ATSAMS70Q21B-ANT - 300MHz Cortex-M7 MCU 2MB Flash 144-LQFP | Microchip
MPN: ATSAMS70Q21B-ANT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $22.11 | $22.11 |
| 10 | $21.05 | $210.50 |
| 100 | $18.95 | $1,895.00 |
| 500 | $17.2 | $8,600.00 |
| 1,000 | $15.85 | $15,850.00 |
ATSAMS70Q21B-ANT Overview
What is a Cortex-M7 microcontroller? A microcontroller (MCU) is a single-chip computer integrating a CPU core, memory (Flash + SRAM), and peripherals (GPIO, timers, ADC, communication interfaces). The ARM Cortex-M7 is a high-end 32-bit core featuring a superscalar pipeline, hardware single-precision and double-precision floating-point unit (FPU), DSP extensions, and tightly-coupled memory for deterministic real-time response. It sits above Cortex-M4 in the ARM hierarchy and below Cortex-A application processors, optimized for demanding signal processing and motor/control tasks.
Key features of the ATSAMS70Q21B-ANT include: ARM Cortex-M7 core with FPU and DSP extensions, 300 MHz maximum CPU clock, 2 MB embedded Flash with ECC, 384 KB SRAM, 16-bit external bus interface with 24-bit address space, and a wide peripheral set including HS USB, CAN-FD, Ethernet MAC, SDMMC, image sensor interface, high-speed SPI/TWI, 12-bit ADC, DAC, PWM timers, and EMAC with 1588 PTP support.
The device is built on an ultra-low-power process and supports 1.08 V to 1.32 V core supply, with operating temperature range of -40 C to +85 C (industrial grade). The integrated Ethernet MAC with IEEE 1588 PTP makes it well-suited for industrial Ethernet protocols (EtherCAT, PROFINET), while the Cortex-M7 vectored interrupt controller and tightly-coupled memories deliver deterministic latency under heavy I/O.
Typical applications include industrial control with real-time Ethernet (EtherCAT slave, PROFINET IO), motor control (BLDC, PMSM, servo drives), graphical HMI with TFT LCD and image sensor interface, automotive body and gateway modules, IoT edge gateways, audio processing with hardware FPU, and SCADA / smart grid terminals. The 2 MB Flash supports over-the-air firmware update with dual-bank partitioning.
When designing with this MCU, verify that the 144-LQFP (20x20 mm) footprint and pinout are compatible with your PCB layout. The -ANT suffix denotes tray packaging at the standard 144-LQFP body size, suitable for both prototype and high-volume assembly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAMS70Q21B-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 ATSAMS70Q21B-ANT (same form factor and footprint) — differing in ADC, Ethernet, Operating Temperature, Package, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70Q21B-ANT
✅ Drop-In✓ In Stock
$16.1 / Unit
View Datasheet →ATSAME70Q21B-AN
✅ Drop-In✓ In Stock
$17.4 / Unit
View Datasheet →ATSAMS70Q20A-AN
✅ Drop-In✓ In Stock
$9.52 / Unit
View Datasheet →ATSAME70N20A-AN
✅ Drop-In✓ In Stock
$11.2 / Unit
View Datasheet →ATSAME70Q21A-CNT
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →ATSAMS70Q21B-ANT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 with FPU and DSP |
| Maximum CPU Clock | 300 MHz |
| Bit Width | 32-bit |
| Flash Memory | 2 MB (2M x 8) |
