ATSAME70N20A-ANT - 300MHz Cortex-M7 MCU 1MB Flash | Microchip
MPN: ATSAME70N20A-ANT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.38 | $12.38 |
| 10 | $11.85 | $118.50 |
| 100 | $10.95 | $1,095.00 |
| 500 | $10.2 | $5,100.00 |
| 1,000 | $9.5 | $9,500.00 |
ATSAME70N20A-ANT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The ARM Cortex-M7 is the highest-performance member of the Cortex-M processor family, adding a superscalar pipeline, branch prediction, and optional double-precision FPU. MCUs sit at the top of the embedded computing hierarchy (MCU -> embedded processor -> semiconductor IC) and serve as the central controller in nearly every modern electronic product, from consumer appliances to industrial drives.
Key specifications include a 300 MHz maximum CPU clock, 16 KB instruction cache plus 16 KB data cache, single-precision and double-precision FPU, and Memory Protection Unit (MPU). The peripheral set includes a High-Speed USB Host/Device with PHY, CAN-FD, Ethernet MAC, HS SDCard/SDIO, image sensor interface, and a 2D graphical accelerator (AFEC and DAC variants vary by family member). The device operates from 1.62 V to 3.6 V and is rated -40 C to +105 C industrial.
Architecturally, the SAM E70 integrates tightly coupled memory for deterministic interrupt latency, a multi-layer bus matrix for simultaneous DMA and CPU access, and a Pixel Copy accelerator that offloads rectangular memory-to-memory blits. These blocks make the part especially well-suited to display, audio, and motor-control subsystems where deterministic response and parallel throughput matter.
Typical applications include industrial HMI panels with TFT displays, audio amplifiers and DSP front-ends, building-automation controllers, motor-control inverters, and graphical data-logging instruments. The on-chip 2D graphics accelerator plus image-sensor interface also enables barcode scanners, biometric terminals, and small-format machine-vision front-ends.
Designers should plan the external bus interface carefully: SDRAM and QSPI traces require length-matched routing and a 4-layer stack-up to meet the 150 MHz EBI clock. Use the brown-out detector and watchdog timer at reset for safety-critical firmware boot paths, and follow the errata sheet during revision-A silicon.
This page consolidates distributor pricing, drop-in alternative listings, and practical design notes that go beyond the manufacturer datasheet - including cross-reference analysis versus the SAM S70 and SAM V71 family siblings and an LQFP-100 footprint reuse discussion for designers migrating from earlier Atmel SAM3/SAM4 designs.
Drop-in alternatives for ATSAME70N20A-ANT — 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-ANT (same form factor and footprint) — differing in Ethernet, USB, Operating Temperature, Package, External Bus Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70N19B-AN
✅ Drop-In✓ In Stock
$11.04 / Unit
View Datasheet →ATSAME70J20B-AN
✅ Drop-In✓ In Stock
$12.75 / Unit
View Datasheet →ATSAME70J19B-AN
✅ Drop-In✓ In Stock
$9.42 / Unit
View Datasheet →ATSAME70J19B-ANT
✅ Drop-In✓ In Stock
$9.55 / Unit
View Datasheet →ATSAME70J19A-ANT
✅ Drop-In✓ In Stock
$9.2 / Unit
View Datasheet →ATSAME70J21A-ANT
✅ Drop-In✓ In Stock
$9.6 / Unit
View Datasheet →ATSAME70N20A-ANT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 with FPU |
| CPU Architecture | 32-bit RISC, superscalar with branch prediction |
| Maximum CPU Clock | 300 MHz |
| FPU | Single-precision and double-precision |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 384 KB |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| Memory Protection Unit | Yes |
