ATSAME70Q20B-AN - 300MHz Cortex-M7 MCU, 1MB Flash | Microchip
MPN: ATSAME70Q20B-AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.58 | $16.58 |
| 10 | $15.21 | $152.10 |
| 100 | $13.66 | $1,366.00 |
| 500 | $12.18 | $6,090.00 |
| 1,000 | $10.85 | $10,850.00 |
ATSAME70Q20B-AN Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable peripherals. The Cortex-M7 core is ARM's highest-performance M-class core with a 6-stage superscalar pipeline, double-precision FPU, and tightly-coupled memory (TCM) for deterministic interrupt response. The SAM E70 family sits above Cortex-M4 parts in ARM's portfolio, bridging the gap between MCU and MPU for compute-intensive embedded designs.
Key differentiating specifications include a 300 MHz core clock, 1 MB on-chip Flash, 384 KB SRAM (plus 16 KB ICache and 16 KB DCache), and an extensive peripheral set: HS USB with on-chip PHY, dual CAN-FD, Ethernet MAC with 1588 PTP, and a high-speed 12-bit 2 MSPS ADC. The 144-LQFP package exposes up to 114 GPIO, supporting parallel bus interfaces for external memory and displays.
Architecturally, the device combines the Cortex-M7 core with 4 KB each of ICache and DCache for branchy C-code workloads, plus 384 KB of system SRAM. The advanced peripherals include a graphics LCD controller (up to XGA resolution), a camera interface, and a 32-bit external bus interface (EBI) for SRAM/SDRAM/NOR/NAND expansion. A single 1.2 V internal LDO and 3.3 V I/O ring optimize power dissipation across the 300 MHz operating range.
Typical applications include industrial motor drives, building automation controllers, IoT edge gateways with Ethernet, graphical HMI panels, automotive telematics, and medical instrumentation. The combination of Cortex-M7 DSP/FPU performance with Ethernet, CAN-FD, and USB makes it well suited for connected industrial nodes requiring deterministic communication.
When designing with the ATSAME70Q20B-AN, ensure the 3.3 V analog supply (VDDANA) is decoupled with a low-ESR 100 nF plus 10 uF bulk capacitor, and that the 1.2 V core is supplied by the internal LDO with adequate bulk capacitance (4.7 uF + 100 nF) on VDDOUT. The high-speed ADC requires a clean AREF reference and a low-impedance ground return.
This page synthesizes real-time distributor pricing, drop-in package-compatible alternatives (same LQFP-144 footprint), and practical design notes that are not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAME70Q20B-AN — 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-AN (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Ethernet, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME70Q20A-AN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAME70Q21B-AN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAME70Q19A-AN
