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ATSAMD21G15B-MF - 32KB Flash Cortex-M0+ MCU | Microchip 48-QFN
ATSAMD21G15B-MF

ATSAMD21G15B-MF - 32KB Flash Cortex-M0+ MCU | Microchip 48-QFN

The Microchip Technology ATSAMD21G15B-MF is a 32-bit ARM Cortex-M0+ microcontroller in the SAM D21 family, integrating 32KB of in-system self-programmable Flash and 4KB of SRAM into a 48-pin QFN (7x7 mm) package. It runs at up to 48 MHz, achieving 2.46 CoreMark/MHz, and operates from a 1.62 V to 3.63 V supply. The device carries Functional Safety (FuSa) capability, making it suitable for safety-critical embedded designs. 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 such as timers, communication interfaces, and analog blocks. Mixers sit at the heart of embedded systems, hierarchically classified as: microcontroller -> embedded processor -> semiconductor IC -> electronic component. The Cortex-M0+ is ARM's most energy-efficient application-processor core, and the SAM D21 family targets low-power IoT, sensor hubs, and human-machine interface (HMI) nodes. Key features of the ATSAMD21G15B-MF include a single-cycle hardware multiplier, a Micro Trace Buffer for lightweight instruction tracing, a 12-channel Direct Memory Access Controller (DMAC), and a 12-channel Event System for inter-peripheral signaling without CPU intervention. The peripheral set includes one 16-bit and one 8-bit Timer/Counter (TC) with compare/capture channels, multiple Serial Communication Interfaces (SERCOM) configurable as UART/SPI/I2C, a 12-bit ADC, a 10-bit DAC, and a full-speed USB 2.0 device port. Idle and Standby sleep modes with SleepWalking peripherals minimize system-level consumption. Architecturally, the SAM D21 uses an advanced 65 nm low-power CMOS process and a Harvard bus architecture, separating instruction and data paths to sustain deterministic zero-wait-state Flash execution at 48 MHz. The integrated voltage regulator supports a single 3.3 V rail operation, and brown-out detection plus power-on reset guarantee clean startup across industrial temperature ranges (up to 125 °C). Typical applications include IoT sensor nodes, low-power wireless modules, USB human-interface devices (HIDs), industrial control loops, and battery-powered wearables. The combination of USB, ADC, and SleepWalking peripherals makes the part a strong fit for connected devices that must wake, measure, transmit, and return to deep sleep with minimum energy. When designing with this device, ensure the 48-QFN exposed pad is soldered to a sufficiently large ground copper pour for thermal dissipation, and follow the Microchip SAM D21 Family datasheet guidelines for the decoupling network (typically 100 nF + 4.7 µF bulk near VDDIN). The two-pin Serial Wire Debug (SWD) interface requires pull-up resistors on SWDIO and SWCLK per the ARM CoreSight specification. This page synthesizes verified distributor pricing, drop-in compatible SAM D20/SAM D21 alternatives, and practical design notes that are not aggregated in the manufacturer datasheet alone.

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ATSAMD21G15B-MU - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
ATSAMD21G15B-MU

