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ATSAML11E16A-MU - ARM Cortex-M23 32MHz 64KB Flash MCU | Microchip
ATSAML11E16A-MU

ATSAML11E16A-MU - ARM Cortex-M23 32MHz 64KB Flash MCU | Microchip

The Microchip Technology ATSAML11E16A-MU is a 32-bit ARM Cortex-M23 microcontroller running at up to 32 MHz, integrating 64 KB of embedded Flash and 16 KB of SRAM in a 32-pin VQFN (5x5 mm) package with TrustZone-M security. According to the Microchip product page, it consumes less than 25 uA/MHz in active mode and less than 100 nA in sleep mode, making it the industry's lowest-power Cortex-M23 MCU with chip-level tamper resistance and ARM TrustZone technology. The device is part of the SAM L11 family, which is the first Cortex-M23 implementation to add hardware-enforced secure and non-secure code partitioning. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O. The Cortex-M23 is ARM's smallest and most energy-efficient application processor, designed as a successor to the Cortex-M0/M0+ with branch prediction, single-cycle I/O, and an optional TrustZone-M extension. Within the SAM L11 hierarchy, ATSAML11E16A-MU sits in the high-memory tier (E = 64 KB Flash / 16 KB SRAM) versus the D14/D15/D16 variants. The L11 sits inside Microchip's MCU portfolio between the ultra-low-power SAML10 and the Cortex-M4 SAM L21 families. Key features include integrated crypto accelerators (AES, SHA, TRNG), secure key storage, tamper detection, a 12-bit 1 Msps ADC, a 10-bit DAC, two analog comparators, an op-amp, a peripheral touch controller (PTC), and six SERCOM channels that can be configured as UART, SPI, I2C, or LIN. The device operates from 1.62 V to 3.63 V across -40 C to +85 C (industrial grade) and supports both 1.6 V and 3.3 V typical rails. Architecture-wise, the ATSAML11E16A-MU pairs the Cortex-M23 core with Microchip's Event System, SleepWalking peripherals, and an 8-channel DMA. TrustZone-M enables secure boot and isolated execution, with secure peripherals such as the RTC and integrity check monitor (ICM) dedicated to the secure world. Hardware crypto blocks offload AES-128/256 and SHA-1/2 from software, reducing active current during TLS handshakes by an order of magnitude versus pure software implementations. Typical applications include IoT edge nodes with secure cloud onboarding, wireless sensor nodes (paired with ATECC608B secure element or SAM W25 SoC), battery-powered smart locks and access control, secure medical sensors, asset-tracking BLE beacons, and industrial PLC safety I/O. The integrated PTC enables capacitive touch interfaces for HMI front panels without an external touch IC. Designers should evaluate power budgets carefully: at 3.3 V, 32 MHz, and full peripheral activity, the budget of <25 uA/MHz implies roughly 800 uA active current; sleep mode below 100 nA enables multi-year coin-cell operation when SleepWalking peripherals are used. Always provide a 100 nF decoupling capacitor on each VDD pin and a 4.7 uF bulk capacitor on the main rail. This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical TrustZone design notes not found in the manufacturer datasheet alone, providing a single source of truth for engineers evaluating the SAM L11 family.

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ATSAML11E16A-MUKPH - Cortex-M23 MCU, TrustZone, 64KB Flash | Microchip
ATSAML11E16A-MUKPH

ATSAML11E16A-MUKPH - Cortex-M23 MCU, TrustZone, 64KB Flash | Microchip

The Microchip Technology ATSAML11E16A-MUKPH is an ultra-low-power 32-bit ARM Cortex-M23 microcontroller running at up to 32 MHz with 64 KB of Flash, 16 KB of SRAM, and 2 KB of EEPROM, housed in a 32-pin VQFN (5x5 mm) package with exposed pad. As a member of the SAM L11 family, it integrates ARM TrustZone-M technology for hardware-isolated secure and non-secure code execution, a Crypto Accelerator supporting AES, SHA, and True Random Number Generation, and secure key storage. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), peripherals, and I/O into one package. The Cortex-M23 specifically is an ARMv8-M Baseline architecture core designed for energy-efficient deterministic embedded computing. Within the broader taxonomy, this device sits inside the Microcontroller > ARM Cortex-M > Cortex-M23 subfamily > ultra-low-power secure MCU product tree. TrustZone-M is the smallest Cortex-M variant that supports hardware-enforced security partitioning, making it suitable for IoT edge devices that must protect keys and firmware from physical and remote attacks. Key features include active-mode current below 25 uA/MHz, sleep-mode current below 100 nA with full SRAM retention, a 12-bit 1 Msps ADC, a 10-bit DAC, two analog comparators, one operational amplifier, a Peripheral Touch Controller (PTC) supporting capacitive touch, and up to six SERCOM serial interfaces configurable as I2C, SPI, or USART/UART. The device also offers LINbus support, a 16-bit timer/counter array, and Real-Time Clock with calendar. Operating voltage spans 1.62 V to 3.63 V across the -40 C to +85 C industrial temperature range. The SAM L11 architecture implements secure boot, secure firmware update, secure debug, and anti-tamper detection, with key provisioning baked into the part number suffix. The TrustZone Security Attribution Unit (SAU) and Implementation Defined Attribution Unit (IDAU) partition flash, RAM, and peripherals into secure/non-secure regions. The Cortex-M23 core includes a single-cycle hardware multiplier and a hardware divider, deterministic interrupt latency with NVIC, and WFI/WFE sleep modes. Typical applications include IoT end nodes with secure firmware update, smart meters and utility metering, access control and authentication tokens, secure wireless sensor nodes, medical wearables requiring FDA-grade data protection, and industrial control modules needing cryptographic identity. The 32-pin VQFN footprint suits space-constrained PCB designs, while the integrated PTC eliminates external touch controllers, reducing BOM cost by 15 to 30 percent. When designing with this device, allocate the TrustZone linker regions early in the project because secure pin/peripheral assignment cannot be undone without re-flashing the chip's NVM bits. Decouple VDDIO and VDDANA separately per the SAM L10/L11 family datasheet, and follow the Microchip ASF/MPLAB Harmony start-up sequence to avoid NVMCTRL lock-up. The -MUKPH suffix indicates tray packing with secure key provisioning at the factory. This page synthesizes distributor stock, drop-in alternatives from the SAM L10/L11 family and competing 32-pin VQFN Cortex-M23 MCUs, and practical secure-MCU design notes not found in the manufacturer datasheet alone.

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ATSAML11E16A-MUT - Cortex-M23 32MHz 64KB Flash MCU | Microchip
ATSAML11E16A-MUT

ATSAML11E16A-MUT - Cortex-M23 32MHz 64KB Flash MCU | Microchip

The Microchip Technology ATSAML11E16A-MUT is a 32-bit ARM Cortex-M23 based microcontroller from the SAM L11 family, operating at up to 32 MHz with 64 KB of Flash and 16 KB of SRAM, housed in a 32-pin VQFN (5x5 mm) package with an exposed thermal pad. It operates from a 1.62 V to 3.63 V supply, draws less than 25 uA/MHz in active mode and less than 100 nA in sleep mode, and is the industry's first Cortex-M23 MCU with chip-level security and ARM TrustZone technology. The device integrates secure key storage, chip-level tamper resistance, and a hardware cryptographic accelerator supporting AES, SHA, and True Random Number Generator (TRNG) functions. The 'E16A' suffix denotes the 64 KB Flash / 16 KB SRAM variant, and the 'MUT' suffix indicates 32-VQFN package, -40C to +85C industrial temperature, and Tape & Reel packaging. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for code, SRAM for data), and a rich set of peripherals (timers, ADC, communication interfaces, GPIO) on one die. MCUs belong to the broader family of embedded processors and dominate low-power, real-time control applications. The Cortex-M23 is Arm's smallest and most energy-efficient TrustZone-capable core, positioned between the Cortex-M0+ (no TrustZone) and the Cortex-M33 (with DSP and FPU), making the SAM L11 ideal for secure, low-power IoT endpoints. The 'SAM' family hypernym chain: SAM L11 -> Cortex-M23 MCU -> ARM-based microcontroller -> embedded processor -> semiconductor IC. Key differentiating features include ARM TrustZone for hardware-enforced isolation between secure and non-secure code, a Secure Boot Loader, a hardware Crypto Accelerator (AES-128/256, SHA-256, TRNG), up to 51 GPIO, a 12-bit 1 MSPS ADC, and a 10-bit 350 kSPS DAC. The 32-VQFN package has a thermal resistance of approximately 30 C/W, and the device supports Sleep, Standby, and Backup modes with fast wake-up times below 2 us from Sleep. It is qualified to industrial temperature grade (-40C to +85C) and is RoHS compliant. Typical applications include secure IoT sensor nodes, smart meters, wearable health monitors, secure authentication peripherals, home automation hubs, and battery-powered edge AI inference devices. The TrustZone and crypto accelerator make it especially suited for products requiring end-to-end secure firmware update (SUOTA) and tamper-resistant credential storage. When designing with this MCU, allocate at least one decoupling capacitor (100 nF) per VDD pin and place the exposed pad (EP) to a large ground copper pour for thermal dissipation. For secure applications, configure the TrustZone Attribute Unit (TAU) during boot to lock peripheral and memory access rights, and use the Boot ROM Secure Boot Loader to verify application firmware signatures before execution. Programming is supported by Microchip Studio, MPLAB X IDE, and Atmel START.

