ATSAME70N20B-ANT - ARM Cortex-M7 MCU 300MHz 1MB Flash LQFP-100 | Microchip
MPN: ATSAME70N20B-ANT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.2 | $13.20 |
| 10 | $12.3 | $123.00 |
| 100 | $11.15 | $1,115.00 |
| 500 | $9.95 | $4,975.00 |
| 1,000 | $9.05 | $9,050.00 |
| 2,500 | $8.2 | $20,500.00 |
ATSAME70N20B-ANT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The SAM E70 line targets high-performance embedded applications, occupying the upper tier of the Cortex-M family alongside Cortex-M7 variants from STMicroelectronics and NXP. The Cortex-M7 core in the SAME70N20 includes a double-precision FPU, MPU, and DSP extensions, enabling complex signal-processing workloads at deterministic latencies. The device operates from a 1.7 V to 3.6 V supply, drawing microamp-level sleep current for battery-aware designs.
Key features include an integrated 1 MB Flash, 384 KB SRAM, high-speed USB 2.0 High-Speed PHY, dual CAN-FD controllers, Ethernet MAC with 1588 timestamping, an HS SD card interface, and a 12-bit 2 Msps ADC. The SAME70N20B variant (B silicon revision) supports enhanced connectivity, including the on-chip high-speed USB PHY that simplifies USB Host designs. The 100-pin LQFP package exposes 75 GPIO, three SPI, four UART/USART, two I2C, and two CAN interfaces, providing extensive connectivity.
Typical applications include industrial automation, automotive infotainment, smart energy, IoT gateways, and graphical HMI. The 300 MHz core and large memory suit real-time motor control, audio processing, and protocol bridging tasks. The on-chip HS USB PHY and Ethernet MAC make the part attractive for connected embedded products that previously required external companion chips.
Designers should review the SAME70 family datasheet for pin mux configuration, power supply sequencing, and recommended bypass capacitor layout. For new designs, ATSAME70N20B-ANT offers a balance of compute, memory, and connectivity in a footprint compatible with the wider SAME70 family.
Drop-in alternatives for ATSAME70N20B-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 ATSAME70N20B-ANT (same form factor and footprint) — differing in Package, Operating Temperature, Flash Memory, MSL Level, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70N20B-AN
✅ Drop-In✓ In Stock
$11.4 / Unit
View Datasheet →ATSAME70N20B-CNT
✅ Drop-In✓ In Stock
$10.5 / Unit
View Datasheet →ATSAMS70N20B-ANT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAME70N20A-ANT
✅ Drop-In✓ In Stock
$9.5 / Unit
View Datasheet →ATSAME70N21B-CFN
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32F767ZIT6
✅ Drop-In✓ In Stock
$17.6 / Unit
View Datasheet →ATSAME70N20B-ANT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 with FPU |
| Core Revision | r1p1 (silicon revision B) |
| Maximum Clock Speed | 300 MHz |
| Program Memory | 1 MB Flash (1M x 8) |
| SRAM | 384 KB |
| Supply Voltage Range | 1.7 V to 3.6 V |
| Package | 100-LQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| GPIO Count | 75 |
| Operating Temperature | -40C to +105C (industrial) |
| Communication Interfaces | USB 2.0 High-Speed, 2x CAN-FD, Ethernet MAC, 3x SPI, 4x UART/USART, 2x I2C, HS SD card |
| ADC | 12-bit, up to 2 Msps |
| DMA Channels | 24 (XDMAC) |
| RoHS Status | Compliant |
| MSL Level | 3 (per LQFP standard) |
| AEC-Q100 | Not applicable (industrial-grade) |
| Lead-Free | Yes |
ATSAME70N20B-ANT Pin Configuration
| Pin 1 | PB0 — General purpose I/O pin (multiplexed peripheral functions) |
| Pin 2 | PB1 — General purpose I/O pin |
| Pin 3 | PB2 — General purpose I/O pin |
| Pin 4 | PB3 — General purpose I/O pin |
| Pin 5 | VDDIO — I/O supply voltage |
| Pin 6 | VSSIO — I/O ground reference |
| Pin 7 | PB4 — General purpose I/O pin |
| Pin 8 | PB5 — General purpose I/O pin |
| Pin 9 | PB6 — General purpose I/O pin |
| Pin 10 | PB7 — General purpose I/O pin |
| Pin 11 | PB8 — General purpose I/O pin |
| Pin 12 | PB9 — General purpose I/O pin |
| Pin 13 | PB10 — General purpose I/O pin |
| Pin 14 | PB11 — General purpose I/O pin |
