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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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ATSAMD21G18A-MUT - ARM Cortex-M0+ 48MHz 256KB Flash MCU
ATSAMD21G18A-MUT

ATSAMD21G18A-MUT - ARM Cortex-M0+ 48MHz 256KB Flash MCU

The Microchip Technology ATSAMD21G18A-MUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21G family, integrating 256 KB of Flash, 32 KB of SRAM, and a 48 MHz CPU core in a 48-pin QFN (7x7 mm) package. It delivers 2.46 CoreMark/MHz, includes native full-speed USB 2.0 with on-chip transceiver, and supports 1.62 V to 3.63 V supply operation. The part is supplied on Tape & Reel for high-volume SMT assembly. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (Flash), working memory (SRAM), and programmable I/O peripherals. The ATSAMD21G18A belongs to the ARM Cortex-M0+ class - the smallest and most energy-efficient 32-bit core in the ARM Cortex-M family - which targets cost-sensitive embedded applications that previously used 8-bit or 16-bit MCUs while delivering significantly higher code density, deterministic interrupt response, and modern toolchain support. Within the taxonomy: microcontroller -> embedded processor -> semiconductor device, the Cortex-M0+ sits at the low-power / low-cost end of the ARM-M lineup. Key features of the ATSAMD21G18A-MUT include: up to 38 GPIO with peripheral touch capability (PTC), a 12-channel DMA controller, a 12-channel Event System for inter-peripheral signalling, up to five 16-bit Timer/Counters, two I2C, up to six SERCOM (configurable as UART/SPI/I2C), one full-speed USB, one CAN 2.0B, a 12-bit 350 ksps ADC, a 10-bit DAC, and two analog comparators. The Serial Wire Debug (SWD) interface and a non-maskable interrupt (NMI) are standard. Architecturally, the device uses a single-cycle I/O bus, a low-leakage RAM retention scheme, SleepWalking peripherals, and six sleep modes (IDLE, STANDBY, BACKUP, OFF, Hibernate Sleep and Hibernate Standby). The integrated USB transceiver removes the need for external PHY components, which simplifies USB device designs and reduces BOM cost. Typical applications include: home automation nodes (Zigbee/BLE bridges, smart thermostats), consumer electronics (wearables, remote controls, gaming accessories), metering (electricity/water/gas meters), industrial sensor hubs, and USB peripherals (HID, CDC, custom HID-class devices). For USB applications in particular, the integrated transceiver and on-chip pull-ups simplify USB device certification. Design considerations: ensure the VDDCORE pin is decoupled with a 1 µF + 100 nF pair, route D+/D- as a 90-ohm differential pair on the PCB, and configure the XOSC32K crystal load capacitors per the crystal manufacturer's CL specification. Drop-in migration paths exist within the SAM D21 family: the ATSAMD21G18A-MU and ATSAMD21G18A-MF share identical 48-pin QFN pinout with different memory maps. This page consolidates distributor pricing, drop-in cross-reference alternatives, application companion parts, and PCB layout guidance not always found on the manufacturer datasheet, structured for fast engineer evaluation.

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ATSAMD21G18A-UUT - 48MHz Cortex-M0+ MCU, 256KB Flash, 45-WLCSP
ATSAMD21G18A-UUT