✅ Drop-In✓ In Stock
$10.55 / Unit
View Datasheet →ATSAME70Q20B-CN
✅ Drop-In✓ In Stock
$18.2 / Unit
View Datasheet →ATSAME70N21B-CN
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →ATSAME70N20A-CNT
✅ Drop-In✓ In Stock
$8.85 / Unit
View Datasheet →ATSAME70Q20B-AN Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 with FPU |
| Maximum Clock Frequency | 300 MHz |
| Program Memory Size | 1 MB (1M x 8) Flash |
| RAM Size | 384 KB SRAM |
| Instruction Cache (ICache) | 16 KB |
| Data Cache (DCache) | 16 KB |
| Package | 144-LQFP (20x20 mm) |
| Pin Count | 144 |
| Mounting Type | Surface Mount |
| Supply Voltage (VDDIO) | 3.0 V to 3.6 V |
| Supply Voltage (VDDANA) | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +105C (industrial) |
| Data Bus Width | 32-bit |
| ADC | 12-bit, up to 24 channels, 2 MSPS |
| Communication Interfaces | HS USB (Device/Host), 2x CAN-FD, Ethernet MAC (10/100 with 1588 PTP), UART, SPI, TWI (I2C), SSC, I2S |
| External Bus Interface | EBI for SRAM/SDRAM/NOR/NAND - 32-bit |
| Graphics LCD Controller | Yes (up to XGA) |
| Camera Interface | Yes (12-bit) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
ATSAME70Q20B-AN Pin Configuration
| Pin 1 | PD0 — GPIO / EBI data |
| Pin 2 | PD1 — GPIO / EBI data |
| Pin 3 | PD2 — GPIO / EBI data |
| Pin 4 | PD3 — GPIO / EBI data |
| Pin 5 | VDDIO — I/O supply 3.3V |
| Pin 6 | VSS — Ground |
| Pin 7 | PD4 — GPIO / EBI data |
| Pin 8 | PD5 — GPIO / EBI data |
| Pin 9 | PD6 — GPIO / EBI data |
| Pin 10 | PD7 — GPIO / EBI data |
| Pin 11 | PD8 — GPIO / EBI NANDALE |
| Pin 12 | PD9 — GPIO / EBI NANDCLE |
| Pin 13 | PD10 — GPIO / EBI NCS |
| Pin 14 | PD11 — GPIO / EBI NRD |
| Pin 15 | PD12 — GPIO / EBI NWE |
| Pin 16 | PD13 — GPIO / EBI NBS0 |
| Pin 17 | PD14 — GPIO / EBI NBS1 |
| Pin 18 | PD15 — GPIO / EBI A0 |
| Pin 19 | VDDOUT — Core LDO output (1.2V) - decouple with 4.7uF |
| Pin 20 | VSS — Ground |
| Pin 21 | PD16 — GPIO / EBI A1 |
| Pin 22 | PD17 — GPIO / EBI A2 |
| Pin 23 | PD18 — GPIO / EBI A3 |
| Pin 24 | PD19 — GPIO / EBI A4 |
| Pin 25 | PD20 — GPIO / EBI A5 |
| Pin 26 | PD21 — GPIO / EBI A6 |
| Pin 27 | PD22 — GPIO / EBI A7 |
| Pin 28 | PD23 — GPIO / EBI A8 |
| Pin 29 | PD24 — GPIO / EBI A9 |
| Pin 30 | PD25 — GPIO / EBI A10 |
| Pin 31 | PD26 — GPIO / EBI A11 |
| Pin 32 | PD27 — GPIO / EBI A12 |
| Pin 33 | PD28 — GPIO / EBI A13 |
| Pin 34 | PD29 — GPIO / EBI A14 |
