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ATSAM4LC4BA-AUR - 48MHz Cortex-M4 256KB Flash MCU | Microchip
ATSAM4LC4BA-AUR

ATSAM4LC4BA-AUR - 48MHz Cortex-M4 256KB Flash MCU | Microchip

The Microchip Technology ATSAM4LC4BA-AUR is a 32-bit ARM Cortex-M4 microcontroller running at 48 MHz with 256KB (256K x 8) Flash memory and 32KB SRAM, housed in a 64-pin TQFP (10x10 mm) surface-mount package with exposed pad. A microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, memory, and peripherals onto one silicon die, forming the lowest tier of the embedded processing hierarchy: MCU -> embedded processor -> system-on-chip. The SAM4L family belongs to the 32-bit ARM Cortex-M class of microcontrollers, which are widely used where deterministic real-time response, low power, and rich analog integration are required. Key features of the ATSAM4LC4BA-AUR include hardware cryptography, an ultra-low-power design with multiple sleep modes, operation from 1.8V, 2.5V, or 3.3V supplies, and an industrial temperature range of -40C to +85C. The Cortex-M4 core supports DSP instructions, and the device integrates a flexible event system that allows peripherals to interact without CPU intervention, dramatically reducing active-mode energy. Technically, the SAM4L achieves industry-leading energy efficiency through a multi-layer power architecture: separate voltage regulators, peripheral clock gating, and a wait-mode that resumes execution in microseconds. The integrated AES, DES, and SHA hardware accelerators offload cryptographic workloads from the CPU, important for secure IoT nodes. Typical applications include industrial control and automation nodes, consumer appliances, metering, and battery-powered sensor systems that demand long battery life combined with secure communications. When designing with this part, note that the exposed pad on the 64-TQFP must be soldered to a ground plane for optimal thermal and signal-integrity performance, and the 1.8V/2.5V/3.3V supply options allow direct battery or Li-Ion operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC4BA-MU - 48MHz Cortex-M4 MCU, 256KB Flash | Microchip
ATSAM4LC4BA-MU

ATSAM4LC4BA-MU - 48MHz Cortex-M4 MCU, 256KB Flash | Microchip

The Microchip Technology ATSAM4LC4BA-MU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 256KB (256K x 8) of embedded Flash memory, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single silicon die, forming the heart of an embedded system. The SAM4L family sits within Microchip's (formerly Atmel) SAM ARM-based MCU portfolio, which spans Cortex-M0+, Cortex-M4, and higher tiers of the ARM processor hierarchy for low-power embedded applications. The defining feature of the ATSAM4LC4B is its class-leading power efficiency: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us, which Microchip states are the lowest power and shortest wake-up figures in any Cortex-M4-based flash microcontroller. This makes the device well suited to battery-powered designs where the MCU spends most of its life asleep. Architecture-wise, the Cortex-M4 core provides single-cycle DSP instructions and hardware FLOPS-free fixed-point math, paired with the SAM4L's peripheral event system that allows peripherals to interact without CPU intervention, further reducing active current. Mouser listings also flag an integrated CRYPTO engine, indicating hardware acceleration for AES-class cryptographic operations. Typical applications include battery-powered industrial sensors, low-power data loggers, portable medical devices, and secure connected nodes requiring the on-chip crypto engine. Design consideration: as a 3.3V CMOS device in a no-lead QFN-EP package, the exposed pad must be soldered to a ground plane for both thermal dissipation and signal integrity; verify the industrial temperature rating against your enclosure environment. This page synthesizes verified distributor data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4LC4BA-UUR - Cortex-M4 120MHz 256KB WLCSP-64 | Microchip
ATSAM4LC4BA-UUR

ATSAM4LC4BA-UUR - Cortex-M4 120MHz 256KB WLCSP-64 | Microchip

The Microchip Technology ATSAM4LC4BA-UUR is a 32-bit ARM Cortex-M4 flash microcontroller with 256KB embedded flash and 32KB SRAM, operating at up to 48MHz core frequency from a 1.62V to 3.6V supply, housed in a 64-ball WLCSP (VFBGA) wafer-level package on tape and reel. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals into one package, sitting within the broader hierarchy of semiconductor devices under embedded processors and system-on-chip families. The ATSAM4LC4BA-UUR belongs to the SAM4L family, Microchip's (formerly Atmel's) ultra-low-power Cortex-M4 MCU line, targeted at battery-powered and energy-harvesting systems where every microamp matters. The headline feature of the SAM4L family is class-leading energy efficiency: 90 uA/MHz active-mode current, 1.5 uA in sleep mode, and wake-up times down to 1.5 us, figures cited by Microchip as the lowest power and shortest wake-up in any Cortex-M4-based device. Beyond raw power figures, the device integrates an LCD controller with up to 8x40 segment driving capability, hardware cryptography accelerators (AES, DES, Triple-DES, RSA, SHA, ECC via a dedicated crypto engine), a USB host/device controller, DMA with peripheral event system, and multiple serial interfaces (USART, SPI, TWI/I2C). Architecturally, the Cortex-M4 core includes DSP instructions and single-cycle multiply-accumulate, enabling efficient signal processing. Microchip's peripheral event system allows peripherals to communicate without CPU intervention, dramatically reducing active duty cycle in sensor applications. A flexible power controller with multiple sleep modes, plus a built-in buck converter in some SAM4L power configurations, further extends battery life in wearables and metering products. Typical applications include battery-powered metering, portable medical and wellness devices, smart sensors, industrial IoT nodes, and consumer electronics with segment LCD displays, where the combination of 256KB flash, LCD control, and cryptographic security in a compact 64-ball WLCSP footprint is a decisive fit. A key design consideration is the WLCSP package itself: ball-grid soldering requires reflow processes and careful PCB land-pattern design, and the fine 0.4-0.5mm ball pitch demands attention to trace routing and underfill decisions; verify the exact ball map in the manufacturer datasheet before layout. This page synthesizes distributor availability, drop-in family alternatives, practical design notes, and application guidance not found together in the manufacturer datasheet.

