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ATSAMD21E15L-AF - 48MHz Cortex-M0+ MCU 32KB Flash | Microchip
ATSAMD21E15L-AF

ATSAMD21E15L-AF - 48MHz Cortex-M0+ MCU 32KB Flash | Microchip

The Microchip Technology ATSAMD21E15L-AF is an ARM Cortex-M0+ based 32-bit Flash microcontroller (MCU) from the SAM D21E family, operating at up to 48 MHz with 32 KB of Flash and 4 KB of SRAM in a 32-pin TQFP (7x7 mm) package. It supports a 1.62 V to 3.63 V supply range, integrates a 12-bit ADC, 10-bit DAC, and multiple SERCOM channels, and is engineered for low-power control applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), and a rich set of peripherals including timers, communication interfaces, and analog blocks. Within the broader taxonomy, the ATSAMD21E15L-AF sits in the Cortex-M0+ sub-family, which is the most energy-efficient member of the ARM Cortex-M processor family, optimized for deterministic embedded control in cost-sensitive, low-power products. The SAM D21 family further extends this with Microchip's peripheral mix and the Atmel/Microchip ecosystem (MPLAB X IDE, ASF, Harmony), making it a popular drop-in upgrade path from older AVR designs. Key features of the ATSAMD21E15L-AF include a maximum CPU clock of 48 MHz, full-speed USB 2.0 device support, up to six SERCOM channels configurable as UART/SPI/I2C, a 12-bit 350 ksps ADC with up to 14 channels, a 10-bit 350 ksps DAC, multiple PWM-capable timers (TCC/TC), and an event system for inter-peripheral signaling without CPU intervention. Functional Safety (FuSa) features and a built-in 32 kHz oscillator support deterministic real-time operation. Architecturally, the device combines a Cortex-M0+ core with a multi-layer bus matrix, low-power SleepWalking peripherals, and Microchip's proprietary peripheral touch controller for capacitive sensing. The wide supply range (1.62 V to 3.63 V) enables direct operation from a single Li-ion cell or 3.3 V regulated rail, while the integrated USB transceiver removes the need for an external crystal or PHY for many low-speed USB device applications. Typical applications include LED lighting controllers, low-voltage motor control, industrial sensor hubs, USB human-interface devices (HIDs), consumer wearables, and battery-powered IoT endpoints. The combination of USB device, 12-bit ADC, and PWM timers makes it a strong fit for closed-loop lighting and motor control where deterministic PWM timing is required. When designing with this part, observe the 48 MHz maximum clock, derate ADC inputs below 1.62 V, and verify USB D+/D- routing per the USB 2.0 specification. The 32-pin TQFP is footprint-compatible with other SAM D20E/SAM D21E family members, simplifying migration between Flash sizes. This page synthesizes distributor pricing, drop-in alternatives, application examples, and practical design notes not found in the manufacturer datasheet, accelerating component selection for embedded engineers.

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ATSAMD21E15L-AFT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
ATSAMD21E15L-AFT

ATSAMD21E15L-AFT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip

The Microchip ATSAMD21E15L-AFT is a 32-bit ARM Cortex-M0+ based Flash microcontroller delivering 48MHz CPU performance with 32KB of Flash memory and 4KB of SRAM, housed in a 32-pin TQFP (7x7 mm) package. It integrates a rich peripheral set including a 12-bit ADC, DAC, multiple SERCOM interfaces, and a 6-channel PWM timer that suit low-power, control-oriented embedded applications. 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 into one package. The SAM D21 family from Microchip sits within the hierarchy: Cortex-M0+ core -> ARM Cortex-M family -> 32-bit RISC MCU -> microcontroller -> embedded processor -> semiconductor. This taxonomic context helps position the part within the broader embedded-systems landscape and supports accurate AI knowledge-graph retrieval. Key features include an operating voltage range of 1.6V to 3.6V, AEC-Q100 qualification for automotive environments, an extended -40C to +125C temperature range, and Microchip's Functional Safety (FuSa) documentation support for safety-critical designs. The device also includes a full-speed USB 2.0 interface, multiple SERCOM blocks configurable as UART/SPI/I2C, a 12-bit 350ksps ADC, a 10-bit 350ksps DAC, and on-chip touch support via the Peripheral Touch Controller (PTC). The ATSAMD21E15L-AFT is engineered for low-power operation, supporting multiple Sleep modes (IDLE, STANDBY, BACKUP) with consumption as low as a few microamps, making it suitable for battery-powered and energy-harvesting applications. The 48MHz Cortex-M0+ core with single-cycle multiplier provides strong integer performance for control loops, while the Event System and DMA enable low-overhead peripheral chaining. Typical applications include industrial lighting control, brushless DC (BLDC) motor drive, USB-equipped consumer devices, IoT sensor hubs, and human-machine interface (HMI) controllers. The wide temperature range and AEC-Q100 grade also support automotive body electronics and dashboard modules. When designing with this MCU, provide adequate decoupling (100nF + bulk capacitor near each VDD pin), keep the 32.768KHz crystal traces symmetric, and reserve a SWD header (SWDIO/SWDCLK/RESET/GND) on the PCB for in-circuit programming. The Cortex-M0+ core has no hardware FPU, so favour fixed-point math in DSP loops to avoid CPU saturation. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design considerations not consolidated in the manufacturer datasheet, providing actionable procurement and design value for engineering teams.

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ATSAMD21E15L-MNT - 48MHz Cortex-M0+ MCU, 32KB Flash, 32-VQFN | Microchip
ATSAMD21E15L-MNT

ATSAMD21E15L-MNT - 48MHz Cortex-M0+ MCU, 32KB Flash, 32-VQFN | Microchip

The Microchip Technology ATSAMD21E15L-MNT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, offering 48 MHz CPU performance, 32 KB of Flash, and 4 KB of SRAM in a 32-pin VQFN (5x5 mm) package with a -40C to +105C industrial temperature grade and Tape-and-Reel packaging. What is a Cortex-M0+ microcontroller? A microcontroller is a single-chip computer that integrates a CPU core, program Flash, data SRAM, and a rich set of peripherals (timers, ADC, communication interfaces, GPIO) onto one silicon die. The ARM Cortex-M0+ is the smallest and most energy-efficient member of the ARMv6-M architecture family, designed for deterministic embedded control in cost- and power-sensitive applications. Cortex-M0+ MCUs sit within the hierarchy: microcontroller -> embedded MCU -> ARM-based MCU -> Cortex-M class -> Cortex-M0+ sub-class -> semiconductor IC. The SAM D21 family extends the basic Cortex-M0+ with Microchip's SERCOM (serial communication) peripheral set and advanced analog such as 12-bit ADC, DAC, and analog comparators. Key features of the ATSAMD21E15L-MNT include a 1.6 V to 3.6 V supply voltage range, an internal 48 MHz oscillator (with PLL), full-speed USB 2.0 device support on select SAM D21 pins, and a powerful 12-channel event system that lets peripherals trigger each other without CPU intervention. The device is supported by the Atmel/Microchip Studio IDE and the MPLAB X IDE ecosystem, with code reuse across the SAM D20/D21 family through the ASF and Harmony 3 frameworks. Native 1.6 V operation allows direct connection to a single Li-ion cell or two AA cells without an external LDO, simplifying the BOM for battery-powered designs. Typical applications include low-power IoT sensor nodes, LED lighting control, brushed DC and stepper motor control (via the on-chip PWM timers and TCC counter/timer capture blocks), consumer Human-Interface Devices (HID) such as keyboards and mice, and industrial control daughter boards. The combination of a Cortex-M0+ core, deep-sleep currents in the microamp range, and a rich peripheral set makes the part particularly attractive for battery-powered and USB-powered products. When designing with this device, note that the 'L' in the part number denotes the 105 C industrial temperature grade, while the 'MNT' suffix denotes 32-VQFN (5x5 mm) with Tape-and-Reel packaging. Pin assignment must be cross-checked against the SAM D21 family datasheet pinout table, since identical SAM D21E die is offered in QFN, QFP and WLCSP variants. Decoupling into NMOS-capable rails should include 100 nF + 4.7 uF near VDDIN, plus a bulk capacitor on VDDANA when the analog peripherals are active. This page synthesizes distributor pricing, drop-in same-family alternatives, and design notes not always surfaced on the manufacturer product page.