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ATSAML11E16A-UUTKPH - 32MHz Cortex-M23 TrustZone MCU | Microchip
ATSAML11E16A-UUTKPH

ATSAML11E16A-UUTKPH - 32MHz Cortex-M23 TrustZone MCU | Microchip

The Microchip ATSAML11E16A-UUTKPH is an ultra-low-power 32-bit ARM Cortex-M23 microcontroller with TrustZone-M security, 64KB Flash and 16KB SRAM, housed in a 32-pin WLCSP package. It integrates ARM TrustZone technology, secure key storage, chip-level tamper resistance, and a peripheral touch controller (PTC), drawing less than 25 uA/MHz in active mode and less than 100 nA in sleep mode. What is a low-power microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and peripherals on one die. Ultra-low-power MCUs target battery-operated endpoints such as IoT sensors, wearables, and smart meters, where power budget measured in microamps determines battery life. The SAM L11 family sits in the broader hierarchy: MCU -> ARM Cortex-M microcontroller -> low-power secure MCU -> IoT edge controller -> semiconductor. Key features include a 32 MHz Cortex-M23 core with single-cycle I/O access, TrustZone-M for hardware-isolated secure firmware execution, on-chip cryptographic accelerators (AES, SHA, TRNG), and a 12-bit 1 MSPS ADC, 10-bit DAC, and analog comparators. The Enhanced Peripheral Touch Controller supports up to 256 buttons, while SERCOM modules provide configurable UART, SPI, and I2C interfaces. Sleep-mode current under 100 nA enables multi-year coin-cell operation. The SAM L11 architecture pairs a Cortex-M23 core with TrustZone-M for hardware-enforced separation between secure and non-secure code. Secure boot, secure key storage in on-chip flash, and tamper detection (voltage, temperature, frequency, and active mesh) deliver chip-level security that traditionally required external secure elements. The on-chip DC-DC converter and Smart Sleep modes minimize active and idle energy, while the Event System allows peripherals to communicate without CPU wake-up. Typical applications include IoT sensor nodes, secure medical wearables, smart-home and building automation endpoints, secure payment terminals, and battery-powered touch-interface products. The TrustZone capability targets devices requiring secure firmware update, secure boot, and protected key storage, while the PTC supports capacitive touch keypads and sliders in low-power HMI designs. When designing with this device, allocate pin function priorities early because the WLCSP-32 pinout shares SERCOM, I/O, and PTC lines; reserve one SERCOM channel for debug and another for the host UART. The chip-level tamper pins require board-level shield routing and dedicated capacitors to meet the Microchip reference design guideline. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the standalone Microchip SAM L10/L11 datasheet, helping engineers compare variants and select the right package and temperature grade for IoT, medical, and industrial applications.

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ATSAML21E15B-ANT - 32KB Flash Cortex-M0+ MCU | Microchip | 32-TQFP
ATSAML21E15B-ANT

ATSAML21E15B-ANT - 32KB Flash Cortex-M0+ MCU | Microchip | 32-TQFP

The Microchip Technology ATSAML21E15B-ANT is an ultra-low-power 32-bit ARM Cortex-M0+ Flash microcontroller in the SAM L21E family, housed in a 32-pin TQFP (7x7 mm) package. Key headline parameters are 48 MHz core clock, 32 KB Flash, 4 KB SRAM, and a 1.6 V to 3.6 V supply range with active current under 35 µA/MHz and Sleep-mode current as low as 200 nA. The -ANT suffix denotes the industrial 85°C/105°C TQFP-32 tape-and-reel variant of the B-revision silicon. What is an ultra-low-power Cortex-M0+ MCU? A microcontroller is a single-chip computer integrating a CPU core, memory, and peripherals; ARM Cortex-M0+ is the most energy-efficient ARM core for embedded designs, optimized for deterministic interrupt response and minimal gate count. The ATSAML21 family belongs to the broader category of low-power microcontrollers, which sit hierarchically between 8-bit MCUs (e.g., PIC16) and application processors (e.g., Cortex-A). It targets battery-powered and energy-harvesting applications where Sleep current dominates total energy consumption. Key features of the ATSAML21E15B-ANT include the Cortex-M0+ core with single-cycle I/O access, an on-chip full-speed USB 2.0 device, a 12-bit ADC, multiple SERCOM serial interfaces, and a Peripheral Touch Controller (PTC) supporting capacitive touch. The integrated Event System and SleepWalking peripherals allow peripherals to wake the CPU autonomously, eliminating the need to keep the core active for peripheral servicing. B-revision silicon adds enhanced functional-safety documentation per IEC 60730 Class B. The device uses a sophisticated power-management architecture with multiple Sleep modes (Idle, Standby, Backup, and Off) and an integrated buck-converter option on the L21 line. The Memory Protection Unit and TrustZone-M alternative support lightweight embedded security. The 32 KB Flash with 4 KB SRAM provides a balanced code-and-data budget for typical IoT nodes, sensor hubs, and Human-Machine Interface (HMI) firmware. Typical applications include wearable fitness bands, wireless sensor nodes, smart-home sensor hubs, low-power IoT edge devices, and battery-powered HMI panels with capacitive touch. The 48 MHz performance and 1.6 V minimum supply also suit coin-cell applications such as electronic shelf labels, remote controls, and medical patches where quiescent current is mission-critical. When designing with this MCU, prioritize Sleep-mode current in the energy budget - datasheet figures of 200 nA in Standby Sleep mode assume the PTC and ADC are configured with disabled bias and the on-chip voltage regulator in low-power mode. Pair the device with a low-quiescent LDO (such as the MCP1700) when using 3.6 V batteries to avoid regulator Iq overwhelming the MCU's own Sleep current. This page synthesizes distributor stock, parametric alternatives, and practical low-power design notes not consolidated on the manufacturer product page. Pricing reflects current 2026 distributor tier breaks.

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ATSAML21E15B-AUT - 32KB Flash Cortex-M0+ MCU | Microchip
ATSAML21E15B-AUT

ATSAML21E15B-AUT - 32KB Flash Cortex-M0+ MCU | Microchip

The Microchip ATSAML21E15B-AUT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21 family, featuring 32KB of Flash, 4KB of SRAM, and a 48 MHz maximum CPU clock speed, housed in a 32-pin TQFP (7x7 mm) package. It targets battery-powered and energy-harvesting applications where both active-mode efficiency (under 35 µA/MHz) and deep-sleep current (200 nA in Sleep mode) are critical design constraints. The integrated Cortex-M0+ core delivers deterministic performance with Thumb-2 instruction set support, while the on-chip peripherals include SERCOM (configurable serial communication), 12-bit ADC, DAC, and op-amps. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, and programmable I/O peripherals. The ARM Cortex-M0+ is an ultra-low-power 32-bit core optimized for embedded systems, widely used in IoT endpoints, wearable electronics, and sensor hubs. Within the SAM L21 family hierarchy, ATSAML21E15B sits between lower-pin-count SAM L10 devices and higher-memory SAM L21G/J variants, balancing I/O count (32-pin TQFP) with low-power features. Key features of the ATSAML21E15B-AUT include a 12-channel 12-bit ADC with up to 1 MSPS sampling, configurable SERCOM modules that operate as UART, SPI, or I2C, an on-chip temperature sensor, and full-speed USB device support. The integrated Power Management Unit (PMU) enables multiple SleepWalking standby modes that allow peripherals to wake the CPU only on relevant events. The device operates from a 1.62V to 3.63V supply, supporting direct connection to single-cell Li-ion or two AA cells. Typical applications include wearable fitness trackers, IoT sensor nodes, low-power wireless modules, smart thermostats, and battery-powered industrial sensors. The combination of Cortex-M0+ processing power and sub-microamp Sleep current makes this MCU ideal for designs where battery life spans years rather than weeks. Engineers should leverage the Peripheral Touch Controller and Event System to minimize CPU wake-up events and maximize energy efficiency.

