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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~ATSAMD21G17A-MUT~~

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ATSAMD21G17A-MUT - Atmel

Name: Atmel ATSAMD21G17A-MUT
Brand: Atmel
SKU: ATSAMD21G17A-MUT
Availability: InStock
Rating: 5 (9 reviews)

Manufacturer Part Number: ATSAMD21G17A-MUT

Manufacturer: Atmel

Allelco Part Number: 32D-ATSAMD21G17A-MUT

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 15,403 pcs available, New & Original

Parts Description: IC MCU 32BIT 128KB FLASH 48QFN

Package: 48-QFN (7x7)

Data sheet: -

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In stock: 15403

Specifications

ATSAMD21G17A-MUT Tech Specifications
Atmel - ATSAMD21G17A-MUT technical specifications, attributes, parameters and parts with similar specifications to Atmel - ATSAMD21G17A-MUT

Product Attribute	Attribute Value
Manufacturer	Atmel
Voltage - Supply (Vcc/Vdd)	1.62V ~ 3.6V
Supplier Device Package	48-QFN (7x7)
Speed	48MHz
Series	SAM D21G, Functional Safety (FuSa)
RAM Size	16K x 8
Program Memory Type	FLASH
Program Memory Size	128KB (128K x 8)
Peripherals	Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Package / Case	48-VFQFN Exposed Pad
Package	Bulk

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	38
Mounting Type	Surface Mount
EEPROM Size	-
Data Converters	A/D 14x12b; D/A 1x10b
Core Size	32-Bit Single-Core
Core Processor	ARM® Cortex®-M0+
Connectivity	I²C, LINbus, SPI, UART/USART, USB
Base Product Number	ATSAMD21

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
ECCN	3A991A2
HTSUS	8542.31.0001

Frequently Asked Questions(FAQ)

What are the key architectural advantages of the ATSAMD21G17A-MUT for low-power embedded applications compared to other Cortex-M0+ MCUs in the same voltage range?: The ATSAMD21G17A-MUT leverages Atmel’s proprietary low-power design techniques, including multiple sleep modes (Idle, Standby, and Backup) with fast wake-up times under 2µs from Standby. Its 32-bit ARM Cortex-M0+ core operates at 48MHz while maintaining a typical active current of 35µA/MHz at 3.3V, enabling efficient performance-per-watt in battery-powered systems. The integrated 16KB SRAM and 128KB flash support zero-wait-state execution up to 24MHz, reducing dynamic power during compute-intensive tasks.

How does the ATSAMD21G17A-MUT handle brown-out conditions, and what design considerations should be made for reliable operation near the lower Vcc limit of 1.62V?: The ATSAMD21G17A-MUT includes a programmable Brown-Out Detect (BOD) module with selectable thresholds (typically 1.7V, 2.7V, and 3.0V). When operating near 1.62V—such as in energy harvesting or single-cell Li-ion applications—the BOD must be disabled or set to the lowest threshold to avoid unintended resets. However, disabling BOD requires careful PCB layout to minimize noise coupling, and external voltage supervision may be necessary for mission-critical functions due to reduced noise margin at ultra-low supply voltages.

Can the ATSAMD21G17A-MUT support real-time audio processing using its I2S and DMA peripherals, and what are the practical throughput limitations?: Yes, the ATSAMD21G17A-MUT’s I2S interface combined with 8-channel DMA enables efficient audio streaming. For example, a 16-bit stereo stream at 48kHz requires approximately 1.536 Mbps bandwidth, well within the peripheral’s capability. With DMA handling data transfers, CPU overhead remains minimal (<5% at 48MHz), allowing concurrent execution of control logic or signal processing algorithms. However, sustained high-rate transfers may require careful buffer management to prevent underruns, especially when sharing bus bandwidth with flash access or other high-priority peripherals.

What are the trade-offs between using the internal oscillator versus an external crystal for timing-sensitive applications with the ATSAMD21G17A-MUT?: The internal ±1% RC oscillator in the ATSAMD21G17A-MUT suffices for UART, SPI, and general-purpose timing but introduces jitter unsuitable for precision timing or USB communication. For USB 2.0 Full-Speed (12 Mbps), an external 8MHz crystal with load capacitors is mandatory to meet timing tolerances. Using an external oscillator improves UART baud rate accuracy to ±0.2% and enables reliable LIN communication, but increases BOM cost, board space, and startup time by ~1–2ms compared to the internal oscillator’s sub-100µs wake-up.