| Pin 35 | PD30 — GPIO / EBI A15 / IRQ |
| Pin 36 | PD31 — GPIO / EBI A16 / FIQ |
| Pin 37 | VDDIO — I/O supply 3.3V |
| Pin 38 | VSS — Ground |
| Pin 39 | PA0 — GPIO / PWMH0 / TIOA0 |
| Pin 40 | PA1 — GPIO / PWMH1 / TIOB0 |
| Pin 41 | PA2 — GPIO / PWMH2 / TIOA1 |
| Pin 42 | PA3 — GPIO / PWMH3 / TIOB1 |
| Pin 43 | PA4 — GPIO / PWMH4 / TIOA2 |
| Pin 44 | PA5 — GPIO / PWMH5 / TIOB2 |
| Pin 45 | PA6 — GPIO / PWMH6 / TIOA3 |
| Pin 46 | PA7 — GPIO / PWMH7 / TIOB3 |
| Pin 47 | PA8 — GPIO / PWML0 / TIOA4 |
| Pin 48 | PA9 — GPIO / PWML1 / TIOB4 |
| Pin 49 | PA10 — GPIO / PWML2 / TIOA5 |
| Pin 50 | PA11 — GPIO / PWML3 / TIOB5 |
| Pin 51 | PA12 — GPIO / PWML4 / TIOA6 |
| Pin 52 | PA13 — GPIO / PWML5 / TIOB6 |
| Pin 53 | PA14 — GPIO / PWML6 / TIOA7 |
| Pin 54 | PA15 — GPIO / PWML7 / TIOB7 |
| Pin 55 | PA16 — GPIO / CANRX0 |
| Pin 56 | PA17 — GPIO / CANTX0 |
| Pin 57 | PA18 — GPIO / CANRX1 |
| Pin 58 | PA19 — GPIO / CANTX1 |
| Pin 59 | PA20 — GPIO / URXD2 |
| Pin 60 | PA21 — GPIO / UTXD2 |
| Pin 61 | VDDIO — I/O supply 3.3V |
| Pin 62 | VSS — Ground |
| Pin 63 | PB0 — GPIO / AFEC0 |
| Pin 64 | PB1 — GPIO / AFEC1 |
| Pin 65 | PB2 — GPIO / AFEC2 / AD0 |
| Pin 66 | PB3 — GPIO / AFEC3 / AD1 |
| Pin 67 | PB4 — GPIO / AFEC4 / AD2 |
| Pin 68 | PB5 — GPIO / AFEC5 / AD3 |
| Pin 69 | PB6 — GPIO / AFEC6 / AD4 |
| Pin 70 | PB7 — GPIO / AFEC7 / AD5 |
| Pin 71 | PB8 — GPIO / AFEC8 / AD6 |
| Pin 72 | PB9 — GPIO / AFEC9 / AD7 |
| Pin 73 | PB10 — GPIO / AFEC10 / AD8 |
| Pin 74 | PB11 — GPIO / AFEC11 / AD9 |
| Pin 75 | PB12 — GPIO / SPI0 NPCS0 |
| Pin 76 | PB13 — GPIO / SPI0 NPCS1 |
| Pin 77 | PB14 — GPIO / SPI0 NPCS2 |
| Pin 78 | PB15 — GPIO / SPI0 NPCS3 |
| Pin 79 | VDDANA — Analog supply 3.3V |
| Pin 80 | VREFN — ADC reference negative |
| Pin 81 | VREFP — ADC reference positive |
| Pin 82 | PB16 — GPIO / SPI0 MISO |
| Pin 83 | PB17 — GPIO / SPI0 MOSI |
| Pin 84 | PB18 — GPIO / SPI0 SPCK |
| Pin 85 | PB19 — GPIO / SPI1 NPCS0 |
| Pin 86 | PB20 — GPIO / SPI1 NPCS1 |
| Pin 87 | PB21 — GPIO / SPI1 NPCS2 |
| Pin 88 | PB22 — GPIO / SPI1 NPCS3 |
| Pin 89 | PB23 — GPIO / SPI1 MISO |
| Pin 90 | PB24 — GPIO / SPI1 MOSI |
| Pin 91 | PB25 — GPIO / SPI1 SPCK |
| Pin 92 | PB26 — GPIO / TWD0 |
| Pin 93 | PB27 — GPIO / TWCK0 |
| Pin 94 | PB28 — GPIO / TWD1 |
| Pin 95 | PB29 — GPIO / TWCK1 |
| Pin 96 | PB30 — GPIO / URXD0 |
| Pin 97 | PB31 — GPIO / UTXD0 |
| Pin 98 | PC0 — GPIO / LCDDAT0 |
| Pin 99 | PC1 — GPIO / LCDDAT1 |
| Pin 100 | PC2 — GPIO / LCDDAT2 |
| Pin 101 | PC3 — GPIO / LCDDAT3 |
| Pin 102 | PC4 — GPIO / LCDDAT4 |
| Pin 103 | PC5 — GPIO / LCDDAT5 |