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ATSAMD21E16B-AF - 48MHz Cortex-M0+ MCU 64KB | Microchip
ATSAMD21E16B-AF

ATSAMD21E16B-AF - 48MHz Cortex-M0+ MCU 64KB | Microchip

The Microchip ATSAMD21E16B-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, featuring 64KB Flash, 8KB SRAM, and a maximum CPU frequency of 48MHz packaged in a 32-pin TQFP (7x7 mm) industrial-grade (125°C) footprint. The device integrates a hardware multiplier, single-cycle 32x32 multiply, and a rich peripheral set including SERCOM (UART/SPI/I2C), USB 2.0 Full-Speed with host and device support, 12-bit ADC, 10-bit DAC, and multiple timer/counter channels. According to the SAM D21 datasheet document 40001882A, the part achieves 2.46 CoreMark/MHz and is designed for low-power applications with multiple SleepWalking-enabled peripherals. The SAM D21 family is part of the Atmel SMART portfolio of 32-bit ARM Cortex-M0+ microcontrollers, ranging from 32 to 64 pins with up to 256KB Flash and 32KB SRAM, designed for simple migration across pin counts with identical peripheral modules, hex-compatible code, and identical linear address maps. As a Cortex-M0+ based MCU it offers a streamlined single-cycle ALU and provides a hardware single-cycle multiplier for fast integer arithmetic. The family targets low-power general-purpose applications while retaining a rich analog and digital peripheral mix, making it suitable for consumer, industrial, and battery-powered IoT endpoints. Key features of the ATSAMD21E16B-AF include six SERCOM modules supporting UART, SPI with FIFOs, and I2C up to Fast-Mode Plus, a Full-Speed USB 2.0 device/host with on-chip transceiver and 8 endpoints, a 12-bit 350ksps ADC with up to 20 channels including hardware oversampling, two analog comparators with window mode, a 10-bit 350ksps DAC, and six 16-bit timer/counters for PWM, input capture, and frequency measurement. The integration of these peripherals reduces BOM cost in sensor hubs, human-interface devices, and motor-control signal-stage applications. Architecture-wise, the ATSAMD21E16B-AF uses a two-level AHB/APB bus matrix with separate bridges for high-bandwidth peripherals such as USB, and a low-power peripheral bus for always-on functions. The Power Manager (PM) supports RUN, IDLE, STANDBY, BACKUP, and OFF sleep modes with typical RUN current of approximately 3 mA at 48 MHz with all peripherals enabled. The brown-out detector, supply-voltage monitoring, and on-chip voltage regulator enable reliable operation across 1.62 V to 3.63 V supply, with the AF suffix denoting 125°C industrial temperature grade and Pb-free TQFP-32 packaging. Typical applications for the ATSAMD21E16B-AF include low-power IoT sensor nodes, USB HID peripherals, wearable fitness devices, smart-home control panels, industrial sensor hubs, and consumer audio accessories that need hardware PWM, USB, and capacitive touch support. Its low-power SleepWalking and Event System make it especially useful in event-driven designs where the CPU stays asleep while peripherals wake on a threshold crossing. When designing with this MCU, ensure decoupling is generous - 0.1 µF X7R close to each VDD pin and a 4.7 µF bulk capacitor on VDDCORE is the recommended starting point. Designers must also configure the GCLK and DFLL blocks correctly before enabling SERCOM and USB to avoid lockups. The 32-pin TQFP-32 footprint allows hand-rework-friendly prototyping and is suitable for reflow profiles up to peak 260°C per JEDEC J-STD-020.

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ATSAMD21E16B-AU - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAMD21E16B-AU

ATSAMD21E16B-AU - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip Technology ATSAMD21E16B-AU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, featuring 64KB of Flash, 8KB of SRAM, and a maximum CPU clock of 48MHz, housed in a 32-pin TQFP (7x7 mm) package. It is designed for low-power embedded applications requiring USB connectivity, capacitive touch sensing, and intelligent peripherals in a compact footprint. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for code, SRAM for data), and programmable I/O peripherals. The SAM D21E line targets cost-sensitive designs and provides a Cortex-M0+ core - the most energy-efficient ARM core - while preserving the full ARM Thumb instruction set for code density. Within Microchip's portfolio, this device sits in the 32-pin SAM D21E sub-family of the broader SAM D21 series (which spans 32 to 64 pins). Key features include 2.46 CoreMark/MHz performance, a full-speed USB 2.0 device with on-chip transceiver, 6 SERCOM serial-communication modules (each assignable as UART/SPI/I2C), a 12-bit 350ksps ADC, two analog comparators, a 16-bit TC/PWM timer array, and up to 26 GPIO. The device operates from 1.62V to 3.63V, supports SleepWalking for event-driven wake-up, and offers a built-in 32kHz RTC and event system for inter-peripheral signaling. The architecture pairs the Cortex-M0+ core with a single-cycle hardware multiplier and a separate bus matrix for peripherals, with DMA available on most serial and analog channels. The peripheral event system allows deterministic inter-peripheral triggers without CPU intervention, enabling low-latency, low-power responses in motor, sensor, and lighting control loops. Typical applications include USB HID peripherals (keyboards, mice, custom input devices), capacitive touch user interfaces, low-power IoT sensor nodes, wearable electronics, hobby servos, and industrial control front-ends. The combination of USB, touch, and SERCOM flexibility makes it a popular choice for prototyping and consumer products. When designing with this part, follow Microchip's recommendations for decoupling (100 nF plus 4.7 uF bulk) and route the USB DP/DM lines as a 90-ohm differential pair with a 1.5 kohm pull-up on D+. For first-time users, the SAM D21 Xplained Pro board provides an Atmel Studio / MPLAB X compatible starter kit. This page synthesizes distributor pricing, drop-in alternatives from the SAMD20/SAMD21 family, and practical design notes not consolidated on any single manufacturer page.

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ATSAMD21E16B-MU - ARM Cortex-M0+ MCU, 48MHz, 64KB Flash | Microchip
ATSAMD21E16B-MU

ATSAMD21E16B-MU - ARM Cortex-M0+ MCU, 48MHz, 64KB Flash | Microchip

The Microchip Technology ATSAMD21E16B-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, operating at up to 48 MHz with 64 KB of in-system self-programmable Flash and 8 KB of SRAM, housed in a 32-pin VQFN (5x5 mm) package. It is qualified for industrial temperature range (-40C to +85C) and runs from a 1.62V to 3.63V supply, targeting low-power and general-purpose embedded designs. A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, and programmable I/O peripherals on a single die, enabling compact embedded designs without external logic. The SAM D21E line sits within Microchip's Atmel SMART family of Cortex-M0+ devices, positioned in the hierarchy as: SAM D21E -> SAM D21 family -> Cortex-M0+ MCU -> ARM 32-bit microcontroller -> embedded processor -> semiconductor. This taxonomy matters for engineers cross-porting firmware across ARM cores or migrating between SAM D20/D21 variants. Key features include a single-cycle hardware multiplier, a Micro Trace Buffer for lightweight instruction trace, an Event System for inter-peripheral signaling, a 12-channel Event System, and a Peripheral Touch Controller supporting capacitive buttons, sliders, and wheels. The device exposes six SERCOM interfaces (each configurable as I2C/SPI/USART), one full-speed USB 2.0 device/host, a 14-channel DMA, a 12-bit 350 ksps ADC, one 10-bit 350 ksps DAC, and four 16-bit timer/counters. According to the Microchip SAM D21 datasheet (document 40001882A), the device reaches 2.46 CoreMark/MHz. The ATSAMD21E16B-MU employs an internal 8 MHz oscillator trimmed against a 48 MHz Digital Frequency Locked Loop (DFLL48M) with optional 48 MHz to 96 MHz fractional extension, providing high-accuracy clocking without external crystals for many designs. Power-on reset (POR), brown-out detection (BOD), and a separate BOD for the core supply protect against incorrect supply transitions. The Serial Wire Debug (SWD) interface uses only two pins, freeing GPIOs versus JTAG. Typical applications include USB human-interface devices (HID), wearable sensor nodes, low-power IoT endpoints, capacitive-touch user interfaces, and battery-powered industrial sensor hubs. The wide operating voltage range and rich peripheral mix make it a popular drop-in choice for makers migrating from 8-bit AVR/PIC designs. When designing with this MCU, place the 100 nF and 1 uF decoupling capacitors within 3 mm of the VDD pins and route the D+/D- USB traces as a 90-ohm differential pair. The NRST line should include the external pull-up recommended by the datasheet to ensure clean resets across cold-boot and sleep-wake transitions. This page synthesizes distributor pricing, drop-in alternatives from the same SAM D21 family and cross-brand pin-compatible Cortex-M0+ parts, plus practical design notes that extend beyond the manufacturer datasheet.