ATSAMD21G18A-UUT - 48MHz Cortex-M0+ MCU, 256KB Flash, 45-WLCSP

The Microchip Technology ATSAMD21G18A-UUT is a 32-bit ARM Cortex-M0+ flash microcontroller (SAM D21G family) running up to 48 MHz with 256 KB of Flash, 32 KB of SRAM, and 6 SERCOM (configurable serial communication) interfaces, packaged in a 45-ball WLCSP (Wafer-Level Chip-Scale Package) for ultra-compact designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and configurable peripherals. The Cortex-M0+ is ARM's smallest, most energy-efficient application processor core, designed for deterministic embedded workloads in power-constrained products. Within the broader taxonomy, the ATSAMD21G18A-UUT is a low-power MCU -> 32-bit MCU -> ARM Cortex-M0+ MCU -> SAM D21 family -> SAM D21G sub-family -> integrated circuit. This hierarchy helps engineers understand which firmware, toolchains, and reference designs are compatible. Key features include a hardware 12-bit ADC (Analog-to-Digital Converter) and 10-bit DAC (Digital-to-Analog Converter), a full-speed USB 2.0 device/host interface, a 16-bit Event System for inter-peripheral signalling, and SERCOM modules that can be independently configured as UART, SPI, or I2C. The SAM D21 also provides a 32-bit RTC (Real-Time Counter), a 24-bit SysTick timer, and up to 38 GPIO (General-Purpose Input/Output) pins. The device reaches 2.46 CoreMark/MHz, indicating efficient integer code execution. The architecture combines an ultra-low-power SleepWalking peripheral event system with multiple Sleep modes (IDLE, STANDBY, BACKUP). This makes the part suitable for battery-powered devices that spend most of their life in deep sleep and only wake on peripheral events such as button presses, sensor thresholds, or RTC alarms, then process data and return to sleep. Typical applications include low-power IoT sensor nodes, USB HID (Human Interface Device) peripherals such as keyboards/mice, home-automation control panels, smart metering, consumer wearables, and industrial sensor aggregation. Designers choose this part when they need deterministic real-time response, code space for application firmware, USB connectivity, and extreme small PCB footprint. When laying out the 45-WLCSP package, use microvia (small laser-drilled) PCB stack-up and place the ground/VDD balls directly above solid internal copper planes. The BOD12/BOD33 (Brown-Out Detector) thresholds should be enabled in software to guarantee safe boot and Flash integrity at low battery voltages. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet, giving engineers a single authoritative reference for sourcing and design-in decisions.

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ATSAMD21J15B-AUT - 32KB Flash 48MHz Cortex-M0+ MCU | Microchip
ATSAMD21J15B-AUT

ATSAMD21J15B-AUT - 32KB Flash 48MHz Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAMD21J15B-AUT is a 32-bit ARM Cortex-M0+ based microcontroller from the SAM D21 family, offering 32 KB of Flash, 4 KB of SRAM, and a 48 MHz core in a 64-pin TQFP package rated for 85 C operation. It integrates a 12-channel SERCOM configurable peripheral set, a 12-bit ADC, a 10-bit DAC, USB 2.0 Full-Speed device, and a powerful Event System, making it a general-purpose low-power MCU for connected and battery-powered embedded designs. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program and data memory, peripherals, and I/O. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for deterministic interrupt response and low active/quiescent power. Within Microchip's portfolio, the SAM D21 sits between the 8-bit AVR and the higher-end SAM D5x/E5x families, targeting IoT endpoints, human-machine interfaces (HMI), and sensor hubs. Key features include 32 KB Flash and 4 KB SRAM on-chip, six SERCOM channels each configurable as UART/SPI/I2C, a 12-channel 12-bit 350 ksps ADC, a 10-bit 350 ksps DAC, Full-Speed USB 2.0 device with on-chip transceiver, and up to 52 GPIO with peripheral touch controller support. The device operates from 1.62 V to 3.63 V, drawing roughly 3 mA active at 48 MHz and down to a few microamps in STANDBY with RTC retention. Architecturally, the SAMD21 uses a single-cycle IO bus and an AHB-Lite/APB bridge matrix, allowing direct peripheral-to-peripheral DMA via the Event System without CPU intervention. The integrated 48 MHz digital frequency-locked loop (DFLL) can be sourced from the internal 32 kHz oscillator or an external crystal, simplifying USB clocking on designs that lack an accurate high-frequency source. Hardware cryptographic accelerators are not present on this part (those are reserved for the SAML21/CryptoCell line). Typical applications include low-power IoT sensor nodes, USB HID peripherals (keyboards, mice, custom devices), battery-powered consumer products, building automation HMI, and small industrial control boards. The AUT suffix denotes automotive grade (-40 C to +85 C operating range per the datasheet header) supplied in tape-and-reel. When designing with this device, pay close attention to USB D+/D- trace impedance and the VBUS pin's 5 V tolerance. A 1 uF + 100 nF decoupling network is recommended near each supply pin, and unused SERCOM pads should be left floating or tri-stated to avoid leakage in deep-sleep modes. Firmware should configure the DFLL before invoking USB peripherals to avoid out-of-spec USB traffic. This page synthesizes distributor pricing, drop-in alternatives across Microchip's SAM D21 family, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAMD21J15B-MFT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
ATSAMD21J15B-MFT