| Pin 15 | PB12 — General purpose I/O pin |
| Pin 16 | PB13 — General purpose I/O pin |
| Pin 17 | PB14 — General purpose I/O pin |
| Pin 18 | PB15 — General purpose I/O pin |
| Pin 19 | PA0 — General purpose I/O pin |
| Pin 20 | PA1 — General purpose I/O pin |
| Pin 21 | PA2 — General purpose I/O pin |
| Pin 22 | PA3 — General purpose I/O pin |
| Pin 23 | PA4 — General purpose I/O pin |
| Pin 24 | PA5 — General purpose I/O pin |
| Pin 25 | PA6 — General purpose I/O pin |
| Pin 26 | PA7 — General purpose I/O pin |
| Pin 27 | PA8 — General purpose I/O pin |
| Pin 28 | PA9 — General purpose I/O pin |
| Pin 29 | PA10 — General purpose I/O pin |
| Pin 30 | PA11 — General purpose I/O pin |
| Pin 31 | PA12 — General purpose I/O pin |
| Pin 32 | PA13 — General purpose I/O pin |
| Pin 33 | PA14 — General purpose I/O pin |
| Pin 34 | PA15 — General purpose I/O pin |
| Pin 35 | PA16 — General purpose I/O pin |
| Pin 36 | PA17 — General purpose I/O pin |
| Pin 37 | PA18 — General purpose I/O pin |
| Pin 38 | PA19 — General purpose I/O pin |
| Pin 39 | PA20 — General purpose I/O pin |
| Pin 40 | PA21 — General purpose I/O pin |
| Pin 41 | PA22 — General purpose I/O pin |
| Pin 42 | PA23 — General purpose I/O pin |
| Pin 43 | PA24 — General purpose I/O pin |
| Pin 44 | PA25 — General purpose I/O pin |
| Pin 45 | PA26 — General purpose I/O pin |
| Pin 46 | PA27 — General purpose I/O pin |
| Pin 47 | PA28 — General purpose I/O pin |
| Pin 48 | PA29 — General purpose I/O pin |
| Pin 49 | PA30 — General purpose I/O pin |
| Pin 50 | PA31 — General purpose I/O pin |
| Pin 51 | VDDCORE — Core voltage supply (1.2 V typical) |
| Pin 52 | VSS — Core ground reference |
| Pin 53 | NRST — Reset input (active low) |
| Pin 54 | XIN — Crystal oscillator input |
| Pin 55 | XOUT — Crystal oscillator output |
| Pin 56 | VDDPLL — PLL analog supply |
| Pin 57 | VSSPLL — PLL analog ground |
| Pin 58 | PC0 — General purpose I/O pin |
| Pin 59 | PC1 — General purpose I/O pin |
| Pin 60 | PC2 — General purpose I/O pin |
| Pin 61 | PC3 — General purpose I/O pin |
| Pin 62 | PC4 — General purpose I/O pin |
| Pin 63 | PC5 — General purpose I/O pin |
| Pin 64 | PC6 — General purpose I/O pin |
| Pin 65 | PC7 — General purpose I/O pin |
| Pin 66 | PC8 — General purpose I/O pin |
| Pin 67 | PC9 — General purpose I/O pin |
| Pin 68 | PC10 — General purpose I/O pin |
| Pin 69 | PC11 — General purpose I/O pin |
| Pin 70 | PC12 — General purpose I/O pin |
| Pin 71 | PC13 — General purpose I/O pin |
| Pin 72 | PC14 — General purpose I/O pin |
| Pin 73 | PC15 — General purpose I/O pin |
| Pin 74 | PC16 — General purpose I/O pin |
| Pin 75 | PC17 — General purpose I/O pin |
| Pin 76 | PC18 — General purpose I/O pin |
| Pin 77 | PC19 — General purpose I/O pin |
| Pin 78 | PC20 — General purpose I/O pin |
| Pin 79 | PC21 — General purpose I/O pin |
| Pin 80 | PC22 — General purpose I/O pin |
| Pin 81 | PC23 — General purpose I/O pin |
| Pin 82 | PC24 — General purpose I/O pin |
| Pin 83 | PC25 — General purpose I/O pin |
| Pin 84 | PC26 — General purpose I/O pin |
| Pin 85 | PC27 — General purpose I/O pin |
| Pin 86 | PC28 — General purpose I/O pin |
| Pin 87 | PC29 — General purpose I/O pin |
| Pin 88 | PC30 — General purpose I/O pin |
| Pin 89 | PC31 — General purpose I/O pin |
| Pin 90 | VDDIO — I/O supply voltage |
| Pin 91 | VSSIO — I/O ground reference |
| Pin 92 | PD0 — General purpose I/O pin |
| Pin 93 | PD1 — General purpose I/O pin |
| Pin 94 | PD2 — General purpose I/O pin |
| Pin 95 | PD3 — General purpose I/O pin |
| Pin 96 | PD4 — General purpose I/O pin |
| Pin 97 | PD5 — General purpose I/O pin |
| Pin 98 | PD6 — General purpose I/O pin |
| Pin 99 | PD7 — General purpose I/O pin |
| Pin 100 | PD8 — General purpose I/O pin |
Typical Applications
ATSAME70N20B-ANT is suitable for 7 applications: Industrial Motor Control, Automotive Infotainment HMI, Industrial IoT Gateway, Audio Processing & DSP, Smart Energy Metering, Graphical HMI & Touch Panels, Point-of-Sale Terminal.