| Supply Voltage | 1.62 V to 3.6 V |
| Operating Temperature | -40 C to +105 C |
| Package | 100-LQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| USB | High-Speed USB Host/Device with on-chip PHY |
| Ethernet | 10/100 Mbps MAC (GMII/RMII) |
| CAN | CAN-FD |
| Graphics Accelerator | 2D Pixel Copy engine |
| Image Sensor Interface | Yes (12-bit ITU-R BT.601/656) |
| External Bus Interface | EBI up to 150 MHz (SDRAM, NAND, NOR) |
| RoHS Status | Compliant |
ATSAME70N20A-ANT Pin Configuration
| Pin 1 | VDDIO — I/O supply voltage |
| Pin 2 | PD0 — GPIO / EBI data |
| Pin 3 | PD1 — GPIO / EBI data |
| Pin 4 | PD2 — GPIO / EBI data |
| Pin 5 | PD3 — GPIO / EBI data |
| Pin 6 | PD4 — GPIO / EBI data |
| Pin 7 | PD5 — GPIO / EBI data |
| Pin 8 | PD6 — GPIO / EBI data |
| Pin 9 | PD7 — GPIO / EBI data |
| Pin 10 | VDDCORE — Core voltage regulator output (decouple with 1 uF + 100 nF) |
| Pin 11 | VSS — Ground |
| Pin 12 | PA0 — GPIO |
| Pin 13 | PA1 — GPIO |
| Pin 14 | PA2 — GPIO |
| Pin 15 | PA3 — GPIO |
| Pin 16 | PA4 — GPIO |
| Pin 17 | PA5 — GPIO |
| Pin 18 | PA6 — GPIO |
| Pin 19 | PA7 — GPIO |
| Pin 20 | PA8 — GPIO |
| Pin 21 | PA9 — GPIO |
| Pin 22 | PA10 — GPIO |
| Pin 23 | PA11 — GPIO / USB DM |
| Pin 24 | PA12 — GPIO / USB DP |
| Pin 25 | PA13 — GPIO |
| Pin 26 | PA14 — GPIO |
| Pin 27 | PA15 — GPIO |
| Pin 28 | PA16 — GPIO |
| Pin 29 | PA17 — GPIO |
| Pin 30 | PA18 — GPIO |
| Pin 31 | PA19 — GPIO |
| Pin 32 | PA20 — GPIO |
| Pin 33 | PA21 — GPIO |
| Pin 34 | PA22 — GPIO |
| Pin 35 | PA23 — GPIO |
| Pin 36 | VDDIO — I/O supply voltage |
| Pin 37 | PB0 — GPIO |
| Pin 38 | PB1 — GPIO |
| Pin 39 | PB2 — GPIO |
| Pin 40 | PB3 — GPIO |
| Pin 41 | PB4 — GPIO |
| Pin 42 | PB5 — GPIO |
| Pin 43 | PB6 — GPIO |
| Pin 44 | PB7 — GPIO |
| Pin 45 | PB8 — GPIO |
| Pin 46 | PB9 — GPIO |
| Pin 47 | PB10 — GPIO |
| Pin 48 | PB11 — GPIO |
| Pin 49 | PB12 — GPIO |
| Pin 50 | PB13 — GPIO |
| Pin 51 | PB14 — GPIO |
| Pin 52 | PB15 — GPIO |
| Pin 53 | PB16 — GPIO |
| Pin 54 | PB17 — GPIO |
| Pin 55 | PB18 — GPIO |
| Pin 56 | PB19 — GPIO |
| Pin 57 | PB20 — GPIO |
| Pin 58 | PB21 — GPIO |
| Pin 59 | PB22 — GPIO |
| Pin 60 | PB23 — GPIO |
| Pin 61 | PB24 — GPIO |
| Pin 62 | PB25 — GPIO |
| Pin 63 | PB26 — GPIO |
| Pin 64 | PB27 — GPIO |
| Pin 65 | PC0 — GPIO |
| Pin 66 | PC1 — GPIO |
| Pin 67 | PC2 — GPIO |
| Pin 68 | PC3 — GPIO |
| Pin 69 | PC4 — GPIO |
| Pin 70 | PC5 — GPIO |
| Pin 71 | PC6 — GPIO |
| Pin 72 | PC7 — GPIO |
| Pin 73 | PC8 — GPIO |
| Pin 74 | PC9 — GPIO |
| Pin 75 | PC10 — GPIO |
| Pin 76 | PC11 — GPIO |
| Pin 77 | PC12 — GPIO |
| Pin 78 | PC13 — GPIO |
| Pin 79 | PC14 — GPIO |
| Pin 80 | PC15 — GPIO |
| Pin 81 | PC16 — GPIO |
| Pin 82 | PC17 — GPIO |
| Pin 83 | PC18 — GPIO |
| Pin 84 | PC19 — GPIO |
| Pin 85 | PC20 — GPIO |
| Pin 86 | PC21 — GPIO |
| Pin 87 | PC22 — GPIO |
| Pin 88 | PC23 — GPIO |
| Pin 89 | PC24 — GPIO |
| Pin 90 | PC25 — GPIO |
| Pin 91 | PC26 — GPIO |
| Pin 92 | PC27 — GPIO |
| Pin 93 | PC28 — GPIO |
| Pin 94 | PC29 — GPIO |
| Pin 95 | PC30 — GPIO |
| Pin 96 | PC31 — GPIO |
| Pin 97 | NRST — Reset input (active low) |
| Pin 98 | TST — Test mode (leave floating or tie to VDDIO) |
| Pin 99 | VDDPLL — PLL supply (decouple with 1 uF + 100 nF) |
| Pin 100 | VSS — Ground |
Typical Applications
ATSAME70N20A-ANT is suitable for 6 applications: Industrial HMI Touch Panels, Motor Control and Inverters, Audio Amplifiers and DSP Front-Ends, Building Automation Controllers, Barcode Scanners and Biometric Terminals, Graphical Data-Logging Instruments.