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ATSAM4LC4CA-AU - 48MHz Cortex-M4 256KB Flash MCU | Microchip
ATSAM4LC4CA-AU

ATSAM4LC4CA-AU - 48MHz Cortex-M4 256KB Flash MCU | Microchip

The Microchip Technology ATSAM4LC4CA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz, with 256 KB (256K x 8) of embedded flash and 32 KB (32K x 8) of SRAM, housed in a 100-pin TQFP (14 x 14 mm) surface-mount package. It integrates an AES cryptographic engine, 10-bit and 12-bit ADCs, and is qualified for industrial temperature ranges. A microcontroller is a single-chip computer that combines a processor core, memory, and peripherals such as ADCs, timers, and communication interfaces on one die. Within the embedded hierarchy, the ATSAM4LC4CA-AU belongs to the SAM4L family of ARM Cortex-M4-based MCUs, which sits in the broader categories of 32-bit microcontrollers and embedded processors used across power management, sensor processing, and human-interface applications. The defining feature of this part is ultra-low power consumption: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us, which Microchip states are the lowest figures for a Cortex-M4-based flash MCU in its class. This makes it well suited for battery-powered designs where CPU performance and energy budget must coexist. Technically, the Cortex-M4 core provides DSP instructions and single-cycle MAC operations, enabling efficient digital filtering and sensor fusion. The integrated crypto accelerator offloads AES encryption from software. The supply range of 1.62 V to 3.6 V (nominal 1.8 V / 3.3 V operation) supports direct battery connection, and the green/RoHS-compliant TQFP package is moisture-sensitivity level managed for standard reflow assembly. Typical applications include battery-powered IoT sensor nodes, industrial control panels, low-power data loggers, and portable medical instruments, where the 256 KB flash accommodates protocol stacks and the 48 MHz core handles real-time processing. A key design consideration is power architecture: exploit the SAM4L sleep modes and fast wake-up by sleeping between events, since wake-up overhead is only microseconds. Avoid holding peripherals clocked during idle periods to preserve the 1.5 uA sleep figure. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing information gain for sourcing and selection decisions. Pricing shown reflects LCSC data from $9.2918 as of 2026-09-20.

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ATSAM4LC4CA-AUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4LC4CA-AUR

ATSAM4LC4CA-AUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4LC4CA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 256 KB of Flash memory, housed in a 100-pin TQFP (14x14 mm) package. It operates from a 1.62V to 3.6V supply and delivers class-leading low-power figures of 90 uA/MHz in active mode and 1.5 uA in sleep mode with wake-up times down to 1.5 us. A microcontroller unit (MCU) is a single-chip computer integrating a processor core, memory, and peripherals on one die. The ATSAM4LC4CA belongs to the SAM4L family, which sits within the ARM Cortex-M class of 32-bit MCUs - the dominant architecture for embedded, low-power, and IoT designs. MCUs of this type replace multi-chip solutions, reducing board area, bill-of-materials cost, and system power consumption. Key differentiating features include the Cortex-M4 core with DSP instructions, a hardware AES/DES cryptographic engine for secure applications, and the ultra-low-power peripheral event system that lets peripherals communicate without CPU intervention. The SAM4L power architecture supports multiple sleep modes with the Backup mode consuming the least, and programmable features such as a built-in buck converter on certain family members improve energy efficiency in battery-powered designs. The SAM4L architecture pairs the 48 MHz Cortex-M4 with a multi-layer bus matrix and DMA controller, sustaining high peripheral throughput while the CPU sleeps. Flash memory with ECC protects against bit errors, and a rich peripheral set - USART, SPI, I2C (TWI), USB, ADC, DAC, PWM timers, and capacitive touch support (Peripheral Touch Controller) - enables single-chip designs for HMI, metering, and connectivity nodes. The PIC-style flexibility of clock sources (RCSYS, OSC0, DFLL, PLLs) allows dynamic frequency scaling to trade performance against current draw. Typical applications include battery-powered sensor nodes, industrial control panels, consumer appliances, smart metering front ends, and touch-enabled user interfaces. The industrial temperature range of -40C to +85C and cryptographic acceleration suit metering and secure IoT endpoints, while low sleep current suits energy-harvesting and coin-cell products. When designing with the ATSAM4LC4CA-AUR, budget the 100-TQFP thermal and decoupling requirements carefully: place 0.1 uF ceramic capacitors at every VDD/VDDIO pin pair and use solid ground planes. The R suffix indicates tape-and-reel packaging for automated assembly. This page synthesizes distributor pricing from ten sources, drop-in SAM4L-family alternatives, pinout guidance, and design notes not found in the manufacturer datasheet alone.

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ATSAM4LC8AA-MU - 48MHz Cortex-M4, 512KB Flash MCU | Microchip
ATSAM4LC8AA-MU

ATSAM4LC8AA-MU - 48MHz Cortex-M4, 512KB Flash MCU | Microchip

The Microchip (Atmel) ATSAM4LC8AA-MU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 512KB (512K x 8) FLASH program memory and 64KB SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It is a member of the SAM4L family, which Microchip positions as the lowest-power Cortex-M4-based MCU line, delivering 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, program memory, data memory, and peripherals on one die, forming the lowest tier of the embedded processing hierarchy (MCU -> embedded processor -> application processor -> SoC). The ATSAM4LC8AA-MU belongs to the ARM Cortex-M4 class of 32-bit MCUs, which combine a RISC processor with digital signal processing instructions for embedded control applications. Key features include the Cortex-M4 core with DSP extensions, 512KB of on-chip flash with a flash accelerator for zero-wait-state execution at 48 MHz, and an ultra-low-power design targeting battery-operated and energy-harvesting systems. Connectivity peripherals cover I2C, IrDA, LINbus, SPI, UART/USART, and USB, allowing direct interfacing with sensors, displays, and host systems. Supply voltage spans 1.62V to 3.6V per the SAM4L family specification range (1.8V/2V/2.3V/3.3V nominal operating points). Architecturally, the SAM4L series uses the high-performance 32-bit ARM Cortex-M4 RISC processor and integrates a flexible event system, multiple low-power sleep modes, and peripheral gating that allows the core to remain in deep sleep while peripherals operate. This reduces average system power in duty-cycled applications such as metering and portable instrumentation. Typical applications include battery-powered portable instruments, low-power industrial sensors, USB-connected field devices, building automation nodes, and consumer products where long battery life and fast wake-up from deep sleep are decisive. The 48-QFN footprint suits compact, two-layer and four-layer boards with fine-pitch surface-mount assembly. For design, budget sleep-current paths carefully: unused GPIOs should be defined rather than floating, and the exposed thermal/electrical pad must be soldered to a grounded copper pour for reliable ground return and thermal performance. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-09-20.

