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ATSAMD21G16B-MF - 64KB Flash Cortex-M0+ MCU 48QFN | Microchip
ATSAMD21G16B-MF

ATSAMD21G16B-MF - 64KB Flash Cortex-M0+ MCU 48QFN | Microchip

The Microchip (formerly Atmel) ATSAMD21G16B-MF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, integrating 64KB of Flash and 8KB of SRAM, and supplied in a 48-pin QFN package rated for the industrial -40C to +125C temperature range. The device runs at up to 48 MHz, reaching 2.46 CoreMark/MHz, and is described by Microchip as a low-power general-purpose member of the SAM D21 series. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of peripherals (timers, ADC, communication interfaces, GPIO). The Cortex-M0+ is ARM's smallest and most energy-efficient application processor core, designed for deterministic real-time control in deeply embedded systems. The SAM D21 family belongs to the 32-bit microcontroller tier within the broader hierarchy of microcontrollers -> embedded processors -> semiconductors. Typical Cortex-M0+ MCUs target IoT endpoints, sensor hubs, human-interface devices, and battery-powered consumer products where active current draw and deep-sleep current are first-order constraints. Key features of the ATSAMD21G16B-MF include the 48 MHz Cortex-M0+ core with single-cycle hardware multiply, a full-speed USB 2.0 device controller, a 12-bit 350 ksps ADC with PGA, up to six SERCOM serial-communication channels configurable as UART/SPI/I2C, a 24-bit Timer/Counter for control applications, and an on-chip 32.768 kHz RTC oscillator. The device is qualified for the industrial temperature range (-40C to +125C), supports 3.3V single-supply operation, and is RoHS/REACH compliant in a halogen-free green-package compound. Architecturally, the SAM D21 is built around an AHB/APB bus matrix with a separate low-power peripheral bus, allowing individual peripherals to be clock-gated during sleep. The integrated Power Manager (PM) and Sleepwalking peripherals let the core stay in deep sleep while SERCOM, ADC, or timers wake the system on a peripheral event - this is the foundation of the family's low-power claim. An on-chip 8-channel Event System routes peripheral triggers without CPU intervention, which reduces interrupt load for tightly-timed control loops. Typical applications for the ATSAMD21G16B-MF include Arduino-compatible maker boards (the chip is the silicon heart of the Arduino Zero / MKR family), USB HID peripherals such as keyboards and mice, low-power wireless sensor nodes, industrial sensor interfaces, and small HMI panels. Designers also deploy it in consumer wearables, BLE bridge modules, and battery-powered instrumentation where 3.3V single-supply and USB are both required. When designing with this MCU, allocate the 64KB Flash budget between bootloader, application, and a small file system; the 8KB SRAM constrains large packet buffers and dictates careful DMA usage for high-throughput USB or display workloads. Decouple VDD and VDDANA separately per the SAM D21 reference design, and use the on-chip PLL to derive system frequency from the internal 8 MHz oscillator if external crystals are not available. This page synthesizes distributor pricing, drop-in alternatives from the SAMD21 family, and practical design notes not found in the manufacturer datasheet - including cross-references to the 48-TQFP variant ATSAMD21G16B-AU which shares the same silicon die.

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ATSAMD21G16B-MFT - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip
ATSAMD21G16B-MFT

ATSAMD21G16B-MFT - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip

The Microchip Technology ATSAMD21G16B-MFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, integrating 64KB of in-system self-programmable Flash and 8KB of SRAM in a 48-pin QFN (7x7 mm) package rated for industrial -40C to +125C operation. It runs at up to 48MHz, delivers 2.46 CoreMark/MHz, and provides a Functional Safety (FuSa) capable architecture targeting IEC 60730 class B safety integrity. The device operates from a 1.62V to 3.63V supply and is offered in tape-and-reel packaging (MFT suffix). A microcontroller (MCU) is a compact system-on-chip that combines a CPU core, program and data memory, and a rich set of peripherals on a single die. The Cortex-M0+ is ARM's smallest and most energy-efficient application processor core, designed for deterministic embedded control in cost- and power-sensitive applications. Within Microchip's portfolio the SAM D21 sits below the SAM D51 (Cortex-M4F) and above the SAM D11 (Cortex-M0+) families, occupying the low-power general-purpose MCU tier with USB, SERCOM, and event system integration. Key features include six SERCOM communication interfaces (each configurable as UART, SPI, or I2C), a USB 2.0 Full-Speed device with on-chip transceiver, a 12-bit 350ksps ADC, two analog comparators, a 10-bit DAC, up to 38 GPIO pins, and the Event System for inter-peripheral triggers. The peripheral touch controller (PTC) supports capacitive touch sensing, and the device includes a real-time clock, multiple timer/counters, and a DMA controller for offloading CPU data movement. The SAM D21 architecture combines a single-cycle hardware multiplier, a Micro Trace Buffer for lightweight instruction tracing, and a SleepWalking interrupt scheme that lets peripherals wake the CPU on events without full domain wake-up. Brown-out detection, power-on reset, and a DFLL48M closed-loop oscillator with FDPLL96K 96MHz fractional digital PLL deliver robust analog performance. The complete brown-out and POR chain, hardware-managed with multiple threshold choices, enhances robustness in noisy environments.

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ATSAMD21G16B-MUT - 48MHz Cortex-M0+ MCU 64KB | 48-QFN | Microchip
ATSAMD21G16B-MUT

ATSAMD21G16B-MUT - 48MHz Cortex-M0+ MCU 64KB | 48-QFN | Microchip

The Microchip Technology ATSAMD21G16B-MUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, integrating 64KB of in-system self-programmable Flash and 8KB SRAM in a 48-pin QFN (7x7 mm) package. It operates at up to 48 MHz and delivers 2.46 CoreMark/MHz while supporting a wide 1.62V-3.63V supply range. The device includes the SAM D21G peripheral set: SERCOM (configurable serial communication), 20-channel event system, 16 external interrupts, full-speed USB 2.0 device, and a 12-bit true analog DAC. A microcontroller (MCU) is an integrated circuit that combines a CPU core, volatile and non-volatile memory, programmable I/O peripherals, and a clock system on a single die. MCUs form the lowest tier of embedded computing, sitting between discrete logic and full microprocessors. The SAM D21 family is Microchip's low-power Cortex-M0+ line, designed to give designers deterministic real-time behavior, ultra-low sleep currents, and pin-compatible migration across 32-, 48-, and 64-pin packages for hardware reuse. Key features include a 32-bit Cortex-M0+ core with single-cycle hardware multiplier, Micro Trace Buffer for lightweight instruction trace, brown-out detection and power-on reset, and two-pin Serial Wire Debug. The SAM D21G includes a 12-bit ADC with up to 350 ksps sampling, a 10-bit DAC, up to six SERCOM modules configurable as UART/SPI/I2C, and a full-speed USB 2.0 device with embedded PHY. The device is drop-in compatible with earlier D20 peripherals in the same 48-pin QFN. Technically, the ATSAMD21G16B-MUT is the 48-pin QFN variant of the SAM D21 series, which scales flash (32KB-256KB) and pin count across 32-, 48-, and 64-pin families. The 'B' suffix denotes the second-generation silicon revision; per Microchip application note AT04470, the L variant has a different pinout and is not drop-in compatible with A/B variants. Typical applications include IoT sensor nodes, USB peripherals, low-power wearables, and human-machine interface (HMI) panels in industrial control. The wide 1.62V-3.63V supply, low-power sleep modes, and integrated USB make it well-suited to battery-powered or bus-powered designs. Designers should note that the 48-QFN package requires a thermal pad (EP) soldered to a ground copper pour to meet rated datasheet endurance.

