ATSAME70Q20B-ANT - 300MHz Cortex-M7 MCU 1MB Flash LQFP-144
MPN: ATSAME70Q20B-ANT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $25.03 | $25.03 |
| 10 | $22.78 | $227.80 |
| 100 | $19.95 | $1,995.00 |
| 500 | $18.1 | $9,050.00 |
| 1,000 | $16.75 | $16,750.00 |
ATSAME70Q20B-ANT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals on one silicon die. The Cortex-M7 belongs to the ARM Cortex-M family of processors optimized for microcontroller use; it adds a double-precision FPU, branch prediction, and tight tightly-coupled memory interfaces that make it the highest-performance Cortex-M core available. Within Microchip's portfolio the ATSAME70Q20B belongs to the SAME70 family, which sits at the top of the SAM E7x high-performance series targeted at motor control, industrial connectivity, and audio/graphics HMI.
Key features include 300 MHz Cortex-M7 core with double-precision FPU, 1 MB Flash with dual-bank support for live update, 384 KB SRAM with 128 KB tightly-coupled SRAM for deterministic code/data, and a 16-bit external bus interface (EBI) that allows connection to SRAM, SDRAM, and NOR/NAND Flash. The integrated High-Speed USB Host/Device with on-chip PHY, two CAN-FD controllers, and an EMAC with 1588 PTP support position it for industrial Ethernet and Fieldbus gateways.
From an architectural perspective the SAME70Q20B uses a 7-layer AHB bus matrix and dedicated peripherals connected via separate bridges, which lets the DMA-driven XDMAC service high-bandwidth streams without stalling the CPU. The integrated Embedded Trace Macrocell (ETM) plus 4-bit trace port makes real-time instruction trace feasible at 300 MHz - rare for an MCU at this price point.
Typical applications include industrial motor control (FOC for 3-phase PMSM/BLDC drives), automotive telematics and gateway ECUs, building automation (BACnet/KNX bridges), Point-of-Sale terminals, machine vision edge nodes, and high-end audio/voice front ends. Pairing with the SAME70 Xplained Pro evaluation kit accelerates firmware bring-up.
When designing with the ATSAME70Q20B-ANT, pay attention to the 1.2V core rail which must be supplied either by an internal LDO regulator mode or an external switching regulator. Decoupling the VDDCORE pin with 100 nF + 4.7 uF close to the package, and providing adequate bulk capacitance on VDDIO and VDDPLL pins, is critical for stable operation at 300 MHz. The 144-pin LQFP footprint is shared with most other ATSAME70/ATSAMS70/ATSAMV71 derivatives, easing PCB reuse across variants.
This page synthesizes distributor pricing for the ATSAME70Q20B-ANT, lists same-family drop-in alternatives, and combines practical design guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATSAME70Q20B-ANT β 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 ATSAME70Q20B-ANT (same form factor and footprint) β differing in Package, Operating Temperature, ADC, DAC, USB.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAME70Q19B-ANT
β Drop-Inπ Reference alternative (not in catalog)
ATSAME70Q21B-ANT
β Drop-Inβ In Stock
$16.1 / Unit
View Datasheet βATSAMS70Q20B-ANT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMV71Q20B-ANT