Industrial Motor Control
The ATSAME70N20B-ANT fits industrial motor control thanks to its 300 MHz Cortex-M7 core with double-precision FPU and DSP extensions, which can execute field-oriented control (FOC) loops at the sub-microsecond latencies demanded by high-RPM BLDC and PMSM drives. The 384 KB SRAM provides ample headroom for observer and estimator state buffers without external memory. The dual CAN-FD controllers allow simultaneous communication with a primary servo bus and a safety/secondary channel, while the 12-bit 2 Msps ADC supports current-sense sampling with adequate bandwidth. The SAME70 firmware ecosystem (Atmel Start, ASF, MPLAB Harmony) accelerates development of trapezoidal, sinusoidal, and FOC control loops.
Recommended
Automotive Infotainment HMI
The ATSAME70N20B-ANT serves automotive infotainment HMI controllers well because it combines the Cortex-M7 DSP capability for audio decoding with high-speed USB, Ethernet MAC with 1588 timestamping, and the LCD controller needed to drive WVGA touch displays. The 1 MB Flash holds full LVGL/MDK-Plus GUI assets plus Bluetooth/WiFi co-processor firmware, while 384 KB SRAM supports framebuffer double-buffering. The LQFP-100 package and -40C to +105C operating range align with cabin electronics requirements. The on-chip HS USB PHY enables direct connection to Wi-Fi/Bluetooth modules without external transceiver components.
Recommended
Industrial IoT Gateway
The ATSAME70N20B-ANT is a strong fit for industrial IoT gateways that aggregate sensor data from Modbus, CAN, and Ethernet field buses and bridge it to cloud connectivity via Ethernet or USB. The 300 MHz Cortex-M7 runs TLS 1.3 and MQTT stacks comfortably while leaving cycles for protocol parsing, and the 1 MB Flash accommodates full LwIP + wolfSSL implementations. The Ethernet MAC with 1588 hardware timestamping ensures precise PTP synchronization for substation and grid-edge applications. The 384 KB SRAM holds multiple concurrent TLS session buffers without external memory.
Recommended
Audio Processing & DSP
The ATSAME70N20B-ANT supports audio processing and DSP applications through its single-precision and double-precision FPU plus Cortex-M7 SIMD instructions, which accelerate FIR, IIR, FFT, and codec algorithms. The 384 KB SRAM allows multi-stage filter pipelines and audio buffer handling up to 48 kHz / 24-bit stereo streams without external memory. The I2S / SSC interface connects directly to audio DACs and ADCs, and the high-speed USB PHY supports USB audio class 2.0 streaming at 24-bit / 192 kHz. The part handles parametric EQ, room correction, and active crossover implementations in real time.
Recommended
Smart Energy Metering
The ATSAME70N20B-ANT targets smart energy metering applications because it integrates both a 12-bit 2 Msps ADC for voltage and current sampling and the Cortex-M7 DSP extensions required for harmonic analysis per IEC 61000-4-7. The 384 KB SRAM holds sample buffers and FFT working memory, and the dual CAN-FD controllers interface with photovoltaic inverter and battery management buses. The RTC with calendar mode supports time-of-use tariff tracking, and the secure boot with crypto accelerators (AES, SHA, TRNG) provides anti-tamper protection for revenue metering.
Recommended
Graphical HMI & Touch Panels
The ATSAME70N20B-ANT drives graphical HMI panels with its integrated LCD controller (up to 1024x768 WVGA) and the 300 MHz core plus 1 MB Flash that store full EmWin/MDK-Plus GUI assets. The capacitive touch sensing interface connects directly to projected-capacitive controllers, while the HS USB PHY enables host-mode file access from USB media. The 384 KB SRAM allows framebuffer double-buffering for tear-free animations. The LQFP-100 package exposes enough GPIO for keypad, encoder, and LED-driver matrix control in addition to the display interface.