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ATSAMD21G16L-MNT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
ATSAMD21G16L-MNT

ATSAMD21G16L-MNT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip

The Microchip Technology ATSAMD21G16L-MNT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, running at 48 MHz with 64 KB of Flash and 8 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It operates from 1.6 V to 3.6 V and supports industrial temperature range up to +105 °C, making it well-suited for lighting, motor control, and industrial applications. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program and data memory, peripherals, and I/O into one package. The Cortex-M0+ is ARM's smallest and most energy-efficient core, optimized for deterministic real-time control in cost- and power-sensitive embedded systems. The SAMD21 family sits in Microchip's mainstream 32-bit MCU portfolio, bridging 8-bit AVR and higher-performance Cortex-M4 parts. Key features include the Cortex-M0+ core with single-cycle I/O access, full-speed USB 2.0 device/host, up to six SERCOM serial interfaces (configurable as UART, SPI, or I²C), a 12-channel DMA controller and 12-channel Event System for low-overhead peripheral chaining. The device integrates a 12-bit ADC, 10-bit DAC, and analog comparators, plus two-pin Serial Wire Debug (SWD). Architecturally, the SAMD21G16L uses a pipelined Cortex-M0+ with single-cycle multiplier and a low-power peripheral event system that allows peripherals to communicate without CPU wakeup, enabling SleepWalking and aggressive standby currents in the microamp range. The 64 KB Flash supports in-application programming and is ECC-protected on critical ranges. Typical applications include LED lighting and horticulture drivers, low-end BLDC motor control, industrial sensor hubs, USB HID peripherals, and battery-powered IoT endpoints. The combination of USB device/host, ample SRAM, and 38 GPIOs makes it a strong fit for Human Interface Devices (HID), wearables, and connected sensor nodes. Designers should pay attention to the 48-QFN exposed pad, which must be soldered to a sufficient ground copper pour for thermal dissipation and signal return, and should follow Microchip's SAMD21 schematic checklist for decoupling, SWD pull-ups, and crystal load capacitor selection. This page consolidates distributor pricing, same-package drop-in alternatives, and practical design notes that supplement the manufacturer datasheet for engineers evaluating the ATSAMD21G16L-MNT.

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ATSAMD21G16L-MUT - 32-bit Cortex-M0+ MCU, 64KB Flash, 48MHz | Microchip
ATSAMD21G16L-MUT

ATSAMD21G16L-MUT - 32-bit Cortex-M0+ MCU, 64KB Flash, 48MHz | Microchip

The Microchip Technology ATSAMD21G16L-MUT is a 32-bit ARM Cortex-M0+ based Flash microcontroller from the SAM D21G family, operating at up to 48 MHz with 64 KB Flash and 8 KB SRAM in a 48-pin QFN (7x7 mm) package with exposed pad. It integrates the SAM D21G, a Functional Safety (FuSa) capable variant of the SAM D21 line, featuring the L-variant silicon revision with enhanced analog and PWM peripheral sets. The device operates from 1.6 V to 3.6 V and is rated for the standard industrial temperature range of -40 C to +85 C per the Mouser product description. A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, peripherals, and I/O on a single chip. The ARM Cortex-M0+ is the smallest and most energy-efficient ARM core, designed for embedded applications that need deterministic real-time behavior at low power. Within Microchip's portfolio, the ATSAMD21G16L belongs to the SAM D family of Cortex-M0+ devices, which sit below the Cortex-M4 SAM E/SAM4S families and above the tinyAVR/AVR XMEGA families in terms of performance and feature integration. Key features of the ATSAMD21G16L-MUT include: up to 48 MHz core clock, 64 KB Flash (64K x 8), 8 KB SRAM, Direct Memory Access (DMA) controller, full-speed USB 2.0 device, up to 6 SERCOM (serial communication) interfaces, a 12-bit ADC, a 10-bit DAC, and multiple timer/counter and PWM channels. The 48-QFN package includes an exposed thermal pad that improves heat dissipation and provides a low-impedance ground connection, which is critical at the higher CPU frequencies. Architecturally, the SAM D21G L-variant combines a single-cycle hardware multiplier, single-cycle I/O port access, and a low-power SleepWalking peripheral event system. Compared with the older ATSAMD21G16A/B variants, the L revision changes pinout to add additional analog and timer channels per Microchip application note AT04470, so the L is not a drop-in for A/B silicon. Typical applications include consumer electronics, IoT sensor nodes, USB human-interface devices, low-power wireless sensor hubs, lighting controllers, and industrial control with Functional Safety (FuSa) considerations. The combination of USB device, DMA, and rich peripherals makes it a strong fit for connected products on tight power budgets. When designing with this MCU, route the exposed pad (EP) to a continuous ground plane for thermal and electrical performance, and follow Microchip's SAM D21 hardware design checklist for decoupling. The L-variant pinout is not compatible with A/B variants, so PCB layout cannot be reused directly from ATSAMD21G16A/B reference designs. This page synthesizes verified distributor pricing, same-brand drop-in alternatives from the SAM D20/SAM D21 family, and practical design notes not found on a single manufacturer page.

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ATSAMD21G17A-AF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21G17A-AF

ATSAMD21G17A-AF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip ATSAMD21G17A-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, operating at up to 48 MHz and packaged in a 48-pin TQFP (7x7 mm) for industrial temperature range. The device integrates 128 KB of Flash, 16 KB of SRAM, a full-speed USB 2.0 interface with on-chip transceiver, and a rich set of peripherals including SERCOM, ADC, DAC, and timer/counters. Operating voltage is 1.6 V to 3.6 V with deep-sleep current under 5 microamps, making the part well suited to battery-powered and always-on designs. An ARM Cortex-M0+ microcontroller is a 32-bit embedded processor core built on the von Neumann/Thumb-2 instruction set, optimised for low gate count and energy efficiency. It sits within the hierarchy ARM core -> Cortex-M -> Cortex-M0+ -> microcontroller -> embedded SoC. The Cortex-M0+ is the smallest and most energy-efficient member of the Cortex-M family, delivering roughly 2.46 CoreMark/MHz while consuming far less power than Cortex-M3/M4 implementations. Key features include 128 KB Flash with 4 KB Read-While-Write region, 16 KB SRAM, six SERCOM ports each configurable as UART/SPI/I2C, a 12-bit ADC with up to 350 ksps, a 10-bit DAC, two I2S interfaces, a 24-bit RTC, full-speed USB 2.0 device with embedded PHY, and an Event System for inter-peripheral signalling. The integrated 48 MHz DFLL with a 32 kHz crystal reference provides accurate clocking across temperature. Security features include a true random number generator, AES-256 hardware accelerator, and Flash content protection. Architecturally the ATSAMD21G17A-AF pairs the Cortex-M0+ core with an AHB-Lite bus matrix that routes the DMAC, USB, SERCOM, and Event System directly into SRAM. The on-chip voltage regulator supports a single 1.6 V to 3.6 V supply and includes brown-out detection; multiple sleep modes (Idle, Standby, Backup) with fast wake-up enable aggressive power profiles for IoT edge nodes. Typical applications include home automation hubs, smart metering, industrial sensor nodes, consumer wearables, USB HID/CDC devices, and human-machine interface (HMI) panels. The combination of USB device, ADC, and SERCOM allows one MCU to replace discrete bridge ICs and external ADCs. Design considerations for this MCU include a 4-layer PCB with continuous ground pour to maintain signal integrity on the USB DP/DM pair, a 1 microfarad decoupling cap on VDDIN, and a 32.768 kHz crystal for RTC accuracy. The SWD interface uses dedicated pins and Microchip's Atmel-ICE or J-Link debuggers are fully supported. This page combines verified distributor pricing, a curated list of drop-in alternative MPNs, and design notes that are not available on the manufacturer product page, offering practical engineering value for BOM decisions.