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ATSAM4LC8AA-MUR - 48MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4LC8AA-MUR

ATSAM4LC8AA-MUR - 48MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4LC8AA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 512 KB of Flash memory and 64 KB of SRAM, housed in a 48-pin VQFN (7x7 mm) package with exposed pad. Supplied on Tape & Reel for automated assembly, it is industrial temperature graded (-40C to +85C) and includes an integrated AES cryptographic engine. A microcontroller (MCU) is a single-chip embedded computer combining a processor core, memory, and peripherals on one die. Within the embedded hierarchy, the ATSAM4LC8AA-MUR sits in the high-performance, ultra-low-power tier of Microchip's SAM4L family: ARM Cortex-M4 core, flash-based program memory, and rich analog and digital peripherals targeted at battery-powered and energy-harvesting systems. Key differentiating features include the lowest active-mode consumption in its class at approximately 90 uA/MHz, deep sleep modes down to 1.5 uA, and wake-up times as short as 1.5 us - among the fastest of any Cortex-M4-based flash MCU. Additional capabilities include an AES cryptographic accelerator for secure communication, a flexible event system allowing peripherals to interact without CPU intervention, and multiple low-power sleep modes with peripheral wake-up sources. Technically, the SAM4L series pairs the ARM Cortex-M4 RISC processor (with DSP instructions and single-cycle MAC) with Microchip's low-leakage process technology and a Power Management Controller that gates clocks and regulates core voltage dynamically. The Flash memory supports the Peripheral Event System and 12-bit ADC/DAC channels (refer to the manufacturer datasheet for channel counts), enabling sensor-dense designs that sleep for long intervals yet respond almost instantly to interrupts. Typical applications include battery-powered metering, portable medical devices, wireless sensor nodes with long sleep intervals, and consumer appliances requiring fast wake-up from deep sleep. The combination of 90 uA/MHz active current and 1.5 us wake-up makes it especially well suited to duty-cycled sensing where average current, not peak performance, determines battery life. Design consideration: battery-life modeling should weight active current per MHz against sleep current and wake-up frequency - this device favors architectures with short, frequent work bursts rather than long compute sessions. This page synthesizes distributor pricing, drop-in alternatives within the SAM4L family, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM4LC8BA-AU - 48MHz Cortex-M4 MCU | Microchip Technology
ATSAM4LC8BA-AU

ATSAM4LC8BA-AU - 48MHz Cortex-M4 MCU | Microchip Technology

The Microchip Technology ATSAM4LC8BA-AU is a 32-bit ARM Cortex-M4 flash microcontroller rated up to 48 MHz, with 512 KB of flash memory and a 64-pin LQFP package. It belongs to the SAM4L family of low-power embedded processors and is designed for connected, sensor-driven, industrial, and low-energy control systems. The device supports operating voltage choices of 1.8 V, 2 V, 2.3 V, and 3.3 V, allowing integration with low-voltage sensors, transceivers, and mixed-signal peripherals. A flash microcontroller is a semiconductor device that combines a programmable processor core, nonvolatile program memory, data memory, and peripheral interfaces on one integrated circuit. The ATSAM4LC8BA-AU specifically combines an ARM Cortex-M4 RISC processor with the SAM4L low-power architecture. This places it within the hierarchy of microcontroller, embedded processor, 32-bit RISC processor, and programmable semiconductor, while its flash storage supports field-configurable firmware and application updates. The SAM4L family emphasizes low active-mode consumption and short recovery from sleep. The documented active-mode figure is 90 uA/MHz, while sleep-mode consumption is 1.5 uA and wake-up time can reach 1.5 us. These characteristics make the ATSAM4LC8BA-AU suitable for systems that spend much of their operating cycle in a low-power state. Its 48 MHz Cortex-M4 core provides additional processing capacity for protocol handling, data acquisition, and supervisory control without changing the external processor architecture. The 512 KB flash configuration offers substantially more program space than small entry-level microcontrollers, supporting modular firmware, communication stacks, and application logic. Operating from a 64-pin LQFP package, the device provides a conventional surface-mount solution that can be inspected, assembled, and serviced with standard electronics manufacturing methods. The exact peripheral configuration, memory organization, and electrical limits should be confirmed against the manufacturer datasheet before a new PCB is released. Typical applications include battery-powered environmental monitors, industrial sensor nodes, building automation controllers, compact data loggers, wearable accessories, and embedded communication equipment. In these systems, low sleep current and rapid wake-up help limit standby energy, while the Cortex-M4 core and 512 KB flash support protocol handling and structured control firmware. The multiple supported voltage options also help designers interface the MCU with low-energy radio, sensing, and signal-conditioning circuits. A key design consideration is power-supply partitioning. The selected operating voltage must remain compatible with every external interface, and the PCB should provide low-impedance ground and decoupling paths around the device. Firmware should also use the documented low-power modes deliberately, since an active peripheral or an incorrectly configured clock tree can increase current well above the processor's sleep-mode value. This page combines the manufacturer's core device characteristics with package guidance, application-oriented engineering context, verified comparison limits, and practical design notes. It supports faster component evaluation while keeping pin-level decisions tied to the official datasheet rather than inferred from family-level descriptions.