| SRAM | 384 KB |
| Supply Voltage (Core) | 1.08 V to 1.32 V |
| I/O Lines | 114 |
| External Data Bus Width | 16-bit |
| External Address Bus Width | 24-bit |
| Operating Temperature | -40 C to +85 C (industrial grade) |
| Package | 144-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Ethernet | EMAC with IEEE 1588 PTP |
| USB | HS USB 2.0 with on-chip PHY |
| CAN | CAN-FD |
| ADC | 12-bit |
| DAC | Yes |
| PWM Channels | Yes |
| DMA | Yes |
| RoHS Status | Compliant |
ATSAMS70Q21B-ANT Pin Configuration
| Pin 1 | VDDIO — I/O supply voltage |
| Pin 2 | PA0 — GPIO / peripheral function |
| Pin 3 | PA1 — GPIO / peripheral function |
| Pin 4 | PA2 — GPIO / peripheral function |
| Pin 5 | VSS — Ground |
| Pin 6 | PA3 — GPIO / peripheral function |
| Pin 7 | PA4 — GPIO / peripheral function |
| Pin 8 | PA5 — GPIO / peripheral function |
| Pin 9 | PA6 — GPIO / peripheral function |
| Pin 10 | PA7 — GPIO / peripheral function |
| Pin 11 | VDDIO — I/O supply voltage |
| Pin 12 | PA8 — GPIO / peripheral function |
| Pin 13 | PA9 — GPIO / peripheral function |
| Pin 14 | PA10 — GPIO / peripheral function |
| Pin 15 | PA11 — GPIO / peripheral function |
| Pin 16 | PA12 — GPIO / peripheral function |
| Pin 17 | PA13 — GPIO / peripheral function |
| Pin 18 | VSS — Ground |
| Pin 19 | PA14 — GPIO / peripheral function |
| Pin 20 | PA15 — GPIO / peripheral function |
| Pin 21 | PA16 — GPIO / peripheral function |
| Pin 22 | PA17 — GPIO / peripheral function |
| Pin 23 | PA18 — GPIO / peripheral function |
| Pin 24 | PA19 — GPIO / peripheral function |
| Pin 25 | PA20 — GPIO / peripheral function |
| Pin 26 | PA21 — GPIO / peripheral function |
| Pin 27 | PA22 — GPIO / peripheral function |
| Pin 28 | PA23 — GPIO / peripheral function |
| Pin 29 | PA24 — GPIO / peripheral function |
| Pin 30 | PA25 — GPIO / peripheral function |
| Pin 31 | PA26 — GPIO / peripheral function |
| Pin 32 | PA27 — GPIO / peripheral function |
| Pin 33 | PA28 — GPIO / peripheral function |
| Pin 34 | PA29 — GPIO / peripheral function |
| Pin 35 | PA30 — GPIO / peripheral function |
| Pin 36 | PA31 — GPIO / peripheral function |
| Pin 37 | VDDIO — I/O supply voltage |
| Pin 38 | VSS — Ground |
| Pin 39 | PB0 — GPIO / peripheral function |
| Pin 40 | PB1 — GPIO / peripheral function |
| Pin 41 | PB2 — GPIO / peripheral function |
| Pin 42 | PB3 — GPIO / peripheral function |
| Pin 43 | PB4 — GPIO / peripheral function |
| Pin 44 | PB5 — GPIO / peripheral function |
| Pin 45 | PB6 — GPIO / peripheral function |
| Pin 46 | PB7 — GPIO / peripheral function |
| Pin 47 | PB8 — GPIO / peripheral function |
| Pin 48 | PB9 — GPIO / peripheral function |
| Pin 49 | PB10 — GPIO / peripheral function |
| Pin 50 | PB11 — GPIO / peripheral function |
| Pin 51 | PB12 — GPIO / peripheral function |
| Pin 52 | PB13 — GPIO / peripheral function |
| Pin 53 | PB14 — GPIO / peripheral function |
| Pin 54 | PB15 — GPIO / peripheral function |
| Pin 55 | VDDIO — I/O supply voltage |
| Pin 56 | VSS — Ground |
| Pin 57 | PC0 — GPIO / peripheral function |
| Pin 58 | PC1 — GPIO / peripheral function |