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ATSAMD21G17A-AFT - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21G17A-AFT

ATSAMD21G17A-AFT - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21G17A-AFT is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21G family, delivering 48 MHz CPU performance with 128 KB Flash and 16 KB SRAM in a 48-pin TQFP (7x7 mm) package. It operates from 1.6 V to 3.6 V, integrates full-speed USB 2.0 with on-chip transceiver, and targets the Functional Safety (FuSa) subsystem grade. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals (timers, ADC, communication interfaces, GPIOs). It belongs to the embedded computing hierarchy: microcontroller -> embedded processor -> semiconductor device -> integrated circuit. The Cortex-M0+ is ARM's smallest, most energy-efficient 32-bit core, designed for deterministic real-time control and ultra-low-power battery applications. Key features include 6 SERCOM (configurable serial interfaces, each supporting I2C/SPI/USART), a 12-bit ADC with up to 350 ksps sampling rate, two analog comparators, a 24-channel Event System for inter-peripheral signalling, and a 16-bit timer/counter array. It also provides a full-speed USB 2.0 Device/Embedded Host with on-chip PHY eliminating external transceiver cost. The 'G' pin-count tier (48 pins) integrates 38 programmable I/O lines with 5V tolerant inputs, suiting medium-density designs. The device supports Sleep, Idle, Standby and Backup sleepwalking modes with wake-on-interrupt capability, drawing under 1 µA in Backup mode with RTC retention - critical for battery-powered IoT endpoints. Typical applications include USB HID peripherals, smart home sensor hubs, industrial sensor nodes, motor control subsystems, and low-power wearables. The on-chip USB, ample RAM, and FreeRTOS/Microchip Harmony support accelerate mid-volume product development. When designing, allocate at least a 4-layer PCB with continuous ground beneath the QFN/TQFP thermal pad for best EMI; the Cortex-M0+ requires no external crystal for USB when using the 32 kHz PLL lock mode. Always enable the Watchdog Timer (WDT) in safety-critical applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21G17A-AU - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAMD21G17A-AU

ATSAMD21G17A-AU - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip Technology ATSAMD21G17A-AU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, integrating 128KB of Flash, 16KB of SRAM, and a 48MHz core, housed in a 48-pin TQFP (7x7 mm) package. It operates from a 1.62V to 3.6V supply, integrates a full-speed USB 2.0 device with on-chip transceiver, and provides 2.46 CoreMark/MHz performance. What is a Cortex-M0+ microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The ARM Cortex-M0+ is the smallest, most energy-efficient core in the Cortex-M family, designed for low-cost, low-power embedded applications. Microcontrollers belong to the broader hierarchy of embedded processors -> microcontrollers -> ARM Cortex-M microcontrollers -> Cortex-M0+ family. The SAM D21 family adds Microchip's peripheral set, including SERCOM, Event System, and advanced PWM/timer blocks. Key features include six SERCOM configurable serial interfaces (UART/SPI/I2C), a 12-bit 350ksps ADC with up to 14 channels, two analog comparators, a 10-bit 350ksps DAC, and up to 38 GPIO pins. The integrated Full-Speed USB 2.0 transceiver and Device Controller eliminate the need for an external PHY, and the Event System allows peripherals to communicate without CPU intervention, reducing active time and power consumption. Architecturally, the SAM D21G uses a single-cycle hardware multiplier, single-cycle 32-bit I/O access via the AHB-APB bridge, and a low-power SleepWalking peripheral event system. Functional Safety (FuSa) support and built-in CRC-32 hardware enable IEC 60730 class B compliance for home appliance designs, while a True Random Number Generator (TRNG) supports secure key storage in IoT nodes. Typical applications include home automation gateways, smart metering, industrial sensor nodes, consumer wearables, USB HID peripherals, and low-power IoT edge devices. The wide 1.62V-3.6V supply range simplifies designs powered directly from single-cell Li-ion or 3.3V system rails. Design consideration: at 48MHz the core reaches 2.46 CoreMark/MHz but can drop to under 100uA/MHz in standby with RTC running. Decoupling must include 100nF on each VDD pin and a 4.7uF bulk capacitor near the VCORE pin. This page consolidates distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the datasheet's parameter tables.

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ATSAMD21G17A-AUT - 128KB Flash Cortex-M0+ MCU 48MHz | Microchip
ATSAMD21G17A-AUT

ATSAMD21G17A-AUT - 128KB Flash Cortex-M0+ MCU 48MHz | Microchip

The Microchip Technology ATSAMD21G17A-AUT is a low-power, high-performance ARM Cortex-M0+ based 32-bit flash microcontroller delivering 48 MHz core performance with 128 KB Flash and 16 KB SRAM, housed in a 48-pin TQFP (7x7 mm) package qualified for automotive grade (AUT = -40C to +125C operating temperature). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripheral interfaces. ARM Cortex-M0+ is the smallest and most energy-efficient ARM core, designed for deterministic embedded control in cost-sensitive and battery-powered applications. The ATSAMD21G17A-AUT belongs to the SAM D21 family, a broad family of Cortex-M0+ MCUs spanning 32 to 64 pins with up to 256 KB Flash, enabling simple and intuitive migration between pin counts and memory sizes within the same peripheral set. Key features include 128 KB of Flash with 4 KB read-while-write (RWW) partition, 16 KB SRAM, a full-speed USB 2.0 interface with integrated transceiver, SERCOM (serial communication) interfaces, a 12-bit ADC with up to 20 channels, 10-bit DAC, and multiple timer/counter/PWM channels. The device operates from 1.62 V to 3.63 V, supports SleepWalking peripheral gating, and integrates Event System for zero-latency inter-peripheral signalling without CPU intervention. Architecturally the ATSAMD21G17A-AUT combines an ARM Cortex-M0+ core with Microchip's peripheral set and a single-cycle hardware multiplier, achieving 2.46 CoreMark/MHz. The DFLL/DFLLM frequency-locked loop and 48 MHz calibrated internal oscillator eliminate the need for an external crystal in many designs, simplifying BOM and reducing PCB area. Typical applications include home automation nodes, smart metering endpoints, consumer wearables, industrial sensor hubs, and USB HID peripherals. The automotive-grade temperature range and integrated USB make it well suited for automotive body electronics, infotainment accessory controllers, and OBD-II interface dongles. When designing with this device, note that the USB peripheral requires an external 32.768 kHz crystal for full USB suspend/resume compliance, while non-USB applications can run from the internal oscillator alone. The AUT suffix requires AEC-Q100 qualification review for production hardware inspection.

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ATSAMD21G17A-MF - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAMD21G17A-MF

ATSAMD21G17A-MF - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip ATSAMD21G17A-MF is a 32-bit ARM Cortex-M0+ microcontroller running at 48 MHz with 128 KB of Flash and 16 KB of SRAM in a 48-pin QFN (7x7 mm) package. It belongs to the SAM D21G family and integrates a 2.46 CoreMark/MHz processor, USB 2.0 Full Speed device/host, up to six SERCOM serial interfaces, a 12-bit ADC, 10-bit DAC, and a peripheral touch controller (PTC) for capacitive sensing. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O into one package. The ARM Cortex-M0+ is a 32-bit RISC core designed by Arm for ultra-low-power embedded applications, making MCUs based on it well suited to battery-powered, always-on, and cost-sensitive designs. Within the Microchip SAM D21 family, the 'G' pin-count class identifies the 48-pin variants, which strike a balance between I/O count and board area. Key features of the ATSAMD21G17A-MF include 128 KB Flash with 4 KB independent read-while-write (RWW) section, 16 KB SRAM, an Event System for inter-peripheral signaling without CPU intervention, a SleepWalking peripheral power manager that keeps the CPU asleep while peripherals scan for events, and a brown-out detector with supply voltage monitoring (POR, BOD33, BOD12). The device operates from a single 1.62 V to 3.63 V supply. On the architecture side, the SAM D21 uses an advanced low-power design with multiple sleep modes (IDLE, STANDBY, BACKUP), a 32.768 kHz RTC with calendar mode, and a 2-channel DMA controller. The SERCOM modules can each be reconfigured as UART, SPI, or I2C, giving designers flexible connectivity without committing pins to a fixed protocol. Typical applications include consumer and home-automation products, smart metering, industrial sensor nodes, low-cost USB devices, wearable electronics, and capacitive-touch user interfaces. The device's low power consumption, PTC touch support, and USB on-chip make it a strong fit for IoT edge nodes. When designing with this MCU, ensure adequate decoupling (one 100 nF X7R per VDD pin and a bulk 4.7 uF near the package) and provide a clean 3.3 V rail because the on-chip analog peripherals (ADC, DAC, PTC) are sensitive to supply noise. For programming and debug, the SAM D21 uses the SWD two-wire interface; reserve PA30 (SWDCLK) and PA31 (SWDIO) and do not populate external pull-downs on those pins. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and embedded engineers a single reference for evaluation, second-source planning, and PCB bring-up.