ATSAMD21G15B-MU - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip

The Microchip ATSAMD21G15B-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, featuring 32KB of in-system self-programmable Flash, 4KB SRAM, and a maximum CPU clock of 48MHz (achieving up to 2.46 CoreMark/MHz). It is housed in a 48-pin QFN (7x7 mm) package with an industrial operating temperature range of -40C to +85C and is supplied from a single 3.3V rail. The device is qualified for functional safety (FuSa) use cases and supports a Micro Trace Buffer for lightweight instruction trace. A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory, working RAM, and a rich set of programmable peripherals on a single die. It sits below microprocessors in the system hierarchy in the sense that MCUs integrate the memory and I/O controllers on-chip, reducing bill-of-materials cost and PCB area. Within that hierarchy, the SAM D21G family belongs to the Cortex-M0+ class - the most energy-efficient ARM core - positioned above 8-bit AVR/PIC parts but below Cortex-M4F parts in compute capability. This positioning makes it ideal for battery-powered and cost-sensitive IoT endpoints. Key differentiating features of the ATSAMD21G15B-MU include its 12-channel Direct Memory Access (DMAC) controller, 12-channel Event System for inter-peripheral signaling without CPU intervention, and SleepWalking peripherals that allow I/O events to wake selected functions while the CPU remains idle. The device also provides a single 16-bit Timer/Counter plus an 8-bit Timer/Counter with compare/capture channels, a full-speed USB 2.0 device/host with on-the-go support, and a two-pin Serial Wire Debug (SWD) interface for programming and test. Architecturally, the SAM D21 uses a single-cycle hardware multiplier, a true low-power RTC with calendar mode, and a brown-out detector with multiple programmable thresholds. Power-on reset (POR) is integrated, and Idle/Standby sleep modes - combined with SleepWalking peripherals - typically achieve standby currents below 5 uA. The 48-pin QFN (7x7 mm) variant provides all SERCOM, ADC, DAC, and USB pins with a thermal pad for improved dissipation. Typical applications include IoT sensor nodes, BLE/BLE+MCU combo board controllers, USB HID devices, industrial sensor hubs, low-cost home automation, wearable fitness bands, and battery-powered data loggers. Designers choose this part when they need Cortex-M0+ simplicity, USB connectivity, and strong low-power behavior at a price below Cortex-M4F parts. Key design considerations include providing a 1 uF + 100 nF decoupling network near VDD pins, routing the exposed thermal pad to a continuous ground pour for thermal/electrical performance, and using the integrated DFLL or 32.768 kHz crystal mode for accurate USB SOF timing. Migrating from SAM D20 to SAM D21 keeps the same peripheral set but adds USB and richer DMA routing. This page synthesizes verified distributor pricing, drop-in alternatives from Microchip's own family tree, and practical PCB/thermal design notes not present in the datasheet summary, giving engineers a single page for sourcing, replacement, and bring-up decisions.

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ATSAMD21G15B-MUT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
ATSAMD21G15B-MUT

ATSAMD21G15B-MUT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip

The Microchip Technology ATSAMD21G15B-MUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family with Functional Safety (FuSa) support, 32KB of in-system self-programmable Flash and 4KB of SRAM, running at up to 48 MHz and housed in a 48-pin QFN (7x7 mm) package. The device delivers 2.46 CoreMark/MHz, integrates a single-cycle hardware multiplier and Micro Trace Buffer, and is drop-in compatible with the SAM D20 family. Tape and reel packaging supports high-volume SMT assembly. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O on one die. The Cortex-M0+ is the smallest, most energy-efficient member of the ARM Cortex-M family and targets deeply embedded, low-power applications where deterministic interrupt response and ease of programming in C are priorities. Microcontrollers sit below microprocessors in the embedded hierarchy and above digital logic in system-on-chip integration. Key features include a 12-channel Direct Memory Access (DMAC) controller, a 12-channel Event System, two-pin Serial Wire Debug (SWD), Idle and Standby sleep modes, SleepWalking peripherals, Power-on Reset (POR) and Brown-Out Detection (BOD), a 48 MHz Digital Frequency Locked Loop (DFLL48M) plus 48 MHz to 96 MHz Fractional Digital Phase-Locked Loop (FDPLL96M), 16 external interrupts plus one non-maskable interrupt, and advanced PWM plus analog peripherals including a 12-bit ADC and a 10-bit DAC. The SAM D21 architecture combines the Cortex-M0+ core with a high-bandwidth AHB/APB bus matrix, low-power SERCOM modules configurable as UART/SPI/I2C, and a full-speed USB 2.0 device with embedded transceiver. Functional Safety (FuSa) variants add diagnostic libraries and safety documentation targeted at IEC 60730 Class B / UL 1998 household appliance safety standards. Typical applications include low-power IoT sensor nodes, USB HID peripherals, consumer appliances requiring functional safety, wearable fitness devices, and industrial control panels. The 48-pin QFN footprint with SAM D20 drop-in compatibility enables seamless migration when additional memory or peripherals are needed. When designing with this device, ensure the 48 MHz maximum CPU clock is respected and that the DFLL is calibrated against the 48 MHz internal oscillator after POR for accurate USB baud rates. The 1.62 V to 3.63 V operating range supports both 1.8 V and 3.3 V rails; brown-out detection should be enabled for battery-powered designs. This page synthesizes distributor pricing, same-family drop-in alternatives from the Site MPN list, parametric comparison data and practical design notes that go beyond the manufacturer datasheet's headline specifications.