ATSAMD21J15B-MFT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip

The Microchip Technology ATSAMD21J15B-MFT is a 32-bit ARM Cortex-M0+ microcontroller in the SAM D21 family, operating at up to 48 MHz and delivering 2.46 CoreMark/MHz, housed in a 64-pin QFN (9x9 mm) package. It integrates 32 KB of Flash and 4 KB of SRAM, providing a balanced compute and memory profile for space-constrained embedded designs. Functional Safety (FuSa) support and an extended 125°C operating range qualify the device for both consumer-grade and ruggedized industrial use. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The ARM Cortex-M0+ is the smallest and most energy-efficient ARMv6-M core, optimized for deterministic interrupt response and ultra-low active power. Within the broader taxonomy, the ATSAMD21J15B sits at: ARM Cortex-M0+ -> 32-bit MCU -> Microcontroller -> Integrated Circuit -> Semiconductor. This position gives designers a familiar Thumb-2 instruction set, broad toolchain support (GCC, IAR, Keil, MPLAB X), and a mature software ecosystem including Microchip's ASF (Advanced Software Framework) and Harmony 3. Key features of the ATSAMD21J15B-MFT include up to 6 SERCOM (serial communication) interfaces configurable as USART, I2C, or SPI, a 12-bit ADC with up to 20 channels, a 10-bit DAC, multiple 16-bit timer/counters, and a full-speed USB 2.0 Device with on-chip transceiver. The device also integrates a 32 kHz RTC, a 48 MHz high-accuracy internal RC oscillator (DFLL calibrated to within 2% over voltage and temperature), and an Event System for peripheral-to-peripheral signaling without CPU intervention. The SAM D21 architecture uses a single AHB-APB bus matrix with a dedicated bridge for DMA-driven peripheral access, enabling low-latency deterministic response. Power management supports RUN, IDLE, STANDBY, BACKUP, and OFF sleep modes with sub-microamp standby current. The 64-pin QFN package exposes up to 52 GPIO, supporting both 3.3V single-supply operation and I/O bank flexibility. Typical applications include IoT sensor nodes, USB HID peripherals, low-power wireless gateways, industrial control front-ends, and consumer wearables. The full-speed USB device interface is particularly attractive for HID, CDC, and vendor-class designs. Design with this device by allocating the 4 KB SRAM carefully; stack and heap consume roughly 1.5 KB on a typical Harmony 3 project, leaving about 2.5 KB for application buffers. Use the internal DFLL48M oscillator as the default clock source to minimize BOM cost, and reserve an external 32.768 kHz crystal for RTC-grade timing accuracy. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the SAM D21 family, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21J15B-MU - 32KB Flash Cortex-M0+ MCU | Microchip
ATSAMD21J15B-MU