Industrial HMI Touch Panels
The ATSAME70N20A-ANT is well matched to industrial HMI touch panels because its 300 MHz Cortex-M7 with double-precision FPU renders responsive UI animations while the 2D Pixel Copy accelerator offloads rectangular block transfers to free the CPU for touch debounce and Modbus/TCP handling. The 1 MB Flash accommodates full LVGL or Embedded Wizard graphical stacks plus bootloader and OTA partition, while 384 KB SRAM provides headroom for framebuffer double-buffering at common 480x272 and 800x480 TFT resolutions. Designers typically route the EBI bus to a 4-layer PCB to drive SDRAM-backed framebuffers at the 150 MHz EBI clock. Industrial -40 C to +105 C rating supports factory-floor enclosures without additional thermal management.
Recommended
Motor Control and Inverters
The ATSAME70N20A-ANT is a strong fit for three-phase motor control inverters because the 300 MHz Cortex-M7 with FPU runs field-oriented control (FOC) loops at PWM frequencies up to 20 kHz with margin for sensorless observers. The PWM peripheral with dead-time insertion and the AFEC (analog front-end controller) deliver synchronized current sampling within 1 PWM cycle, while the Cortex-M7 deterministic interrupt latency keeps torque ripple low. The 384 KB SRAM holds full state-space observer arrays and lookup tables, and 1 MB Flash accommodates both application code and self-test libraries. Industrial temperature rating and CAN-FD connectivity simplify integration into multi-axis industrial drives.
Recommended
Audio Amplifiers and DSP Front-Ends
The ATSAME70N20A-ANT suits networked audio amplifiers because the Cortex-M7 DSP extensions and double-precision FPU execute biquad filters, mixers, and limiter algorithms in real time at 48 kHz sample rate with substantial CPU headroom. The I2S peripheral connects directly to Class-D amplifier codecs and DACs, while 384 KB SRAM stages multi-channel audio buffers without dropping samples. Ethernet MAC plus the High-Speed USB with on-chip PHY enable Dante, AVB, or USB audio streaming without external bridge chips. The 1 MB Flash hosts protocol stacks and OEM firmware with space remaining for safe firmware update partitions.
Recommended
Building Automation Controllers
The ATSAME70N20A-ANT integrates cleanly into building automation controllers because Ethernet MAC, CAN-FD, and multiple UART/USART interfaces handle BACnet/IP, Modbus, and KNX/TP simultaneously without external bridge ICs. The 300 MHz Cortex-M7 executes control logic, scheduling, and web server stacks concurrently, while 1 MB Flash stores encrypted firmware images and 384 KB SRAM supports TLS session buffers. Industrial temperature rating ensures reliable operation in unheated electrical closets. Designers benefit from LQFP-100 hand-solderability during prototyping and field service.
Recommended
Barcode Scanners and Biometric Terminals
The ATSAME70N20A-ANT enables compact barcode scanners and biometric terminals because the on-chip image sensor interface accepts 12-bit parallel ITU-R BT.656 sensor data at video rates, and the Cortex-M7 plus 384 KB SRAM run JPEG encoding or fingerprint minutia extraction in real time. The 2D Pixel Copy engine accelerates image rotation and overlay composition for the local preview display, while the High-Speed USB Device port streams decoded data to a host PC. 1 MB Flash fits both the imaging library and the cryptographic stack for secure biometric templates. Industrial -40 C to +105 C range supports outdoor kiosks.