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ATSAMD21G17A-MFT - SAM D21G 48MHz Cortex-M0+ MCU 128KB | Microchip
ATSAMD21G17A-MFT

ATSAMD21G17A-MFT - SAM D21G 48MHz Cortex-M0+ MCU 128KB | Microchip

The Microchip Technology ATSAMD21G17A-MFT is a low-power, high-performance 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21G family, housed in a 48-pin QFN (7x7 mm) package with a -40C to +125C industrial temperature rating. It integrates 128KB of flash, 16KB of SRAM, and a 4KB read-while-write (RWW) flash partition, and operates at up to 48MHz, achieving 2.46 CoreMark/MHz. A microcontroller (MCU) is an integrated circuit combining a CPU core, volatile and non-volatile memory, programmable peripherals, and interrupt logic on a single die. The Cortex-M0+ core is the smallest, most energy-efficient member of the ARM Cortex-M family, designed for deterministic real-time embedded control in deeply embedded applications. The ATSAMD21G17A-MFT belongs to the broader SAM D family (Cortex-M0+) within Microchip's portfolio of 32-bit microcontrollers, sharing a linear address map and hex-compatible code with sibling SAM D21E/J variants for simple migration. Key features of the ATSAMD21G17A-MFT include a full-speed USB 2.0 device/host port, an Event System for inter-peripheral signalling, a 12-bit 1 MSPS ADC, 10-bit DAC, multiple timers/counters, SERCOM serial interfaces, and an I2S interface for digital audio. The device operates from 1.6V to 3.6V and includes integrated touch support via the Peripheral Touch Controller (PTC) and a Dual-Interface Flash ROM that supports both MCU and bootloader access. The architecture pairs a Cortex-M0+ core with Microchip's peripheral DMA, an 8-channel Event System, and an advanced analog front-end including two configurable analog comparators and a 12-bit ADC with up to 350 kSPS throughput. SleepWalking peripherals and a low-power RTC enable idle current as low as a few microamperes, suiting battery-operated designs. Functional Safety (FuSa) features and the 125C temperature grade qualify the part for industrial-grade deployments. Typical applications include home automation nodes, smart metering endpoints, consumer Human-Interface Devices (HIDs), industrial sensor hubs, and IoT edge devices that need USB connectivity. The integrated USB, ADC, and PWM channels also serve well in motor-control subsystems, BLDC driver control boards, and low-power wearables that demand deterministic Cortex-M0+ behaviour. When designing with this part, allocate careful PCB routing for the 48-pin QFN thermal pad and provide low-impedance ground returns for the analog channels; keep high-speed SERCOM traces short to preserve signal integrity at 48MHz.

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ATSAMD21G17A-MU - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAMD21G17A-MU

ATSAMD21G17A-MU - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip Technology ATSAMD21G17A-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family operating at up to 48 MHz, integrating 128 KB of Flash and 16 KB of SRAM in a 48-pin QFN (7x7 mm) package. It is supplied from a 1.62 V to 3.6 V rail, provides up to 38 GPIO, and includes full-speed USB 2.0 with on-chip transceiver, two I2C, up to six SERCOM-configurable serial channels, 12-bit ADC, 10-bit DAC, and multiple timer/counter blocks. The device is qualified for industrial temperature range -40C to +85C and is RoHS/REACH compliant. An ARM Cortex-M0+ MCU is a 32-bit microcontroller built around the Cortex-M0+ processor core, an ultra-low-power Thumb-2 instruction-set core designed for embedded deterministic control. Within the broader semiconductor hierarchy, Cortex-M0+ parts sit under ARM Cortex-M -> 32-bit microcontroller -> microcontroller -> digital IC -> integrated circuit. The SAM D21 family targets low-power connected applications where USB connectivity, peripheral flexibility via SERCOM, and low active/idle current are critical. Key features of the ATSAMD21G17A-MU include the integrated USB 2.0 Full-Speed device/host with on-chip transceiver eliminating external PHY cost, a 12-channel 350 ksps 12-bit ADC with differential and single-ended modes, two analog comparators, a 10-bit 350 ksps DAC, and a Real-Time Clock with calendar mode. The SERCOM modules each independently support I2C/SPI/USART, allowing flexible pin function assignment without re-routing PCB traces. The Event System, Peripheral Touch Controller (PTC), and DMAC offload the CPU for low-latency peripheral interactions. Architecturally, the device couples the Cortex-M0+ core with a multi-layer AHB/APB bus matrix, dedicated SERCOM peripherals, and a low-power architecture offering Sleep, Standby, and Backup domains with typical active current under 3 mA at 48 MHz. The 2.46 CoreMark/MHz efficiency and zero-wait-state Flash at 48 MHz yield 2.46*48 = ~118 CoreMark headroom for typical firmware loads. Typical applications include USB HID and CDC peripherals, low-power IoT sensor nodes, home automation controllers, consumer wearables, industrial HMI panels, and metering endpoints requiring USB firmware upgrade. Design consideration: ensure VDD and VDDIO decoupling (100 nF + bulk 4.7 uF) are placed within 3 mm of the package pins, and route the USB DP/DM pair as a 90 ohm differential microstrip with length matching under 2 mm to pass USB compliance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21G17D-AFT - 48MHz Cortex-M0+ 128KB Flash MCU | Microchip
ATSAMD21G17D-AFT

ATSAMD21G17D-AFT - 48MHz Cortex-M0+ 128KB Flash MCU | Microchip

The Microchip Technology ATSAMD21G17D-AFT is an ARM Cortex-M0+ based 32-bit flash microcontroller operating at up to 48 MHz, delivering 128 KB of Flash and 16 KB of SRAM in a 48-pin TQFP (7x7 mm) package. It belongs to the SAM D21G family, supporting Functional Safety (FuSa) applications, with the -AFT suffix denoting an industrial temperature grade (-40C to +125C) and Tape & Reel packaging. The device integrates a Full-Speed USB 2.0 interface with on-chip transceiver, 12 DMA channels, 9 timers, 6 SERCOM serial-communication modules configurable as UART, SPI, I2C, I2S or LIN, a 12-bit 350 ksps ADC, 10-bit DAC, and analog comparators. What is a Cortex-M0+ microcontroller? A Cortex-M0+ microcontroller is a 32-bit ARM microprocessor core optimized for ultra-low power and deterministic real-time response, sitting at the entry level of the Cortex-M family. The ATSAMD21G17D-AFT positions itself as a low-power, high-performance MCU that bridges 8-bit PIC/AVR designs and more capable Cortex-M4 parts, sitting within the broader Microchip SAM microcontroller portfolio which spans SAM D, SAM C, SAM S, SAM E and SAM V families. Key differentiating features include 1.62V to 3.63V supply operation, ultra-low-power Sleep and Standby modes with typical currents below 5 microamps with RTC retention, and an integrated peripheral touch controller (PTC) for capacitive touch interfaces. The device exposes 38 programmable I/O pins with 5V-tolerant inputs on selected pins, providing flexibility for mixed-voltage designs without level shifters on slow signals. Architecturally, the ATSAMD21G17D-AFT implements the Cortex-M0+ v6-M instruction set with single-cycle I/O access via the AHB-APB bus matrix, hardware multiplier, and a tightly-coupled Nested Vectored Interrupt Controller (NVIC). The integrated USB 2.0 Full-Speed PHY eliminates external transceiver components, while 4 KB of Read-While-Write Flash allows live firmware updates without application interruption. Typical applications include USB human-interface devices (HID), consumer electronics with capacitive touch, smart-home and home-automation gateways, industrial sensor hubs, low-cost data loggers, and metering solutions. The wide operating temperature range suits outdoor or harsh-environment deployments such as factory-floor controllers or smart meters. Design considerations: when laying out the 48-TQFP, dedicate short, impedance-controlled traces to the USB D+/D- pins, provide a 1uF decoupling capacitor on each VDD pin, and connect the NRST line through a 10k pull-up and a 100nF capacitor to ground for clean resets. This page synthesizes distributor pricing, drop-in TQFP-48 alternatives and practical design notes not collected in the manufacturer datasheet, giving procurement and engineering reviewers a single trusted reference.