ATSAMD21J15B-MU - 32KB Flash Cortex-M0+ MCU | Microchip

The Microchip Technology (formerly Atmel) ATSAMD21J15B-MU is a low-power 32-bit ARM Cortex-M0+ microcontroller in the SAM D21J family, integrating 32KB of Flash, 4KB of SRAM, and running at up to 48 MHz with 2.46 CoreMark/MHz performance. It is housed in a 64-pin QFN (9x9 mm) industrial-grade package and targets general-purpose embedded designs that demand deterministic real-time behavior and a rich analog/digital peripheral set. A microcontroller (MCU) is a single-chip computer that combines a processor core, program memory (Flash), data memory (SRAM), and configurable peripherals on one die. Cortex-M0+ cores are the smallest, most energy-efficient members of the ARMv6-M family, positioned below Cortex-M4 in the ARM Cortex taxonomy (Cortex-M -> Cortex-M0/M0+ -> general-purpose MCU). MCUs hierarchically belong to: MCU -> microcontroller -> embedded processor -> semiconductor. The SAMD21J further extends this with Microchip's sleepwalking peripherals and SERCOM (Serial Communication Interface) modules that can run independently of the core. Key features include up to six SERCOM interfaces for I2C/SPI/UART, a 12-bit 350 ksps ADC with up to 14 channels, a 10-bit 350 ksps DAC, three 24-bit timers/counters, two I2S interfaces, and a full-speed USB 2.0 device/host with on-chip transceiver. The device integrates a 48 MHz Digital Frequency Locked Loop (DFLL48M) and a 32.768 kHz low-power oscillator that can serve as reference for fractional PLLs (FDPLL) generating 48 MHz to 96 MHz. Power-on reset, brown-out detection, and an External Interrupt Controller with 16 channels and one non-maskable interrupt round out the housekeeping features. Architecturally, the ATSAMD21J15B implements the Cortex-M0+ core with single-cycle multiplier, NVIC, and Microchip's standard SAM peripheral set including Event System for hardware-triggered peripheral-to-peripheral signaling without CPU intervention. The 32KB Flash variant is the smallest in the J-pin (64-pin) family, with code-compatible migration paths to J16/J17/J18 (64KB/128KB/256KB Flash). The 'B' silicon revision and 'F' revision designation denote incremental fixes that the SAM D21 family datasheet (DS40001882) documents. Typical applications include IoT sensor nodes, USB HID/CDC devices, low-power wireless sensor hubs, industrial HMI panels, home automation controllers, and battery-powered wearables. The combination of Cortex-M0+ efficiency, USB, and rich analog makes the part especially attractive for any 64-pin industrial design that needs both USB device and precision ADC sampling in a single chip. When designing with this part, choose the QFN package (-MU suffix) when PCB real-estate is critical and thermal performance via the exposed pad is acceptable; choose the TQFP (-AU) for hand-prototyping or where thermal vias or heat-sinking are impractical. Always enable the brown-out detector (BOD) at the lowest threshold the application tolerates and use the 32.768 kHz crystal with the FDPLL for jitter-sensitive USB or I2S streams. This page synthesizes distributor pricing, parametric data, drop-in same-footprint alternatives, and design notes from the Microchip SAM D21/DA1 Family datasheet that are not assembled in one place in the manufacturer datasheet.

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ATSAMD21J15B-MUT - 48MHz Cortex-M0+ 32KB Flash MCU
ATSAMD21J15B-MUT