How does the ATSAMD21G17A-MUT compare to the ATSAMD21E17A in terms of I/O flexibility and package constraints for compact PCB designs?: The ATSAMD21G17A-MUT (48-QFN, 7x7mm) offers 38 I/O pins versus 29 on the ATSAMD21E17A (32-QFN, 5x5mm), providing greater peripheral multiplexing options and routing flexibility. This makes the G17A variant better suited for applications requiring multiple communication interfaces (e.g., simultaneous USB, I2C, and SPI) or analog inputs. However, the exposed pad on the 48-QFN package demands precise solder stencil design and thermal vias for reliable reflow, increasing layout complexity compared to the smaller E-series package.

Is the ATSAMD21G17A-MUT suitable for functional safety applications, and what documentation or features support compliance with IEC 61508 or ISO 26262?: The ATSAMD21G17A-MUT is part of Atmel’s Functional Safety (FuSa) portfolio, offering built-in self-test (BIST) for flash and RAM, clock failure detection, and dual watchdog timers. While the device itself is not certified, it provides the architectural foundation for developing safety-critical systems up to SIL 2 or ASIL B. Designers must supplement with external diagnostics and follow safety manuals and FMEDA reports provided by Microchip (post-Atmel acquisition) to achieve system-level certification.

What are the implications of the 12-bit ADC performance in the ATSAMD21G17A-MUT for sensor interfacing, particularly in noisy industrial environments?: The ATSAMD21G17A-MUT’s 12-bit ADC achieves up to 350kSPS but exhibits an effective number of bits (ENOB) of ~10.5 under typical conditions due to integral nonlinearity (±3 LSB). In high-noise environments, enabling the internal sample-and-hold capacitor and using oversampling (e.g., 4x oversampling for 13-bit resolution) improves signal integrity. However, for precision measurements (e.g., RTD or strain gauge), an external 16-bit ADC with differential inputs is recommended, as the MCU’s single-ended inputs lack built-in PGA or offset calibration.

How should power sequencing and decoupling be implemented for the ATSAMD21G17A-MUT in multi-rail systems to ensure reliable startup and EMC compliance?: The ATSAMD21G17A-MUT requires VDDCORE (internally generated) and VDDIO to be stable within the 1.62V–3.6V window. Use a 100nF ceramic capacitor placed within 2mm of each VDD pin, supplemented by a 4.7µF bulk capacitor near the power entry point. In multi-rail designs, ensure VDDIO ramps before or simultaneously with other I/O voltages to prevent latch-up. A soft-start controller or supervisor IC can enforce sequencing if core and I/O rails are derived from separate regulators, minimizing inrush current and voltage overshoot during power-up.

Can the ATSAMD21G17A-MUT’s USB peripheral operate in host mode, and what external components are required for a basic USB OTG implementation?: The ATSAMD21G17A-MUT supports USB 2.0 Full-Speed device mode natively but requires an external transceiver or companion IC for host or OTG functionality. For device-only applications, only a 1.5kΩ pull-up resistor on D+ (for Full-Speed) and 22Ω series termination resistors on D+/D− lines are needed. Implementing host mode necessitates a USB PHY (e.g., USB3300) and 5V-tolerant I/O, increasing system complexity. Most designs use the ATSAMD21G17A-MUT as a peripheral controller interfacing with a host processor via USB CDC or HID classes.

What are the thermal considerations for the ATSAMD21G17A-MUT when operating at maximum clock speed and ambient temperature (85°C), especially in enclosed designs?: At 48MHz and 3.3V, the ATSAMD21G17A-MUT dissipates approximately 120mW under full load, resulting in a junction temperature rise of ~15°C above ambient when mounted on a standard 2-layer PCB. In an 85°C environment, this approaches the 100°C TJmax limit, risking thermal throttling or reduced reliability. Adding thermal vias under the exposed pad and increasing copper pour area can lower θJA by 20–30%, ensuring safe operation. For continuous high-load scenarios, derating the clock frequency to 32MHz reduces power by ~30% and significantly improves thermal headroom.

Parts with Similar Specifications

The three parts on the right have similar specifications to Atmel ATSAMD21G17A-MUT

Product Attribute
Part Number	ATSAMD21G17A-MUT	ATSAMD21G17A-UUT	ATSAMD21G17A-AUT	ATSAMD21G17A-MU
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Peripherals	-	-	-	-
Program Memory Size	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
EEPROM Size	-	-	-	-
Speed	-	-	-	-
Program Memory Type	-	-	-	-
Series	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Oscillator Type	-	-	-	-
Core Size	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Core Processor	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Connectivity	-	-	-	-
Number of I/O	-	-	-	-
Data Converters	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
RAM Size	-	-	-	-

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Customer Reviews

Evaluation: 10 Articles

Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.

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America	Brazil	7
Europe	Germany	5
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Oceania	Australia	6
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