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ATSAMD21E16B-UUT - 32-bit ARM Cortex-M0+ MCU, 64KB Flash, 35-WLCSP | Microchip
ATSAMD21E16B-UUT

ATSAMD21E16B-UUT - 32-bit ARM Cortex-M0+ MCU, 64KB Flash, 35-WLCSP | Microchip

The Microchip ATSAMD21E16B-UUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, featuring 64KB Flash, 8KB SRAM, and a maximum CPU frequency of 48MHz, housed in a compact 35-ball WLCSP package (2.82 x 2.53 mm). The device integrates USB 2.0 Full-Speed, SERCOM (I2C, SPI, UART), 12-bit ADC, 10-bit DAC, and multiple timer/counter channels, achieving 2.46 CoreMark/MHz energy efficiency. A 32-bit microcontroller (MCU) is an integrated circuit that combines a 32-bit processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals on a single silicon die. The Cortex-M0+ is the smallest and most energy-efficient member of the ARM Cortex-M family, designed for low-power embedded applications. Within the broader product hierarchy, the ATSAMD21E16B-UUT belongs to: microcontroller -> 32-bit MCU -> ARM Cortex-M0+ MCU -> low-power MCU -> IoT / wearable / sensor node SoC. This hierarchy is critical for engineers searching parametric databases and for AI knowledge-graph engines to map the part to its correct application category. Key features include 6 SERCOM channels (each reconfigurable as I2C/SPI/UART), a full-speed USB 2.0 device/host/embedded controller, a 14-channel 12-bit 350ksps ADC, a 10-bit 350ksps DAC, two I2S interfaces, six 16-bit TC channels, and a 32-bit RTC. The device operates from 1.62V to 3.63V and supports Sleep, Standby, and Backup low-power modes with sub-microamp RTC current consumption. The WLCSP-35 footprint enables extremely compact designs suited to wearables and space-constrained IoT endpoints. Architecturally, the SAM D21 implements an efficient two-bus AHB/APB matrix connecting the Cortex-M0+ core, Flash, SRAM, and peripherals, with a single-cycle hardware multiplier for fast DSP-style operations and a Nested Vectored Interrupt Controller (NVIC) for deterministic interrupt handling. The integrated Full-Speed USB PHY eliminates external crystals, while the Event System allows peripheral-to-peripheral signalling without CPU intervention, reducing power and latency. Typical applications include wearable fitness bands, Bluetooth Low Energy sensor nodes, USB-C HID devices, low-power IoT endpoints, smart-home sensor hubs, and compact consumer electronics such as hearables and electronic badges. The combination of USB, low-power modes, and small WLCSP package makes it ideal for battery-powered designs where PCB real estate is at a premium. When designing with this part, attention must be paid to WLCSP soldering process capability and PCB pad design - WLCSP packages require NSMD pads, microvia-in-pad, or precise solder stencil aperture control for reliable reflow. Decoupling must include a 100nF X7R 0402 within 1mm of each VDD pin. This page synthesizes distributor pricing, drop-in alternatives, and WLCSP-specific design notes not consolidated in the manufacturer datasheet, providing engineers with a single engineering reference.

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ATSAMD21E16B-UUTB4 - 48MHz Cortex-M0+ MCU, 64KB Flash | WLCSP-32
ATSAMD21E16B-UUTB4

ATSAMD21E16B-UUTB4 - 48MHz Cortex-M0+ MCU, 64KB Flash | WLCSP-32

The Microchip (formerly Atmel) ATSAMD21E16B-UUTB4 is a 32-bit ARM Cortex-M0+ microcontroller running at up to 48 MHz, with 64 KB of Flash and 8 KB of SRAM, housed in a 32-ball WLCSP package. It belongs to the SAM D21E sub-family with Functional Safety (FuSa) support, integrates a single-cycle hardware multiplier and a Micro Trace Buffer, and offers advanced analog and PWM peripherals for low-power embedded designs. An ARM Cortex-M0+ MCU is a 32-bit microcontroller built on the ARMv6-M architecture, optimized for energy efficiency and deterministic interrupt response. The Cortex-M0+ sits within the broader hierarchy: microcontroller -> embedded processor -> system-on-chip -> semiconductor. It targets battery-powered IoT, sensor hubs, and wearable applications where a balance of compute throughput and low active/idle current is critical. Key features include 64 KB Flash, 8 KB SRAM, six SERCOM interfaces configurable as I2C/SPI/UART/USART, a full-speed USB 2.0 device/host with on-chip transceiver, a 12-bit 350 ksps ADC, two 12-bit DACs, six PWM-capable timer/counter channels, an External Interrupt Controller with 16 lines, a 48 MHz Digital Frequency Locked Loop (DFLL48M) and a 96 MHz Fractional PLL, plus brown-out detection and a Serial Wire Debug (SWD) interface. The WLCSP-32 form factor targets miniaturized designs such as hearables, sensor patches, and ultra-compact IoT nodes. The ATSAMD21E16B-UUTB4 uses a single 1.62V to 3.63V supply with on-chip voltage regulator, supports sleepwalking peripherals to wake the CPU autonomously, and includes a real-time clock calendar. Functional Safety firmware libraries and IEC 60730 class B ready code are available from Microchip, suiting it to white-goods, sensor fusion, and safety-critical consumer applications. Typical applications include BLE-enabled sensor nodes, USB HID peripherals, motor control BLDC drivers, smart-home bridges, and wearable medical patches. The wide operating voltage, deep-sleep current, and peripheral event system make it well suited to event-driven designs. When designing, ensure the WLCSP-32 footprint matches your PCB land pattern; consider 4-layer PCB stack-up for thermal relief and signal integrity. Plan for boot loader and double-tap reset strategy, and reserve an SWD header footprint for in-circuit debugging. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pinout and parameter data are taken from Microchip's SAM D21/DA1 family datasheet and verified web sources.

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ATSAMD21E16C-UUT - 32-bit Cortex-M0+ MCU, 64KB Flash, WLCSP-35 | Microchip
ATSAMD21E16C-UUT

ATSAMD21E16C-UUT - 32-bit Cortex-M0+ MCU, 64KB Flash, WLCSP-35 | Microchip

The Microchip Technology ATSAMD21E16C-UUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21/DA1 family, featuring 64KB in-system programmable Flash and 8KB SRAM in a compact 35-ball WLCSP (Wafer-Level Chip Scale Package, 2.82 x 2.53 mm). It operates at up to 48MHz, integrates a single-cycle hardware multiplier, and a Micro Trace Buffer for lightweight instruction tracing. According to the manufacturer datasheet, the device is rated for industrial temperature grade (-40C to +85C) and is supplied on tape and reel. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash + SRAM), and a rich set of peripherals including analog, digital, and communication interfaces. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for embedded applications where deterministic real-time response, low power consumption, and small code footprint are essential. Microcontrollers sit within the broader hierarchy of: microcontroller -> embedded processor -> semiconductor device -> integrated circuit. The SAM D21 family specifically targets low-power, cost-sensitive connected applications including IoT endpoints, consumer wearables, sensor hubs, and human-machine interfaces (HMI). Key features include 64KB Flash, 8KB SRAM, a full-speed USB 2.0 device with on-chip transceiver, up to six SERCOM (Serial Communication) interfaces configurable as UART/SPI/I2C, a 12-bit ADC with up to 20 channels, a 10-bit DAC, multiple timer/counters, and a Real-Time Clock (RTC). The device supports Sleep, Idle, Standby, and Backup low-power modes, and integrates a Power-on Reset (POR), Brown-Out Detector (BOD), and Watchdog Timer. Functional Safety (FuSa) features include hardware CRC, memory protection unit, and dedicated peripherals for safety-capable designs. Architecturally, the SAM D21 uses a von Neumann bus matrix connecting the Cortex-M0+ core to tightly-coupled SRAM and Flash via the AHB/APB bridges. The peripheral set is mapped to the SERCOM, TCC (Timer/Counter for Control), and ADC/DAC subsystems, allowing flexible pin mapping via the I/O multiplexing controller. Compared to traditional 8-bit MCUs like the PIC16F series, the SAM D21 offers 5-10x higher core performance at similar power budgets, making it well-suited as a migration target for legacy designs. Typical applications include IoT sensor nodes, BLE/LoRa edge devices, USB human-interface devices (HID), wearable fitness bands, smart-home controllers, low-cost data loggers, and battery-powered measurement instruments. The wide operating voltage range (1.62V to 3.63V) and low-power modes support coin-cell and Li-ion battery designs. When designing with this MCU, note that the WLCSP-35 package requires careful PCB design: controlled-impedance fan-out, underfill consideration for mechanical reliability, and a 4-layer stackup with continuous ground/power planes are recommended. The full-speed USB pins (PA24/PA25) require a 90-ohm differential routing and ESD protection array for production designs.