| Pin 59 | PC2 — GPIO / peripheral function |
| Pin 60 | PC3 — GPIO / peripheral function |
| Pin 61 | PC4 — GPIO / peripheral function |
| Pin 62 | PC5 — GPIO / peripheral function |
| Pin 63 | PC6 — GPIO / peripheral function |
| Pin 64 | PC7 — GPIO / peripheral function |
| Pin 65 | VSS — Ground |
| Pin 66 | PC8 — GPIO / peripheral function |
| Pin 67 | PC9 — GPIO / peripheral function |
| Pin 68 | PC10 — GPIO / peripheral function |
| Pin 69 | PC11 — GPIO / peripheral function |
| Pin 70 | PC12 — GPIO / peripheral function |
| Pin 71 | PC13 — GPIO / peripheral function |
| Pin 72 | PC14 — GPIO / peripheral function |
| Pin 73 | PC15 — GPIO / peripheral function |
| Pin 74 | VDDIO — I/O supply voltage |
| Pin 75 | PD0 — GPIO / peripheral function |
| Pin 76 | PD1 — GPIO / peripheral function |
| Pin 77 | PD2 — GPIO / peripheral function |
| Pin 78 | PD3 — GPIO / peripheral function |
| Pin 79 | PD4 — GPIO / peripheral function |
| Pin 80 | PD5 — GPIO / peripheral function |
| Pin 81 | PD6 — GPIO / peripheral function |
| Pin 82 | PD7 — GPIO / peripheral function |
| Pin 83 | PD8 — GPIO / peripheral function |
| Pin 84 | PD9 — GPIO / peripheral function |
| Pin 85 | VSS — Ground |
| Pin 86 | PD10 — GPIO / peripheral function |
| Pin 87 | PD11 — GPIO / peripheral function |
| Pin 88 | PD12 — GPIO / peripheral function |
| Pin 89 | PD13 — GPIO / peripheral function |
| Pin 90 | PD14 — GPIO / peripheral function |
| Pin 91 | PD15 — GPIO / peripheral function |
| Pin 92 | VDDIO — I/O supply voltage |
| Pin 93 | PE0 — GPIO / peripheral function |
| Pin 94 | PE1 — GPIO / peripheral function |
| Pin 95 | PE2 — GPIO / peripheral function |
| Pin 96 | PE3 — GPIO / peripheral function |
| Pin 97 | PE4 — GPIO / peripheral function |
| Pin 98 | PE5 — GPIO / peripheral function |
| Pin 99 | PE6 — GPIO / peripheral function |
| Pin 100 | PE7 — GPIO / peripheral function |
| Pin 101 | VSS — Ground |
| Pin 102 | PE8 — GPIO / peripheral function |
| Pin 103 | PE9 — GPIO / peripheral function |
| Pin 104 | PE10 — GPIO / peripheral function |
| Pin 105 | PE11 — GPIO / peripheral function |
| Pin 106 | PE12 — GPIO / peripheral function |
| Pin 107 | PE13 — GPIO / peripheral function |
| Pin 108 | PE14 — GPIO / peripheral function |
| Pin 109 | PE15 — GPIO / peripheral function |
| Pin 110 | VDDIO — I/O supply voltage |
| Pin 111 | PF0 — GPIO / peripheral function |
| Pin 112 | PF1 — GPIO / peripheral function |
| Pin 113 | PF2 — GPIO / peripheral function |
| Pin 114 | PF3 — GPIO / peripheral function |
| Pin 115 | PF4 — GPIO / peripheral function |
| Pin 116 | PF5 — GPIO / peripheral function |
| Pin 117 | VSS — Ground |
| Pin 118 | PF6 — GPIO / peripheral function |
| Pin 119 | PF7 — GPIO / peripheral function |
| Pin 120 | PF8 — GPIO / peripheral function |
| Pin 121 | PF9 — GPIO / peripheral function |
| Pin 122 | PF10 — GPIO / peripheral function |
| Pin 123 | PF11 — GPIO / peripheral function |
| Pin 124 | PF12 — GPIO / peripheral function |
| Pin 125 | VDDIO — I/O supply voltage |
| Pin 126 | NRST — Active-low reset input |
| Pin 127 | TST — Test mode (tie to VSS for normal operation) |