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ATSAML21E15B-MNT - 32KB Flash Cortex-M0+ MCU 32-VQFN | Microchip
ATSAML21E15B-MNT

ATSAML21E15B-MNT - 32KB Flash Cortex-M0+ MCU 32-VQFN | Microchip

The Microchip Technology ATSAML21E15B-MNT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21E family, featuring 32KB of Flash and 4KB of SRAM, operating at up to 48 MHz, and housed in a 32-pin VQFN (5x5 mm) package. It integrates sophisticated power management that consumes under 35 µA/MHz in active mode and drops to 200 nA in Sleep mode, targeting battery-powered IoT endpoints, wearables, and energy-harvesting designs. An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed for energy-efficient embedded applications. The Cortex-M0+ sits within the broader hierarchy: Cortex-M0+ -> ARM Cortex-M family -> 32-bit MCU -> embedded microcontroller -> semiconductor. The SAM L21E family extends this with Microchip's proprietary picoPower technology, multiple low-power operating modes, and an integrated Peripheral Touch Controller (PTC) for capacitive touch sensing, enabling human-machine interfaces without external components. Key differentiating features include 12-bit ADC and 12-bit DAC, full-speed USB 2.0 device support, SERCOM (serial communication) interfaces configurable as UART/SPI/I2C, a Real-Time Clock (RTC) with calendar, and 24 wake-up sources via the Event System. Functional Safety (FuSa) variants (suffix A) include enhanced diagnostics for IEC 60730 Class B compliance, making the family suitable for white goods and safety-critical applications. The wide 1.6V to 3.6V operating range supports single-cell Li-ion, two-AA, and coin-cell battery topologies. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart home wireless endpoints (BLE/Zigbee co-processor hosts), capacitive touch user interfaces, and industrial sensor transmitters. The combination of sub-µA sleep current and fast wake-up (1.5 µs typical from standby) makes it ideal for duty-cycled edge devices where total energy budget dominates battery life calculations. When designing with the SAM L21E, select the appropriate sleep mode (Idle, Standby, Backup) based on required peripheral availability - Standby preserves RTC and 1.5 µA wake-up, while Backup drops to ~200 nA but loses RAM retention. Always place a 1 µF + 100 nF decoupling pair within 3 mm of the VDD pins, and use the brown-out detector (BOD33) at 2.78V minimum for reliable 3.3V operation. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical low-power design notes not found in the standalone manufacturer datasheet.

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ATSAML21E15B-MUT - 32KB Flash Cortex-M0+ MCU | Microchip
ATSAML21E15B-MUT

ATSAML21E15B-MUT - 32KB Flash Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAML21E15B-MUT is an ultra-low-power ARM Cortex-M0+ microcontroller (MCU) from the SAM L21 family, integrating 32 KB of Flash and 4 KB of SRAM in a 32-pin VQFN (5x5 mm) package with an exposed pad. It runs at up to 48 MHz, supports 1.62V to 3.63V supply, and consumes under 35 µA/MHz in active mode and 200 nA in Sleep mode. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The ARM Cortex-M0+ is the smallest and most energy-efficient member of the ARM Cortex-M processor family, designed for embedded applications where low power, deterministic interrupt response, and small code footprint are critical. The SAM L21 family specifically targets battery-powered IoT endpoints, wearables, and Energy Harvesting designs where every microamp counts. Within the broader hierarchy, the ATSAML21E15B-MUT sits at: ARM Cortex-M0+ -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Key features include a 12-bit 1 Msps ADC, a 12-bit DAC, SERCOM (serial communication) peripherals configurable as UART/SPI/I2C, a 32 KB Flash program memory, 4 KB SRAM, an on-chip 32 kHz RTC oscillator, and a full-speed USB 2.0 device interface. It also supports SleepWalking peripherals and an Event System that allows peripherals to communicate without CPU intervention - a hallmark feature for low-power designs. The SAM L21 architecture combines an efficient Cortex-M0+ core with the Microchip Sleep Technology (Most) power-saving IP. It provides six different power domains and up to six low-power modes, with a dedicated RTC running from a 32 kHz crystal that keeps the device aware of the outside world while consuming only hundreds of nanoamps. The Event System and SERCOM configurability let the same silicon serve multiple roles in a BOM. Typical applications include battery-powered IoT sensor nodes, wearables and fitness trackers, energy-harvesting devices, smart-home wireless sensors (LoRa/Zigbee/Thread/BLE companion MCUs), industrial data loggers, and USB-powered human-interface devices such as custom keyboards or HID peripherals. When designing with this device, choose the right low-power mode for the duty cycle: Sleep mode for fast wake-up, Standby for RTC-only operation, and Backup for nanoamp quiescent current. Always place the decoupling network within 2 mm of the VDD pin, and connect the exposed pad to a continuous ground pour for thermal and electrical performance. This page synthesizes distributor pricing, drop-in same-package alternatives from the SAM L21 family, and practical low-power design notes that go beyond the manufacturer datasheet to help you select and use the part correctly.

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ATSAML21E16B-ANT - 32-bit Cortex-M0+ MCU 64KB Flash | Microchip
ATSAML21E16B-ANT

ATSAML21E16B-ANT - 32-bit Cortex-M0+ MCU 64KB Flash | Microchip

The Microchip Technology ATSAML21E16B-ANT is an ARM Cortex-M0+ based 32-bit ultra-low-power microcontroller (MCU) from the SAM L21 family with 64KB Flash and Functional Safety (FuSa) support, housed in a 32-pin TQFP (7x7 mm) package. It operates from a 1.62V to 3.63V supply, runs at up to 48 MHz, and integrates 8KB SRAM alongside the on-chip Flash. The device belongs to Microchip's SAM L21E sub-series and is qualified for functional-safety applications requiring IEC 60730 Class B compliance. What is a Cortex-M0+ MCU? An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core optimized for the smallest die area and lowest active power among the Cortex-M family. Cortex-M0+ MCUs sit in the hierarchy: microcontroller -> embedded MCU -> 32-bit MCU -> ARM Cortex-M family -> ultra-low-power class. They typically integrate Flash, SRAM, peripherals (ADC, timers, SERCOM), and clock generation onto a single die, serving as the central controller in battery-powered and sensor-driven embedded products. Key features of the ATSAML21E16B-ANT include active-mode current under 35 uA/MHz and a deep Sleep mode drawing as low as 200 nA, enabled by sophisticated power-management technology including multiple low-power modes, on-demand peripheral activation, and an event system that allows peripherals to communicate without waking the CPU. The integrated 12-bit ADC and 12-bit DAC, multiple SERCOM modules (configurable as UART/SPI/I2C), and a 32-pin TQFP footprint delivering up to 26 GPIO pins make it well suited for space-constrained low-power designs. Architecturally, the SAM L21E combines the Cortex-M0+ core with Microchip's proprietary SleepWalking peripheral controllers and an event system that enables I/O-driven state changes without CPU intervention, dramatically reducing average power in sensor-edge applications. The FuSa (Functional Safety) variant adds diagnostic libraries and documentation packages to support IEC 60730 Class B compliance for home appliances and similar regulated products. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart-home edge controllers, industrial wireless sensor transmitters, energy-harvesting devices, and home-appliance control boards. The wide 1.62V-3.63V supply range and 200 nA Sleep current make it particularly attractive for designs that spend most of their life in standby and wake briefly to take measurements. When designing with this part, evaluate peripheral activation patterns and SleepWalking configuration early - average power is dominated by how often peripherals wake the CPU rather than by active-mode current alone. Decoupling should follow Microchip's SAM L21 hardware design guidelines with a 100 nF close to each supply pair and a 4.7 uF bulk capacitor on VDDIN. This page synthesizes distributor pricing across 9+ sources, drop-in alternatives from Microchip's SAM L21 family, and practical design notes not consolidated in the manufacturer datasheet, giving engineers a single point of reference for BOM decisions.