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

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

The Microchip Technology ATSAMD21G16B-AFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, featuring 64KB of Flash and 8KB of SRAM, operating at up to 48 MHz in a 48-pin TQFP (7x7 mm) package. It integrates a full set of advanced peripherals including a 12-bit ADC, 10-bit DAC, multiple SERCOM interfaces, and a 24-channel Event System, all while maintaining Microchip's signature low-power architecture. The device operates from 1.62V to 3.63V supply and is qualified for -40C to +125C industrial temperature range. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (RAM), and configurable peripherals. The ARM Cortex-M0+ is the most energy-efficient core in the ARM Cortex-M family, optimized for low-power embedded applications where deterministic real-time response, small code footprint, and minimal active current are essential. The SAM D21 series uses a Harvard bus architecture with separate code and data buses, enabling simultaneous fetch and memory access for higher throughput at lower clock rates. Key differentiating features include 6 SERCOM modules (each independently assignable as UART, SPI, or I2C), a 12-bit 350ksps ADC with up to 14 analog channels, a 10-bit 350ksys DAC, and a USB 2.0 Full-Speed device interface with integrated PHY. The device supports Sleepwalking peripherals and Sleep Modes (Idle, Standby, Backup, and Off), with wake-up times under 5 us from Standby, making it suitable for battery-powered sensor nodes and always-on IoT edge devices. Typical applications include IoT sensor nodes, wearable fitness bands, consumer appliance control panels, USB human-interface devices (HIDs), and low-cost industrial control modules. The SAM D21 ecosystem is supported by Microchip Studio 7, Atmel START, and the MPLAB X IDE toolchain, with a rich library of software framework examples and middleware (ASF v3 / Microchip CodeVision / Harmony 3) that accelerate firmware development. The 48-TQFP package provides easy hand-soldering and breadboard-friendly 0.5 mm pitch pads, which is convenient for prototype work. This page synthesizes distributor pricing, drop-in SAMD21 alternatives, and practical design notes not found on the manufacturer product page, with cross-brand cross-references sourced from live distributor data. Pricing reflects current market rates as of 2026-09-21 and may vary by quantity break and supplier allocation.

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ATSAMD21G16B-AU - 48MHz ARM M0+ MCU 64KB Flash 48-TQFP | Microchip
ATSAMD21G16B-AU