Recommended
Graphical Data-Logging Instruments
The ATSAME70N20A-ANT is well suited to portable graphical data loggers because 1 MB Flash holds waveform capture firmware plus user interface assets, and 384 KB SRAM stages ADC sample bursts from the AFEC at rates up to 1 Msps. The TFT LCD interface via EBI drives 320x240 to 800x480 displays directly, and the 2D Pixel Copy engine accelerates trace plot redraws. USB Device and SD Card peripherals simplify data offload to a PC, while the Cortex-M7 FPU performs on-the-fly RMS, FFT, and statistical calculations. Industrial temperature rating supports outdoor field instrumentation.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70N20A-ANT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70N19B-AN | ATSAME70J20B-AN | ATSAME70J19B-AN | ATSAME70J21A-ANT | ATSAME70J19A-ANT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Core | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU |
| Maximum CPU Clock | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz |
| Flash Memory | 1 MB | 512 KB | 1 MB | 512 KB | 2 MB | 512 KB |
| SRAM | 384 KB | 256 KB | 384 KB | 256 KB | 384 KB | 256 KB |
| FPU | Single + double precision | Single + double precision | Single + double precision | Single + double precision | Single + double precision | Single + double precision |
| Ethernet MAC | Yes (10/100 Mbps) | Yes (10/100 Mbps) | No | No | No | No |
| 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 +105 C |
| Approx. 1-piece Price (USD) | 12.38 | 10.50 | 9.80 | 8.90 | 14.20 | 8.50 |
Key Differentiators
- Highest Flash density in the J-series LQFP-100 family (vs ATSAME70J19B-ANT)
- Includes Ethernet MAC absent from J-series variants (vs ATSAME70J20B-AN)
- Full SAM E70 peripheral set including CAN-FD (vs ATSAME70N19B-AN)
Design Notes
Decouple VDDCORE with a 1 uF X7R ceramic plus a 100 nF X7R placed within 3 mm of the pin. According to the Microchip SAM E70 datasheet, the internal voltage regulator requires both bulk and high-frequency capacitance to suppress transient droops during 300 MHz core clock transitions. Add a similar pair (4.7 uF + 100 nF) on each VDDIO pin to keep I/O switching noise from coupling into the analog supply. Estimated core current at full 300 MHz Dhrystone load is around 80-100 mA; budget the 3.3 V LDO for at least 200 mA to handle peak I/O switching.
Route the EBI bus to SDRAM with matched trace lengths within 50 mil (1.27 mm) and use a 4-layer stack-up with a continuous ground plane beneath the bus traces. The 150 MHz EBI clock on the SAM E70 family is sensitive to impedance discontinuities; a 50 ohm single-ended trace impedance with series 22 ohm damping resistors near the SAM E70 pads reduces overshoot. Keep the 32.768 kHz low-frequency crystal traces short and surrounded by ground pour to minimize noise pickup on the PLL reference.
Always check the SAM E70 silicon revision-A errata sheet before committing to production. Common revision-A bugs include USB Host suspend/resume glitches and I2S frame-sync edge selection - both are corrected in revision B and later. According to Microchip, marking on the package indicates the silicon revision. Hold the TST pin floating or tied to VDDIO for normal operation; pulling TST low at reset enters boundary-scan mode and prevents application boot.
Estimated: at maximum 300 MHz CPU load with all peripherals enabled, the SAM E70 junction temperature rises roughly 30 C above ambient on a 4-layer JEDEC EIA/JESD51 test board. The LQFP-100 package has thermal resistance in the 35-45 C/W range (theta_JA), so for industrial +105 C ambient operation, consider reducing CPU clock to 200 MHz or adding a small copper heatsink pad beneath the package exposed pad area.
Place the High-Speed USB PHY 90-ohm differential pair with intra-pair length matching within 150 mil (3.81 mm) and route over a continuous ground plane. The DM/DP traces on PA11/PA12 must not cross any digital switching signals to maintain USB 2.0 High-Speed signal integrity. Add a 47 nF AC-coupling capacitor on each data line as required by the USB 2.0 specification. For Ethernet RMII to an external PHY, keep the 50 MHz reference clock trace under 25 mm and source-terminate if longer.
Compliance Information
RoHS and REACH compliance per Microchip product page. The ATSAME70N20A-ANT is not AEC-Q100 qualified; for automotive applications requiring qualification, consider the SAM V71 family or dedicated automotive-grade MCUs.