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ATSAM4LC8BA-MU - Cortex-M4 48MHz 512KB MCU | Microchip
ATSAM4LC8BA-MU

ATSAM4LC8BA-MU - Cortex-M4 48MHz 512KB MCU | Microchip

The Microchip Technology ATSAM4LC8BA-MU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 512KB of embedded flash memory and 64KB of SRAM, housed in a 64-pin VQFN (9x9 mm) package. It belongs to the SAM4L family, which delivers the lowest power in active mode (90 uA/MHz), the lowest sleep mode consumption (1.5 uA), and the shortest wake-up time (down to 1.5 us) among Cortex-M4-based devices. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest software-controllable layer of the embedded systems hierarchy: MCU -> embedded processor -> system-on-chip -> computing system. MCUs execute dedicated control, sensing, and connectivity tasks inside a larger electronic product. Key differentiating features of the ATSAM4LC8BA include its ultra-low-power architecture with multiple sleep modes, an integrated hardware cryptographic engine (AES, DES, SHA), and a low supply voltage window around 1.8V to 3.3V. The Cortex-M4 core provides DSP instructions and single-cycle MAC for efficient signal processing. A flexible event system and low-power peripherals allow peripheral operation while the CPU sleeps, further reducing average current consumption. Architecturally, the SAM4L series combines the Cortex-M4 processor with a multi-layer bus matrix, flash with read-while-write support, and a rich peripheral set including USB, USART, SPI, I2C (TWI), ADC, DAC, and capacitive touch support via the PTC peripheral touch controller. The picoPower technology and眠 sleepwalking peripherals enable data acquisition during sleep states. Typical applications include battery-powered industrial sensors, portable medical monitoring devices, smart metering, and low-power consumer electronics, where the 1.5 uA sleep current and 1.5 us wake-up time directly extend battery life and responsiveness. For design, budget the supply at 3.3V nominal (1.62V to 3.6V operating range) and decouple each VDD pair with 100 nF ceramic capacitors placed close to the 64-QFN leads; the exposed pad must be soldered to a grounded thermal pad for reliable operation. This page synthesizes distributor pricing, drop-in family alternatives, and practical low-power design notes not consolidated in the manufacturer datasheet.

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ATSAM4LC8BA-UUR - 48MHz Cortex-M4 512KB WLCSP-64 | Microchip
ATSAM4LC8BA-UUR

ATSAM4LC8BA-UUR - 48MHz Cortex-M4 512KB WLCSP-64 | Microchip

The Microchip Technology ATSAM4LC8BA-UUR is a 32-bit flash microcontroller based on the ARM Cortex-M4 processor, delivering 512KB of flash memory and 48MHz maximum clock speed in a 64-ball WLCSP (5.27 x 5.19 mm) package. It operates from a 1.68V to 3.6V supply and is specified for industrial temperature ranges with integrated cryptographic acceleration. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals, forming the lowest level of the embedded system hierarchy: MCU -> embedded processor -> ARM Cortex-M family -> ARM architecture. The SAM4L family belongs to Microchip's (formerly Atmel) 32-bit ARM-based flash MCU portfolio, positioned for ultra-low-power applications. Key features include the lowest active-mode current in its class at 90uA/MHz, deep-sleep current of 1.5uA, and the shortest wake-up time among Cortex-M4-based devices at down to 1.5us. The integrated AES cryptographic engine supports secure data handling, and the chip provides 10-bit and 12-bit ADC options with up to 43 GPIO pins. Architecturally, the Cortex-M4 core includes DSP instructions and optional FPU capability, while the SAM4L peripheral set integrates flexible serial communication controllers, timer/counter units, and the PICOPower technology that enables aggressive power-domain gating. This lets designers switch off unused peripherals and RAM blocks, achieving near-zero standby consumption without losing fast wake-up responsiveness. Typical applications include battery-powered portable instrumentation, IoT sensor nodes, wearable and medical monitoring devices, and energy-harvesting systems where the ultra-low active current and fast wake-up directly extend battery life. A key design consideration is the WLCSP ball-grid footprint: fan-out routing under a 0.5mm-pitch ball array requires microvia PCB technology, so verify fabrication capability before committing the land pattern. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC8CA-AU - Cortex-M4 48MHz 512KB MCU | Microchip (Tape & Reel)
ATSAM4LC8CA-AU

ATSAM4LC8CA-AU - Cortex-M4 48MHz 512KB MCU | Microchip (Tape & Reel)

The Microchip ATSAM4LC8CA-AU is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 48 MHz with 512KB embedded flash and 64KB SRAM, housed in a 100-pin TQFP (14x14 mm) package. Part of the SAM4L family, it delivers industry-leading low power: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us - the shortest among Cortex-M4-based devices. A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single chip, forming the heart of embedded systems. Within the power-management hierarchy, the SAM4L sits at the ultra-low-power end of the 32-bit ARM Cortex-M segment, competing where battery life and wake-up latency dominate the design brief. Key features include hardware cryptography (AES, DES, RSA, SHA), an integrated segment LCD controller, USB 2.0 host/device with onboard transceivers, 12-bit ADC and DAC, and a flexible event system that allows peripherals to communicate without CPU intervention. The PACS, HSCIF and multiple sleep modes with dynamic clock gating let firmware trade performance against current draw in real time. Architecturally, the ATSAM4LC8C combines the Cortex-M4 with an Atmel custom bus matrix, a Multi-layer AHB, and Peripheral Event System, plus an integrated current controller (PICOUART, AST, BPM) enabling battery-backed standby. Power scaling is achieved through the Voltage Regulator controller, allowing core voltage to be reduced in low-power states. Typical applications include battery-powered metering, wearable and portable medical devices, LCD-based human-machine interfaces, security tokens with cryptographic acceleration, and industrial sensor nodes requiring fast wake-up from deep sleep. Design consideration: the device operates from 1.62V to 3.6V (1.8V/2.5V/3.3V systems) - plan decoupling per the SAM4L hardware design guide and verify wake-up sources when using the backup domain. This page synthesizes distributor pricing, drop-in SAM4L family alternatives, and low-power design guidance not found on standard datasheet pages. Pricing as of 2026-09-20.