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ATSAMD21G17D-AUT - ARM Cortex-M0+ 48MHz 128KB MCU | Microchip
ATSAMD21G17D-AUT

ATSAMD21G17D-AUT - ARM Cortex-M0+ 48MHz 128KB MCU | Microchip

The Microchip Technology ATSAMD21G17D-AUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, delivering 48 MHz CPU performance with 128 KB of Flash and 16 KB of SRAM in a 48-pin TQFP (7x7 mm) package. Designed for low-power embedded applications, this device integrates a Full-Speed USB 2.0 interface, a 12-bit SAR ADC with up to 20 channels, and configurable SERCOM peripherals that operate as I2C, SPI, or UART. The part is rated for the industrial temperature range (-40C to +85C) and ships in Tape-and-Reel packaging. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and peripheral interfaces onto one silicon die. The Cortex-M0+ is the most energy-efficient core in the ARM Cortex-M family, designed for deterministic real-time control at the lowest possible active and sleep current. Microcontrollers of this class bridge the gap between discrete 8-bit MCUs and higher-performance Cortex-M3/M4 parts, providing 32-bit compute at ultra-low power budgets. Key features of the ATSAMD21G17D-AUT include a 32.768 kHz low-power RTC with calendar mode, up to six SERCOM channels for flexible serial communication, a 10-bit DAC, and an Event System for inter-peripheral signalling without CPU intervention. The integrated Full-Speed USB transceiver eliminates the need for an external PHY, while the 12-bit ADC achieves up to 350 ksps. The device also includes a capacitive touch hardware controller, supporting button, slider, and wheel interfaces. The ATSAMD21G17D-AUT uses a Harvard architecture with separate code and data buses, an MPU for memory protection, and Microchip's Atmel START / MPLAB X IDE ecosystem. Power management is handled by multiple sleep modes (IDLE, STANDBY, BACKUP) that reduce quiescent current to single-digit microamps. Typical applications include USB Human Interface Devices (HID), home automation controllers, smart metering nodes, consumer wearables, and industrial sensor hubs. The combination of USB, capacitive touch, and 12-bit ADC makes it especially attractive for cost-sensitive IoT edge devices. When designing with this MCU, allocate a 1.5 KB bootloader region for double-tap firmware upgrades via USB and provide at least 4 uF bulk decoupling on VDDIN. For noise-sensitive analog measurements, use the dedicated AVDD pin with a ferrite bead and clean ground return. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21G17D-MF - 48MHz ARM Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21G17D-MF

ATSAMD21G17D-MF - 48MHz ARM Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21G17D-MF is a low-power, high-performance 32-bit ARM Cortex-M0+ flash microcontroller in the SAM D21G family, delivering 48 MHz CPU performance with 128 KB of flash and 16 KB of SRAM in a 48-pin QFN (7x7 mm) package. It integrates a full-speed USB 2.0 device, a 12-channel SERCOM subsystem, and advanced analog including a 12-bit 350 ksps ADC, two analog comparators, and a 10-bit DAC. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, and programmable peripherals. Within the broader system taxonomy, the ATSAMD21G17D-MF belongs to the Cortex-M0+ family -> ARM microcontrollers -> 32-bit microcontrollers -> embedded processors -> integrated circuits. The Cortex-M0+ core is designed for energy-efficient deterministic compute, making it ideal for always-on battery-powered designs where a more expensive M3/M4 core would be wasteful. Key differentiating features include 128 KB of self-programmable flash with 4 KB Read-While-Write area, 16 KB SRAM, six SERCOM ports (each configurable as I2C/SPI/USART), a 12-channel event system for CPU-off peripheral triggering, full-speed USB 2.0 with internal transceiver, a 32.768 kHz RTC, and a wide 2.73 V to 3.63 V supply range. The device also offers a 6-channel SERCOM-configurable timer/counter, two I2S interfaces for digital audio, and a capacitive touch (PTC) peripheral that supports up to 256 touch channels. The SAM D21G silicon uses a single-cycle hardware multiplier and a low-power SleepWalking architecture that allows peripherals to wake the CPU only on real events. Brown-out detection, supply voltage monitoring, and a watchdog timer with separate window ensure robust operation in industrial environments. Typical applications include USB HID peripherals, home automation hubs, smart metering, IoT sensor nodes, consumer electronics HMI, industrial sensor front-ends, and battery-powered wearables. The integrated USB 2.0 full-speed PHY removes the need for an external transceiver, reducing BOM cost for tethered devices. When designing with this part, route the USB DP/DM traces as a 90-ohm differential pair and decouple VDD with 100 nF plus 4.7 uF bulk capacitance close to each supply pin. Use Microchip's Atmel Studio 7 or MPLAB X with the SAMD21 Device Family Pack for IDE support, and the Atmel-ICE or SAM D21 Xplained Pro board for hardware debug. This page synthesizes current distributor stock, verified drop-in alternatives within the SAM D21G family, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAMD21G17D-MU - 128KB Flash Cortex-M0+ MCU 48MHz 48-QFN | Microchip
ATSAMD21G17D-MU

ATSAMD21G17D-MU - 128KB Flash Cortex-M0+ MCU 48MHz 48-QFN | Microchip

The Microchip Technology ATSAMD21G17D-MU is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21 family, featuring 128KB of flash and 16KB of SRAM in a 48-pin QFN (7x7 mm) package with exposed pad. It operates at up to 48 MHz and is qualified for industrial temperature ranges (-40C to +85C), making it suitable for home automation, consumer, metering, and industrial applications. According to the Microchip product page, the device is part of the Functional Safety (FuSa) capable SAM D21G line. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The ATSAMD21G17D belongs to the Cortex-M0+ family, which is the smallest and most energy-efficient ARM core, designed for embedded applications requiring low power consumption, deterministic interrupt response, and a rich peripheral set. Within the broader taxonomy, this device is a flash microcontroller, part of the 32-bit MCU class, and sits under the system hierarchy: MCU -> embedded processor -> semiconductor. The SAM D21 line specifically targets USB-enabled, low-power connected nodes. Key features include 128KB (128K x 8) flash with 4KB read-while-write (RWW) section, 16KB SRAM, full-speed USB 2.0 with embedded transceiver, up to six SERCOM serial communication interfaces, a 12-bit ADC with up to 20 channels, two analog comparators, and a 24-bit Event System for inter-peripheral signaling. The device supports capacitive touch via the Peripheral Touch Controller (PTC) for buttons, sliders, and wheels. Power features include an integrated buck/boost DC-DC converter and a SleepWalking mode that allows peripherals to wake the CPU only when needed. Architecturally, the ATSAMD21G17D uses an ARM Cortex-M0+ core with a single-cycle multiplier and a Microchip-defined peripheral set mapped through a unified AMBA bus. The 48 MHz core mark provides 0.93 DMIPS/MHz, delivering roughly 45 DMIPS - more than enough for sensor fusion, USB device stacks, and small HMI applications. The dual-bank flash layout supports safe in-application programming without blocking firmware execution. Typical applications include smart-home sensor hubs, USB HID peripherals (keyboard/mouse/joystick), industrial sensor nodes, smart meters, and wearable fitness devices. The full-speed USB on-chip PHY eliminates the external transceiver, reducing both BOM cost and PCB area. The wide operating voltage (1.62V-3.63V) simplifies designs powered directly from a single Li-ion cell. When designing with this MCU, account for the 48-pin QFN's exposed thermal pad which must be soldered to the ground plane for thermal and electrical performance. Use Microchip's MPLAB X with the SAM D21 device support pack, or the Arduino IDE with the corresponding board package, to program via SWD. This page synthesizes verified distributor pricing, drop-in compatible SAM D21G family variants, and practical design notes not consolidated in any single manufacturer document.