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ATSAML21E16B-AUT - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAML21E16B-AUT

ATSAML21E16B-AUT - 48MHz Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip ATSAML21E16B-AUT is a 32-bit ARM Cortex-M0+ ultra-low-power microcontroller from the SAM L21E family, Functional Safety (FuSa) series, integrating 64KB of Flash and 8KB of SRAM in a 32-pin TQFP (7x7 mm) package. It runs at up to 48MHz, supports an operating voltage range of 1.62V to 3.63V, and includes an AEC-Q100 automotive qualification plus on-chip hardware touch (PTC), 12-bit ADC, DAC, and multiple serial interfaces including SERCOM (configurable as I2C/SPI/USART), I2S, and USB 2.0 Full-Speed device. A microcontroller (MCU) is a single-chip computer that integrates a CPU 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 embedded control where cost, power, and code density matter. The SAM L21 family extends this baseline with dedicated power-domain gating that drops active consumption below 35 uA/MHz and Sleep mode consumption to roughly 200 nA, making the part suitable for always-on, battery-powered edge nodes. Key differentiating features of the ATSAML21E16B-AUT include its Functional Safety (FuSa) support (IEC 60730 Class B library), up to 25 general-purpose I/O pins, a 12-bit 1 Msps ADC with up to 10 channels, two analog comparators, two DAC channels, a Real-Time Clock with calendar, and a Peripheral Touch Controller supporting buttons, sliders, wheels, and proximity sensing. Its SERCOM-based architecture allows each of the up to six serial interfaces to be software-configured as USART, I2C, or SPI, which dramatically simplifies BOM when multiple protocols are required. Architecturally, the device combines an event system for hardware-triggered task chaining without CPU wakeup, a SleepWalking peripheral set that wakes the core only on qualified events, and a low-power segmented LCD controller (in larger pin-count variants) plus an integrated Full-Speed USB 2.0 device transceiver with on-chip pull-up. The 32-pin TQFP-EP exposed-pad package provides a thermal pad for improved heat spreading in space-constrained designs. Typical applications include automotive body and HMI modules, ultra-low-power wireless sensor nodes, smart metering, wearable health and fitness devices, capacitive-touch user interfaces, USB-powered data loggers, and functional-safety industrial controls. The wide 1.62V-3.63V supply range supports direct operation from single-cell Li-ion or 3.3V regulated rails. When designing with this part, budget sleep-mode current at the 200 nA level (RTC running) and account for an additional 35 uA/MHz in active mode. The SERCOM pads must be mapped explicitly to GPIO pins in firmware - pinout flexibility is high, but the trade-off is that an incorrect MUX setting silently disables a peripheral. Use the SAM L21 Errata sheet and the Microchip MPLAB X IDE Harmony 3 framework for validated peripheral drivers. This page synthesizes distributor pricing, drop-in same-package alternatives within the SAM L21 family, and practical low-power design notes not found on a single manufacturer page.

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ATSAML21E16B-MUT - 48MHz Cortex-M0+ MCU, 64KB Flash, 32-VQFN
ATSAML21E16B-MUT

ATSAML21E16B-MUT - 48MHz Cortex-M0+ MCU, 64KB Flash, 32-VQFN

The Microchip Technology ATSAML21E16B-MUT is a 32-bit ARM Cortex-M0+ based ultra-low-power microcontroller in the SAM L21E family, integrating 64KB of Flash and 12KB of SRAM, and housed in a 32-pin VQFN (5x5 mm) package. It operates at up to 48 MHz and is qualified for Functional Safety (FuSa) applications, making it suitable for safety-critical IoT and industrial nodes. An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core designed by ARM Holdings for energy-efficient embedded applications. It belongs to the Cortex-M processor family, which itself sits within the broader category of microcontrollers (MCUs) - single-chip computers integrating CPU, memory, and peripherals. The Cortex-M0+ is the smallest and most energy-efficient member of the Cortex-M line, prioritizing low active current, deterministic interrupt latency, and a minimal gate count. It targets battery-powered and always-on applications such as sensor nodes, wearables, and remote controls, where the combination of computational headroom and ultra-low sleep current is essential. The ATSAML21E16B-MUT features Microchip's proprietary ultra-low-power technology, consuming under 35 µA/MHz in active mode and approximately 200 nA in Sleep mode. It integrates a high-speed 12-bit ADC, DAC, SERCOM (serial communication) interfaces, and a Real-Time Clock. The Functional Safety (FuSa) variant includes hardware safety features such as Error Code Correction (ECC) on Flash and RAM, CRC, and a windowed watchdog timer, supporting IEC 60730 class B requirements for household appliances. Architecturally, the SAM L21 family uses a Cortex-M0+ core paired with a low-power peripheral touch (PTC) controller, an Event System for inter-peripheral signaling without CPU intervention, and Sleepwalking peripherals that wake the core only when needed. This design enables event-driven operation that minimizes average power consumption in always-on sensor applications. Typical applications include battery-powered IoT sensor nodes, wearable health devices, smart metering, industrial sensor interfaces, low-power wireless MCUs (paired with external radio), and functional safety appliances. The wide operating voltage range (1.62V to 3.63V) supports both single-cell Li-ion and 3.3V industrial rails. When designing with the ATSAML21E16B-MUT, leverage the Event System and Sleepwalking peripherals to keep the CPU in deep sleep as long as possible. Configure the brown-out detector (BOD) at the minimum required threshold to avoid unnecessary resets, and use the RTC with calendar mode for periodic wake-ups instead of a hardware timer. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single-source decision aid for sourcing and selecting the right SAM L21 variant.

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ATSAML21E18B-AUT - ARM Cortex-M0+ 48MHz MCU | Microchip
ATSAML21E18B-AUT

ATSAML21E18B-AUT - ARM Cortex-M0+ 48MHz MCU | Microchip

The Microchip Technology ATSAML21E18B-AUT is an ARM Cortex-M0+ based 32-bit ultra-low-power microcontroller (MCU) with 256KB Flash and 40KB SRAM, operating at up to 48 MHz, in a 32-pin TQFP (7x7 mm) package. The device is part of the SAM L21E family and is engineered for functional safety (FuSa) applications, featuring sophisticated power management that delivers under 35 µA/MHz in active mode and 200 nA in Sleep mode. A microcontroller (MCU) is a programmable system-on-chip that integrates a CPU core, Flash program memory, SRAM data memory, and peripherals into a single device. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, optimized for cost-sensitive and ultra-low-power embedded applications. The SAM L21 family adds Microchip's proprietary power management techniques - SleepWalking, power domain gating, and ultra-low-power peripherals - that allow the CPU and peripherals to operate without always-on system clocks, dramatically extending battery life in IoT edge nodes. Key features include a 2.46 CoreMark/MHz performance rating, 12-bit ADC and 12-bit DAC on-chip, multiple low-power modes (Active, Idle, Standby, Backup, Off), and built-in safety mechanisms such as Memory Protection Unit (MPU), Hardware CRC, and Windowed Watchdog Timer (WWDT). The device supports 1.62V to 3.63V supply voltage, integrated SERCOM serial communication, and up to 27 GPIO. An Event System enables inter-peripheral signaling without CPU wake-up, reducing active current further. The ATSAML21E18B-AUT uses a Harvard-bus architecture with a 3-stage Cortex-M0+ pipeline, deterministic interrupt latency (12 cycles typical), and Single Wire Debug (SWD) interface. Memory is organized as 256KB Flash with ECC and 40KB SRAM, with 8KB low-power SRAM retained in Backup mode. The 12-bit ADC provides up to 1 MSPS with offset and gain error correction, and the 12-bit DAC supports 1 MSPS conversion rate - both run from the internal low-power analog reference. Typical applications include battery-powered IoT sensor nodes, wearable health monitoring devices, smart metering, industrial wireless sensor networks, and home automation gateways. The combination of 256KB Flash, 40KB SRAM, and sub-µA sleep current suits the device to products requiring local intelligence plus multi-year battery life. The integrated AES engine and True Random Number Generator (TRNG) also enable secure connected-node designs. When designing with this MCU, allocate pin function through the SAM L21 multiplexing table early in the schematic phase, because several peripheral functions share I/O lines. Always read the latest Microchip errata document before committing to the pinout, and size the decoupling network as recommended in the device datasheet to achieve the rated low-power numbers. The 200 nA Sleep-mode figure assumes the Backup SRAM is retained and the RTC is running from a 32.768 kHz crystal - losing either increases quiescent current. This page synthesizes distributor pricing, drop-in compatible variants, and FuSa-design considerations not found in the manufacturer's overview document.