ATSAMD21J15B-MUT - 48MHz Cortex-M0+ 32KB Flash MCU

The Microchip Technology ATSAMD21J15B-MUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, operating at up to 48 MHz with 32 KB of Flash and 4 KB of SRAM, housed in a 64-pin QFN (9x9 mm) package. According to the Microchip product page, the device features the Functional Safety (FuSa) capability and integrates advanced peripherals including a 12-bit ADC, DAC, USB, and SERCOM interfaces for flexible serial communication. An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core optimized for energy-efficient embedded applications, commonly used in IoT endpoints, sensor hubs, and battery-powered consumer devices. The Cortex-M0+ sits at the entry level of the ARM M-class hierarchy (M0/M0+ -> M3 -> M4 -> M7), prioritizing low power and deterministic interrupt response over raw compute. The SAMD21 family further extends this with Microchip's proprietary Smart Peripherals, low-power SleepWalking, and Event System that allow peripherals to operate autonomously while the CPU remains asleep. The ATSAMD21J15B-MUT delivers 2.46 CoreMark/MHz performance, six SERCOM channels (configurable as UART/SPI/I2C), one full-speed USB 2.0 interface with on-chip transceiver, a 14-channel 12-bit ADC, a 10-bit DAC, and multiple timer/counter blocks. The device operates from 1.62 V to 3.63 V and supports both internal and external clock sources including a 48 MHz Digital Frequency Locked Loop (DFLL48M) and a 48 MHz to 96 MHz Fractional Digital Phase-Locked Loop (FDPLL96M). The CPU architecture pairs the Cortex-M0+ core with a Single Precision IO Relaxed IEEE 754 Floating Point Unit (FPU) and a Memory Protection Unit (MPU) for safety-critical code isolation. Functional Safety features include hardware CRC, memory integrity checks, and a windowed watchdog timer, making the SAM D21J suitable for industrial and white-goods applications demanding IEC 60730 Class B compliance. Typical applications include IoT sensor nodes, USB HID peripherals, home automation controllers, industrial sensor interfaces, and low-power wearable devices where the Event System and SleepWalking peripherals extend battery life by allowing autonomous sensor sampling without waking the CPU. The 64-pin QFN footprint with 0.5 mm pitch suits space-constrained PCB layouts. Key design considerations include provision of a clean 3.3 V supply with adequate decoupling (typically 100 nF plus 4.7 µF bulk), a 32.768 kHz crystal for RTC accuracy, and proper SWD pin routing for in-circuit programming. Designers should also configure brown-out detection (BOD) thresholds appropriate for the target supply rail. This page consolidates distributor pricing, verified drop-in alternatives within the SAM D21 family, and practical design guidance not found in the standalone datasheet, supporting engineers evaluating the ATSAMD21J15B-MUT for new designs and supply-chain resilience planning.

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ATSAMD21J16B-AF - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAMD21J16B-AF

ATSAMD21J16B-AF - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip ATSAMD21J16B-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, featuring 64KB of in-system self-programmable Flash and 8KB SRAM, housed in a 64-pin TQFP (10x10 mm) package. Operating at up to 48 MHz and reaching 2.46 CoreMark/MHz, it delivers efficient compute performance while maintaining low power consumption. The device is qualified for the industrial temperature range up to +125C and operates from a 1.62V to 3.63V supply (3.3V typical), targeting AEC-Q100 functional safety-class designs. A microcontroller (MCU) is an integrated circuit that combines a CPU core, memory, and programmable peripherals into a single chip. Within the embedded systems hierarchy, an MCU sits between a microprocessor (which requires external memory) and a system-on-chip (which integrates higher-level application processors). The Cortex-M0+ core places this MCU in the entry-level 32-bit tier, optimized for deterministic interrupt response, low active current, and aggressive sleep modes for battery-powered designs. Key features of the ATSAMD21J16B-AF include a single-cycle hardware multiplier, a Micro Trace Buffer for lightweight instruction trace, six Serial Communication Interfaces (SERCOM) configurable as UART/SPI/I2C, a 12-channel DMA controller and 12-channel Event System for peripheral-to-peripheral signaling, plus full-speed USB 2.0 device/host support. Advanced peripherals include a 12-bit 350 ksps ADC with up to 20 channels, a 10-bit 350 ksps DAC, two analog comparators, and a 24-bit Timer/Counter for Control (TCC). The device also supports capacitive touch via the Peripheral Touch Controller (PTC). The SAM D21 architecture integrates a 48 MHz Digital Frequency Locked Loop (DFLL48M) and a 48 MHz to 96 MHz Fractional Digital Phase-Locked Loop (FDPLL96M) on-chip, eliminating the need for an external crystal in many designs. A two-pin Serial Wire Debug (SWD) interface handles programming and test, and the part is drop-in compatible with the SAM D20 family for easy migration. Typical applications include IoT sensor nodes, consumer wearables, industrial HMI panels, USB human-interface devices, capacitive-touch user interfaces, and low-power wireless sensor hubs. Its combination of 64KB Flash and SERCOM flexibility makes it well-suited to protocols like BLE co-processor interfaces, LoRa command shells, and CAN bus nodes through external transceivers. When designing with this device, provide a 1uF and 0.1uF decoupling pair close to VDDCORE and VDDIO, follow the recommended 32.768 kHz crystal layout for RTC accuracy, and ensure the SWD reset circuit allows both programming and application reset. AEC-Q100 qualification (where applicable via the -AF variant) makes the part attractive for automotive body and chassis ECUs. This page synthesizes distributor pricing, drop-in alternatives drawn from the same SAM D21 family, and practical design notes that complement the manufacturer datasheet.