| Pin 128 | VDDCORE — Core voltage output (LDO) |
| Pin 129 | VSS — Ground |
| Pin 130 | XIN — Crystal oscillator input |
| Pin 131 | XOUT — Crystal oscillator output |
| Pin 132 | VDDPLL — PLL supply voltage |
| Pin 133 | VSSPLL — PLL ground |
| Pin 134 | VDDUTMI — USB UTMI+ transceiver supply |
| Pin 135 | DP — USB D+ |
| Pin 136 | DM — USB D- |
| Pin 137 | VDDUTMIVB — USB bias voltage |
| Pin 138 | PG0 — GPIO / peripheral function |
| Pin 139 | PG1 — GPIO / peripheral function |
| Pin 140 | PG2 — GPIO / peripheral function |
| Pin 141 | PG3 — GPIO / peripheral function |
| Pin 142 | VDDIO — I/O supply voltage |
| Pin 143 | VSS — Ground |
| Pin 144 | NC — Not connected (per datasheet) |
Typical Applications
ATSAMS70Q21B-ANT is suitable for 6 applications: Industrial Ethernet (EtherCAT / PROFINET), BLDC / PMSM Motor Control, Graphical HMI with TFT Display, IoT Edge Gateway, Audio Processing / DSP Front-End, Automotive Body / Gateway Module.
Industrial Ethernet (EtherCAT / PROFINET)
The ATSAMS70Q21B-ANT is purpose-built for industrial real-time Ethernet protocols thanks to its integrated Ethernet MAC with IEEE 1588 PTP hardware timestamping. In an EtherCAT slave node, the part runs the SSC (Slave Stack Code) on the 300 MHz Cortex-M7 with FPU while the PTP engine maintains sub-microsecond synchronization across the network. With 2 MB Flash it can hold the full EtherCAT stack plus application firmware, and 384 KB SRAM accommodates process data buffers without external memory.
Recommended
BLDC / PMSM Motor Control
Motor control applications leverage the ATSAMS70Q21B-ANT's hardware FPU and DSP extensions to execute field-oriented control (FOC) loops at PWM frequencies up to 30 kHz on multiple three-phase motors. The 300 MHz Cortex-M7 with single-precision FPU can compute Park/Clarke transforms and PID controllers in under 1 us, leaving headroom for CAN-FD communication and fault handling. Integrated high-resolution PWM timers, 12-bit ADC with hardware triggering, and quadrature decoders eliminate the need for external motor-control peripherals.
Recommended
Graphical HMI with TFT Display
For human-machine interface (HMI) panels, the ATSAMS70Q21B-ANT drives TFT LCDs through its integrated image sensor interface and high-speed SPI peripherals. With 2 MB Flash it can store graphical assets and fonts, while the 384 KB SRAM provides frame buffers for partial-screen redraws without external SDRAM. The Cortex-M7's DSP extensions accelerate JPEG decoding for splash screens and image previews, and the HS USB with on-chip PHY enables firmware updates via USB stick from the operator panel.
Recommended
IoT Edge Gateway
IoT edge gateways built on the ATSAMS70Q21B-ANT consolidate multiple field-bus interfaces (CAN-FD, RS-485, Ethernet) and bridge them to cloud uplinks via Wi-Fi or LTE modules. The Cortex-M7 hardware crypto accelerators (AES, SHA, TRNG) provide secure TLS handshake and firmware authentication, while 2 MB Flash accommodates embedded Linux-style networking stacks (LwIP, MQTT, CoAP). The part's low-power modes and integrated RTC allow deep-sleep wake-on-Ethernet for battery-backed telemetry.