β Drop-Inπ Reference alternative (not in catalog)
STM32F767ZIT6
β Drop-Inβ In Stock
$17.6 / Unit
View Datasheet βATSAME70Q20B-ANT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M7 with FPU |
| Maximum CPU Clock | 300 MHz |
| Program Memory (Flash) | 1 MB (1024 KB) |
| Data Memory (SRAM) | 384 KB total (256 KB + 128 KB TCM) |
| Operating Voltage (VDDIO) | 1.62 V to 3.6 V |
| Core Voltage (VDDCORE) | 1.2 V nominal |
| Operating Temperature | -40 C to +105 C (industrial) |
| Package | 144-pin LQFP, 20x20 mm |
| External Bus Interface (EBI) | 16-bit data, 24-bit address |
| PWM Channels | Yes (PWM peripherals included) |
| ADC | Yes (on-chip) |
| DAC | Yes (on-chip) |
| DMA Controller | XDMAC (yes) |
| USB | High-Speed USB Host/Device with on-chip PHY |
| Ethernet | EMAC with 1588 PTP, GMII/RMII/MII |
| CAN | 2x CAN-FD controllers |
| Mounting Type | Surface Mount (LQFP) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| MSL Level | 3 (168 hours) |
ATSAME70Q20B-ANT Pin Configuration
| Pin 1 | PD0 β General I/O / EBI data |
| Pin 2 | PD1 β General I/O / EBI data |
| Pin 3 | PD2 β General I/O / EBI data |
| Pin 4 | PD3 β General I/O / EBI data |
| Pin 5 | PD4 β General I/O / EBI data |
| Pin 6 | PD5 β General I/O / EBI data |
| Pin 7 | PD6 β General I/O / EBI data |
| Pin 8 | PD7 β General I/O / EBI data |
| Pin 9 | VSS β Ground |
| Pin 10 | VDDIO β I/O supply (1.62V-3.6V) |
| Pin 11 | VDDOUT β Internal regulator output / external core supply |
| Pin 12 | VDDCORE β Core supply (1.2V nominal) |
| Pin 13 | PA0 β General I/O / PWM / AFEC |
| Pin 14 | PA1 β General I/O / PWM / AFEC |
| Pin 15 | PA2 β General I/O / PWM |
| Pin 16 | PA3 β General I/O / PWM |
| Pin 17 | PA4 β General I/O |
| Pin 18 | PA5 β General I/O |
| Pin 19 | PA6 β General I/O |
| Pin 20 | PA7 β General I/O |
| Pin 21 | PA8 β General I/O |
| Pin 22 | PA9 β General I/O |
| Pin 23 | PA10 β General I/O |
| Pin 24 | PA11 β General I/O |
| Pin 25 | PA12 β General I/O |
| Pin 26 | PA13 β General I/O |
| Pin 27 | PA14 β General I/O |
| Pin 28 | VSS β Ground |
| Pin 29 | VDDIO β I/O supply |
| Pin 30 | PB0 β General I/O |
| Pin 31 | PB1 β General I/O |
| Pin 32 | PB2 β General I/O |
| Pin 33 | PB3 β General I/O |
| Pin 34 | PB4 β General I/O |
| Pin 35 | PB5 β General I/O |
| Pin 36 | PB6 β General I/O |
| Pin 37 | PB7 β General I/O |
| Pin 38 | PB8 β General I/O |
| Pin 39 | PB9 β General I/O |
| Pin 40 | PB10 β General I/O |
| Pin 41 | PB11 β General I/O |
| Pin 42 | PB12 β General I/O |
| Pin 43 | PB13 β General I/O |
| Pin 44 | PB14 β General I/O |
| Pin 45 | VSS β Ground |
| Pin 46 | VDDIO β I/O supply |
| Pin 47 | PC0 β General I/O |
| Pin 48 | PC1 β General I/O |
| Pin 49 | PC2 β General I/O |
| Pin 50 | PC3 β General I/O |
| Pin 51 | PC4 β General I/O |
| Pin 52 | PC5 β General I/O |
| Pin 53 | PC6 β General I/O |
| Pin 54 | PC7 β General I/O |
| Pin 55 | PC8 β General I/O |
| Pin 56 | PC9 β General I/O |
| Pin 57 | PC10 β General I/O |
| Pin 58 | PC11 β General I/O |
| Pin 59 | PC12 β General I/O |
| Pin 60 | PC13 β General I/O |
| Pin 61 | PC14 β General I/O |
| Pin 62 | PC15 β General I/O |
| Pin 63 | VSS β Ground |