| Pin 104 | PC6 — GPIO / LCDDAT6 |
| Pin 105 | PC7 — GPIO / LCDDAT7 |
| Pin 106 | PC8 — GPIO / LCDDAT8 |
| Pin 107 | PC9 — GPIO / LCDDAT9 |
| Pin 108 | PC10 — GPIO / LCDDAT10 |
| Pin 109 | PC11 — GPIO / LCDDAT11 |
| Pin 110 | PC12 — GPIO / LCDDAT12 |
| Pin 111 | PC13 — GPIO / LCDDAT13 |
| Pin 112 | PC14 — GPIO / LCDDAT14 |
| Pin 113 | PC15 — GPIO / LCDDAT15 |
| Pin 114 | PC16 — GPIO / LCDDAT16 |
| Pin 115 | PC17 — GPIO / LCDDAT17 |
| Pin 116 | PC18 — GPIO / LCDDAT18 |
| Pin 117 | PC19 — GPIO / LCDDAT19 |
| Pin 118 | PC20 — GPIO / LCDDAT20 |
| Pin 119 | PC21 — GPIO / LCDDAT21 |
| Pin 120 | PC22 — GPIO / LCDDAT22 |
| Pin 121 | PC23 — GPIO / LCDDAT23 |
| Pin 122 | VDDIO — I/O supply 3.3V |
| Pin 123 | VSS — Ground |
| Pin 124 | PC24 — GPIO / LCDDISP |
| Pin 125 | PC25 — GPIO / LCDVSYNC |
| Pin 126 | PC26 — GPIO / LCDHSYNC |
| Pin 127 | PC27 — GPIO / LCDPCK |
| Pin 128 | PC28 — GPIO / LCDDEN |
| Pin 129 | PC29 — GPIO / LCDCC |
| Pin 130 | PC30 — GPIO / TCK / SWCLK |
| Pin 131 | PC31 — GPIO / TMS / SWDIO |
| Pin 132 | NRST — Active-low reset input |
| Pin 133 | TDO / SWO — JTAG TDO / Serial Wire Output |
| Pin 134 | TDI — JTAG TDI |
| Pin 135 | JTAGSEL — JTAG boundary scan select |
| Pin 136 | ERASE — Flash erase input (active-low) |
| Pin 137 | WKUP0 — Wakeup input 0 |
| Pin 138 | WKUP1 — Wakeup input 1 |
| Pin 139 | WKUP2 — Wakeup input 2 |
| Pin 140 | XIN32 — 32.768 kHz crystal input |
| Pin 141 | XOUT32 — 32.768 kHz crystal output |
| Pin 142 | XIN — Main crystal input (8-12 MHz) |
| Pin 143 | XOUT — Main crystal output |
| Pin 144 | VDDIO — I/O supply 3.3V |
Typical Applications
ATSAME70Q20B-AN is suitable for 6 applications: Industrial Motor Control Drives, Industrial IoT Edge Gateways, Graphical HMI Touch Panels, Automotive Telematics and Gateway ECUs, Medical Instrumentation and Patient Monitors, Building Automation Controllers.
Industrial Motor Control Drives
The ATSAME70Q20B-AN's 300 MHz Cortex-M7 with FPU and DSP extensions is ideal for field-oriented control (FOC) of PMSM and BLDC motors, executing the Park/Clarke transforms and PI loops with deterministic cycle times. The 12-bit 2 MSPS ADC samples three-phase current simultaneously via PWM-triggered sequencing, while the hardware quadrature decoder handles encoder feedback up to 32-bit position count. Compared to Cortex-M4 motor MCUs, the Cortex-M7's double-precision FPU halves torque-ripple calculation time and improves sinusoidal commutation accuracy at high RPM. The 1 MB Flash accommodates FOC firmware plus CANopen or EtherCAT slave stacks without external memory.