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ATSAM4LC8CA-AUR - Cortex-M4 48MHz 512KB MCU | Microchip
ATSAM4LC8CA-AUR

ATSAM4LC8CA-AUR - Cortex-M4 48MHz 512KB MCU | Microchip

The Microchip ATSAM4LC8CA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 48 MHz with 512KB embedded flash and 64KB SRAM, housed in a 100-pin TQFP (14x14 mm) package. Part of the SAM4L family, it delivers industry-leading low power: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us - the shortest among Cortex-M4-based devices. A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single chip, forming the heart of embedded systems. Within the power-management hierarchy, the SAM4L sits at the ultra-low-power end of the 32-bit ARM Cortex-M segment, competing where battery life and wake-up latency dominate the design brief. Key features include hardware cryptography (AES, DES, RSA, SHA), an integrated segment LCD controller, USB 2.0 host/device with onboard transceivers, 12-bit ADC and DAC, and a flexible event system that allows peripherals to communicate without CPU intervention. The PACS, HSCIF and multiple sleep modes with dynamic clock gating let firmware trade performance against current draw in real time. Architecturally, the ATSAM4LC8C combines the Cortex-M4 with an Atmel custom bus matrix, a Multi-layer AHB, and Peripheral Event System, plus an integrated current controller (PICOUART, AST, BPM) enabling battery-backed standby. Power scaling is achieved through the Voltage Regulator controller, allowing core voltage to be reduced in low-power states. Typical applications include battery-powered metering, wearable and portable medical devices, LCD-based human-machine interfaces, security tokens with cryptographic acceleration, and industrial sensor nodes requiring fast wake-up from deep sleep. Design consideration: the device operates from 1.62V to 3.6V (1.8V/2.5V/3.3V systems) - plan decoupling per the SAM4L hardware design guide and verify wake-up sources when using the backup domain. This page synthesizes distributor pricing, drop-in SAM4L family alternatives, and low-power design guidance not found on standard datasheet pages. Pricing as of 2026-09-20.

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ATSAM4LC8CA-CFU - 48MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4LC8CA-CFU

ATSAM4LC8CA-CFU - 48MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4LC8CA-CFU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 512KB flash memory, 90 uA/MHz active-mode current, and 1.5 us wake-up time, housed in a 100-ball VFBGA (7x7 mm) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy (MCU -> embedded processor -> semiconductor IC). The SAM4L family belongs to Microchip's ARM-based flash MCU portfolio, pairing the 32-bit Cortex-M4 RISC core with a rich analog and digital peripheral set for low-power embedded designs. Key differentiating features include the lowest active power in its class at 90 uA/MHz, deep sleep at just 1.5 uA, and the shortest wake-up time of any Cortex-M4-based device at down to 1.5 us, making it exceptional for battery-powered applications. It integrates hardware cryptography acceleration, an LCD controller, I2S audio interface, DMA, and connectivity peripherals including I2C, SPI, UART/USART, IrDA, LIN, and USB. Architecturally, the device operates from 1.8V, 2V, 2.3V, or 3.3V supplies and is fabricated for industrial temperature operation from -40C to +85C. The Cortex-M4 core delivers efficient single-cycle DSP instructions, while the SAM4L's peripheral event system and sleepwalking peripherals allow data processing while the CPU sleeps, further reducing system energy consumption. Typical applications include battery-powered portable instruments, industrial sensor nodes, LCD-based human-machine interfaces, and secure IoT endpoints that leverage the integrated crypto engine. When designing with this device, plan the power budget around the sleep modes and wake-up latency; the VFBGA ball grid array requires controlled-impedance PCB layout and X-ray-capable inspection equipment for assembly. This page synthesizes distributor pricing, drop-in SAM4L family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-09-20.

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ATSAM4LS2AA-AU - 48MHz Cortex-M4 128KB Flash MCU | Microchip
ATSAM4LS2AA-AU

ATSAM4LS2AA-AU - 48MHz Cortex-M4 128KB Flash MCU | Microchip

The Microchip Technology ATSAM4LS2AA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48MHz with 128KB of embedded Flash and 32KB of SRAM, housed in a 48-pin TQFP surface-mount package and supplied at 3.3V. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals into one integrated circuit, sitting at the device level of the embedded systems hierarchy (semiconductor -> integrated circuit -> microcontroller -> ARM-based flash MCU). The SAM4L series belongs to Microchip's (formerly Atmel's) ARM Cortex-M family, which uses the widely supported ARMv7E-M instruction set and toolchain ecosystem. The defining strength of the ATSAM4LS2A is ultra-low power consumption: it achieves 90uA/MHz in active mode, 1.5uA in sleep mode, and the shortest wake-up time in a Cortex-M4 device at down to 1.5us, according to the Microchip product page. On-board features include a USB device controller, a peripheral event system that routes signals between peripherals without CPU intervention, and the SleepWalking capability that lets peripherals wake the CPU only when needed. Mouser lists the part as green, industrial temperature, with crypto support. Architecturally, the Cortex-M4 core provides single-cycle multiply and hardware divide with deterministic interrupt handling, well suited to real-time battery-operated firmware. The 128KB Flash accommodates application code plus over-the-air update headroom, while 32KB SRAM supports buffers for communication stacks. Typical applications include battery-powered sensor nodes, portable medical monitoring devices, utility metering, and low-power industrial end points where wake-up latency and sleep current dominate battery life calculations. Design consideration: minimize active duty cycle by exploiting SleepWalking so peripherals service events autonomously; every 1MHz of avoided active time saves roughly 90uA. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS2AA-AUR - 48MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4LS2AA-AUR

ATSAM4LS2AA-AUR - 48MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4LS2AA-AUR is a 32-bit ARM Cortex-M4 Flash microcontroller running at up to 48 MHz with 128KB (128K x 8) of embedded Flash, housed in a 48-pin TQFP (7x7 mm) package. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, memory, and peripherals on one die, sitting at the device level of the embedded systems hierarchy (MCU -> microcontroller -> embedded processor -> semiconductor). The SAM4L family belongs to the ARM Cortex-M class of 32-bit RISC MCUs, widely used in low-power embedded design. The headline feature of the ATSAM4LS2A is class-leading energy efficiency: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us, the shortest wake-up time among Cortex-M4 devices per Microchip's product page. It integrates a USB device controller, a peripheral event system allowing peripherals to interact without CPU intervention, and the SleepWalking capability that lets peripherals operate and wake the core only when needed. Hardware crypto support and MRL A status are listed by Mouser for this industrial-temperature, green TQFP part. Typical applications include battery-powered IoT sensor nodes, portable medical devices, industrial sensor interfaces, and consumer products requiring USB connectivity with long battery life. The Cortex-M4 core with DSP instructions handles signal processing locally, while the event system keeps dynamic power low. Design-wise, exploit SleepWalking and the peripheral event system to keep the CPU in sleep states; wake-up latency of 1.5 us makes aggressive duty-cycling practical even for event-driven tasks. This page adds distributor pricing comparison, drop-in alternatives, design notes, and FAQ content synthesized beyond the manufacturer datasheet.

