrated PWM timers with 16-bit resolution support switching frequencies up to 100 kHz with center-aligned, complementary outputs and programmable dead-time insertion critical for three-phase inverter safety.
Recommended
Graphical HMI with TFT LCD
For graphical human-machine interface panels, the ATSAME70N20A-CNT's 16-bit External Bus Interface (EBI) connects directly to TFT LCD controllers or SDRAM, supporting displays up to WVGA (800x480) with hardware-accelerated 2D graphics. The 384 KB of SRAM combined with 128 MB external SDRAM expansion provides sufficient frame buffer memory, while the integrated USB 2.0 High-Speed and 10/100 Ethernet MAC enable connectivity for remote HMI panels. The 300 MHz M7 core renders emWin, TouchGFX, or LVGL interfaces at 60 fps without external graphics accelerators, reducing system BOM cost.
Recommended
Automotive Body and Connectivity ECU
The ATSAME70N20A-CNT operates over the -40 C to +105 C industrial temperature range and provides dual CAN-FD interfaces suitable for automotive body and gateway ECUs. Integrated USB High-Speed PHY and 10/100 Ethernet MAC support connectivity gateways bridging CAN, LIN, and IP networks. The Cortex-M7 core processes OSEK/ AUTOSAR stacks and security firmware, while hardware cryptographic accelerators (AES, SHA, TRNG on related variants) protect V2X communications. The device's 1 MB Flash supports bootloaders and secure firmware updates critical for automotive ECUs requiring ISO 26262 compliance flow.
Recommended
Industrial IoT Gateway with Ethernet/USB
The ATSAME70N20A-CNT's integrated 10/100 Ethernet MAC and USB 2.0 High-Speed PHY enable compact industrial IoT gateways without external PHY components. The Cortex-M7 core runs lightweight TCP/IP stacks (LwIP, CycloneTCP) and MQTT/CoAP application layers, while dual CAN-FD interfaces bridge to industrial fieldbus networks. With 384 KB SRAM and external SDRAM support via EBI, the device handles protocol translation, local data aggregation, and TLS-secured cloud connectivity for edge devices. The wide 1.62-3.6 V supply range tolerates industrial 24V rail transients with proper regulation.
Recommended
Audio Processing Equipment
For professional and prosumer audio equipment, the ATSAME70N20A-CNT's I2S peripheral supports multi-channel audio at 192 kHz sample rates, while the Cortex-M7 DSP extensions accelerate real-time audio processing (FFT, biquad filters, dynamics compression). The double-precision FPU maintains numerical accuracy for parametric EQ and crossover filter calculations, and 384 KB SRAM holds multiple audio buffers for low-latency processing. USB High-Speed Audio Class 2.0 compliance enables USB audio interface designs at 480 Mbps, while Ethernet supports Dante/AES67 networked audio transports for multi-channel installations.
Recommended
Medical Instrumentation and Patient Monitoring
The ATSAME70N20A-CNT's 12-bit 2 MSPS ADC with 24 channels acquires multi-lead ECG, EEG, and SpO2 signals in patient monitoring equipment, while the 300 MHz Cortex-M7 performs real-time DSP for heart-rate variability analysis, QRS detection, and noise filtering. The on-chip SRAM eliminates external memory access latency for time-critical signal processing, and hardware AES/SHA accelerators (on related variants) secure patient health information (PHI) per HIPAA requirements. The integrated USB and Ethernet enable connectivity to hospital information systems, while the wide operating temperature range supports portable bedside monitor designs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70N20A-CNT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70N20A-CN | ATSAME70N20B-CNT | ATSAME70N21A-CNT | ATSAMS70N20B-CNT | STM32F769NIH6 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 100-pin TFBGA (9x9 mm) | 100-pin TFBGA (9x9 mm) - same | 100-pin TFBGA (9x9 mm) - same | 100-pin TFBGA (9x9 mm) - same | 100-pin TFBGA (9x9 mm) - same | TFBGA-216 - different footprint |
| Core | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 216 MHz |
| Flash Memory | 1024 KB | 1024 KB | 1024 KB | 2048 KB | 1024 KB | 2048 KB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 512 KB |
| Ethernet MAC | 10/100 integrated | 10/100 integrated | 10/100 integrated | 10/100 integrated | Not integrated | 10/100 integrated |
| USB HS PHY | Integrated | Integrated | Integrated | Integrated | Integrated | Integrated |
| CAN-FD | 2x | 2x | 2x | 2x | 2x | 2x |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C |
Key Differentiators
- Highest clock frequency in Microchip Cortex-M7 family (vs ATSAME54N20A-AU)
- Integrated USB 2.0 High-Speed PHY eliminates external component (vs STM32F769NIH6)
- Dual CAN-FD interfaces for automotive networking (vs ATSAME70Q20B-CFN)
- 16-bit External Bus Interface supports SDRAM expansion (vs ATSAM4SD32C)
Design Notes
Estimated: the 100-pin TFBGA at 9x9 mm with 0.8 mm pitch requires a 4-layer PCB with 0.5 oz copper pours for thermal dissipation and ground reference. Place the MCU on the top layer with a continuous ground plane directly below for signal return paths. Decoupling capacitors should be placed within 3 mm of each power pin, using 100 nF X7R ceramic in 0402 size for high-frequency decoupling and 4.7 uF bulk ceramic for transient suppression.
The high-speed USB 2.0 differential pair (D+/D-) requires 90 ohm differential impedance with intra-pair length matching within 150 mil (3.8 mm). Trace width should be approximately 8 mil on a 0.2 mm dielectric stackup. Keep USB traces away from switching regulator inductors and high-current motor drive traces. Place the ESD protection diode within 5 mm of the USB connector and minimize stub lengths to preserve signal integrity at 480 Mbps.
Estimated: the ATSAME70N20A-CNT core draws approximately 200 mA at 300 MHz with all peripherals active. Use a switching regulator with 500 mA rating for VDDIN/VDDOUT, followed by a low-dropout (LDO) regulator for VDDIO. The internal 1.2 V core regulator requires a 4.7 uF bulk capacitor on VDDCORE with ESR below 50 milliohm. Place a ferrite bead on analog supply pins (VDDANA) to isolate from digital switching noise.
Do not exceed the absolute maximum 3.6 V on any I/O pin - level shifters are required for 5V peripherals. The TCM (ITCM/DTCM) memory regions must be explicitly enabled in startup code or firmware will execute from Flash with full cache misses. JTAG and SWD pin multiplexing (TCK/TMS/TDO/TDI on PA0-PA3) must be configured before debug access is possible. When migrating from ATSAM4S/E70 revision A to revision B, review errata documents for changed peripheral behavior.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - SAM E70 industrial variant; for AEC-Q100 automotive applications consider the ATSAMV71 family. Halogen-free per JEDEC JS709B definitions.