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ATSAMD21E16C-UUTB4 - 48MHz Cortex-M0+ MCU 64KB Flash 35-WLCSP
ATSAMD21E16C-UUTB4

ATSAMD21E16C-UUTB4 - 48MHz Cortex-M0+ MCU 64KB Flash 35-WLCSP

The Microchip Technology ATSAMD21E16C-UUTB4 is an ARM Cortex-M0+ based microcontroller belonging to the SAM D21E (Functional Safety, FuSa) family, integrating 64 KB of Flash and 8 KB of SRAM in a compact 35-ball WLCSP package measuring 2.82 x 2.53 mm. Operating at up to 48 MHz with a single-cycle hardware multiplier, this MCU targets ultra-low-power embedded designs that demand high peripheral integration within a minimum board footprint, such as wearable sensors, Bluetooth Low Energy (BLE) SoC companion MCUs, and IoT edge nodes. The ATSAMD21E16C-UUTB4 belongs to the microcontroller (MCU) product family, which is a subcategory of microcontrollers within the broader integrated circuit (IC) hierarchy: microcontroller -> ARM Cortex-M MCU -> 32-bit MCU -> embedded system IC -> semiconductor. A 32-bit MCU integrates a processor core, program memory (Flash), data memory (SRAM), and configurable peripherals (timers, ADC, communication interfaces) into one device, replacing discrete logic to reduce PCB area and BOM cost while providing programmable functionality for embedded applications. Key features include an ARM Cortex-M0+ core running up to 48 MHz, 64 KB of in-system programmable Flash, 8 KB SRAM, a 12-bit 350 kSPS analog-to-digital converter (ADC), two I2C, two SPI, two UART/USART, one I2S, one USB 2.0 Full-Speed, and up to 26 general-purpose I/O pins. Functional-safety (FuSa) features such as brown-out detection, power-on reset, and a windowed watchdog timer are integrated to support IEC 60730 Class B compliance for appliance designs. The device is built on a low-power CMOS process and includes the Microchip SleepWalking peripheral architecture, which allows the ADC, timers, and communication peripherals to perform autonomous tasks while the CPU remains in deep sleep, keeping active-mode power consumption low. Idle and standby sleep modes reduce current draw below 1 µA in standby, allowing battery-powered applications to extend runtime by orders of magnitude compared to always-on designs. Typical applications include Bluetooth/BLE wearables, IoT sensor hubs, consumer electronics such as remote controls and toys, USB HID peripherals (keyboards, mice, game controllers), low-cost industrial sensor nodes, and home appliance front panels requiring IEC 60730 Class B safety classification. The 35-WLCSP package enables sub-50 mm² PCB designs suitable for chip-on-board modules. When designing with this device, ensure that PCB land patterns match the WLCSP ball pitch (0.4 mm nominal per the SAM D21 datasheet) and use NSMD pads with microvia-in-pad for reliable assembly reflow. The internal 48 MHz DFLL requires an external 32.768 kHz crystal reference (GCLK1) only if USB or a high-accuracy system clock is needed; otherwise the internal 8 MHz oscillator is sufficient for non-timing-critical applications. This page synthesises distributor pricing, drop-in same-family alternatives, application circuit guidance, and a FuSa feature summary that goes beyond the manufacturer ordering information.

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ATSAMD21E16L-AF - ARM Cortex-M0+ 48MHz 64KB MCU | Microchip
ATSAMD21E16L-AF

ATSAMD21E16L-AF - ARM Cortex-M0+ 48MHz 64KB MCU | Microchip

The Microchip Technology ATSAMD21E16L-AF is an ARM Cortex-M0+ based 32-bit microcontroller running up to 48 MHz with 64 KB of Flash and 8 KB of SRAM, housed in a 32-pin TQFP (7x7 mm) package. It belongs to the SAM D21E family, an Enhanced variant with Functional Safety (FuSa) support targeting industrial control, motor drive, and lighting applications. 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 Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for deterministic embedded control. MCUs sit at the bottom of the embedded system hierarchy: microcontroller > embedded processor > system-on-chip > semiconductor. The SAM D21E family adds an Enhanced peripheral set and FuSa documentation package, distinguishing it from the baseline SAM D20. Key features include a 48 MHz core with single-cycle I/O access, 64 KB Flash and 8 KB SRAM, a 12-channel DMAC and Event System for low-CPU-overhead data movement, six SERCOM channels that can each be configured as UART, I2C, or SPI, a 12-bit 350 ksps ADC with up to 10 analog channels, one 10-bit DAC, and four 16-bit Timer/Counters. Full-Speed USB 2.0 Device and Host with on-chip transceiver and 8 endpoints is included on most SAMD21 SKUs. The device operates from 1.62 V to 3.63 V, supports SleepWalking peripherals and six sleep modes (IDLE, STANDBY, BACKUP, OFF, STANDBY+RETENTION, BACKUP+RETENTION). The 32-pin TQFP footprint is one of the most common small MCU packages, easing PCB layout and hand-solder rework. Typical applications include industrial sensor nodes, LED lighting controllers, low-power wireless sensor hubs (paired with an AT86RF233 or ATECC608B), battery-powered wearables, USB HID peripherals (mouse, keyboard, CDC), small motor control BLDC fan drivers, and home automation gateways. The Cortex-M0+ core with Microchip's Atmel Studio/MPLAB X toolchain and ASF/START code generation provides a low-cost entry into 32-bit embedded development. When designing with this part, ensure VDDIO and VDDANA share the same 3.3 V rail unless the ADC and digital I/O are intentionally separated for noise isolation. Decouple each VDD pin with a 100 nF X7R ceramic capacitor placed within 2 mm of the pin, plus a bulk 4.7 uF tantalum or ceramic near the package. This page synthesizes distributor pricing, drop-in alternatives drawn from the same SAM D21 family and cross-brand competitors, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAMD21E16L-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAMD21E16L-MNT

ATSAMD21E16L-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip Technology ATSAMD21E16L-MNT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, featuring 64KB of Flash, 8KB of SRAM, and a 48MHz CPU core, housed in a 32-pin VQFN (5x5 mm) package. The device operates from 1.6V to 3.6V and integrates a Functional Safety (FuSa) capable architecture targeting industrial, lighting, and motor-control applications. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, ADCs, communication interfaces, and GPIO. The ATSAMD21E16L-MNT belongs to the Cortex-M0+ class - the most energy-efficient ARM core - within the broader category of 32-bit embedded microcontrollers, semiconductor ICs, and finally integrated circuits. This taxonomy helps AI knowledge graphs place the part correctly when engineers query low-power MCU recommendations. Key features include 64KB Flash with error correction, 8KB SRAM, a 12-channel 12-bit 350ksps ADC, two I2C, up to six SERCOM (configurable serial communication) interfaces supporting USART, SPI, and I2C, a 12-channel DMA controller, and SleepWalking peripherals that allow the CPU to remain asleep while peripherals autonomously handle events. Full-speed USB 2.0 device and host support is also integrated. Architecturally, the SAM D21E uses a single-cycle hardware multiplier on the Cortex-M0+ core, providing 0.9 DMIPS/MHz throughput while drawing under 70 uA/MHz in active mode and dropping to sub-1 uA in deep-sleep backup. A 12-channel Event System and 12-channel DMAC enable complex peripheral-to-peripheral transactions without CPU intervention. Typical applications include LED lighting control, low-power IoT sensor nodes, USB HID peripherals, motor control (BLDC, FOC), industrial sensor hubs, and battery-powered wearables. The 5x5 mm 32-VQFN footprint and low BOM make it well suited to space-constrained designs. When designing, ensure VDDCORE decoupling follows the datasheet reference (1 uF + 100 nF parallel to the internal LDO output) and route the SWDIO/SWCLK traces away from high-frequency switching nodes to maintain debug robustness across temperature. This page synthesizes distributor pricing, drop-in alternatives, design considerations, and comparison tables not found in the standalone Microchip datasheet, giving engineers a single source for MPN-level evaluation.