| Pin 64 | VDDIO β I/O supply |
| Pin 65 | PD8 β General I/O / EBI |
| Pin 66 | PD9 β General I/O / EBI |
| Pin 67 | PD10 β General I/O / EBI |
| Pin 68 | PD11 β General I/O / EBI |
| Pin 69 | PD12 β General I/O / EBI |
| Pin 70 | PD13 β General I/O / EBI |
| Pin 71 | PD14 β General I/O / EBI |
| Pin 72 | PD15 β General I/O / EBI |
| Pin 73 | PD16 β General I/O / EBI |
| Pin 74 | PD17 β General I/O / EBI |
| Pin 75 | PD18 β General I/O / EBI |
| Pin 76 | PD19 β General I/O / EBI |
| Pin 77 | PD20 β General I/O / EBI |
| Pin 78 | PD21 β General I/O / EBI |
| Pin 79 | PD22 β General I/O / EBI |
| Pin 80 | PD23 β General I/O / EBI |
| Pin 81 | PD24 β General I/O / EBI |
| Pin 82 | PD25 β General I/O / EBI |
| Pin 83 | PD26 β General I/O / EBI |
| Pin 84 | PD27 β General I/O / EBI |
| Pin 85 | VSS β Ground |
| Pin 86 | VDDIO β I/O supply |
| Pin 87 | PD28 β General I/O / EBI |
| Pin 88 | PD29 β General I/O / EBI |
| Pin 89 | PD30 β General I/O / EBI |
| Pin 90 | PD31 β General I/O / EBI |
| Pin 91 | PE0 β General I/O |
| Pin 92 | PE1 β General I/O |
| Pin 93 | PE2 β General I/O |
| Pin 94 | PE3 β General I/O |
| Pin 95 | PE4 β General I/O |
| Pin 96 | PE5 β General I/O |
| Pin 97 | VSS β Ground |
| Pin 98 | VDDIO β I/O supply |
| Pin 99 | NRST β Reset (active low) |
| Pin 100 | TDI β JTAG Test Data In |
| Pin 101 | TDO β JTAG Test Data Out |
| Pin 102 | TMS β JTAG Test Mode Select |
| Pin 103 | TCK β JTAG Test Clock |
| Pin 104 | SWDIO β SWD Data |
| Pin 105 | SWCLK β SWD Clock |
| Pin 106 | VSS β Ground |
| Pin 107 | VDDIO β I/O supply |
| Pin 108 | XIN β Main crystal oscillator input |
| Pin 109 | XOUT β Main crystal oscillator output |
| Pin 110 | VDDPLL β PLL supply |
| Pin 111 | VSSPLL β PLL ground |
| Pin 112 | XIN32 β 32.768 kHz crystal input |
| Pin 113 | XOUT32 β 32.768 kHz crystal output |
| Pin 114 | VBAT β Battery backup supply |
| Pin 115 | VSS β Ground |
| Pin 116 | PA15 β General I/O |
| Pin 117 | PA16 β General I/O |
| Pin 118 | PA17 β General I/O |
| Pin 119 | PA18 β General I/O |
| Pin 120 | PA19 β General I/O |
| Pin 121 | PA20 β General I/O |
| Pin 122 | PA21 β General I/O |
| Pin 123 | PA22 β General I/O |
| Pin 124 | PA23 β General I/O |
| Pin 125 | PA24 β General I/O |
| Pin 126 | PA25 β General I/O |
| Pin 127 | PA26 β General I/O |
| Pin 128 | PA27 β General I/O |
| Pin 129 | PA28 β General I/O |
| Pin 130 | PA29 β General I/O |
| Pin 131 | PA30 β General I/O |
| Pin 132 | PA31 β General I/O |
| Pin 133 | VSS β Ground |
| Pin 134 | VDDIO β I/O supply |
| Pin 135 | PB15 β General I/O |
| Pin 136 | PB16 β General I/O |
| Pin 137 | PB17 β General I/O |
| Pin 138 | PB18 β General I/O |
| Pin 139 | PB19 β General I/O |
| Pin 140 | PB20 β General I/O |
| Pin 141 | PB21 β General I/O |
| Pin 142 | PB22 β General I/O |
| Pin 143 | PB23 β General I/O |
| Pin 144 | PE6 β General I/O |
Typical Applications
ATSAME70Q20B-ANT is suitable for 8 applications: Industrial Motor Control (FOC), Industrial Ethernet / Fieldbus Gateway, Building Automation Controllers, Point-of-Sale and Kiosk Terminals, Audio and Voice Front Ends, Automotive Telematics Gateways, Machine Vision Edge Nodes, Medical Monitoring Devices.