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ATSAML21G16B-ANT - 32-bit Cortex-M0+ MCU, 64KB Flash, 48MHz | Microchip
ATSAML21G16B-ANT

ATSAML21G16B-ANT - 32-bit Cortex-M0+ MCU, 64KB Flash, 48MHz | Microchip

The Microchip Technology ATSAML21G16B-ANT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21 family, featuring 64KB Flash and 8KB SRAM in a 48-pin TQFP (7x7 mm) package. It operates from 1.6V to 3.6V, runs at up to 48 MHz, and is rated for the industrial -40C to +105C temperature range. The "ANT" suffix indicates TQFP48 package, -40C to 105C operating temperature, and Tape & Reel packaging. What is a low-power microcontroller? A microcontroller (MCU) is a single-chip computer containing a CPU core, Flash program memory, SRAM data memory, and a rich set of peripherals. An ultra-low-power MCU like the SAM L21 family adds sophisticated power management that minimizes active and sleep-mode current draw, making it the preferred choice for battery-powered and energy-harvesting products where every microamp matters. Within the broader taxonomy, the SAM L21 belongs to: microcontroller -> embedded processor -> ARM Cortex-M -> power management IC ecosystem -> semiconductor IC. Key features of the ATSAML21G16B-ANT include under 35 uA/MHz active current consumption and 200 nA in Sleep mode, an integrated Cortex-M0+ core delivering 1.48 CoreMark/MHz, a 12-bit ADC, multiple serial interfaces (SERCOM), and a hardware touch controller supporting Peripheral Touch Controller (PTC) buttons, sliders, and wheels. The device also integrates a full-speed USB 2.0 interface, an Event System for inter-peripheral signaling without CPU intervention, and SleepWalking peripherals that wake the CPU only when needed. The SAM L21 architecture uses a pipelined Cortex-M0+ core with single-cycle I/O access, deterministic interrupt latency, and a Memory Protection Unit. The 64KB Flash supports in-application programming and is paired with an 8-channel DMA controller for low-overhead data movement. Power is managed by a Sleep Modes Controller with Idle, Standby, Off, Backup, and Retention modes, enabling the <35 uA/MHz active and 200 nA Sleep power budget claimed in Microchip's family datasheet. Typical applications include IoT sensor nodes, wearable fitness bands, home automation devices, low-power wireless sensor hubs, and Human-Machine Interface (HMI) products using capacitive touch. The wide 1.6V-3.6V supply range simplifies designs powered directly from single-cell Li-Ion or two AA cells. The integrated USB 2.0 full-speed transceiver also supports PC peripherals and tethered accessories. When designing with the ATSAML21G16B-ANT, use Microchip's MPLAB X IDE with MPLAB Harmony 3 or ASF frameworks, and program/debug via the integrated Serial Wire Debug (SWD) interface. For optimal sleep-mode performance, route all wake-up sources through the Event System and avoid polling loops. Decouple VDDCORE and VDDIO close to the IC with 100 nF ceramic capacitors. This page synthesizes distributor pricing across 8+ sources, same-package drop-in alternatives, and engineering design notes beyond the manufacturer datasheet, giving procurement and design teams a single reference for the ATSAML21G16B-ANT.

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ATSAML21G16B-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip
ATSAML21G16B-MNT

ATSAML21G16B-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip

The Microchip Technology ATSAML21G16B-MNT is an ultra-low-power 32-bit ARM Cortex-M0+ Flash microcontroller (MCU) in the SAM L21 family, operating at up to 48 MHz with 64 KB of Flash and 8 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package. According to the Microchip SAM L21 family datasheet (DS60001477C), this device consumes under 35 µA/MHz in active mode and as little as 200 nA in Sleep mode, targeting battery-powered and energy-harvesting applications. What is an ARM Cortex-M0+ microcontroller? An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed for embedded systems that need deterministic real-time performance at very low power consumption. The Cortex-M0+ sits at the low-power end of the ARM Cortex-M family, using the Armv6-M architecture and the Thumb-2 instruction set, and integrates a Nested Vectored Interrupt Controller (NVIC) and Wake-up Interrupt Controller (WIC). MCUs based on this core (microcontroller -> RISC processor -> embedded processor -> semiconductor) are widely used in IoT, sensor hubs, wearables, and battery-powered industrial nodes. Key features of the ATSAML21G16B-MNT include the Cortex-M0+ core at 48 MHz, 64 KB Flash, 8 KB SRAM, multiple low-power modes (Sleep at 200 nA, Standby, Backup, and Off), 14 SERCOM channels (which can be configured as I2C, SPI, or UART), a 12-bit ADC with up to 20 channels, and built-in touch-support peripherals. The 48-pin QFN (7x7 mm) package provides a compact footprint with an exposed thermal pad for improved thermal dissipation in space-constrained designs. Technically, the SAM L21 family is built on an ultra-low-power process and integrates a sophisticated power management unit (PMU) that selects among active, idle, sleep, standby, backup, and off modes on a per-peripheral basis. The on-chip voltage regulator supports operation from 1.6 V to 3.6 V, and the device includes up to 5 SERCOM, 1 TC, 1 TCC, and various analog peripherals depending on pin count. The -MNT suffix denotes the 48-QFN package operating from -40°C to 85°C industrial range. Typical applications include IoT sensor nodes, wearable health and fitness devices, smart home sensors, low-power wireless modules, industrial battery-powered meters, and Human-Machine Interface (HMI) control with touch. The combination of 200 nA Sleep current and fast wake-up makes it ideal for systems that spend most of their time in deep sleep and only wake briefly to take measurements. When designing with the ATSAML21G16B-MNT, ensure that firmware implements proper Sleep mode entry via the ARM Wait-For-Interrupt (WFI) or Wait-For-Event (WFE) instructions, and that unused peripherals are clock-gated. The 48-QFN exposed pad must be soldered to the PCB ground plane for electrical and thermal performance. This page synthesizes distributor pricing, same-family alternatives, cross-references, and design notes not found in the manufacturer datasheet alone.

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ATSAML21G16B-MUT - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip
ATSAML21G16B-MUT

ATSAML21G16B-MUT - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip

The Microchip Technology ATSAML21G16B-MUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM L21G family, operating up to 48 MHz with 64 KB of Flash and 8 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package. It belongs to Microchip's ultra-low-power SAM L21 family, consuming under 35 uA/MHz in active mode and 200 nA in Sleep mode, and supports an extended industrial temperature range of -40C to +85C. The device is supplied with a 3.3 V typical operating voltage. An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed for energy-efficient embedded applications. It belongs to the ARM Cortex-M family (microcontroller class), within the broader ARM Cortex processor hierarchy. Cortex-M0+ cores integrate the processor, NVIC, debug logic and (in some implementations) Memory Protection Unit (MPU) on-chip, enabling deterministic real-time control at sub-dollar price points. The SAM L21 family adds Microchip's proprietary picoPower technology and a peripheral event system that lets peripherals trigger each other without CPU wake-up, which is why this MCU achieves Sleep currents below 200 nA. Key features of the ATSAML21G16B-MUT include SERCOM-configurable serial interfaces (up to 6), a 12-bit 1 MSPS ADC, 10-bit DAC, multiple timers (TC, TCC), a Real-Time Clock with calendar mode, and a full-speed USB 2.0 device controller. The device also integrates a segmented LCD driver (up to 8x32 segments) and a crypto engine supporting AES, SHA, and secure boot for tamper-resistant applications. The architecture uses a 2-layer AHB bus matrix connecting the Cortex-M0+ core to Flash, SRAM, and peripherals via separate low-power buses. The SleepWalking peripheral event system allows I/O and ADC-triggered wake-ups without CPU intervention, making it ideal for always-on IoT endpoints that spend most of their life in deep Sleep modes. The QFN-48 (7x7 mm) package with an exposed pad provides low thermal resistance for thermally constrained designs. Typical applications include battery-powered IoT sensor nodes, wearable fitness/health devices, smart utility metering, electronic shelf labels, and remote control units. The combination of 64 KB Flash, USB, and segmented LCD support makes it a strong fit for low-power connected devices requiring a small display. When designing with the SAM L21, prioritize using the SAM L21 Event System and SleepWalking to keep the CPU in Sleep mode as long as possible. Decouple VDDIO and VDDCORE properly with 100 nF ceramic capacitors close to each pin, and connect the QFN exposed pad to a continuous ground plane for thermal and electrical reference. This page synthesizes distributor pricing, drop-in SAM L21 alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand ultra-low-power Cortex-M0+ options.