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ATSAMD21J16B-AFT - 64KB Flash ARM Cortex-M0+ MCU | Microchip
ATSAMD21J16B-AFT

ATSAMD21J16B-AFT - 64KB Flash ARM Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAMD21J16B-AFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family delivering 48 MHz CPU performance with 64 KB in-system programmable Flash and 8 KB SRAM in a 64-pin TQFP (10x10 mm) package. It integrates a single-cycle hardware multiplier, Micro Trace Buffer, 12-channel DMAC, 12-channel Event System, and Functional Safety (FuSa) features targeting industrial and consumer applications. The device operates from 1.62 V to 3.63 V with dedicated 3.3 V typical rails and supports the full -40C to +125C industrial temperature range. 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, ADCs, communication interfaces, and GPIO. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for deterministic real-time embedded workloads at low cost. Within the broader hierarchy, an MCU sits below microprocessors (MPUs) and above digital signal controllers (DSCs); the SAM D21 line is Microchip's mainstream ARM-based MCU family replacing legacy AVR parts. Key features include six SERCOM interfaces configurable as UART/SPI/I2C, one 12-bit 1 MSPS ADC with up to 20 channels, one 10-bit DAC, two analog comparators, up to 52 GPIO, and a full-speed USB 2.0 Device/Host with internal 3.3 V regulator. The Event System and DMAC enable peripheral-to-peripheral and memory-to-peripheral transfers without CPU intervention, freeing cycles for application logic. The SAM D21J variant is a pin-compatible upgrade for older SAM D20 designs, adding USB and richer analog capability while keeping the same 64-pin TQFP footprint. Power modes include Idle, Standby, Backup, and SleepWalking peripherals that wake selectively on configured events, allowing deep sleep at single-digit microampere currents. Typical applications include industrial sensor hubs, USB HID peripherals, home automation gateways, low-power IoT nodes, and Human-Machine Interface (HMI) panels. Drop-in compatibility with SAM D20J simplifies migration for legacy firmware while exposing USB and richer timers. Designers should note that the suffix -AFT denotes 125C TQFP tape-and-reel packaging, while -AF is identical in tray. Ensure the 1.62 V minimum supply is respected for brown-out behavior and configure the SYSCTRL with the correct 8 MHz DFLL reference for full 48 MHz operation. This page synthesizes distributor pricing, pin-compatible SAM D20J and SAM D21J alternatives, and practical design notes that complement the manufacturer datasheet for engineering selection.

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ATSAMD21J16B-AU - SAM D21 48MHz Cortex-M0+ MCU | Microchip
ATSAMD21J16B-AU