ATSAMD21G16B-AU - 48MHz ARM M0+ MCU 64KB Flash 48-TQFP | Microchip

The Microchip Technology ATSAMD21G16B-AU is a 32-bit ARM Cortex-M0+ microcontroller in the SAM D21G family, featuring 64KB in-system self-programmable Flash, 8KB SRAM, and a 48-pin TQFP (7x7 mm) industrial-grade package operating up to 48 MHz with 2.46 CoreMark/MHz. The device integrates a single-cycle hardware multiplier, Micro Trace Buffer, 16 external interrupts through the External Interrupt Controller, and a Two-pin Serial Wire Debug interface for programming and boundary-scan. It is a drop-in upgrade for the legacy SAM3N/SAM3S designs in the same SAM D21 pinout family. What is an ARM Cortex-M0+ microcontroller? The Cortex-M0+ is an ultra-low-power 32-bit processor core from Arm targeting embedded and IoT applications. Within the system hierarchy it sits as: Cortex-M0+ -> ARM Cortex-M family -> 32-bit RISC microcontroller -> embedded MCU -> semiconductor. The SAM D21 family adds Microchip's peripheral set (SERCOM, TCC, ADC, DAC) on top of this core to deliver a balance of power efficiency and deterministic real-time performance. Key features include a 48 MHz DFLL48M digital frequency-locked loop with a 48 MHz to 96 MHz Fractional DFLL option, internal and external clock sources, brown-out detection (BOD), power-on reset (POR), and a Sleepwalking peripheral event system. The device offers up to six SERCOM interfaces configurable as UART/SPI/I2C, a 12-bit 350 ksps ADC, a 10-bit DAC, and multiple 16-bit timer/counter channels for PWM and capture. Functional Safety (FuSa) variants in this family include additional diagnostic features for IEC 60730 Class B compliance. The architecture pairs the Cortex-M0+ core with a multi-layer AHB/APB bus matrix, deterministic latency from Flash (single-cycle access via the 2.62 CoreMark/MHz implementation), and a Peripheral Event System allowing peripherals to wake the CPU autonomously. The integrated Full-Speed USB 2.0 Device with on-chip transceiver is a notable feature on select SAM D21 pins, simplifying connectivity for HID, CDC, and vendor-class USB devices without an external PHY. Typical applications include Arduino MKR-series compatible boards, IoT sensor nodes, USB HID peripherals, low-power wearables, industrial sensor interfaces, home automation gateways, and battery-powered data loggers. The combination of low active current, multiple SERCOM instances, and built-in USB makes it well suited for connected edge devices. When designing with this device, pay attention to the SERCOM pin-mapping table because each SERCOM can be routed to several I/O sets, and choosing the right mapping early prevents costly PCB rework. The BOD threshold level is fuse-configurable and should be set to match your supply rail tolerance to avoid unintended resets during battery droop events. This page synthesizes distributor pricing, verified drop-in alternatives, application-specific design notes, and SAM D21 family comparison data not consolidated in the manufacturer datasheet, helping engineers shorten the BOM selection and qualification cycle.

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

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

The Microchip ATSAMD21G16B-AUT is a 32-bit ARM Cortex-M0+ microcontroller (SAM D21G family, Functional Safety variant) with 64KB Flash, 8KB SRAM, running up to 48 MHz, packaged in a 48-pin TQFP (7x7 mm). Operating from 1.62 V to 3.63 V, it integrates a rich peripheral set including SERCOM, ADC, DAC, and PWM timers for mixed-signal embedded designs. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (SRAM), and on-chip peripherals. The SAM D21 series uses the ARM Cortex-M0+ core, the smallest and most energy-efficient of the ARM Cortex-M family, designed for deterministic real-time control in cost- and power-sensitive applications. Cortex-M0+ -> ARM Cortex-M -> 32-bit RISC core -> microcontroller -> integrated circuit -> semiconductor. The D21 family is a member of Microchip's SAM family of low-power Cortex-M microcontrollers. Key features of the ATSAMD21G16B-AUT include six SERCOM serial-communication interfaces (each configurable as UART/SPI/I2C), a 12-bit 1 MSPS ADC with up to 20 channels, a 10-bit 350 kSPS DAC, six 16-bit Timer/Counters, and a full-speed USB 2.0 device/host interface. The device achieves 2.46 CoreMark/MHz and supports the Functional Safety (FuSa) feature set intended for IEC 60730 class B safety applications. The ATSAMD21G16B-AUT's SleepWalking peripherals and Event System allow the CPU to remain idle while I/O events are serviced autonomously, reducing active-mode current to a minimum and supporting battery-powered designs. The 48-pin TQFP footprint exposes 38 GPIO, all interrupt-capable with configurable pull-ups and drive strength. Typical applications include IoT sensor nodes, consumer wearables, USB Human Interface Devices (HID), industrial control front-ends, and home-automation controllers. The combination of Cortex-M0+ efficiency, USB FS, and advanced analog suits designs that need clean signal acquisition and wired communication on a tight power budget. When designing with the ATSAMD21G16B-AUT, follow the reference PCB layout in the SAM D21 datasheet: place the decoupling capacitor within 3 mm of VDDCORE pin 5 and add a 4.7 uF bulk capacitor on VDDIN. Use the Atmel-ICE or Curiosity Nano board for programming and debugging over SWD. This page synthesizes verified distributor pricing, drop-in compatible SAMD21 / SAM3 variants, and practical design notes not found in the manufacturer datasheet.

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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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