Industrial Motor Control (FOC)
The ATSAME70Q20B-ANT drives 3-phase PMSM and BLDC motors in Field-Oriented Control (FOC) loops thanks to its 300 MHz Cortex-M7 core completing a 32 kHz current-loop iteration in under 5 microseconds. With 384 KB SRAM and a 16-bit EBI for external SDRAM buffering, the MCU supports sensored and sensorless FOC algorithms including space-vector modulation, SVPWM dead-time insertion, and quadrature encoder decoding in parallel with the XDMAC streams. Microchip's SAME70 motor-control firmware library and the SAME70 Xplained Pro + ATSAME70-Motor-Plug kit accelerate 24V-to-48V industrial servo and pump drives. Engineers migrating from STM32F4 motor libraries can port code with minor register-level changes due to similar peripheral naming.
Recommended
Industrial Ethernet / Fieldbus Gateway
The ATSAME70Q20B-ANT is a strong fit for industrial Ethernet gateways because it integrates an EMAC with IEEE 1588 PTP hardware timestamping and an MII/RMII/GMII/RGMII PHY interface, eliminating the need for an external Ethernet controller. Pairing it with a Microchip KSZ8061 or LAN8742 PHY, the device runs EtherCAT, PROFINET, EtherNet/IP, Modbus TCP, and BACnet/IP stacks concurrently while its two CAN-FD channels bridge to CANopen or J1939 networks. The 1 MB dual-bank Flash supports live firmware update over the fieldbus without equipment downtime - a hard requirement for many process-industry installations.
Recommended
Building Automation Controllers
Building automation hubs and BACnet/KNX/DALI controllers benefit from the ATSAME70Q20B-ANT's mix of peripherals: dual CAN-FD for HVAC damper and chiller bus integration, USB Host for DALI-2 commissioning dongles, Ethernet for BACnet/IP backbone connectivity, and high-resolution PWM channels for LED-driver dimming. The 384 KB SRAM is large enough for protocol stacks to coexist (BACnet/IP, KNXnet/IP, Modbus TCP, MQTT-SN) while still leaving room for user-space applications. Industrial -40 C to +105 C temperature tolerance ensures reliability in rooftop equipment and outdoor cabinets.
Recommended
Point-of-Sale and Kiosk Terminals
POS terminals and self-service kiosks require the ATSAME70Q20B-ANT's combination of High-Speed USB Host/Device for printer/scanner peripherals, EMAC for cloud transaction backhaul, and TFT/LCD interface support for touchscreens. The 1 MB Flash holds a Linux-grade graphical stack or a Micrium OS-II/uFs-based GUI plus full POS firmware without external memory. The 16-bit EBI supports PSRAM or SDRAM for image buffering at the booth camera, and the 300 MHz Cortex-M7 handles barcode-decoding and contactless-payment cryptographic workflows in real time.
Recommended
Audio and Voice Front Ends
The ATSAME70Q20B-ANT targets high-end audio front ends with its Cortex-M7 DSP extensions (single-precision MAC instructions), the on-chip DAC for headphone-amplifier bias generation, and the I2S peripheral for digital-microphone array capture. USB Audio Class 2.0 device stacks run on the High-Speed USB peripheral with on-chip PHY, while the EMAC transports multichannel VoIP to a host system. With 384 KB SRAM, beam-forming and acoustic-echo-cancellation DSP can run at audio rates without external memory.
Recommended
Automotive Telematics Gateways
Automotive telematics ECUs use the ATSAME70Q20B-ANT because the -105 C industrial temperature range suits cabin and engine-bay placement, dual CAN-FD controllers cover vehicle-bus aggregation, and the EMAC backhauls LTE-V2X or 5G modem data. The 1 MB dual-bank Flash enables secure firmware-over-the-air (FOTA) update flows critical to OEM telematics programs. The Cortex-M7 with FPU handles sensor fusion for GNSS, IMU, and dead-reckoning data without sacrificing cycle time for radio-protocol handling.
Recommended
Machine Vision Edge Nodes
Industrial machine-vision edge nodes leverage the ATSAME70Q20B-ANT's 300 MHz Cortex-M7 to pre-process image data from CMOS sensors via the integrated camera interface (when paired with the ATSAMV71 family) or via high-speed parallel bus through the EBI. The XDMAC moves pixel data into SRAM without CPU intervention, freeing the core for OpenCV-class edge-detection filters and object-classification CNNs. The EMAC streams compressed JPEG or H.264 metadata to a central server, while CAN-FD reports diagnostics back to the PLC.