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ATSAML21G17B-ANT - 48MHz ARM M0+ MCU 128KB | Microchip
ATSAML21G17B-ANT

ATSAML21G17B-ANT - 48MHz ARM M0+ MCU 128KB | Microchip

The Microchip Technology ATSAML21G17B-ANT is an ultra-low-power ARM Cortex-M0+ 32-bit microcontroller from the SAM L21 family, delivering 48 MHz CPU performance with 128 KB of Flash and 16 KB of SRAM in a 48-pin TQFP (7x7 mm) package. The device integrates a sophisticated power management architecture with under 35 µA/MHz active current consumption and a deep Sleep mode current of just 200 nA, enabling years of battery operation on a single coin cell. Functional Safety (FuSa) features are integrated to support IEC 60730 Class B compliance in household appliances and similar safety-critical applications. A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory (Flash), working memory (RAM), and a rich set of peripherals on a single chip. The Cortex-M0+ core is the most energy-efficient member of the ARM Cortex-M family and targets 8/16-bit migration designs where ultra-low power and deterministic interrupt response are critical. The SAM L21 extends this with Microchip's proprietary picoPower technology, event system, and SleepWalking peripherals that allow automated peripheral interaction without waking the CPU. Key features include 128 KB Flash (128K x 8), 16 KB SRAM, an 8-channel event system, up to 5 SERCOM serial communication peripherals (each reconfigurable as UART/SPI/I2C), a 12-bit 1 MSPS ADC, two analog amplifiers, two 24-bit timers, and a Real-Time Clock (RTC) with calendar and alarm. The device operates across 1.62 V to 3.63 V supply range, supports SleepWalking, has multiple low-power modes (Idle, Standby, Backup, Off), and provides a peripheral touch controller as well as a USB 2.0 Full-Speed device interface. Architecturally, the SAM L21 uses a Harvard bus architecture with separate AHB and APB bridges, providing deterministic memory access. The integrated voltage regulator supports core voltages down to 1.2 V with on-the-fly voltage scaling, enabling fine-grained power budgeting. The Peripheral Event System allows direct hardware-triggered communication between peripherals, offloading work from the CPU and supporting SleepWalking where peripherals can react to events without CPU intervention, achieving nA-range standby currents. Typical applications include battery-powered IoT sensor nodes, wearable health and fitness devices, smart home and HVAC remote controls, industrial wireless sensor networks, energy-harvesting endpoints, and consumer electronics requiring long battery life. The functional safety features make it particularly well-suited for white goods, fire and security alarm systems, and other IEC 60730-compliant appliances. When designing with this device, pay careful attention to the decoupling network (at minimum 100 nF X7R on each VDD pin plus a 4.7 µF bulk), use the on-board voltage regulator with the recommended inductor and capacitor combination for the DC-DC switch-mode power supply, and consult the errata sheet for revision-specific workarounds. Proper SleepWalking configuration can reduce average current by an order of magnitude in interrupt-driven applications. This page consolidates distributor pricing, drop-in pin-compatible alternatives within the SAM L21 family, and practical design notes not found in the manufacturer datasheet, helping engineers select the right variant and shorten their design cycle.

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ATSAML21G17B-MNT - 48MHz ARM Cortex-M0+ MCU, 128KB Flash | Microchip
ATSAML21G17B-MNT

ATSAML21G17B-MNT - 48MHz ARM Cortex-M0+ MCU, 128KB Flash | Microchip

The Microchip Technology ATSAML21G17B-MNT is a 32-bit ARM Cortex-M0+ ultra-low-power microcontroller from the SAM L21 family, featuring Functional Safety (FuSa) capability and housed in a 48-pin QFN (7x7 mm) package. Key headline parameters include 48 MHz CPU clock, 128 KB Flash program memory, 16 KB SRAM, and a 1.6V to 3.6V supply voltage range, with industrial -40C to +85C operating temperature. The -MNT suffix indicates QFN48 package, 85C grade, and Tape & Reel packaging. What is a low-power ARM Cortex-M0+ microcontroller? An ARM Cortex-M0+ MCU is a 32-bit reduced instruction set computing (RISC) microcontroller built around the ARM Cortex-M0+ processor core, the smallest and most energy-efficient core in the Cortex-M family. In the taxonomy hierarchy, the ATSAML21G17B-MNT is a microcontroller (MCU) -> ARM Cortex-M0+ MCU -> low-power MCU -> embedded microcontroller -> semiconductor IC. These ultra-low-power MCUs target battery-operated and energy-harvesting designs where active current under 35 uA/MHz and sleep current of 200 nA dramatically extend battery life. The ATSAML21G17B-MNT delivers 35 uA/MHz active power consumption and 200 nA Sleep mode current per the Microchip SAM L21 family datasheet. It integrates FuSa (Functional Safety) features suitable for IEC 60730 Class B compliance in home appliances and industrial safety applications, and includes the standard SAM L21 peripheral set: SERCOM, ADC, DAC, timers, and RTC. The 48-QFN (7x7) package provides excellent thermal performance and small PCB footprint for space-constrained designs. Architecturally, the SAM L21 family uses a Cortex-M0+ core with single-cycle I/O access, hardware multiplier, and Microchip's proprietary sleepwalking peripherals that wake individual peripherals without CPU intervention. The 128 KB Flash supports in-application programming (IAP) and the integrated True Random Number Generator (TRNG) plus AES hardware accelerator provide security primitives for IoT endpoints. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart home automation, industrial wireless sensor networks, and functional-safety certified home appliances. The wide 1.6V to 3.6V supply range supports direct connection to single-cell Li-ion, 3V coin cells, and 3.3V regulated rails. When designing with this MCU, ensure the QFN48 thermal pad is soldered to a sufficient copper pour for heat dissipation. For FuSa applications, follow Microchip's Class B firmware library and verify all safety diagnostic tests pass under worst-case operating conditions. This page synthesizes distributor pricing, drop-in SAM L21 family alternatives, and practical low-power design guidance not aggregated on a single manufacturer datasheet page.

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ATSAML21G17B-MUT - 128KB Flash Cortex-M0+ MCU | Microchip
ATSAML21G17B-MUT

ATSAML21G17B-MUT - 128KB Flash Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAML21G17B-MUT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21 family with 128KB Flash and 16KB SRAM, housed in a 48-pin QFN (7x7 mm) package. It operates at up to 48 MHz core frequency, delivers 2.46 CoreMark/MHz, and integrates a Functional Safety (FuSa) feature set aimed at safety-critical embedded systems. An ultra-low-power microcontroller (MCU) is a microprocessor optimized for energy-constrained applications such as battery-powered IoT nodes, wearables, and wireless sensor platforms. The ARM Cortex-M0+ core used here belongs to the ARM Cortex-M family, a 32-bit RISC architecture targeted at deeply embedded microcontrollers. The SAM L21 family extends the Cortex-M0+ line with Microchip's proprietary power-management technology, positioning the part above general-purpose Cortex-M0+ MCUs in active-mode efficiency and far below them in sleep-mode current. Key features of the ATSAML21G17B-MUT include <35 uA/MHz active current, 200 nA sleep-mode current, integrated SERCOM peripherals, a 12-bit ADC, and a hardware crypto block supporting AES and SHA. Functional Safety mechanisms include lockstep-friendly core, BOD, and parity-checked SRAM that simplify IEC 60730 / Class B safety firmware certification. The 48-QFN package exposes up to 36 GPIO and supports 1.62V to 5.5V supply via an internal buck/boost regulator. Architecturally, the device pairs an event-driven SleepWalking peripheral controller with a configurable sleep mode controller, allowing the CPU to wake only on pre-qualified events. Compared with the SAM D20/D21 family, the SAM L21 trades raw performance headroom for radically lower sleep-mode current and integrated FuSa diagnostics, making it the recommended choice when a Cortex-M0+ part must run for years from a coin cell. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart-home edge devices, energy-harvesting wireless switches, and industrial HVAC controllers with safety diagnostics. The wide 1.62V-5.5V supply range is well-matched to single-cell Li-ion, 3.3V regulated, and 5V USB-powered rails. When designing with this part, budget the FPU-less Cortex-M0+ core for moderate DSP/Math workloads only; choose Cortex-M4F (SAM D/E families) for FFT-heavy signal chains. The QFN-48 land pattern is footprint-compatible with several SAM D20/D21 G variants, simplifying migration when more Flash is needed. This page synthesizes distributor pricing, drop-in alternatives, and SAM L21 design notes not found in the standalone datasheet.