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ATSAM4LS2AA-MU - 48MHz Cortex-M4 MCU 128KB Flash QFN-48 | Microchip
ATSAM4LS2AA-MU

ATSAM4LS2AA-MU - 48MHz Cortex-M4 MCU 128KB Flash QFN-48 | Microchip

The Microchip Technology ATSAM4LS2AA-MU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 128 KB of embedded Flash, 32 KB of SRAM, and an integrated USB device controller, housed in a 48-pin QFN (7x7 mm) package with exposed pad. A microcontroller unit (MCU) is a single-chip embedded processor that integrates a CPU core, program memory, data memory, and peripheral functions such as timers, communication interfaces, and analog blocks. The SAM4L family sits within Microchip's (formerly Atmel) 32-bit ARM-based MCU portfolio, which spans from the low-power SAM L and SAM D families up to high-performance SAM E parts with floating-point units. MCUs are the top-level building block of embedded systems, powering industrial control, consumer devices, and IoT nodes. The defining feature of the ATSAM4LS2AA-MU is class-leading power efficiency: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us, which Microchip identifies as the lowest power and fastest wake-up among Cortex-M4 devices. The SAM4L architecture adds a Peripheral Event System and SleepWalking, allowing peripherals to operate and respond autonomously while the CPU core remains in low-power sleep. Peripherals include USB device, USART, TWI (I2C), SPI, 12-bit ADC, DAC, capacitive touch support (Peripheral Touch Controller), and an AES/DES cryptographic engine on some family members. The Cortex-M4 core delivers DSP-oriented instructions for efficient digital filtering and control-loop mathematics at 48 MHz. Typical applications include battery-powered sensor nodes, portable medical instruments, low-power IoT endpoints, and touch-sensing human interface devices where sleep current and wake-up latency dominate battery life. Design consideration: the 48-QFN exposed-pad package requires a solid ground connection through the PCB thermal pad; use via stitching to the ground plane for both thermal dissipation and signal-integrity during EMI testing. This page synthesizes distributor pricing, drop-in alternatives within the SAM4L family, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS2AA-MUR - 48MHz Cortex-M4 128KB Flash MCU | Microchip
ATSAM4LS2AA-MUR

ATSAM4LS2AA-MUR - 48MHz Cortex-M4 128KB Flash MCU | Microchip

The Microchip Technology ATSAM4LS2AA-MUR is a 32-bit ARM Cortex-M4 Flash microcontroller running at 48 MHz with 128KB embedded Flash and 32KB SRAM, housed in a 48-pin QFN (7x7 mm) exposed-pad package rated for industrial temperature ranges. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals onto one die, serving as the lowest layer of the embedded-system hierarchy (MCU -> embedded processor -> system-on-chip -> computing system). The SAM4L series sits within Microchip's (formerly Atmel's) ARM-based Flash MCU portfolio, which spans the SAM3, SAM4, and SAM D/L/C families. As a Cortex-M4 class device, it combines 32-bit RISC processing with deterministic interrupt handling suited to real-time control. The defining strength of the ATSAM4LS2AA-MUR is ultra-low power: Microchip specifies 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times as short as 1.5 us, the lowest figures among Cortex-M4 Flash MCUs. Integrated peripherals include a USB device controller, a peripheral event system, and the SleepWalking feature, which lets peripherals wake the core only when a programmed event occurs, minimizing CPU active time. Architecturally, the Cortex-M4 core delivers single-cycle multiply and hardware divide with a nested vectored interrupt controller (NVIC), while the 128KB Flash supports in-system programming. The peripheral event system routes signals between peripherals without CPU intervention, and low-power techniques such as dynamic clock gating reduce consumption in duty-cycled designs. Typical applications include battery-powered sensor nodes, portable medical instruments, low-power industrial sensing, and USB-connected handheld devices where 90 uA/MHz active current and 1.5 uA sleep current directly extend battery life. Design consideration: the 48-QFN exposed pad must be soldered to a grounded PCB thermal pad for reliable grounding and heat dissipation; supply is a single 3.3V rail per the datasheet. This page synthesizes distributor pricing context, drop-in family alternatives, and low-power design notes not found in the manufacturer datasheet.

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ATSAM4LS2BA-MU - 48MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4LS2BA-MU

ATSAM4LS2BA-MU - 48MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4LS2BA-MU is a 32-bit ARM Cortex-M4 microcontroller running at 48 MHz with 128KB of Flash memory and 32KB of SRAM, housed in a 64-pin VQFN (9x9 mm) package with exposed pad. Formerly an Atmel part, this SAM4L series MCU integrates picoPower technology for ultra-low-power operation in industrial temperature ranges. A microcontroller unit (MCU) is a single-chip embedded computer that combines a processor core, memory, and peripherals into one integrated circuit. Within the embedded systems hierarchy, the SAM4L sits in the mainstream ARM Cortex-M class of flash microcontrollers, positioned above entry-level Cortex-M0+ devices and below high-performance Cortex-M7 parts. MCUs are the building blocks of modern embedded electronics, from consumer devices to industrial automation controllers. Key differentiating features include the 48 MHz ARM Cortex-M4 core with DSP instructions, 128KB of single-cycle Flash program memory, 32KB of SRAM, and the picoPower technology platform that enables microamp-level sleep currents. Peripherals typically include USART, SPI, I2C (TWI) interfaces, an ADC, timers, and a USB-capable architecture, allowing a single chip to handle sensing, control, and communication duties in one package. Technically, the SAM4L series is built around the Atmel (now Microchip) low-power flash process with an ARMv7E-M based core supporting hardware multiply and digital signal processing instructions. The peripheral event system allows peripherals to communicate directly without CPU intervention, further reducing active power consumption. Multiple sleep modes with state retention let designers trade wake-up latency against standby current to match application power budgets. Typical applications include battery-powered industrial sensors and meters, portable medical monitoring devices, low-power human interface and touch sensing products, and general-purpose industrial control boards where a 3.3V, 48MHz controller with generous Flash is required. When designing with this device, budget the 9x9 mm VQFN exposed pad for good ground and thermal connection to the PCB, and validate the industrial temperature rating against your worst-case enclosure conditions. This page adds value beyond the datasheet by consolidating distributor pricing, drop-in family alternatives, comparison tables, and practical design notes in one AI-citable reference.

