ATSAME70Q21B-ANT - 300MHz Cortex-M7 MCU 2MB Flash | Microchip
MPN: ATSAME70Q21B-ANT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $21.59 | $21.59 |
| 10 | $20.15 | $201.50 |
| 100 | $18.4 | $1,840.00 |
| 250 | $17.25 | $4,312.50 |
| 500 | $16.1 | $8,050.00 |
ATSAME70Q21B-ANT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripheral interfaces (UART, SPI, timers, ADC, etc.) into one device. The Cortex-M7 sits at the top of the ARM Cortex-M family, with superscalar pipeline, tightly-coupled memory, and optional double-precision FPU, sitting between Cortex-M4 (mid-tier) and Cortex-A (application processors) in capability. The SAM E70 series targets high-performance embedded designs such as industrial control, audio processing, motor drives, and human-machine interface (HMI) systems.
Key features of the ATSAME70Q21B-ANT include a 300 MHz Cortex-M7 core with single/double-precision FPU, 2 MB on-chip Flash, 384 KB SRAM, an external bus interface (EBI) for SDRAM/FPGA expansion, and a high-speed USB 2.0 High-Speed PHY with on-chip transceiver. Additional features include a 12-bit ADC, a 12-bit DAC, an embedded TFT LCD controller, hardware AES, and a Camera Interface. The device also integrates a 10/100 Ethernet MAC and CAN-FD support for industrial networking. Operating voltage range is 1.62 V to 3.6 V across multiple supply domains, with industrial temperature range of -40C to +85C.
The SAM E70 architecture uses a 5-stage superscalar pipeline and includes 16 KB of instruction cache and 16 KB of data cache, which accelerate execution from external memory. The peripheral DMA (PDCA/XDMAC) and event system reduce CPU load, allowing efficient real-time control and audio streaming. The integrated High-Speed USB PHY eliminates external transceiver ICs, simplifying USB Host/Device designs.
Typical applications include industrial motor control and factory automation, audio processing and effects units, HMI panels with TFT LCD, USB audio interfaces, automotive instrument clusters, IoT gateways with Ethernet, and medical instrumentation. The wide peripheral mix supports both signal conditioning and human-machine interfaces on a single chip.
When designing with the ATSAME70Q21B-ANT, ensure VDDCORE is supplied from an internal LDO regulator mode or external switching regulator mode with sufficient bulk decoupling, and that the 25 MHz main crystal is matched to the USB PLL configuration. Use 4-layer PCB stack-up with a dedicated ground plane for best EMI and signal-integrity performance on the EBI and SDRAM signals.
This page consolidates distributor pricing, drop-in same-package alternatives within the SAM E70 family, and design notes not found in a single manufacturer page, providing engineers a decision-ready view for selecting the ATSAME70Q21B-ANT in production designs.
Drop-in alternatives for ATSAME70Q21B-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 ATSAME70Q21B-ANT (same form factor and footprint) — differing in Package, USB, ADC, Ethernet, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70Q21B-AN
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAME70Q21A-CFNT
✅ Drop-In✓ In Stock
$11.4 / Unit
View Datasheet →ATSAME70Q21A-ANT
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →ATSAME70Q20B-ANT
✅ Drop-In✓ In Stock
$16.75 / Unit
View Datasheet →ATSAME70Q20B-AN
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →ATSAME70J21A-ANT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$9.6 / Unit
View Datasheet →ATSAME70Q21B-ANT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M7 with FPU (single/double precision) |
| Maximum Clock Speed | 300 MHz |
| Program Memory (Flash) | 2 MB (2048 KB) |
| Data Memory (SRAM) | 384 KB |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| Package | 144-LQFP (20x20 mm) |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V |
| Supply Voltage (VDDCORE) | 1.2 V (internal LDO or external switching regulator) |
| Operating Temperature | -40C to +85C (industrial) |
| ADC | 12-bit, up to 24 channels |
| DAC | 12-bit, 2 channels |
| USB | USB 2.0 High-Speed Host/Device with on-chip PHY |
| Ethernet | 10/100 MAC (GMII/RMII/MII) |
| CAN | CAN-FD |
| External Bus Interface (EBI) | Yes (SDRAM, SRAM, FPGA) |
| TFT LCD Controller | Yes (up to 1024x768) |
| Camera Interface | Yes (12-bit, ITU-R BT 601/656) |
| Hardware Crypto | AES (256-bit) |
| RoHS Status | Compliant |
ATSAME70Q21B-ANT 144-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for ATSAME70Q21B-ANT (144-lqfp (20x20 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 ATSAME70Q21B-ANT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAME70Q21B-ANT is suitable for 6 applications: Industrial Motor Control, USB Audio Interface, HMI Panels with TFT LCD, Industrial IoT Gateway with Ethernet, Automotive Instrument Clusters, Medical Instrumentation.
Industrial Motor Control
The ATSAME70Q21B-ANT suits industrial motor control with its 300 MHz Cortex-M7 DSP extensions (single-cycle MAC, SIMD) executing field-oriented control (FOC) loops within 5 us. The 384 KB SRAM holds three-axis current/speed/position state without external memory, while the 12-bit 2 MSPS ADC samples phase currents simultaneously. The HRPWM with 150 ps resolution drives IGBT/MOSFET bridges at 20 kHz switching frequency. Hardware AES secures command bus traffic, and CAN-FD links to industrial PLC networks.
Recommended
USB Audio Interface
The integrated USB 2.0 High-Speed PHY enables USB Audio Class 2.0 at 24-bit/192 kHz without external ULPI chips. Cortex-M7 DSP extensions accelerate biquad filters, EQ, and reverb effects in real time. The 12-bit DAC plus external I2S codec outputs, and the TFT controller supports on-device LCD for level meters. The 384 KB SRAM buffers multi-channel audio streams, and the EBI allows external SDRAM for longer delay-line reverb. Power: 1.62-3.6 V single-supply matches battery-powered audio interfaces.