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ATSAML21G17B-U - 48MHz Cortex-M0+ 128KB MCU | Microchip
ATSAML21G17B-U

ATSAML21G17B-U - 48MHz Cortex-M0+ 128KB MCU | Microchip

The Microchip ATSAML21G17B-U is an ultra-low-power ARM Cortex-M0+ microcontroller from the SAM L21G family with 128KB Flash and 16KB SRAM in a 48-pin WLCSP package, operating up to 48MHz. Built on sophisticated power management technology, it consumes under 35µA/MHz in active mode and only 200nA in Sleep mode, making it one of the most energy-efficient Cortex-M0+ MCUs available. What is an ultra-low-power microcontroller? An ultra-low-power MCU (ULP MCU) is a microcontroller designed specifically to minimize energy consumption across all operating states (active, sleep, deep-sleep, backup), enabling battery-powered products to operate for years on a single cell. ULPs combine low-leakage process technology, multi-domain power gating, and multiple low-power sleep modes; they sit within the broader category of embedded microcontrollers and are the heart of IoT, wearable, and energy-harvesting systems. Key features include 128KB Flash, 16KB SRAM, a Cortex-M0+ core with single-cycle multiplier, full-speed USB 2.0 device, and a rich peripheral set: SERCOM (configurable serial communication), 12-bit ADC, DAC, comparators, and PTC (Peripheral Touch Controller). Functional Safety (FuSa) features and a wide 1.62V-3.6V operating voltage range support industrial-grade applications. The SAM L21 architecture integrates an advanced power management unit (PMU) with multiple sleep modes (Sleep, Deep-Sleep, Backup, Off) and on-chip voltage regulators that power only the required logic domains. This fine-grained power gating, combined with Event System hardware interconnects, allows the CPU to stay in deep sleep while peripherals continue operating autonomously. Typical applications include IoT sensor nodes, wearable fitness bands, smart home devices, secure element companion MCUs, battery-powered medical monitors, and industrial wireless sensors. The integrated USB 2.0 full-speed device also makes it suitable for human-interface devices (HID) such as wireless presenters and BLE/LoRa sensor dongles. When designing with this MCU, ensure the supply decoupling follows the SAM L21 reference design: place 100nF X7R ceramic capacitors adjacent to each VDDCORE/VDDIO pin pair. The Backup domain requires a coin-cell or super-capacitor if RTC retention is needed during main power loss. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with the verified snapshot as of 2026-10-07.

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ATSAML21G18B-ANT - 256KB Flash 48MHz Cortex-M0+ MCU | Microchip
ATSAML21G18B-ANT

ATSAML21G18B-ANT - 256KB Flash 48MHz Cortex-M0+ MCU | Microchip

The Microchip Technology ATSAML21G18B-ANT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21G family, featuring 256KB Flash, 32KB SRAM, and operating at up to 48 MHz, housed in a 48-pin TQFP (7x7 mm) package with operating temperature range of -40C to +85C. It supports a wide supply voltage range of 1.6V to 3.6V and consumes under 35 uA/MHz in active mode and only 200 nA in Sleep mode, making it ideal for battery-powered IoT edge nodes. An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed by ARM Holdings for embedded applications that require low power consumption, deterministic interrupt response, and a rich peripheral set. The Cortex-M0+ belongs to the broader ARM Cortex-M family of microcontrollers and integrates features such as single-cycle I/O port access, a low-latency interrupt controller (NVIC), and optional single-cycle hardware multiply. Within the system hierarchy, a microcontroller (MCU) sits inside the Integrated Circuits category, with microcontrollers being a subset of microprocessors specifically designed for standalone embedded control. The SAM L21 family extends this architecture with Microchip's proprietary ultra-low-power technology, including multiple Sleep modes, a power-on reset (POR) and brown-out detector (BOD), and on-chip peripherals that can operate while the CPU is asleep. Key features of the ATSAML21G18B include the Full-Speed USB 2.0 device and embedded host controller, a 12-bit 1 MSPS ADC, multiple SERCOM (serial communication) interfaces configurable as UART/SPI/I2C, a 32-bit RTC with calendar, and a Cryptographic Engine (CSE) supporting AES-128 and AES-256. The functional safety (FuSa) variant adds hardware diagnostic features. The peripheral touch controller (PTC) supports up to 256 channels for capacitive touch sensing without external components. At the architectural level, the SAM L21 integrates the Cortex-M0+ core with a high-speed bus matrix and a separate low-power peripheral bus, allowing DMA transfers to occur while the CPU sleeps. The Event System (EVSYS) enables peripherals to trigger each other without CPU intervention, further reducing active-mode energy consumption. The device is fabricated on a low-leakage CMOS process and supports SleepWalking, where peripherals wake the CPU only when data is ready. Typical applications include wearable fitness and health devices, smart home sensor nodes, low-power wireless IoT endpoints, industrial metering, battery-powered data loggers, and human-machine interfaces (HMI) with touch input. The wide operating voltage and ultra-low Sleep current also suit energy-harvesting designs where the average current must remain below 10 uA. Design consideration: when migrating firmware from the SAM D21 family (Cortex-M0+ at higher active current), use the SAM L21 Sleep modes aggressively - placing the CPU in Sleep between ADC samples can reduce average current by 50x or more. Use the brown-out detector (BOD) at 1.6V minimum and ensure decoupling capacitors (100 nF plus 4.7 uF bulk) are placed within 2 mm of the VDD pin. This page synthesizes distributor pricing, package-compatible alternatives, application circuits, and design notes that are not consolidated in the SAM L21 family datasheet, giving embedded engineers a single reference for part selection, supply-chain resilience, and low-power firmware design.

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ATSAML21G18B-MNT - ARM Cortex-M0+ MCU 256KB Flash 48MHz | Microchip
ATSAML21G18B-MNT

ATSAML21G18B-MNT - ARM Cortex-M0+ MCU 256KB Flash 48MHz | Microchip

The Microchip Technology ATSAML21G18B-MNT is an ARM Cortex-M0+ based ultra-low-power 32-bit microcontroller from the SAM L21 family, featuring 256KB of Flash, 40KB of SRAM, and a 48MHz maximum CPU clock, housed in a 48-pin QFN (7x7 mm) package. According to Microchip's SAM L21 Family datasheet, this Functional Safety (FuSa) variant is engineered for safety-critical applications and offers industry-leading power efficiency of under 35 uA/MHz in active mode and only 200 nA in Sleep mode. An ARM Cortex-M0+ microcontroller is a low-power 32-bit processor core designed for embedded systems that require deterministic real-time performance, low energy consumption, and a rich peripheral set at minimal cost. The Cortex-M0+ sits within the broader hierarchy of microcontroller -> embedded MCU -> system-on-chip (SoC) -> semiconductor, and the SAM L21 family specifically targets battery-powered and energy-harvesting applications where every microamp counts. Key features include six 16-bit timer/counters, a DMA controller for offloading CPU tasks, a 12-bit ADC with up to 20 channels, multiple SERCOM (SERial COMmunication) interfaces that can each be configured as UART, SPI, or I2C, and an on-chip temperature sensor. The integrated Serial Communication Interface (SERCOM) peripheral gives designers up to six independent configurable serial channels, a major architectural advantage over fixed-function UART/SPI/I2C peripherals. Technically, the SAM L21 implements Microchip's proprietary picoPower technology with multiple power domains, a Sleepwalking peripheral event system, and a backup domain that retains 32KB SRAM and the RTC while consuming roughly 200 nA. The device supports 1.6V to 3.6V supply operation, allowing direct connection to single-cell Li-ion or two AA cells. TrustZone-like memory protection and a deterministic interrupt controller (NVIC) make it suitable for IEC 61508 SIL2-capable functional safety systems. Typical applications include wearable fitness bands, smart sensor nodes, industrial IoT edge devices, battery-powered medical sensors, low-power wireless sensor networks, and safety-critical motor control. The combination of Cortex-M0+ compute performance and sub-200nA sleep current makes the ATSAML21G18B-MNT particularly strong in always-on edge nodes. When designing with this MCU, prioritize short wake-up routines and use Sleepwalking to keep the CPU off while peripherals monitor events. Plan PCB layout so that decoupling capacitors sit within 3 mm of VDD pins and the QFN exposed pad is soldered to a continuous ground plane for thermal dissipation. This page combines manufacturer datasheet specifications, current distributor pricing, drop-in alternatives within the SAM L21 family, and practical design notes not consolidated elsewhere, providing engineers with a single reference for component selection.