ATSAMD21J16B-AU - SAM D21 48MHz Cortex-M0+ MCU | Microchip

The Microchip ATSAMD21J16B-AU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21J family, featuring 64KB Flash, 8KB SRAM, and a 48MHz maximum CPU clock in a 64-pin TQFP (10x10 mm) package. It is part of Microchip's functional-safety-capable SMART MCU family targeting industrial, IoT, and consumer applications. The device integrates rich peripherals including SERCOM, 12-channel DMAC, 12-channel Event System, and a 16-bit Timer/Counter, all while consuming only a few milliamps at full speed. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and programmable peripherals. Within the semiconductor hierarchy, MCUs sit under microcontrollers -> embedded processors -> digital ICs. The Cortex-M0+ is ARM's smallest and most energy-efficient application processor core, optimized for low-power deterministic real-time control. The SAM D21 series extends this with Microchip's Event System for inter-peripheral signaling without CPU intervention, dramatically reducing wake-up latency and power. Key features of the ATSAMD21J16B-AU include 64KB Flash (16K x 8), 8KB SRAM, full-speed USB 2.0 with on-the-go (OTG) support, an 8-channel 12-bit ADC with up to 350 ksamples/s, two Analog Comparators, a 10-bit DAC, and up to six SERCOM configurable serial interfaces (UART/SPI/I2C). The device operates from 1.62V to 3.63V, draws typical 70 uA/MHz active current, and supports Idle and Standby sleep modes with SleepWalking peripherals. It is pin- and code-compatible with the SAM D20 family, simplifying migration. The ATSAMD21J16B-AU is fabricated using a low-power CMOS process and integrates an internal 48MHz Digital Frequency Locked Loop (DFLL48M) and a Fractional PLL up to 96MHz, providing flexible clocking. Its 64-pin TQFP footprint accommodates 52 programmable I/O pins, and its ARM Cortex-M0+ core delivers 2.46 CoreMark/MHz, the highest energy efficiency in ARM's M-class lineup. Typical applications include IoT sensor nodes, USB HID peripherals, smart-home controllers, industrial sensor hubs, low-power wearables, and capacitive touch human-machine interfaces. The wide operating voltage and temperature range (up to 85C for the -AU grade) also suit industrial sensor conditioning boards. The robust Event System and DMAC enable complex signal-processing chains without CPU overhead, making the part ideal for battery-powered edge devices. When designing with the ATSAMD21J16B-AU, ensure the 1.62-3.63V supply is decoupled with 100nF and 4.7uF capacitors placed close to VDDCORE and VDDIO pins. The 32.768kHz crystal is recommended for RTC accuracy in standby; load capacitors must match the crystal specification. For USB applications, the D+/D- traces must be routed as a 90-ohm differential pair. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an actionable summary for sourcing, replacement, and PCB layout decisions in a single view.

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ATSAMD21J16B-AUT - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAMD21J16B-AUT

ATSAMD21J16B-AUT - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip (formerly Atmel) ATSAMD21J16B-AUT is a 32-bit ARM Cortex-M0+ microcontroller in the SAM D21J family, integrating 64KB of Flash, 8KB of SRAM, and a rich peripheral set into a 64-pin TQFP (10x10 mm) package. It operates at up to 48MHz from a 1.62V to 3.63V supply and is rated for the automotive-grade -40C to +85C temperature range, making it suitable for in-cabin and body electronics that demand industrial reliability. The device ships in Tape & Reel packaging and is targeted at low-power, mixed-signal embedded designs that need deterministic Cortex-M0+ performance with low active current. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a wide range of peripheral interfaces (timers, ADC, communication ports, GPIO). Cortex-M0+ is ARM's smallest and most energy-efficient Cortex-M core, designed for deterministic interrupt response and ultra-low active power. The SAM D21 family extends this baseline with Microchip's Event System, SleepWalking peripherals, and SERCOM serial engines, positioning the line above simple 8-bit MCUs (e.g., PIC16) but below Cortex-M4 parts in capability and cost. Key features of the ATSAMD21J16B-AUT include the Cortex-M0+ core with single-cycle GPIO access, a 12-channel DMAC for offloading CPU data movement, six SERCOM modules that can each be configured as UART/SPI/I2C, a 14-channel 12-bit 1MSPS ADC, two analog comparators, a 10-bit DAC, and a full-speed USB 2.0 device/host port. Functional Safety (FuSa) features include a hardware CRC engine and Memory Protection Unit (MPU). These features collectively let a single SAMD21 replace a discrete MCU plus external ADC plus USB-to-UART bridge on many boards. Architecturally, the SAMD21J uses a Harvard bus with separate AHB/APB bridges for the Cortex-M0+ core and its DMAC, allowing peripheral data transfers to occur without CPU intervention. The SleepWalking Event System wakes the appropriate peripheral only when a relevant signal edge occurs, holding the core in IDLE or STANDBY (<= 3 microA in STANDBY with RTC running) until genuine work is required. This peripheral-driven architecture is what makes the part attractive for battery-powered IoT, wearable, and remote-sensor products. Typical applications include automotive body controllers and HVAC user interfaces, USB-CDC/HID human-interface devices, low-power wireless sensor nodes, industrial control panels, and small appliances that need capacitive touch via the PTC peripheral. The wide operating voltage range (1.62V-3.63V) also supports direct connection to single-cell Li-ion batteries without an additional LDO. Compared with the SAM D20 family, the SAM D21 adds USB, an I2S interface, and the Event System enhancements, while remaining pin-compatible with the SAM D20 in the same 64-pin TQFP footprint. When designing with this part, pay close attention to decoupling (one 100nF per VDD pin plus a bulk 4.7uF), the SERCOM pin multiplexing (the same physical pin can be UART RX in one configuration and SPI MOSI in another), and the bootloader entry pattern (a low on PA15 during reset triggers the pre-flashed USB/CAN bootloader). The 64-pin TQFP exposes 52 GPIO-capable pins after subtracting power, ground, and crystal pads. This page synthesizes distributor pricing, automotive-grade drop-in alternatives, and practical design notes - particularly the SAM D20 to SAM D21 migration path - that go beyond the manufacturer datasheet summary.