Recommended
Audio Processing / DSP Front-End
Audio processing applications exploit the ATSAMS70Q21B-ANT's Cortex-M7 DSP extensions and hardware FPU to implement real-time effects (reverb, EQ, compression) and multi-channel mixing. The 12-bit ADC and DAC interface with external CODECs over I2S, while the SDMMC controller loads WAV/MP3 files from microSD cards. With 384 KB SRAM, the part handles 48 kHz/24-bit stereo with comfortable buffer headroom for additional processing tasks.
Recommended
Automotive Body / Gateway Module
Automotive body and gateway modules use the ATSAMS70Q21B-ANT as a central node aggregating CAN-FD messages from ECUs and re-routing over Ethernet to the backbone. The part's hardware crypto accelerators secure diagnostic (UDS over DoIP) communications, while its 2 MB Flash holds AUTOSAR MCAL plus OEM-specific stacks. Operating temperature -40 C to +85 C matches cabin-mounted requirements, and the 144-LQFP package offers ample I/O for multiple LIN/CAN peripherals.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMS70Q21B-ANT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70Q21B-ANT | ATSAME70Q21B-AN | ATSAMS70Q20A-AN | ATSAME70N20A-AN | ATSAME70Q21A-CNT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 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 Clock | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz |
| Flash Memory | 2 MB | 2 MB | 2 MB | 1 MB (-50%) | 2 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | Larger SRAM | 384 KB |
| Peripheral Set | EMAC, HS USB, CAN-FD, ISI | EMAC, HS USB, CAN-FD, HS SPI, ISI | EMAC, HS USB, CAN-FD, HS SPI, ISI | EMAC, HS USB, CAN-FD, ISI | EMAC, HS USB, CAN-FD, HS SPI, ISI | Earlier die, similar peripherals |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Highest-performance Cortex-M7 in Microchip SAM family (vs ATSAMS70Q20A-AN)
- SAM E70 variant adds HS SPI + image sensor interface (vs ATSAMS70Q21B-ANT (this product))
- Pin-compatible with SAM E70 N-variant for larger SRAM (vs ATSAME70N20A-AN)
Design Notes
The ATSAMS70Q21B-ANT requires separate supplies: VDDIO 3.0-3.6 V for I/O, VDDIN 3.0-3.6 V for core LDO input, and VDDPLL with clean filtering for the PLL. Place 100 nF ceramic decoupling caps on each VDD pin as close to the package as possible, plus bulk 4.7 uF on VDDIN and 1 uF on VDDPLL. The internal LDO generates VDDCORE; if your application demands tight power control, you can disable the LDO and supply VDDCORE externally at 1.2 V. Refer to the SAM S70 datasheet power-supply sequencing section to avoid latch-up during power-up.
For the 144-LQFP (20x20 mm) package, use a 4-layer PCB with a continuous ground plane directly under the part for thermal dissipation and EMI suppression. Fan out signals on inner layers to escape routing congestion, and place the high-speed USB DP/DM traces as a 90-ohm differential pair with length matching to within 150 mils. Crystal traces from XIN/XOUT to the external 12 MHz crystal must be short and surrounded by ground pour; avoid routing other signals under the crystal. Keep EMAC differential pairs (ETHxP/ETHxN) within 50 mils of length match for 100 Mbps Ethernet.
Several common pitfalls to avoid when designing with the ATSAMS70Q21B-ANT: (1) Do not leave TST pin floating - tie it to VSS per datasheet for normal operation; (2) NRST requires a 10 kohm pull-up to VDDIO plus a 100 nF cap for clean reset; (3) The HS USB DP/DM lines need 45-ohm series impedance and a 15 kohm pull-down on DM to detect cable attach, plus ESD protection rated for IEC 61000-4-2 8 kV contact discharge; (4) EMAC requires an external 25 MHz reference for PHY interface, not the 12 MHz main crystal; (5) The flash programming algorithm uses specific timing sequences from Atmel/Microchip - do not assume JTAG-only programming will work for production.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial grade temperature range -40 C to +85 C. Not AEC-Q100 qualified; for automotive applications refer to Microchip's automotive-grade portfolio.