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ATSAMD21G17D-MUT - 48MHz ARM Cortex-M0+ MCU 128KB Flash QFN-48
ATSAMD21G17D-MUT

ATSAMD21G17D-MUT - 48MHz ARM Cortex-M0+ MCU 128KB Flash QFN-48

The Microchip Technology ATSAMD21G17D-MUT is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21G family with Functional Safety (FuSa) support, running at up to 48 MHz, with 128 KB Flash and 16 KB SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It integrates a full-speed USB 2.0 device interface, advanced analog (12-bit ADC, 10-bit DAC), multiple SERCOM peripherals, and a low-power architecture suited for battery-powered and always-on designs. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and programmable peripherals. The Cortex-M0+ is ARM's smallest and most energy-efficient application core, optimized for deterministic interrupt response and minimal silicon area. Within the broader taxonomy, the ATSAMD21G17D belongs to the ARM Cortex-M family -> 32-bit microcontrollers -> embedded microcontrollers -> integrated circuits. The SAM D21 family specifically targets low-power connected applications where USB connectivity, capacitive touch, and rich analog integration are required without a separate transceiver. Key features of the ATSAMD21G17D-MUT include a 48 MHz maximum CPU clock, 128 KB of self-programmable Flash with 4 KB read-while-write section, 16 KB SRAM, six SERCOM channels reconfigurable as UART/SPI/I2C, one full-speed USB 2.0 device port, two 12-bit ADCs (up to 350 ksps each), one 10-bit DAC, up to 38 GPIO, and a 32-bit RTC with calendar mode. Functional Safety (FuSa) features simplify IEC 60730 class B compliance for home appliances and white goods. Sleep currents are typically below 10 uA with full SRAM retention and RTC running. Architecturally, the SAM D21 uses a single-cycle hardware multiplier, an MPU for memory protection, an Event System for inter-peripheral signaling without CPU intervention, and a Peripheral Touch Controller (PTC) supporting capacitive buttons, sliders, and proximity sensors. The device supports SERCOM re-mapping, allowing the same peripheral block to serve multiple physical pin assignments, which simplifies PCB routing in space-constrained designs. Typical applications for the ATSAMD21G17D-MUT include home automation hubs, smart thermostats and metering, consumer wearables, low-cost sensor nodes, USB peripherals such as HID input devices and MIDI controllers, and industrial sensor interfaces. Its combination of USB device, ADC, DAC, and low-power modes makes it a versatile general-purpose MCU for connected embedded products. When designing with this MCU, ensure the exposed pad is soldered to a sufficient copper pour to meet the 4-layer thermal and electrical reference design; an inadequately grounded pad will degrade ADC noise performance and SERCOM signal quality. Use the on-chip 32 kHz crystal oscillator for RTC accuracy rather than the internal 8 MHz trimmed RC for time-keeping. This page synthesizes distributor pricing from DigiKey/Mouser, drop-in alternatives within the SAM D21 family, and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop reference for the ATSAMD21G17D-MUT.

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ATSAMD21G17L-MFT - 128KB Flash Cortex-M0+ MCU, 48MHz, QFN-48 | Microchip
ATSAMD21G17L-MFT

ATSAMD21G17L-MFT - 128KB Flash Cortex-M0+ MCU, 48MHz, QFN-48 | Microchip

The Microchip Technology ATSAMD21G17L-MFT is an AEC-Q100 qualified, ARM Cortex-M0+ based 32-bit flash microcontroller delivering 48 MHz CPU performance with 128KB of embedded Flash and 16KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed thermal pad. The device integrates a rich peripheral set including SERCOM (configurable serial communication), 14 ADC channels at 12-bit resolution, multiple timer/counter units, and a full-speed USB 2.0 device interface, making it a versatile automotive-grade MCU for lighting, motor control, and industrial applications. Key specifications include 1.62V to 3.63V operating voltage, 6 SERCOM interfaces (each configurable as I2C/SPI/UART), a 12-bit ADC with up to 1 MSPS sampling, two I2S interfaces, and a hardware cryptographic engine on selected variants. The device supports SleepWalking peripherals and Event System for low-power operation without CPU intervention, drawing as little as [DATA_NEEDED: sleep current] in deep-sleep modes. AEC-Q100 Grade 1 qualification supports operation from -40C to +125C ambient, suitable for under-hood automotive electronics. The ATSAMD21G17L-MFT leverages the SAM D21 architecture featuring the Cortex-M0+ core with single-cycle I/O access, deterministic interrupt handling via the Nested Vectored Interrupt Controller (NVIC), and Microchip's Atmel Start / MPLAB X ecosystem for code generation. The device includes a 32-bit Real-Time Counter with calendar mode, supply voltage scaling, brown-out detection, and a Watchdog Timer with window mode for safety-critical applications. Typical applications include LED lighting controllers (the L-suffix designates lighting-optimized firmware and peripherals), automotive body electronics, BLDC motor control, IoT edge nodes, and industrial sensor hubs. The integrated USB 2.0 Full-Speed device port enables HID-class peripherals, CDC virtual COM ports, and vendor-class devices without an external PHY. The QFN-48 package footprint is shared across the SAM D21G family, simplifying PCB migration between memory-density variants. When designing with this part, observe the recommended decoupling scheme: one 100 nF X7R capacitor per VDD pin plus a bulk 4.7 uF tantalum or ceramic capacitor. The exposed thermal pad (EP) must be soldered to a continuous ground plane for thermal dissipation and to meet the package's electrical ground reference. Programming is supported through SWD (Serial Wire Debug) on the SWDIO/SWDCLK pins, and the device is firmware-compatible with the broader ATSAMD21 family. This page synthesizes distributor pricing, AEC-Q100 cross-references, and SAM D21 design notes not found in the standalone manufacturer datasheet.

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ATSAMD21G17L-MNT - SAM D21G Cortex-M0+ MCU 128KB Flash 48-QFN | Microchip
ATSAMD21G17L-MNT