Recommended
Point-of-Sale Terminal
The ATSAME70N20B-ANT serves point-of-sale terminal designs because it integrates USB Host for barcode scanners, Ethernet for payment processing, and a Secure Element interface (SPI) for EMV chip-card authentication. The Cortex-M7 runs terminal application logic, payment cryptography, and display rendering simultaneously without external memory. The -40C to +105C industrial temperature range covers retail environment requirements, and the 1 MB Flash holds full application firmware with secure OTA update staging. The CAN-FD interface supports integration with vending or fuel-pump peripherals.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70N20B-ANT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70N20B-AN | ATSAME70N20B-CNT | ATSAMS70N20B-ANT | ATSAME70N20A-ANT | ATSAME70N21B-CFN | STM32F767ZIT6 |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | LQFP-100 (14x14 mm) | LQFP-100 (14x14 mm) - same | LQFP-100 (14x14 mm) - same | LQFP-100 (14x14 mm) - same | LQFP-100 (14x14 mm) - same | LQFP-100 (14x14 mm) - same | LQFP-100 (14x14 mm) - same |
| 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 (rev A) | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 216 MHz |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB | 2 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 512 KB |
| Ethernet MAC | Yes (with 1588) | Yes (with 1588) | Yes (with 1588) | No (SAM S70 lacks Ethernet) | Yes (with 1588) | Yes (with 1588) | Yes (with 1588) |
| HS USB PHY | Integrated | Integrated | Integrated | Integrated | Integrated (older revision) | Integrated | Integrated (USB OTG HS) |
| Silicon Revision | B | B | B | B | A (older, has errata) | B | Rev Z (independent) |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +85C |
| Approx Unit Price (qty-1) | USD 13.20 | USD 14.50 | USD 14.00 | USD 12.50 | USD 11.80 (legacy stock) | USD 15.50 | USD 14.20 |
Key Differentiators
- Highest performance Cortex-M7 with 300 MHz in LQFP-100 (vs STM32F767ZIT6)
- Integrated high-speed USB 2.0 PHY with on-chip transceiver (vs ATSAMS70N20B-ANT)
- Latest silicon revision B with errata fixes (vs ATSAME70N20A-ANT)
- 1 MB Flash with full dual-bank IAP support (vs ATSAME70N21B-CFN)
Design Notes
The ATSAME70N20B-ANT has separate analog (VDDPLL) and digital (VDDIO, VDDCORE) supply domains. Estimated: power dissipation at 300 MHz with all peripherals active is approximately 150 mA at 1.2 V core, so the core supply regulator must source at least 200 mA with adequate headroom. Place a 10 uF bulk + 100 nF decoupling capacitor pair on every VDDIO/VSSIO pair (5 groups in LQFP-100) to suppress switching noise. The PLL supply (VDDPLL) requires a ferrite bead or filter inductor from the same 3.3 V rail plus 100 nF + 10 uF decoupling.
Route the crystal traces (XIN, XOUT) as short as possible with a guard ring tied to analog ground to reduce EMI coupling. For designs using the high-speed USB PHY, follow the USB 2.0 High-Speed differential pair layout: 90 ohm differential impedance, length matching within 150 mils, no stubs. Place the 12 MHz crystal within 5 mm of XIN/XOUT with a continuous ground reference plane beneath. Estimated: at 480 Mbps USB High-Speed, trace mismatches greater than 0.5 mm between D+/D- can cause signal integrity failures.
The LQFP-100 package has a theta_JA of approximately 50 C/W on a standard 4-layer JEDEC test board. Estimated: at full 300 MHz operation with all peripherals active and 1.2 V core drawing 150 mA, power dissipation is about 180 mW, yielding a 9 C temperature rise above ambient - well within the -40C to +105C industrial range. For sealed enclosures without forced airflow, derate to 200 MHz operation or add thermal copper pours connected to the central thermal pad area beneath the package.
Do not leave unused pins floating - configure them as outputs or enable internal pull-ups to prevent shoot-through current in the I/O cells. The NRST reset pin requires a 100 nF capacitor to ground plus a 10 kohm pull-up; the internal weak pull-up alone is insufficient for noisy industrial environments. Estimated: omitting the external NRST capacitor can cause intermittent reset failures when the supply ramps slowly. Use the SAM-BA bootloader pins (PA0, PA1) with care - they share JTAG functions and must be reconfigured after programming.
Compliance Information
RoHS compliant and lead-free per Microchip product declaration. Industrial -40C to +105C temperature grade; for AEC-Q100 automotive applications use the SAM V71 family instead. Halogen-free mold compound and Pb-free terminal finish per Microchip environmental compliance documentation.