Recommended
HMI Panels with TFT LCD
The TFT LCD controller integrated in the ATSAME70Q21B-ANT drives displays up to 1024x768 without external LCD controller ICs, slashing BOM cost. The 2 MB Flash stores full graphical assets (PNG/JPEG via hardware decoder), and the 384 KB SRAM holds frame buffers for partial refresh. The Camera Interface enables QR-code scanning at 30 fps. Cortex-M7's DSP accelerates vector rendering and 2D graphics primitives. Industrial -40C to +85C temperature range suits factory-floor HMI panels.
Recommended
Industrial IoT Gateway with Ethernet
The 10/100 Ethernet MAC plus TCP/IP offload libraries makes the ATSAME70Q21B-ANT ideal for IoT gateways bridging Modbus/Profibus fieldbuses to MQTT cloud. Cortex-M7 at 300 MHz runs TLS 1.3 handshake in under 200 ms using hardware AES acceleration. CAN-FD and multiple UARTs handle multi-protocol fieldbus bridging. The 2 MB Flash supports dual-bank OTA updates for firmware lifecycle management. Hardware crypto accelerator offloads RSA/ECC operations needed for secure boot and signed firmware updates.
Recommended
Automotive Instrument Clusters
The Cortex-M7 dual-issue pipeline plus TFT controller drives automotive cluster displays at 60 fps with vector graphics and gauge animations. CAN-FD interfaces to vehicle networks, while the Camera Interface supports rear-view camera input. Industrial temperature range and PPAP documentation ease automotive qualification. Note: for full AEC-Q100 grade, prefer the SAM V71 family (e.g., ATSAMV71Q21B-ANT) over the SAM E70 industrial grade ATSAME70Q21B-ANT.
Recommended
Medical Instrumentation
The 12-bit 2 MSPS ADC plus Cortex-M7 DSP performs real-time DSP on ECG, pulse oximetry, and bioimpedance signals. Hardware AES enables HIPAA-compliant encryption of patient data transmitted over USB or Ethernet. The 2 MB Flash stores waveforms and reference libraries, while 384 KB SRAM handles 10-second rolling buffers for Holter monitoring. Industrial -40C to +85C temperature range suits clinical environments. IEC 60730 software-class-B libraries are available from Microchip for compliance-ready firmware.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70Q21B-ANT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70Q21B-AN | ATSAME70Q21A-CFNT | ATSAME70Q21A-ANT | ATSAME70Q20B-ANT | ATSAME70Q20B-AN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) |
| Core | Cortex-M7 @ 300 MHz | Cortex-M7 @ 300 MHz | Cortex-M7 @ 300 MHz | Cortex-M7 @ 300 MHz | Cortex-M7 @ 300 MHz | Cortex-M7 @ 300 MHz |
| Flash | 2 MB | 2 MB | 2 MB | 2 MB | 1 MB | 1 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
| Silicon Revision | B | B | A | A | B | B |
| USB High-Speed PHY | Yes (integrated) | Yes | Yes | Yes | Yes | Yes |
| Hardware AES | Yes (256-bit) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest-density SAM E70 silicon revision with all errata fixed (vs ATSAME70Q21A-ANT)
- Maximum Flash density at this package size (vs ATSAME70Q20B-ANT)
- Tape-and-Reel for high-volume SMT assembly (vs ATSAME70Q21B-AN)
Design Notes
The ATSAME70Q21B-ANT requires two supply rails: VDDCORE (1.2 V) and VDDIO (1.62-3.6 V). VDDCORE can be sourced from the internal 1.2 V LDO regulator (up to 200 mA load) or from an external switching regulator for higher power efficiency. Estimated: at 300 MHz CPU + USB + Ethernet full load, core current reaches 100-150 mA; the internal LDO dissipates up to (VDDIO - 1.2 V) * 150 mA = up to 360 mW at 3.3 V VDDIO. Use external regulator if thermal budget is tight. Bulk decoupling requires 4.7 uF + 100 nF close to each supply pin pair.
Use a 4-layer PCB stack-up with a continuous ground plane beneath the MCU. The high-speed USB traces need 90 ohm differential impedance with ground reference on adjacent layer, plus common-mode choke near the USB connector. The 25 MHz main crystal traces must be shorter than 5 mm, surrounded by ground pour, and matched to within 10 pF load as listed in the crystal selection table. Estimated trace lengths for SDRAM/EBI signals: keep under 50 mm to maintain timing margins at 150 MHz.
The external bus interface (EBI) connecting to SDRAM operates at up to 150 MHz; route address/data/control signals with matched lengths (within 5 mm). Add series termination resistors (22-33 ohm) on data lines to dampen reflections. Per the SAM E70 family datasheet, the EBI timing budget includes setup/hold of 2 ns, so PCB trace skew must stay below this. Use ground-reference vias adjacent to each signal via to maintain return path continuity.
Do not leave unused clock pins floating; tie XTAL1/XTAL2 to ground if not used. The NRST pin requires an external 10 kohm pull-up to VDDIO and a 100 nF cap to ground for proper reset behavior. When migrating from ATSAME70Q21A to ATSAME70Q21B (this part), check errata documents because revision B fixes USB suspend current and ADC offset drift issues. The 12-bit DAC outputs cannot drive resistive loads directly - add a buffer op-amp if driving headphones or speakers.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C, not AEC-Q100 qualified; for automotive-grade migrate to SAM V71 family (e.g., ATSAMV71Q21B-ANT).