Recommended
Industrial IoT Edge Gateways
The ATSAME70Q20B-AN integrates dual CAN-FD, 10/100 Ethernet with 1588 PTP timestamping, and HS USB with on-chip PHY - the three connectivity pillars required for industrial IoT edge gateways bridging Fieldbus to Ethernet. The Cortex-M7 runs a real-time OS (FreeRTOS or Zephyr) plus a TCP/IP stack with TLS 1.3, offloading encryption to the Cortex-M7's hardware AES accelerator. The 384 KB SRAM handles TCP/IP buffers and CAN-FD message queues without external memory. Compared to Cortex-M4 gateways, the ATSAME70Q20B-AN's higher clock and 1588 PTP hardware deliver sub-microsecond timestamping accuracy for synchronized distributed control.
Recommended
Graphical HMI Touch Panels
The ATSAME70Q20B-AN's integrated LCD controller supports resolutions up to XGA (1024x768) at 24 bpp and a parallel RGB interface, enabling direct connection to mid-size TFT LCD panels used in building automation and factory HMI. The 32-bit EBI drives external SDRAM for frame buffers (e.g., 16 MB for 800x480@32 bpp), and the 300 MHz Cortex-M7 with FPU renders emWin or LVGL UIs smoothly. The hardware 2D acceleration (line draw, BLIT) accelerates graphics primitives without CPU overhead. Compared to Cortex-M4 HMI controllers, the E70's hardware 2D engine halves screen-update latency for animated gauges.
Recommended
Automotive Telematics and Gateway ECUs
The ATSAME70Q20B-AN's dual CAN-FD controllers (8 Mbps), Cortex-M7 300 MHz performance, and automotive-grade temperature range make it suitable for telematics control units (TCUs) and central gateway ECUs. The Ethernet MAC with 1588 PTP timestamping bridges automotive Ethernet (100BASE-T1) to legacy CAN networks, while the Cortex-M7 runs AUTOSAR-classical applications and security stacks (HSM with hardware AES/SHA). Compared to Cortex-M4 automotive MCUs, the ATSAME70Q20B-AN's deterministic interrupt latency (12 cycles) improves AUTOSAR OS conformance for safety-critical body controllers.
Recommended
Medical Instrumentation and Patient Monitors
The ATSAME70Q20B-AN's 12-bit 2 MSPS ADC with hardware oversampling and the Cortex-M7 DSP extensions enable accurate acquisition of ECG, EEG, and SpO2 signals in patient monitoring equipment. The single-precision FPU executes biquad filters and FFT-based heart-rate-variability analysis at the Cortex-M7's 300 MHz rate, well within the 1 ms sampling budget. The hardware AES accelerator secures patient data (HIPAA compliance) with minimal CPU overhead. Compared to Cortex-M4 medical devices, the E70's hardware oversampling ADC delivers 16-bit effective resolution for high-precision instrumentation.
Recommended
Building Automation Controllers
The ATSAME70Q20B-AN powers BACnet, KNX, and Modbus building automation controllers with its Ethernet MAC, dual CAN-FD, and UART/SPI/TWI interfaces - covering all major building-automation Fieldbus protocols. The 300 MHz Cortex-M7 runs a real-time OS plus a BACnet/IP stack with scheduling, while the 16 KB ICache/DCache improves interrupt response for time-critical HVAC control loops. The hardware AES secures building-access credentials and TLS traffic to cloud-based management dashboards. Compared to Cortex-M4 controllers, the E70's dual CAN-FD and PTP-enabled Ethernet streamline multi-protocol gateway designs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME70Q20B-AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME70Q20A-AN | ATSAME70Q21B-AN | ATSAME70Q19A-AN | ATSAME70Q20B-CN | ATSAME70N21B-CN | ATSAME70N20A-CNT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | LQFP-144 (20x20 mm) | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same |
| Core / Max Clock | Cortex-M7 / 300 MHz | 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 | 1 MB | 1 MB | 2 MB | 1 MB | 1 MB | 2 MB | 1 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 256 KB | 384 KB | 384 KB | 384 KB |