ATSAMD21G17L-MNT - SAM D21G Cortex-M0+ MCU 128KB Flash 48-QFN | Microchip

The Microchip Technology ATSAMD21G17L-MNT is an ARM Cortex-M0+ based SAM D21G microcontroller running up to 48 MHz, integrating 128 KB of Flash and 16 KB of SRAM in a 48-pin QFN (7x7 mm) package with exposed pad. As a member of Microchip's SAM D21 family, it combines high-performance 32-bit processing with Microchip's peripheral touch controller (PTC) and SERCOM serial interfaces, while maintaining class-leading active and sleep power consumption for lighting and IoT end-node designs. A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals such as timers, communication interfaces and ADCs. Within the broader taxonomy, an MCU belongs to the semiconductor category, then to microcontrollers, then to ARM Cortex-M class devices, and finally to the Cortex-M0+ sub-class - the smallest, most energy-efficient ARM core designed for deterministic real-time control. The ATSAMD21G17L sits at the entry point of the SAM D20/D21 family, balancing memory, pin count, and peripheral mix for cost-sensitive applications. The device features 128 KB of in-system programmable Flash with 4 KB read-while-write (RWW) capability, 16 KB SRAM, a 12-bit 350 ksps ADC with up to 20 channels, two analog comparators, six SERCOM modules configurable as UART/SPI/I2C, a USB 2.0 Full-Speed device (no PHY needed), up to 38 GPIO, a 24-bit PWM timer counter, and a hardware peripheral touch controller supporting capacitive buttons, sliders, and wheel sensing. The integrated PTC enables touch-driven UI without an external touch IC, lowering BOM cost in HMI applications. Architecturally, the ATSAMD21G17L uses Microchip's event system for inter-peripheral signaling without CPU intervention, a 6-channel DMA controller to offload data movement, and an interrupt controller supporting up to 16 priority levels. The USB module integrates a 3.3 V regulator and transceiver, allowing direct bus-powered designs. Cryptographic accelerators are not present on the 'G17' part - those are reserved for the D21 'E' and 'J' variants - which keeps pricing low for lighting and metering applications that do not require on-chip crypto. Typical applications include LED lighting controllers with capacitive touch dimmers, USB-CDC virtual COM-port bridges, smart-home sensor hubs, IoT end nodes using UART/SPI peripherals, and consumer devices requiring small form-factor MCUs. The wide 1.62 V to 3.63 V operating range lets the same part work from a single Li-ion cell, two AA cells, or a regulated 3.3 V rail. Combined with 105 C maximum junction temperature support (L-suffix), the MNT suffix (tape-and-reel, matte-Sn finish) is qualified for high-volume manufacturing. When designing with this device, pay close attention to PCB layout of the exposed pad (EP) - it must be soldered to a continuous ground plane for thermal dissipation and electrical reference, and decoupling must use at least 100 nF + 4.7 uF per VDD pin. For USB applications, the D+/D- traces require 90-ohm differential impedance, and the 48 MHz core must be sourced from a 32.768 kHz crystal via the DFLL or from the internal 8 MHz oscillator trimmed to +/- 2%. This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Heisener, drop-in same-brand SAM D21 alternatives, and practical design notes not aggregated elsewhere.

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ATSAMD21G18A-AF - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip
ATSAMD21G18A-AF

ATSAMD21G18A-AF - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip

The Microchip Technology ATSAMD21G18A-AF is a 32-bit ARM Cortex-M0+ based microcontroller from the SAM D21 family, operating up to 48 MHz with 256 KB of Flash and 32 KB of SRAM, housed in a 48-pin TQFP (7x7 mm) package. It is targeted at low-power, high-performance embedded applications such as home automation, consumer electronics, metering, and industrial control. The part integrates advanced analog, PWM, and SERCOM peripherals that support flexible serial communication, including I2C, SPI, and UART. What is a Cortex-M0+ microcontroller? A Cortex-M0+ microcontroller is an ARM-based 32-bit processor core designed for energy-efficient embedded computing. It belongs to the Cortex-M family of microcontrollers, which sit within the broader category of microcontrollers and, at the top level, integrated circuits. The Cortex-M0+ uses a 2-stage pipeline with a Thumb/Thumb-2 instruction subset, delivers deterministic interrupt response, and offers significantly higher DMIPS/mW than 8-bit AVR or 8051 alternatives, making it ideal for battery-powered IoT nodes and portable consumer products. Key features of the ATSAMD21G18A-AF include a full-speed USB 2.0 device with on-the-go (OTG) support, a 12-bit 350 ksps ADC, a 10-bit 350 ksps DAC, up to six SERCOM channels, and up to five 16-bit Timer/Counters. The device also integrates a 12-channel DMA controller, a 12-channel Event System, and two-pin Serial Wire Debug (SWD) for programming and boundary-scan. It supports SleepWalking peripherals, idle and standby sleep modes, and is pin-compatible with the SAM D20 family for simple migration. The ATSAMD21G18A-AF uses a single 1.62V to 3.63V supply rail and offers multiple low-power modes that drop quiescent current to a few microamps in standby. The integrated full-speed USB PHY eliminates the need for an external transceiver, simplifying USB-enabled designs. The peripheral Event System and DMAC allow data movement without CPU intervention, enabling deterministic response and freeing the core for application logic. Typical applications include smart-home sensor hubs, IoT edge nodes, industrial HMI panels, low-power wireless sensor platforms, and battery-powered consumer devices such as fitness wearables. The device is also widely used in maker and education platforms, including Arduino-compatible boards that leverage its native USB, capacitive touch, and PWM peripherals. When designing with the ATSAMD21G18A-AF, ensure the VDD decoupling network includes a 100 nF capacitor close to each supply pin and a bulk 4.7 uF capacitor to handle USB inrush current. Plan the boot loader pin (BOOTPROT) configuration early if field firmware updates are required, and reserve a dedicated SWD header for in-circuit debugging. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAMD21G18A-AFT - 48MHz ARM Cortex-M0+ MCU, 256KB Flash, 48-TQFP
ATSAMD21G18A-AFT

ATSAMD21G18A-AFT - 48MHz ARM Cortex-M0+ MCU, 256KB Flash, 48-TQFP

The Microchip Technology ATSAMD21G18A-AFT is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21G family, operating up to 48 MHz with 256 KB Flash and 32 KB SRAM in a 48-pin TQFP (7x7 mm) package. It integrates a rich peripheral set including a 12-channel DMAC, 12-channel Event System, up to five 16-bit Timer/Counters (TC), a full-speed USB 2.0 device/host interface, up to six SERCOM serial communication modules, a 12-bit ADC, 10-bit DAC, and analog comparators. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and peripheral interfaces such as ADC, timers, and communication blocks. Within the broader hierarchy, the ATSAMD21G18A belongs to the ARM Cortex-M0+ 32-bit MCU class -> low-power MCU -> embedded microcontroller -> semiconductor IC family. The Cortex-M0+ core is the smallest and most energy-efficient member of the ARM Cortex-M family, designed for deterministic embedded control with Thumb-2 instruction set support and single-cycle I/O port access. Key features of the ATSAMD21G18A-AFT include a 1.62 V to 3.63 V operating voltage range, two-pin Serial Wire Debug (SWD) interface for programming and test, SleepWalking peripherals, Idle and Standby sleep modes, and functional-safety (FuSa) documentation support for IEC 60730 Class B compliance. The 48-TQFP package supports an extended industrial temperature range of -40 °C to +125 °C, indicated by the 'F' suffix code in the ordering part number. The device achieves 2.46 CoreMark/MHz and is designed for simple, intuitive migration within the SAM D21 family using identical peripheral modules, hex-compatible code, and a shared linear address map. The -AFT ordering code (48-TQFP, Tape and Reel, -40 °C to +125 °C) makes it a long-lifecycle option for industrial and consumer products. Typical applications include home automation endpoints, smart metering, consumer electronics, industrial sensor hubs, USB HID peripherals, and low-power IoT nodes. The integrated USB 2.0 Full-Speed controller eliminates the need for an external bridge IC, simplifying BOM and firmware. When designing with the ATSAMD21G18A-AFT, ensure the SWD interface is brought out to a debug header for programming and field updates, and observe the recommended decoupling scheme (one 0.1 µF per VDD pin plus a bulk capacitor) to keep the ADC and DAC noise floors within datasheet limits. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21G18A-AU - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip
ATSAMD21G18A-AU