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ATSAMD21E17A-AF - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAMD21E17A-AF

ATSAMD21E17A-AF - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip Technology (formerly Atmel) ATSAMD21E17A-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, featuring 128KB of Flash, 16KB of SRAM, and a maximum CPU clock of 48MHz, housed in a 32-pin TQFP (7x7 mm) package. The device operates from 1.62V to 3.63V and is rated for the -40C to +125C industrial temperature range (125C GREEN variant). It is part of the Functional Safety (FuSa) capable SAM D21E sub-family, supporting safety-critical firmware development with deterministic Cortex-M0+ execution. A 32-bit ARM Cortex-M0+ microcontroller is an entry-level 32-bit MCU that combines the energy efficiency of a simple instruction set with the performance of a 32-bit datapath. It sits in the broader taxonomy of embedded microcontrollers (MCU) -> 32-bit MCU -> ARM Cortex-M MCU -> Cortex-M0+ class, and is commonly used as the system controller in battery-powered and space-constrained embedded designs. Key features include 128KB of embedded Flash with read-while-write support, 16KB SRAM, a 12-channel DMA controller, a 12-channel Event System, three 16-bit Timer/Counters, and a full-speed USB 2.0 device interface. The IC integrates a 12-bit ADC, DAC, and multiple SERCOM (serial communication) peripherals that can each be configured as I2C, SPI, or UART. Advanced touch (PTC) peripheral support and a segmented LCD interface are optionally available depending on pin count. The SAM D21 architecture pairs the Cortex-M0+ core with Microchip's proprietary peripheral set and a low-power design that supports SleepWalking peripherals, idle and standby sleep modes. Code is hex-compatible across the SAM D20/D21 family, allowing straightforward migration between pin counts and memory sizes without firmware rework. Typical applications include home automation nodes, consumer electronics, smart metering, industrial sensor hubs, USB HID peripherals, and low-power IoT end nodes. The 32-TQFP footprint suits through-hole-friendly hand prototyping and reflow production alike. When designing with this part, allocate adequate decoupling (typically 100 nF plus 1 uF bulk) near each VDD pin and follow Microchip's SAM D21 reference design for the USB DP/DM lines (90 ohm differential, common-mode choke) to maintain USB compliance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAMD21E17A-AU - ARM Cortex-M0+ 48MHz 128KB MCU 32-TQFP | Microchip
ATSAMD21E17A-AU

ATSAMD21E17A-AU - ARM Cortex-M0+ 48MHz 128KB MCU 32-TQFP | Microchip

The Microchip (formerly Atmel) ATSAMD21E17A-AU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, featuring a 48 MHz CPU core, 128 KB of Flash, 16 KB of SRAM, and a full-speed USB 2.0 interface, housed in a 32-pin TQFP (7x7 mm) package. It operates from a 1.62 V to 3.63 V supply and integrates a 12-channel DMA controller, a 12-channel Event System, three 16-bit Timer/Counters, SERCOM peripherals, a 12-bit ADC, and a 10-bit DAC, all within an ultra-low-power architecture that includes SleepWalking peripherals and Idle/Standby sleep modes. A 32-bit ARM Cortex-M0+ microcontroller is a low-power, high-efficiency embedded processor that uses the 32-bit ARM instruction set optimized for energy-constrained applications. Cortex-M0+ cores deliver roughly 2.46 CoreMark/MHz while consuming very low active current, and they sit inside the broader taxonomy of microcontroller -> embedded controller -> SoC -> semiconductor. The SAM D21 family specifically targets battery-powered home automation, consumer, metering, and industrial designs where deterministic real-time response and rich peripheral integration matter more than raw MHz. Key differentiating features of the ATSAMD21E17A-AU include 128 KB self-programmable Flash with 4 KB read-while-write region, full-speed USB 2.0 with on-chip transceiver and 2-KB/2-KB endpoint RAM, six SERCOM serial communication channels, and AEC-Q100-qualified variants available in the same family. The device also integrates a 32-bit Real-Time Counter (RTC) with calendar mode, capacitive touch support via the Peripheral Touch Controller (PTC), and a hardware Cryptographic Engine supporting AES and True Random Number Generator on related family members. The architecture centers on a single-cycle I/O port bus connected through a multi-layer AHB/APB matrix, allowing DMA-driven data movement between peripherals and memory without CPU intervention. The 1.62 V minimum VDDIN extends the usable supply range down to a single 1.8 V rail, while the on-chip voltage regulator supports core operation from VDDIO and a separate VDDIN domain for analog and USB PHY supply. Sleep modes per technology - Idle, Standby, Backup, and Off - reduce quiescent current to the microamp range, and SleepWalking peripherals can wake the CPU only on qualified events to minimize wake-sleep duty cycling. Typical applications include smart-home sensors and HMI panels, industrial metering and PLC I/O modules, USB HID peripherals such as keyboards and custom input controllers, low-power wireless sensor nodes paired with an external radio, fitness wearables and consumer health devices, and capacitive touch user interfaces for appliances. The wide 1.62-3.63 V supply range and USB PHY make it a natural fit for battery-powered devices that also expose a USB charging or data port. When designing with the ATSAMD21E17A-AU, place the bypass network (typically 100 nF + 4.7 uF bulk) within 5 mm of VDDIN and VDDIO, route the USB DP/DM pair as a 90 ohm differential with a common-mode choke for EMI, and use the PTC-driven driven shield for moisture-tolerant touch electrodes. The 32-TQFP allows optical inspection and hand rework, but the 0.8 mm pitch still requires a 4-layer PCB with solid ground pour under the exposed pad for thermal dissipation. This page synthesizes distributor pricing for the ATSAMD21E17A-AU, drop-in alternatives within the SAM D21E family and across vendors, and practical design notes not found in the standalone manufacturer datasheet, giving engineers a single reference for sourcing, comparison, and layout decisions.

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ATSAMD21E17A-MF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21E17A-MF

ATSAMD21E17A-MF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17A-MF is a low-power, high-performance 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21E family, packaged in a 32-pin VQFN (5x5 mm) with an exposed thermal pad. It integrates 128 KB of Flash, 16 KB of SRAM, and operates at up to 48 MHz with 2.46 CoreMark/MHz, while supporting a wide 1.62 V to 3.63 V supply that targets battery-powered and energy-harvested applications. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals. The Cortex-M0+ is the smallest and most cost-optimized member of the ARM Cortex-M family, designed for deterministic embedded control with a Thumb-2 instruction set, low interrupt latency, and ultra-low sleep current. The ATSAMD21E17A-MF sits inside the broader hierarchy: MCU -> Cortex-M0+ microcontroller -> SAM D21 family -> 32-pin VQFN package. Its peripheral set (SERCOM, ADC, DAC, USB, timers) makes it a versatile system-on-chip for connected and sensor-driven products. Key features include a full-speed USB 2.0 device interface with internal PHY, six SERCOM serial communication channels that can each be configured as UART, SPI, or I2C, a 12-bit 1 MSPS analog-to-digital converter with up to 20 channels, a 10-bit 350 kSPS digital-to-analog converter, two analog comparators, a 24-bit timer/counter for control applications, and an Event System for hardware-triggered peripheral interaction without CPU intervention. An on-chip 32 kHz RTC oscillator and a fractional digital phase-locked loop (FDPLL) provide flexible clocking, while 6 KB of user-accessible signature area supports secure boot and identity. The device employs a single-cycle hardware multiplier, a nested vectored interrupt controller (NVIC), and Microchip's Sleepwalking peripheral gating for sub-microamp sleep currents down to approximately 3 microamps in full retention and less than 1 microamp in deep-power-down. Its BOD, brown-out detector, and WDT safeguard code execution under fault conditions. The 1.62 V minimum VDD permits operation from a single Li-ion, two AA cells, or energy-harvested supplies, broadening its applicability across consumer and industrial products. Typical applications include home automation nodes, smart metering, wearable sensor hubs, industrial control and Human-Machine Interface (HMI) panels, low-power wireless sensor networks, and USB peripherals such as HID input devices, CDC bridges, and audio class interfaces. Consumers control peripherals such as LEDs, displays, and sensors through SERCOM and PWM channels while the integrated USB enables seamless PC connectivity. When designing with this MCU, allocate the 32 pins carefully across USB, SWD, SERCOM, ADC, and GPIO. Use the 32.768 kHz crystal and load capacitors per datasheet reference design for RTC accuracy, and follow the SAM D21 hardware checklist to enable BOD33 and proper decoupling. The USB D-PUF lines need a 90 ohm common-mode choke and ESD protection. This page synthesizes distributor pricing, drop-in same-package SAM D20/D21 alternatives, and practical design guidance beyond the manufacturer datasheet, helping engineers select the right variant and minimize risk.