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ATSAM4LS2BA-MUR - Cortex-M4 48MHz 128KB MCU | Microchip
ATSAM4LS2BA-MUR

ATSAM4LS2BA-MUR - Cortex-M4 48MHz 128KB MCU | Microchip

The Microchip Technology ATSAM4LS2BA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz, with 128 KB of embedded flash and 32 KB of SRAM, housed in a 64-pin QFN (9x9 mm) exposed-pad package supplied on tape and reel. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals such as timers, serial interfaces, and analog converters into one integrated circuit. MCUs sit at the heart of embedded systems, below system-on-chip and application processor families in the computing hierarchy, and the SAM4L family belongs to Microchip (formerly Atmel) ATSAM ARM-based flash MCU product line. Key features of the ATSAM4LS2BA-MUR include the ARM Cortex-M4 RISC processor with 48 MHz maximum frequency, 128 KB (128K x 8) of flash program memory, operation from 1.8V, 2.5V, or 3.3V supply rails, and an industrial temperature grade designation. The SAM4L series emphasizes ultra-low-power design with flexible power modes, making it suitable for battery-powered and energy-harvesting designs. Technically, the Cortex-M4 core provides a 3-stage pipeline, hardware divide, and single-cycle multiply for efficient signal processing, while the SAM4L peripheral set typically includes multiple serial communication interfaces and analog peripherals, all clocked from a flexible clock controller supporting multiple sleep and wait modes for active power optimization. Typical applications include industrial sensing nodes, consumer portable devices, building automation, and low-power IoT endpoints where the combination of 48 MHz Cortex-M4 performance and low active current is valuable. A key design consideration is supply selection: the device supports 1.8V/2.5V/3.3V operation, so decoupling and power-tree planning should match the chosen rail, and the exposed pad must be soldered to a grounded PCB land pattern for thermal and electrical performance. This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS2CA-AU - ARM Cortex-M4 MCU 48MHz 128KB | Microchip
ATSAM4LS2CA-AU

ATSAM4LS2CA-AU - ARM Cortex-M4 MCU 48MHz 128KB | Microchip

The Microchip Technology ATSAM4LS2CA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz, with 128 KB (128K x 8) of embedded flash memory, 32 KB of SRAM, and a 100-pin TQFP (14 x 14 mm) package, supplied in industrial temperature grade with hardware crypto acceleration. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy: semiconductor -> 32-bit MCU -> ARM Cortex-M microcontroller -> SAM4L series. The ATSAM4LS2CA-AU belongs to the SAM4L family originally developed by Atmel (now Microchip Technology), based on the high-performance 32-bit ARM Cortex-M4 RISC processor. Key features include the 48 MHz Cortex-M4 core with DSP instructions, 128 KB flash for code storage, 32 KB SRAM, a picoPower low-power architecture suited to battery operation, hardware cryptographic acceleration (as noted by Mouser: CRYPTO), and an industrial operating temperature range (-40C to +85C). The Green/RoHS-compliant TQFP package with gull-wing terminals supports standard surface-mount assembly. Per the Atmel/Microchip ATSAM4LS2CA datasheet, the SAM4L family integrates a rich peripheral set including USB, USART, SPI, TWI, and analog peripherals, with low-power modes controlled by the peripheral event system, allowing peripherals to operate while the CPU sleeps. Typical applications include low-power industrial sensing nodes, consumer and portable battery-powered devices, motor and lighting control, and general-purpose embedded control where 128 KB flash and a 100-pin I/O budget fit the design. Design consideration: the device operates at 3.3 V; verify supply sequencing and use proper decoupling on the VDDIO/VDDCORE domains per the datasheet power section. This page synthesizes distributor pricing, pin-compatible same-family alternatives, and practical design notes not found on a single distributor page, with data verified against DigiKey, Mouser, Octopart, and FindIC listings as of 2026-09-20.

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ATSAM4LS2CA-CFU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LS2CA-CFU

ATSAM4LS2CA-CFU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LS2CA-CFU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128 KB of embedded flash and 32 KB of SRAM, housed in a 100-ball VFBGA (7x7 mm) package for industrial temperature ranges. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the lowest tier of the embedded computing hierarchy (MCU -> embedded processor -> system-on-chip -> semiconductor). The SAM4L family belongs to Microchip (formerly Atmel) ARM-based flash MCU lineup, positioned for low-power embedded control applications. Key features include ultra-low active-mode consumption of 90 uA/MHz, sleep mode current as low as 1.5 uA, and wake-up time down to 1.5 us - among the fastest in any Cortex-M4 device. The integrated USB device controller, Peripheral Event System, and SleepWalking peripherals allow data transfer and peripheral operation while the CPU sleeps, dramatically reducing average system power. Technically, the device implements the ARM Cortex-M4 RISC architecture with a 3-stage pipeline, nested vectored interrupt controller, and supply voltage from 1.68 V to 3.6 V. The flash controller supports zero-wait-state execution at reduced frequencies, and the Peripheral Event System routes signals between peripherals without CPU intervention, while SleepWalking lets peripherals wake selectively on qualifying events. Typical applications include battery-powered sensor nodes, portable medical instruments, low-power industrial sensing, and USB-connected human interface devices - anywhere battery life and fast wake-up dominate the design envelope. When designing, exploit SleepWalking and the event system early: architectures that poll in active mode forfeit the SAM4L power advantage, so budget firmware effort for event-driven firmware design. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical low-power design notes not found in the manufacturer datasheet.