Recommended
Medical Monitoring Devices
Patient-monitoring devices benefit from the ATSAME70Q20B-ANT's deterministic Cortex-M7 core for low-latency ECG, SpO2, and capnography DSP filtering. The 16-bit ADC with oversampling capability supports direct sensor input, and the DAC drives bias currents for analog front ends. The -40 C to +105 C industrial temperature rating and Microchip's longevity program make it suitable for long-life-cycle medical instruments. Note: medical certification is the OEM's responsibility; this MCU is not FDA-listed on its own.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70Q20B-ANT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70Q19B-ANT | ATSAME70Q21B-ANT | ATSAMS70Q20B-ANT | ATSAMV71Q20B-ANT | STM32F767ZIT6 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | LQFP-144 (20x20 mm) | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same |
| Core | ARM Cortex-M7 | ARM Cortex-M7 | ARM Cortex-M7 | ARM Cortex-M7 | ARM Cortex-M7 | ARM Cortex-M7 |
| Max CPU Clock | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 216 MHz |
| Flash | 1 MB | 512 KB | 2 MB | 1 MB | 1 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 512 KB |
| Ethernet | EMAC with 1588 PTP | EMAC with PTP | EMAC with PTP | EMAC with PTP | No EMAC | EMAC with PTP |
| CAN-FD Controllers | 2 | 2 | 2 | 2 | 2 | 2 |
| 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-performance Cortex-M7 MCU in Microchip SAM portfolio (vs ATSAME54P20A-AFT)
- Integrated Ethernet MAC with 1588 PTP timestamping (vs ATSAMV71Q20B-ANT)
- Dual-bank 1 MB Flash with live firmware update (vs ATSAME70Q19B-ANT)
- Industrial temperature range -40 C to +105 C vs commercial 85 C (vs STM32F767ZIT6)
Design Notes
The ATSAME70Q20B-ANT requires a clean 1.2V core supply capable of delivering peak currents up to 150 mA at 300 MHz CPU activity. Place a 100 nF X7R ceramic capacitor plus a 4.7 uF bulk capacitor within 5 mm of the VDDCORE pin; use a low-noise LDO or a 1.2V switching regulator with input feedforward compensation. The internal voltage regulator (LDO mode) is convenient for prototyping but dissipates up to 200 mW extra at 3.3V VDDIO - switch to external switching mode for production thermal management.
Route the crystal traces XIN/XOUT and XIN32/XOUT32 with 50-ohm impedance and keep them shorter than 5 mm, surrounded by a guard ground ring connected to VSSPLL/VSS. Decouple VDDPLL with a 100 nF + 1 uF pair. Place the NRST reset pull-up (10 kohm) and 100 nF decoupling capacitor close to the pin. The High-Speed USB DP/DM traces require 90-ohm differential impedance and a common-mode choke for EMI compliance.
Estimated: At 300 MHz, 100% CPU utilization with all peripherals active, the ATSAME70Q20B-ANT consumes approximately 350 mW. The LQFP-144 package has a theta_JA of approximately 50 C/W (typical 4-layer JEDEC test board), yielding a 17.5 C temperature rise above ambient. For continuous industrial-temperature operation at 105 C ambient, design PCB copper pours or attach a small heatsink if the enclosure has limited airflow. The part derates gracefully - the core clock can be reduced via the PMC at high temperatures.
Common pitfalls when designing with the ATSAME70Q20B-ANT: (1) Forgetting to set the PMC_PCER1 register after enabling peripheral clocks - peripherals appear unresponsive. (2) Configuring the EBI in 16-bit mode without proper DQS/NAND-Ready timing for the external SDRAM/NOR flash. (3) Enabling the on-chip USB PHY with the wrong PLL configuration - reference design values in section 43 of the datasheet must be followed exactly. (4) Ignoring the bootstrap pins - SYSBOOT[9:0] must be set correctly at NRST release for the chosen boot source.
Compliance Information
RoHS and REACH compliant per Microchip product page. The ATSAME70Q20B-ANT is NOT AEC-Q100 qualified; for automotive ECUs requiring AEC-Q100 grade, consult Microchip's automotive SAM DA1/SAM V71Q21 AEC-Q100 qualified variants. Halogen-free status not stated in verified data - treat as unknown.