ATSAMD21G18A-AU - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip

The Microchip Technology ATSAMD21G18A-AU is a low-power, high-performance 32-bit ARM Cortex-M0+ flash microcontroller operating at up to 48 MHz, integrating 256 KB of Flash and 32 KB of SRAM in a 48-pin TQFP (7x7 mm) package. It is part of Microchip's SAM D21G family with Functional Safety (FuSa) support, targets home automation, consumer electronics, smart metering, and industrial sensor systems, and remains footprint-compatible with the SAM D20 family for design migration. A microcontroller (MCU) is a compact integrated circuit that combines a processor core, volatile and non-volatile memory, and programmable peripherals to govern a specific operation in an embedded system. The ARM Cortex-M0+ is an energy-optimised 32-bit core engineered for low-cost, low-power designs, and the ATSAMD21G18A-AU sits inside Microchip's SMART ARM-based SAM D21 family within the broader hierarchy of microcontrollers -> embedded processors -> semiconductors -> integrated circuits. This positions it as a general-purpose control plane for connected, battery-aware products. Key features include a 12-channel Direct Memory Access Controller (DMAC), a 12-channel Event System for inter-peripheral signalling without CPU wake-up, up to five 16-bit Timer/Counters, a two-pin Serial Wire Debug (SWD) interface, a Peripheral Touch Controller (PTC) supporting up to 256 channels of capacitive touch and proximity sensing, and up to 52 programmable I/O pins. Idle and Standby sleep modes with SleepWalking peripherals enable current-conscious designs, while multiple SERCOM instances are independently configurable as USART, SPI, or I2C. Functional Safety (FuSa) support and a 12-bit ADC/DAC round out the mixed-signal capability set. The architecture combines a deterministic Cortex-M0+ pipeline at 2.46 CoreMark/MHz with a flexible Event System that lets peripherals trigger each other autonomously, reducing active CPU time and energy budget. Supply voltage ranges from 1.62 V to 3.63 V, the part is RoHS-compliant (green package), and it offers a hardware-touch peripheral for capacitive buttons, sliders, and wheels. This silicon is at the heart of Arduino Zero and MKR-series boards, which explains its popularity in prototyping, education, and Maker-style deployments where low power and rich peripherals both matter. Typical applications include home automation controllers, smart energy meters, industrial sensor nodes, and battery-powered wearables or IoT end devices. The part also fits capacitive-touch human-machine interfaces and low-power wireless sensor nodes when paired with an external radio. When designing with this MCU, decouple every VDD pin with 100 nF placed close to the pin and add at least one 10 uF bulk capacitor on the main rail. Bring SWDIO and SWCLK out to a header for programming and debugging, and use Standby sleep with SleepWalking peripherals to minimise quiescent draw on battery-powered products. This page synthesises authorised distributor pricing, same-package drop-in alternatives, and practical design notes that complement (rather than duplicate) the manufacturer datasheet.

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ATSAMD21G18A-MF - 48MHz Cortex-M0+ MCU, 256KB Flash | Microchip
ATSAMD21G18A-MF

ATSAMD21G18A-MF - 48MHz Cortex-M0+ MCU, 256KB Flash | Microchip

The Microchip ATSAMD21G18A-MF is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21 family, integrating 256KB of Flash, 32KB of SRAM, a 48MHz maximum CPU clock, and a full-speed USB 2.0 device/host interface, housed in a 48-pin QFN (7x7 mm) package rated for the -40C to +125C industrial temperature range. The -MF suffix specifies the QFN-48 footprint supplied in tray packaging. A 32-bit ARM Cortex-M0+ microcontroller is a low-power, low-cost processor core built on the ARMv6-M architecture that delivers 0.9 DMIPS/MHz while consuming only a few hundred microamps per megahertz. Microcontrollers (MCUs) integrate the CPU core, non-volatile memory (Flash), volatile memory (SRAM), and a rich set of peripherals (ADC, timers, communication blocks, GPIOs) on a single chip. Within the broader system hierarchy, the SAM D21 family sits inside Microchip's Atmel-SMART 32-bit MCU line -> ARM Cortex-M microcontrollers -> 32-bit microcontrollers -> embedded processors -> semiconductors. Key features include a 12-channel 12-bit 350ksps ADC with hardware oversampling, six SERCOM channels independently configurable as UART, SPI, or I2S, two I2S interfaces for digital audio, a 20-channel Event System for inter-peripheral signaling without CPU intervention, two analog comparators, a 24-bit timer/counter for control applications, and a hardware AES-256 crypto accelerator. The device operates from 1.62V to 3.63V, supporting single-cell Li-ion and coin-cell battery designs. Architecturally, the SAM D21 uses a single-cycle hardware multiplier, an NVIC with four priority levels, and a Memory Protection Unit (MPU) for system robustness. Sleepwalking peripherals plus the Event System let the CPU stay in deep-sleep (less than 5 microamps) while peripherals react to external events. The integrated 48MHz digital frequency-locked loop (DFLL48M) generates a stable CPU clock from the internal 32.768kHz oscillator. Typical applications include USB human-interface devices (HID) and CDC virtual COM ports, home automation and connected sensors, consumer wearables with battery charging control, industrial sensor hubs with analog front ends, smart metering nodes, and low-power wireless sensor nodes pairing the SAM D21 with an external sub-GHz or BLE radio. The QFN-48 footprint is widely adopted on Arduino-compatible and Feather-style development boards. Design consideration: the ATSAMD21G18A-MF requires an external 32.768kHz crystal or the internal OSCULP32K oscillator for accurate USB Full-Speed operation. The exposed pad (EP) on the QFN must be soldered to a sufficient ground plane to meet the thermal conductivity spec; bulk decoupling of at least one 10uF and one 100nF ceramic capacitor close to VDD and VDDCORE pins is mandatory for reliable ADC and USB operation. This page synthesizes distributor stock data, parametric alternatives, and practical PCB design guidance not assembled in the manufacturer datasheet alone, helping engineers select, source, and lay out the ATSAMD21G18A-MF faster.

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ATSAMD21G18A-MU - 256KB Flash Cortex-M0+ MCU, 48MHz | Microchip
ATSAMD21G18A-MU

ATSAMD21G18A-MU - 256KB Flash Cortex-M0+ MCU, 48MHz | Microchip

The Microchip ATSAMD21G18A-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, featuring 256KB of Flash and 32KB of SRAM, running at up to 48 MHz, housed in a 48-pin QFN (7x7 mm) package. It is part of the Functional Safety (FuSa) line, supporting IEC 60730 Class B safety requirements. The part operates from a wide 1.62V to 3.6V supply and integrates a full-speed USB 2.0 device interface, a 12-channel SERCOM-configurable serial set, up to six SERCOM interfaces, and a 14-channel event system for inter-peripheral signaling. A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable input/output peripherals. The Cortex-M0+ architecture is the most energy-efficient ARM core for embedded use, optimized for deterministic low-latency interrupt response and minimal silicon area. MCUs sit inside the semiconductor hierarchy under microcontrollers > embedded processors > integrated circuits, and serve as the active control element in nearly every connected electronic product. Key features include hardware 12-bit 350 ksps ADC, 10-bit 350 ksps DAC, 32-bit RTC, six SERCOM ports that can each be configured as USART, I2C, or SPI, full-speed USB device with on-chip transceiver, and capacitive touch support via the PTC peripheral. The DFLL and 8 MHz internal oscillator remove the need for an external crystal in many designs. Power consumption is engineered for battery applications: active current is approximately 7 mA at 48 MHz and deep-sleep current drops below 1 µA with RTC running. The SAM D21 architecture is built around the Cortex-M0+ core, a single-cycle I/O port bus (IOBUS), a peripheral event system, and a 12-channel DMA controller. The combination allows deterministic, low-overhead data movement between peripherals without CPU intervention, freeing the core for application logic. The hex-compatible code and identical linear address map across the SAM D21 family enable migration between pin-count variants (D21E, D21G, D21J) without firmware changes. Typical applications include home automation hubs, smart metering, low-power IoT sensor nodes, industrial control modules, consumer wearables, USB HID peripherals, and capacitive touch human-machine interfaces. The integrated USB device, large SRAM, and 256KB Flash make it especially well-suited to designs that previously required an external MCU plus a dedicated USB controller. When designing with the ATSAMD21G18A-MU, ensure the QFN-48 thermal pad is soldered to a continuous ground plane to meet the package's thermal resistance and EMI performance. Place the 32.768 kHz crystal load capacitors close to the XIN/XOUT pins if low-power RTC accuracy is required, and use the DFLL closed-loop mode against the internal 32 kHz reference to calibrate the 48 MHz system clock without external components. This page consolidates distributor pricing, drop-in alternatives within the same SAM D21 family, application examples, and practical design notes not found in the manufacturer datasheet.

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