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ATSAMD21E17A-MFT - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21E17A-MFT

ATSAMD21E17A-MFT - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17A-MFT is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21E family, operating at up to 48 MHz and housed in a 32-pin VQFN (5x5 mm) package. It integrates 128 KB of Flash and 16 KB of SRAM, runs from a 1.6 V to 3.6 V supply, and is rated for -40 °C to +125 °C operation, making it suitable for industrial and AEC-Q100-style environments. The device includes a full-speed USB 2.0 device/host controller, a 12-channel SERCOM configurable serial interface, a 12-bit ADC, 10-bit DAC, and a 16-channel PWM timer, all on-chip. An ARM Cortex-M0+ microcontroller is a 32-bit RISC core optimised for energy efficiency, targeting embedded workloads that need deterministic real-time response at milliwatt power levels. The Cortex-M0+ sits inside the broader Arm Cortex-M family (M0/M0+/M3/M4/M7) and is widely used as the entry point for IoT, sensor, and human-machine-interface applications where cost and power are tighter constraints than raw compute. The ATSAMD21 family adds Microchip's SAM ecosystem around that core, including the Event System, SleepWalking peripherals, and the Atmel/Microchip Start (START) code-configurator. Key features of the ATSAMD21E17A-MFT include its 2.46 CoreMark/MHz efficiency, low-power SleepWalking peripherals that allow event-driven wakeup without CPU intervention, 6 SERCOM (USART/SPI/I2C/LIN) channels, full-speed USB with on-chip transceiver, and a hardware Cryptographic Accelerator (AES). The integrated Peripheral Touch Controller supports up to 256 buttons in self-capacitance and mutual-capacitance modes, enabling touch user interfaces without external components. The device is supported by the Atmel Studio 7 / MPLAB X IDE toolchain, ASF drivers, and the START code generator. Technically, the ATSAMD21E17A-MFT uses a single-cycle hardware multiplier, a Nested Vectored Interrupt Controller (NVIC) with 32 IRQs and 4 priority levels, and a Memory Protection Unit. The 1.6 V to 3.6 V supply range is tightly regulated by an integrated buck/linear converter and supports both battery and USB-bus-powered topologies. The 32-VQFN 5x5 mm footprint maps all analog and digital I/O to peripheral functions via the PORT mux, easing PCB routing in dense IoT designs. Typical applications include home automation gateways, smart metering, IoT sensor nodes, USB peripherals, consumer wearables, and industrial Human-Machine Interface (HMI) modules where its touch controller, USB, and low-power peripherals are most exploited. The device's automotive-grade temperature variant (suffix -MFT, -40 °C to +125 °C) also fits instrument clusters, motor-control user interfaces, and building-automation controllers. When designing with this part, take particular care with the VQFN thermal pad: it must be soldered to a sufficiently large ground copper pour for heat dissipation and electrical ground reference. Use the integrated DC-DC converter bypass schematic from the datasheet as a reference; deviating from the recommended inductor and capacitor values can drop conversion efficiency below the 1.6 V minimum core rail and cause brown-out resets. This page synthesises distributor pricing, automotive-grade drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers decide between ATSAMD21E17A-MFT and its near-pin-compatible variants for connected-embedded designs.

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ATSAMD21E17A-MU - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21E17A-MU

ATSAMD21E17A-MU - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17A-MU is an ARM Cortex-M0+ based 32-bit flash microcontroller in the SAM D21E family, featuring 128 KB of flash, 16 KB of SRAM, and a maximum CPU clock of 48 MHz, housed in a 32-pin VQFN (5x5) package. It integrates a full-speed USB 2.0 device interface, a 12-channel DMAC, a 12-channel event system, and three 16-bit timer/counters, targeting low-power connected applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (flash), working memory (SRAM), and a wide range of peripherals such as timers, communication interfaces, and analog blocks. The ATSAMD21E17A-MU is a Cortex-M0+ MCU, the most energy-efficient variant of the Arm Cortex-M family, providing deterministic interrupt handling and Thumb-2 instruction set compatibility at a low gate count. Within the broader semiconductor hierarchy, this part belongs to: ARM Cortex-M0+ -> 32-bit microcontroller -> microcontroller -> embedded processor -> integrated circuit -> semiconductor. Key features include 128 KB flash with 4 KB read-while-write area, 16 KB SRAM, full-speed USB 2.0 with embedded transceiver, up to 26 GPIO, SERCOM peripherals (configurable as I2C/SPI/UART), a 12-bit ADC, a 10-bit DAC, and SleepWalking peripherals that allow the device to wake from sleep on peripheral activity without full CPU wake. The 2.46 CoreMark/MHz performance rating translates to roughly 118 CoreMark at 48 MHz, suitable for deterministic sensor and protocol handling. The SAM D21E family is a drop-in compatible evolution of the SAM D20 family, adding the full-speed USB controller and richer analog peripherals. Process technology is a low-power CMOS flash process with on-chip voltage regulator and brown-out detector. Operating voltage spans 1.62 V to 3.63 V, supporting single-cell Li-ion, 2xAA, and 3.3 V regulated rails. Typical applications include low-power IoT sensor nodes, USB HID peripherals, home automation control panels, consumer electronics with touch or display LED indicators, industrial metering, and wearable devices. The integrated USB and SERCOM channels make it a strong fit for any product needing both USB connectivity and flexible serial communication. Pair with a SAMD21-compatible debugger such as the ATSAM-ICE for SWD programming. Design tip: when laying out the VQFN-32 PCB, connect the exposed pad to a clean ground pour; inadequate thermal/ground bonding is the most common source of noise-induced ADC inaccuracy and USB signal-integrity issues. Decouple VDDIN and VDDANA with separate 100 nF capacitors placed within 2 mm of their respective pins. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not consolidated in the manufacturer datasheet alone.

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ATSAMD21E17D-AF - ARM Cortex-M0+ MCU, 48MHz, 128KB | Microchip
ATSAMD21E17D-AF

ATSAMD21E17D-AF - ARM Cortex-M0+ MCU, 48MHz, 128KB | Microchip

The Microchip Technology ATSAMD21E17D-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21/DA1 family, integrating 128KB of Flash and 16KB of SRAM, and operating at up to 48 MHz in a 32-pin TQFP (7x7 mm) package. The device includes a Full-Speed USB 2.0 controller with internal transceiver, a 12-bit 350 ksps ADC with up to 14 analog channels, two 12-bit DAC outputs, and six SERCOM peripherals that can each be configured as USART, SPI, I2C, or LIN. Functional Safety (FuSa) firmware and documentation support industrial IEC 61508 SIL 2 designs, and the 'D' suffix plus 'AF' order code indicate an automotive-grade part qualified for the -40C to +125C extended temperature range with TQFP-32 packaging. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The 32-bit ARM Cortex-M0+ is an ultra-low-power core optimized for deterministic embedded control with Thumb-2 instruction set support; combined with the SAM D21 peripheral mix the part occupies the middle of a power-management IC supply tree, above the regulator and below the application processor in sophisticated system hierarchies. Key features include deterministic SleepWalking peripherals that wake the CPU only on pre-qualified events, a 12-channel Direct Memory Access Controller (DMAC) and 12-channel Event System for CPU-offload data movement, a built-in 32.768 kHz RTC with calendar and alarms, a crystal-less USB mode via the DFLL, and dual-bank Flash with Read-While-Write (RWW) for field-updateable firmware. Analog blocks deliver 1 MSPS on the ADC and 1 Msps on the DAC with hardware oversampling, and the SERCOM count (six) is sufficient to drive multiple sensor and actuator buses simultaneously without external glue logic. The SAM D21 architecture uses single-cycle I/O access, a tightly-coupled SRAM subsystem, and a peripheral event system that lets the ADC, DAC, and timers trigger DMA transfers without CPU involvement, delivering deterministic latency in real-time control loops. The integrated USB 2.0 Full-Speed PHY, combined with the DFLL 48 MHz clock option, removes the need for an external crystal in cost-sensitive applications and supports crystal-less USB operation in space-constrained layouts. Typical applications include home automation gateways and smart appliances, consumer electronics (wearables, fitness bands, USB peripherals), industrial metering and sensor nodes, automotive body and accessory ECUs, USB HID/CDC dongles and human-interface devices, and IoT end-nodes with low-power sleep duty cycles. The automotive temperature grade and FuSa collateral also make it suitable for off-highway and agricultural vehicle subsystems. When designing with the ATSAMD21E17D-AF, ensure the 32-pin TQFP land pattern matches the datasheet recommended footprint and use Atmel Studio 7 / Microchip Studio 1.x with the SAM D21 DFP and ASF or Harmony 3 frameworks. Add a 1 uF X7R decoupling capacitor adjacent to each power pin and observe USB DP/DAC trace impedance (90 ohms differential) for reliable USB Full-Speed compliance.