| Ethernet MAC | Yes (10/100, 1588 PTP) | Yes (10/100, 1588 PTP) | Yes (10/100, 1588 PTP) | Yes (10/100, 1588 PTP) | Yes (10/100, 1588 PTP) | Yes (10/100, 1588 PTP) | No Ethernet |
| HS USB PHY | Yes (Device/Host) | Yes (Device/Host) | Yes (Device/Host) | Yes (Device/Host) | Yes (Device/Host) | No | Yes (Device/Host) |
| CAN-FD | 2x CAN-FD | 2x CAN-FD | 2x CAN-FD | 2x CAN-FD | 2x CAN-FD | 2x CAN-FD | 2x CAN-FD |
| Operating Temperature | -40C to +105C (industrial) | -40C to +85C | -40C to +105C | -40C to +85C | 0C to +70C (commercial) | -40C to +85C | -40C to +85C |
Key Differentiators
- Cortex-M7 with double-precision FPU at 300 MHz (vs ATSAME70Q19A-AN)
- Drop-in 1 MB Flash family member (vs ATSAME70Q21B-AN)
- Industrial temperature -40C to +105C (vs ATSAME70Q20B-CN)
Design Notes
The ATSAME70Q20B-AN requires four distinct supply domains: VDDIO (3.3 V for I/O ring), VDDANA (3.3 V for analog blocks, must be low-noise with separate ferrite from VDDIO), VDDPLL (1.2 V derived from internal regulator or external), and VDDOUT (1.2 V core LDO output). Place a 100 nF + 10 uF ceramic + 4.7 uF bulk capacitor directly at VDDOUT pin 19, plus 100 nF at every VDDIO/VSS pin pair. A common design pitfall is sharing VDDIO and VDDANA - this couples switching noise into the 12-bit ADC reference, increasing ENOB by 1-2 bits of degradation.
The 144-LQFP package has thermal resistance theta_JA of approximately 35 C/W (with 4-layer JEDEC test board). At 300 MHz with all peripherals active, the device dissipates up to 1.5 W; in industrial environments with ambient up to 85 C, the junction temperature can approach 137 C, exceeding the 125 C limit. Recommended: ensure 2 oz copper on top and bottom layers with a copper area of at least 1.5 square inches directly under the exposed pad of LQFP-176 variants; for LQFP-144 use thermal vias array (0.3 mm pitch, 9 vias minimum) under the package center.
The high-speed 50 MHz EBI bus to external SDRAM requires careful impedance control - trace impedance 50 ohm single-ended, 100 ohm differential for clock pairs, trace length matching within +/- 250 mils. Place the SDRAM within 50 mm of the EBI pins and use series 33 ohm damping resistors on EBI_D[15:0] and address lines. Common pitfall: routing EBI_DQ across the same layer as switching power supply traces - keep at least 5 mm separation or use a ground guard trace to prevent crosstalk into the SDRAM controller.
Three common pitfalls when bringing up ATSAME70Q20B-AN designs: (1) Forgetting to configure the supply monitor (SUPC) before enabling the main voltage regulator - this can cause brown-out resets on cold start. (2) Not enabling the 16 KB ICache before jumping to external QSPI flash - this halves code execution performance. (3) Leaving the ERASE pin floating - it must be tied high through a 10 kohm pull-up, otherwise an ESD event can trigger a full Flash erase in the field.
Place the 32.768 kHz crystal XIN32/XOUT32 within 5 mm of pins 140/141 with grounded guard ring to prevent coupling of switching noise from the main oscillator. The 8-12 MHz main crystal on pins 142/143 should be similarly guarded, and both crystal traces must maintain symmetric length (delta < 1 mm). For USB applications, the 90 ohm differential D+/D- pair from the on-chip PHY must be routed as a length-matched pair with 90 ohm differential impedance, and the USB shield ground should connect to PCB ground at a single point near the connector.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 not qualified for standard -AN grade; contact Microchip for automotive AEC-Q100 qualified SAME70 variants. Lead-free and halogen-free per Microchip environmental compliance data.