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ATSAM4LS4AA-AU - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4LS4AA-AU

ATSAM4LS4AA-AU - 48MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4LS4AA-AU is a 32-bit ARM Cortex-M4 Flash microcontroller running at up to 48 MHz, with 256KB of embedded Flash, in a 48-pin TQFP (7x7 mm) package. It belongs to the SAM4L family, which delivers the lowest active-mode power (90 uA/MHz) and the shortest wake-up time (down to 1.5 us) of any Cortex-M4 device. A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single chip, sitting at the center of the embedded systems hierarchy: semiconductor -> integrated circuit -> microcontroller -> 32-bit ARM-based MCU. MCUs replace discrete processor-plus-peripherals combinations in cost- and power-sensitive designs. Key features include the Cortex-M4 core with DSP instructions and FPU-class math support at 48 MHz, 256KB Flash with a dual-bank safe architecture, 16KB SRAM plus an additional 32KB... [DATA_NEEDED: exact SRAM split]. The device provides a USB device port, a Peripheral Event System for inter-peripheral signaling without CPU intervention, and SleepWalking, which lets peripherals wake and act while the core sleeps. The ATSAM4LS4AA-AU uses the picoPower-class SAM4L architecture with multiple sleep modes and hierarchical clock gating, achieving 1.5 uA in sleep mode. Data written into a RAM-based cache plus a Flash accelerator keeps core cycle efficiency high at 48 MHz. Typical applications are battery-powered sensor nodes, wearable and portable medical devices, USB-connected instrument front ends, and low-power industrial monitoring where long battery life and fast wake-up dominate the design. Design consideration: budget the 90 uA/MHz active current against total system duty cycle; frequent wake-ups favor this device because wake-up takes only 1.5 us. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS4AA-AUR - 48MHz Cortex-M4 MCU, 256KB Flash | Microchip
ATSAM4LS4AA-AUR

ATSAM4LS4AA-AUR - 48MHz Cortex-M4 MCU, 256KB Flash | Microchip

The Microchip Technology ATSAM4LS4AA-AUR is a 32-bit ARM Cortex-M4 Flash microcontroller running at up to 48 MHz with 256KB of embedded Flash memory, integrated crypto acceleration, and a 48-pin TQFP (7x7 mm) package for industrial-temperature applications. A microcontroller (MCU) is a single-chip computer that integrates a processor core, non-volatile Flash program memory, SRAM data memory, and a rich set of peripherals such as timers, serial interfaces, and analog converters. Within the power-management hierarchy of embedded systems, an MCU is the central control element that orchestrates sensors, communication, and user interfaces. The ATSAM4LS4AA-AUR belongs to Microchip's (formerly Atmel) SAM4L family, a line of ultra-low-power ARM Cortex-M4 Flash microcontrollers positioned above the SAM D20 Cortex-M0+ series and alongside Cortex-M4 competitors from other vendors. The defining feature of the ATSAM4LS4AA-AUR is class-leading power efficiency: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us - the shortest in a Cortex-M4 device according to the manufacturer. This combination of low active power and instant wake-up makes it possible to duty-cycle demanding DSP workloads from coin cells or energy-harvesting supplies. The device also integrates a USB device controller, a peripheral event system that routes signals between peripherals without CPU intervention, and the innovative SleepWalking feature, which lets peripherals wake the core only when preprogrammed conditions are met. The crypto-capable variant designated by the MRL/CRYPTO suffix adds hardware security acceleration, offloading symmetric and hash operations from software. Operating from a 1.8V to 3.3V supply (per FindIC specification data), the industrial-temperature-grade part suits -40C to +85C environments. Typical applications include battery-powered sensor nodes, portable medical devices, industrial control panels, and USB-connected data loggers - all scenarios where both 32-bit compute (single-cycle MAC, hardware divide for Cortex-M4 DSP instructions) and microamp sleep currents are mandatory. For design, exploit the SleepWalking and peripheral event system to keep the CPU asleep; the wake-up penalty of only 1.5 us means aggressive power gating rarely impacts responsiveness. Size the decoupling network per the SAM4L datasheet recommendations for the 48-TQFP power pins. This page synthesizes distributor pricing, drop-in family alternatives, and practical low-power design guidance not consolidated in the manufacturer datasheet, giving engineers a single citable reference for the ATSAM4LS4AA-AUR.

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ATSAM4LS4AA-MU - 48MHz Cortex-M4 256KB Flash MCU | Microchip
ATSAM4LS4AA-MU

ATSAM4LS4AA-MU - 48MHz Cortex-M4 256KB Flash MCU | Microchip

The Microchip Technology ATSAM4LS4AA-MU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 256 KB of embedded Flash memory, housed in a 48-pin QFN (7x7 mm) surface-mount package. It belongs to the SAM4L family, which Microchip (formerly Atmel) positions as the lowest-power Cortex-M4 MCU family, delivering 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times down to 1.5 us. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded systems hierarchy: MCU -> embedded processor -> microprocessor-based system. MCUs execute deterministic control and sensing tasks in devices where power budget, cost, and integration matter more than raw throughput. Key features of the ATSAM4LS4AA-MU include the ARM Cortex-M4 core with 32-bit instruction set at up to 48 MHz, 256 KB (256K x 8) of embedded Flash for code storage, an integrated USB device controller, a peripheral event system that routes signals between peripherals without CPU intervention, and the SleepWalking feature that lets peripherals wake the device based on events while RAM and peripheral state are retained. Technically, the SAM4L architecture pairs the Cortex-M4 pipeline with a low-leakage process and a flexible power management scheme with multiple sleep modes. The peripheral event system and SleepWalking offload the CPU, so the core can stay in deep sleep while peripherals such as ADC, timers, and communication blocks continue operating, dramatically reducing average system current in duty-cycled designs. Typical applications include battery-powered portable instruments, sensor nodes and IoT endpoints, and consumer or industrial devices requiring USB connectivity with long battery life. The 48 MHz Cortex-M4 with DSP instructions also handles modest digital filtering and control loops efficiently. For design, minimize active-mode time by exploiting sleep modes and the event system, and verify the exact pinout and peripheral multiplexing from the Microchip SAM4L datasheet before layout, since QFN packages require careful thermal pad soldering. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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