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ATSAMD21J16B-MF - ARM Cortex-M0+ 48MHz 64KB Flash MCU | Microchip
ATSAMD21J16B-MF

ATSAMD21J16B-MF - ARM Cortex-M0+ 48MHz 64KB Flash MCU | Microchip

The Microchip ATSAMD21J16B-MF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21J family, featuring 64KB of Flash, 8KB of SRAM, and a maximum CPU frequency of 48 MHz, housed in a 64-pin QFN (9x9 mm) package. It integrates a Functional Safety (FuSa) capable core with rich peripherals including USB, SERCOM, ADC, DAC, and timers, all powered from a single 1.62V to 3.63V supply. 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 ARM's smallest and most energy-efficient 32-bit core, designed for ultra-low-power embedded applications while retaining the broader ARMv6-M Thumb instruction set and a deterministic interrupt model. The SAM D21 family sits within Microchip's broader hierarchy of ARM-based MCU -> 32-bit microcontroller -> embedded controller, and is widely used as a modern replacement for 8-bit AVR and legacy ARM7 designs. Key features include 64KB Flash with ECC, 8KB SRAM, six SERCOM interfaces that can each operate as USART, SPI, or I2C, a 12-bit 350 ksps ADC with up to 20 channels, a 10-bit 350 ksps DAC, full-speed USB 2.0 with on-chip transceiver, and a 2.46 CoreMark/MHz performance figure. The device also integrates a 32 kHz RTC, multiple sleep modes down to sub-microamp current, and a 6-channel event system for inter-peripheral signaling. Architecturally, the SAMD21J16B uses a single-cycle hardware multiplier, an MPU for memory protection, and Microchip's standard Atmel/Microchip peripheral set mapped through SERCOM multiplexing, allowing flexible pin function allocation. The 64-QFN (9x9 mm) package exposes 52 GPIO and supports operation across the industrial -40C to +125C temperature range. Typical applications include USB human-interface devices, IoT sensor nodes, low-power wireless sensor hubs, wearable health monitors, industrial control panels, and consumer appliances. Its balance of low power, USB, and analog integration suits both battery-powered and mains-powered embedded systems. When designing with this part, observe the recommended 0.1uF + 1uF + 10uF decoupling network near VDD and VDDIO, and follow the QFN thermal pad soldering guidelines for reliable ground continuity. Programming is supported through MPLAB X IDE, Atmel Studio 7, and the SAMD21 core within the Arduino IDE. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet. Information was cross-verified across DigiKey, Mouser, and Microchip product pages.

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