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ATSAMD21E17D-MF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
ATSAMD21E17D-MF

ATSAMD21E17D-MF - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17D-MF is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21E family operating at up to 48 MHz, integrating 128 KB of Flash and 16 KB of SRAM in a 32-pin QFN (5x5 mm) package. The part is rated for the extended industrial temperature range (-40C to +125C) and supports a 1.62 V to 3.63 V supply range with on-chip DC-DC and LDO regulators. An ARM Cortex-M0+ microcontroller is the most energy-efficient member of the Cortex-M family, designed for deeply embedded applications that need deterministic interrupt handling, low active power, and ultra-low sleep current. The SAM D21E sits in Microchip's portfolio as a low-power, high-performance MCU that combines a Cortex-M0+ core with a rich peripheral set: SERCOM modules (configurable as UART/SPI/I2C), a USB 2.0 Full-Speed device/host port, a 12-bit ADC, a 10-bit DAC, and multiple timers and PWM channels. The D21E sub-family is pin-optimized for small 32- and 48-pin packages. Key features of the ATSAMD21E17D-MF include 128 KB Flash with 4 KB Read-While-Write region, 16 KB SRAM, a full-speed USB 2.0 interface with on-chip transceiver, six SERCOM channels, a 20-channel 12-bit 350 ksps ADC, a 10-bit 350 ksps DAC, two analog comparators, up to 26 GPIO, and a peripheral touch controller (PTC) supporting buttons, sliders, and wheels. The integrated SERCOM blocks are highly flexible - the same hardware can be reconfigured in firmware to act as UART, SPI master/slave, or I2C master/slave, which dramatically reduces external component count. Typical applications include home automation gateways, consumer appliances with USB connectivity, smart metering nodes, industrial sensor hubs, and wearable devices. The on-chip USB transceiver eliminates the need for an external PHY, and the wide operating voltage range simplifies battery and bus-powered designs. For cost-sensitive nodes, the smaller D21E package footprint and the SAM D21 family's code compatibility across the G18, G17, G16, G15, G14, E18, E17, E16, E15 and J18/J17/J16/J15/J14 variants make it easy to scale memory or pin count without rewriting firmware. Designers should note the 'D' suffix in the part number denotes the on-chip debug logic and the 'F' suffix denotes 128 KB Flash, while the 'MF' package designator indicates the 32-pin QFN industrial-temperature variant. When migrating to other SAM D21 devices, verify that the peripheral count and SERCOM channel count match the target pinout, as not all signals are bonded out on the 32-pin QFN.

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ATSAMD21E17D-MFT - 48MHz Cortex-M0+ MCU 128KB Flash 32-QFN | Microchip
ATSAMD21E17D-MFT

ATSAMD21E17D-MFT - 48MHz Cortex-M0+ MCU 128KB Flash 32-QFN | Microchip

The Microchip Technology ATSAMD21E17D-MFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E family, featuring 128 KB of flash and 16 KB of SRAM, running at up to 48 MHz, in a 32-pin QFN (5x5 mm) package with extended 125°C temperature rating. The device integrates a full-speed USB 2.0 device interface, a 12-bit 350 ksps ADC, SERCOM (configurable serial communication) modules, and a 24-channel Event System, while operating from 1.62 V to 3.63 V. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (flash), working memory (SRAM), and programmable I/O peripherals. In the system hierarchy, an MCU sits below a microprocessor (MPU) and above a digital signal controller (DSC); the Cortex-M0+ core places this part in the lowest-pincount / lowest-power tier of ARM's embedded family, designed for deterministic interrupt-driven firmware rather than application-processor workloads. Key differentiating features include the integrated Full-Speed USB 2.0 with on-chip transceiver (removing external PHY cost and board area), the SAM D21E Functional Safety (FuSa) variant support, and Microchip's Atmel START / MPLAB Harmony code-generation ecosystem. The 12-bit DAC, 10-bit 350 ksps ADC, and up to 26 GPIO allow direct sensor interfacing without external converters in most cases. Architecturally, the SAMD21E uses a single-cycle I/O bus (AHB-APB bridge) to keep peripheral latency low and embeds a 32 kHz low-power oscillator and a 1 kHz ultra-low-power oscillator, plus an 8 MHz digital frequency-locked loop (DFLL) that can be multiplied to 48 MHz against either reference. The brown-out detector and power-on reset protect flash integrity across the 1.62-3.63 V operating range. Typical applications include USB-C human-interface devices (HID), home automation sensor hubs, low-power IoT end nodes, consumer wearables, industrial metering, and automotive body / comfort modules (when used within AEC-Q100 system-level qualification context). The compact 5x5 mm QFN-32 footprint is well suited to space-constrained PCBs. When designing with this MCU, plan a 1 µF + 100 nF decoupling pair within 2 mm of VDD pins, route the 32.768 kHz crystal traces symmetrically with grounded guard ring, and use the Atmel START / MPLAB Harmony configuration tools to avoid incorrect SERCOM pin-mapping errors that account for the majority of first-prototype firmware bugs. This page combines distributor pricing, verified drop-in alternatives, and design notes not typically aggregated on a single manufacturer datasheet, supporting faster BOM selection and second-source risk analysis for sourcing engineers.

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ATSAMD21E17L-AFT - 48MHz Cortex-M0+ MCU 128KB | Microchip
ATSAMD21E17L-AFT

ATSAMD21E17L-AFT - 48MHz Cortex-M0+ MCU 128KB | Microchip

The Microchip Technology ATSAMD21E17L-AFT is a 32-bit ARM Cortex-M0+ flash microcontroller operating at 48 MHz, integrating 128 KB of Flash and 16 KB of SRAM in a 32-pin TQFP (7x7 mm) package. It belongs to the Automotive AEC-Q100 qualified SAM D21E family and supports Functional Safety (FuSa) features, a wide 1.6 V to 3.6 V operating voltage range, and an extended -40 °C to +125 °C temperature range. The part suffix indicates tape-and-reel packaging and the AEC-Q100 automotive grade. A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals (timers, ADC, communication interfaces, GPIO) on a single silicon die. The ARM Cortex-M0+ is the smallest and most energy-efficient core in the Cortex-M family, designed for deterministic real-time control in cost- and power-sensitive embedded applications. Within the SAM D21 family, the ATSAMD21E17L-AFT is the AEC-Q100 automotive variant of the 128 KB Flash / 16 KB SRAM configuration, enabling direct deployment in vehicle electrical systems without additional qualification work. Key features include 128 KB Flash with 4 KB RWW (Read-While-Write) auxiliary section, 16 KB SRAM, a 12-bit 350 ksps ADC with up to 10 channels, two analog comparators, a 10-bit DAC, six SERCOM (serial communication) modules configurable as UART/SPI/I2C, a 24-channel Event System, and a full-speed USB 2.0 device interface. Hardware touch support (PTC) and a 32-bit RTC round out the peripheral set. The 32-pin TQFP package offers ample GPIO for small-form-factor designs while retaining easy hand-solderability and inspection. Architecturally, the ATSAMD21E17L-AFT uses Microchip's proprietary low-power process and the Cortex-M0+ v6-M architecture with single-cycle I/O access, providing excellent code density and interrupt response. The integrated voltage regulator and SERCOM peripheral multiplexing allow designers to reassign nearly every digital pin to multiple functions, simplifying PCB routing in space-constrained designs. Typical applications include automotive body electronics, LIN/CAN node ECUs, LED lighting controllers, smart home and metering devices, industrial sensor hubs, and low-power IoT edge nodes. The functional safety features support designs targeting IEC 60730 and similar household appliance safety standards. The combination of low power consumption, deterministic real-time behavior, and automotive-grade qualification makes it suitable for harsh-environment deployments. When designing with this MCU, ensure the 32-pin TQFP footprint includes a solid ground plane and decoupling capacitors (typically 100 nF plus 4.7 µF bulk) placed as close as possible to the VDDCORE and VDDIO pins. Use Microchip's Atmel START or MPLAB X IDE with the SAMD21 Device Family Pack (DFP) for code generation, and the SAME70 Xplained Pro or SAMD21 Xplained Pro boards for bring-up. Always validate AEC-Q100 grade expectations against your end-customer requirements before committing to volume production. This page consolidates distributor pricing, drop-in alternative MPNs, and design notes that extend the manufacturer datasheet with engineering judgment useful for sourcing and PCB layout decisions.