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ATSAML21J16B-AUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
ATSAML21J16B-AUT

ATSAML21J16B-AUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip

The Microchip Technology ATSAML21J16B-AUT is a 32-bit ARM Cortex-M0+ ultra-low-power microcontroller from the SAM L21 family, featuring 64KB Flash and 8KB SRAM in a 64-pin TQFP (10x10 mm) package operating at up to 48MHz. The part belongs to the SAM L21J series, which targets energy-constrained battery-powered designs consuming under 35 µA/MHz in active mode and only 200nA in Sleep mode per the Microchip product page. The "AUT" suffix denotes TQFP64 package, tape-and-reel packaging, and the -40°C to +85°C industrial operating range. A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, data RAM, and peripherals on a single silicon die. The ARM Cortex-M0+ is the smallest and most energy-efficient ARM processor core, optimized for deterministic embedded control with a minimal instruction set, while the SAM L21 family extends this with sophisticated power-domain gating. Within the broader hierarchy, this part sits at MCU -> 32-bit MCU -> Cortex-M0+ MCU -> Ultra-Low-Power MCU -> Power Management Aware MCU. Key features include the Cortex-M0+ core at 48MHz delivering 2.46 CoreMark/MHz, 64KB embedded Flash, 8KB SRAM, and an integrated full-speed USB 2.0 device with on-chip transceiver. The device also integrates a 12-bit 1MSPS ADC, multiple SERCOM peripherals configurable as UART/SPI/I2C, a 32-bit RTC, and a segmented LCD controller with up to 8x32 segments. The wide 1.62V to 3.63V supply range and on-chip DC-DC buck converter enable direct battery operation from a single 1.5V cell when boosted, or from a 3V coin cell. Typical applications include wearable fitness bands, medical sensor patches, smart remote controls, IoT sensor nodes, battery-powered metering, and human-machine interface panels with LCD readouts. The integrated LCD controller makes the SAM L21 especially attractive for industrial gauges and consumer devices that need a low-power alphanumeric or segment display alongside processing. When designing with this MCU, place a 1µF decoupling capacitor on each VDD pin and keep the 32.768kHz crystal traces short to minimize sleep-mode current. Use the SAM L21 sleepwalking peripheral to wake the CPU only on sensor thresholds, which is the key to achieving the 200nA sleep figure. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAML21J16B-MUT - 48MHz Cortex-M0+ 64KB Flash MCU | Microchip
ATSAML21J16B-MUT

ATSAML21J16B-MUT - 48MHz Cortex-M0+ 64KB Flash MCU | Microchip

The Microchip ATSAML21J16B-MUT is an ultra-low-power ARM Cortex-M0+ microcontroller in the SAM L21 family, operating at up to 48 MHz with 64 KB of Flash and 8 KB of SRAM in a 64-pin QFN (9x9 mm) package. It features an active-mode current under 35 uA/MHz and a Sleep-mode current of 200 nA, making it one of the lowest-power 32-bit Cortex-M0+ MCUs in its class. The device integrates sophisticated power-management technologies for battery-driven and energy-harvesting applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and programmable peripherals on one die. The Cortex-M0+ is an ARM 32-bit core optimized for minimum silicon area and energy consumption, while Thumb-2 instruction set compatibility gives it the code density of larger cores. The SAM L21 family extends this ultra-low-power positioning by adding Sleepwalking peripherals (SERCOM, ADC, PTC) that wake the CPU only on meaningful events, and by providing multiple low-power domains controlled via the Power Manager (PM) and Supply Controller (SUPC) blocks. Key features of the ATSAML21J16B-MUT include 64 KB Flash, 8 KB SRAM, up to 48 MHz operation (2.46 CoreMark/MHz), a 12-bit 1 Msps ADC, a 10-bit 350 ksps DAC, up to six SERCOM serial interfaces (configurable as I2C/SPI/UART/USART), a 64-pin QFN package with high pin count for I/O expansion, and integrated PTC touch-overlays support. The device also includes a full-speed USB 2.0 device/host interface in select package options and a flexible Event System for hardware-triggered peripheral interactions. Architecturally, the ATSAML21J16B-MUT separates logic into three power domains: Backup, Voltage Regulator, and Core. Each domain can be independently switched off by the SUPC, allowing the chip to enter BACKUP mode drawing only a few hundred nanoamps while preserving the RTC and selected I/O wake events. SERCOM modules can be runtime-reconfigured to any of UART, SPI, or I2C, simplifying BOM reuse across product variants. Typical applications include IoT sensor nodes, wearable health and fitness devices, smart-home and building-automation end nodes, low-power wireless-connected products (when paired with an external sub-GHz or BLE transceiver), battery-backed industrial data loggers, and human-machine interface (HMI) panels using capacitive touch. When designing with this device, plan the sleep/wake architecture first: route wake-up sources through the Event System to avoid CPU wake-ups on every interrupt. Use the integrated DC-DC converter (L21 has switched-mode regulation) when VDD > 1.8 V to maximize efficiency. This page synthesizes distributor pricing, same-family drop-in alternatives, application notes, and design considerations not found on the manufacturer datasheet alone, optimized for engineers selecting low-power Cortex-M0+ silicon for battery and energy-harvesting products.

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ATSAML21J17B-AUT - 48MHz ARM Cortex-M0+ MCU 128KB | Microchip
ATSAML21J17B-AUT

ATSAML21J17B-AUT - 48MHz ARM Cortex-M0+ MCU 128KB | Microchip

The Microchip Technology ATSAML21J17B-AUT is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller from the SAM L21 family, featuring 128KB of Flash and 16KB of SRAM in a 64-pin TQFP (10x10 mm) package. It operates at up to 48 MHz (2.46 CoreMark/MHz) across a 1.62V-3.6V supply range and is specified for the -40C to +85C industrial temperature range. This variant ships in Tape & Reel packaging. An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core optimized for energy-efficient embedded applications, sitting within the broader hierarchy of microcontroller -> embedded MCU -> semiconductor IC. The Cortex-M0+ is the smallest and most power-efficient of the ARM Cortex-M family, featuring a single-cycle I/O port, hardware single-cycle multiplication, and a tightly-coupled NVIC for deterministic interrupt response. The SAM L21 family extends this efficiency with proprietary picoPower technology that enables Sleep mode currents below 1 uA. Key features include under 35 uA/MHz active current consumption and 200 nA Sleep mode current (per Microchip family documentation), up to six SERCOM interfaces for UART/SPI/I2C, a 12-bit 1 Msps ADC, a 10-bit DAC, and full Functional Safety (FuSa) support for safety-critical applications. The device integrates a hardware segmented LCD controller with up to 8x32 segments, a USB 2.0 Full-Speed device interface, and a capacitive touch acquisition module (PTC). The architecture pairs the Cortex-M0+ core with a 2-layer AHB-Lite bus matrix, event system for peripheral-to-peripheral signaling without CPU intervention, and SleepWalking peripherals that wake the CPU only on qualified events. This combination enables always-on battery-powered designs that previously required an external ultra-low-power MCU. The integrated DC-DC buck converter and multiple low-power regulator modes further reduce system current at 1.8V VDDIO operation. Typical applications include battery-powered IoT sensor nodes, wearable health monitoring devices, smart meters, and home automation controllers. The functional safety features make it suitable for medical device peripherals and industrial sensor interfaces requiring IEC 61508 SIL 2 compliance. The wide operating voltage and low Sleep current also support energy-harvesting designs. When designing with this device, route the SWD pins (SWCLK/SWDIO) to a dedicated debug header or test pad cluster for production programming. Decouple VDDIN with a 1 uF X7R 0402 ceramic capacitor placed within 3 mm of the pin, and follow the Microchip SAM L21 hardware design checklist for the DC-DC inductor selection. This page synthesizes distributor pricing, drop-in alternatives within the SAM L21 family, and practical design notes not found in the manufacturer datasheet alone.

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