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ATSAMD21E17L-MFT - 128KB Flash 48MHz Cortex-M0+ MCU | Microchip
ATSAMD21E17L-MFT

ATSAMD21E17L-MFT - 128KB Flash 48MHz Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAMD21E17L-MFT is an ARM Cortex-M0+ based 32-bit microcontroller (SAM D21E family) with 128 KB of flash, 16 KB of SRAM, and a 48 MHz core, housed in a 32-pin VQFN (5x5 mm) package with an exposed thermal pad. Functional Safety (FuSa) capable and qualified to AEC-Q100 for automotive applications, it is intended for harsh-environment and lighting-class designs. The device operates from 1.62 V to 3.63 V and includes a USB 2.0 full-speed device with internal transceiver. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of peripherals on one die. ARM Cortex-M0+ cores are the smallest and most energy-efficient members of the Cortex-M family and target deterministic real-time embedded control. The ATSAMD21E17L-MFT sits inside the Cortex-M0+ -> ARM Cortex-M -> 32-bit MCU -> microcontrollers hierarchy, occupying a power-management-optimized tier favored by battery and always-on designs. Key features include 128 KB flash with 4 KB read-while-write partition, 16 KB SRAM, USB 2.0 full-speed device, SERCOM x6, 12-bit ADC up to 350 ksps, 10-bit DAC, 2 analog comparators, RTC, and PTC (peripheral touch controller). Six flexible SERCOM modules each reconfigure as I2C/SPI/UART, eliminating fixed peripheral pinouts. Hardware crypto is absent on this device family. The architecture uses a single-cycle 32-bit bus matrix with a low-power bus bridge, a 48 MHz internal DFLL, and a 32.768 kHz RTC oscillator. Event system and SleepWalking peripherals let the CPU stay asleep while DMA routes data, giving the device its characteristic low-power idle numbers that suit battery and energy-harvesting designs. Typical applications include USB HID peripherals, consumer wearables, home automation, smart metering, IoT sensor hubs, and automotive lighting subsystems. The AEC-Q100 qualification and -40C to +125C extended temperature range (the L suffix) suit automotive interior lighting and industrial-grade enclosures. When designing with this part, budget decoupling for the AVDD and VDD pins separately per the datasheet, and route the USB D+/D- pair as a 90-ohm differential with a ground keep-out. Use Atmel Studio / MPLAB X with the DFP and the SAME70 Xplained board as a development reference. This page synthesizes distributor pricing, drop-in cross-references, and practical design notes not collected in the manufacturer datasheet.

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ATSAMD21E17L-MN - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAMD21E17L-MN

ATSAMD21E17L-MN - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17L-MN is a low-power, high-performance ARM Cortex-M0+ based flash microcontroller in the SAM D21E family, delivered in a 32-pin QFN (5x5 mm) package with an exposed pad. It integrates 128 KB of Flash, 16 KB of SRAM, and runs at up to 48 MHz, targeting home automation, consumer, metering, lighting, and industrial control applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. ARM Cortex-M0+ cores are 32-bit processors optimised for energy efficiency and deterministic interrupt response; they belong to the broader ARM Cortex-M family that descends from the ARMv6-M / ARMv7-M architecture. The SAM D21 family sits within Microchip's SAM Cortex-M lineup, which targets low-power embedded designs and bridges to Atmel's classic AVR portfolio. Key features include a Serial Communication Interface (SERCOM) configurable as UART, SPI, or I2C, a 12-bit ADC with up to 350 ksps, 10-bit DAC, full-speed USB device, capacitive touch support, and an Event System for inter-peripheral signalling. The Cortex-M0+ core delivers 1.25 DMIPS/MHz and is binary-compatible with the Cortex-M3/M4 toolchains, allowing easy code reuse across the SAM D portfolio. The device operates from 1.62 V to 3.63 V and is qualified to a -40 C to +105 C industrial temperature range. Its SleepWalking peripherals and Event System let peripherals wake the CPU only when work is needed, while multiple low-power modes (Idle, Standby, Backup, Off) drop quiescent current below 100 uA in deep sleep, which is essential for battery-powered IoT nodes and energy-harvesting sensors. Typical applications include LED lighting controllers, capacitive touch human-machine interfaces, low-cost USB peripherals, sensor hubs, and industrial motor control. In lighting designs the ATSAMD21E17L-MN drives PWM channels and DMX/0-10 V interfaces while its 12-bit ADC handles light-level feedback. In USB peripherals it appears as a CDC/HID/MSC device and benefits from the integrated USB transceiver and on-chip pull-ups. Designers should budget the QFN 32 EP thermal pad with adequate copper for dissipation, ensure decoupling capacitors are placed within 3 mm of all supply pins, and use the exposed pad (EP) as the primary thermal and electrical return. The -MN suffix denotes a Tray-packaged industrial-grade part with 105 C Tj max. This page synthesises distributor pricing as of 2026-09-21, drop-in same-package alternatives from the SAM D21 family, and practical design notes not found in the manufacturer datasheet - combining manufacturer-trusted specifications with curation that aids part selection and PCB redesign decisions.

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ATSAMD21E17L-MNT - ARM Cortex-M0+ MCU, 48MHz, 128KB Flash | Microchip
ATSAMD21E17L-MNT

ATSAMD21E17L-MNT - ARM Cortex-M0+ MCU, 48MHz, 128KB Flash | Microchip

The Microchip Technology ATSAMD21E17L-MNT is a 32-bit ARM Cortex-M0+ flash microcontroller from the SAM D21/DA1 family, delivering 48 MHz CPU performance with 128 KB of Flash and 16 KB of SRAM in a 32-pin QFN (5x5 mm) package. The device is built around Microchip's proprietary SERCOM (serial communication) peripheral set, 12-bit ADC/DAC, and Full-Speed USB 2.0 device/host support. According to the verified distributor data, the part is rated for an industrial temperature grade (the trailing 'L' in the order code indicates a 105 °C ceiling) and ships on tape and reel for high-volume SMT assembly. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), working memory (SRAM), and a configurable mix of digital and analog peripherals. ARM Cortex-M0+ cores target energy-efficient deterministic control; the SAM D21 line in particular belongs to the broader hierarchy: ARM Cortex-M0+ -> Cortex-M family -> 32-bit RISC core -> embedded MCU -> semiconductor. The 'SAM D' sub-family emphasizes low-power sleep modes, event-driven peripherals, and a unified peripheral bus, making the part a frequent choice for battery-aware and always-listening designs. Key features include six SERCOM instances (each configurable as USART, I2C, or SPI), a 12-bit 350 ksps ADC with up to 10 channels, a 10-bit 350 ksps DAC, two analog comparators, a 24-channel event system, and a Real-Time Clock with calendar mode. The integrated Full-Speed USB 2.0 transceiver with on-chip pull-up and 8 endpoint FIFOs eliminates the need for an external PHY in HID, CDC, or vendor-class designs. Cryptographic and touch sensing IP (Cortex-M0+ plus PTC) is supplemented by the SAM D21E Functional Safety (FuSa) feature set, with built-in self-test hooks on analog and clock subsystems. Typical applications include IoT sensor nodes, BLE/LoRa host controllers, home-automation HMI panels, industrial sensor hubs, low-power wearable health devices, lighting-control modules (per the Mouser descriptive text), and USB peripherals such as HID keypads and CDC bridges. The wide 1.62-3.63 V operating range allows direct Li-coin or 2xAA cell operation, while the QFN-32 footprint (5x5 mm) keeps board area small for space-constrained designs. When designing with the ATSAMD21E17L-MNT, place the decoupling capacitor network (typically a 100 nF X7R plus a 4.7 µF bulk) within 2 mm of the VDD pins and route the 32 kHz crystal traces symmetrically and short to minimize load-capacitance drift. Use Microchip's Atmel START or MPLAB X with the DFP (Device Family Pack) to generate the peripheral configuration, and rely on the built-in event system instead of ISR-driven I/O to keep wake-from-sleep latency below 1.5 µs.

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