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

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

The Microchip Technology ATSAM4LS4AA-MUR 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) package with exposed pad and supplied in tape and reel packaging for industrial temperature ranges. A microcontroller (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 -> SoC -> computing system. The SAM4L series belongs to Microchip's (formerly Atmel's) ARM-based Flash MCU portfolio, placing a Cortex-M4 core with DSP instructions inside a low-power peripheral set. Key features include the lowest active-mode power in its class at 90 uA/MHz, sleep mode current down to 1.5 uA, and a wake-up time as short as 1.5 us, the fastest in any Cortex-M4 device according to Microchip. The integrated USB device controller, peripheral event system, and SleepWalking technology allow peripherals to operate and wake the core autonomously, minimizing CPU active time in battery-powered designs. Architecturally, the SAM4L combines the 32-bit ARM Cortex-M4 RISC processor with a multi-layer bus matrix, flexible event-driven peripherals, and 3.3V operation. The peripheral event system routes signals between peripherals without core intervention, while SleepWalking lets peripherals pre-process data in low-power sleep states, dramatically reducing average system power in duty-cycled applications. Typical applications include battery-powered sensor nodes, portable medical devices, industrial data loggers, and USB-connected human interface devices, where the combination of 256 KB Flash, USB, and microamp sleep currents fits both connectivity and energy budgets. Design consideration: budget the Flash wait-state configuration carefully at 48 MHz and use the SleepWalking event system to keep the Cortex-M4 core parked whenever possible. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS4BA-AU - 48MHz Cortex-M4 256KB MCU | Microchip
ATSAM4LS4BA-AU

ATSAM4LS4BA-AU - 48MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4LS4BA-AU (originally Atmel) is a 32-bit ARM Cortex-M4 microcontroller running at 48 MHz with 256 KB flash, 32 KB SRAM, and hardware cryptographic acceleration, housed in a 64-pin TQFP (10x10 mm) package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, nonvolatile program memory, RAM, and a rich set of peripherals such as timers, serial interfaces, and analog converters. Microcontrollers sit at the lowest level of the embedded-system hierarchy - below applications processors and system-on-chip devices - and are the workhorses of industrial control, consumer appliances, and IoT nodes. The SAM4L family belongs to the ARM Cortex-M class of energy-efficient 32-bit MCUs, and specifically targets low-power designs with its picoPower technology and multiple sleep modes. Key features of the ATSAM4LS4BA-AU include the single-core ARM Cortex-M4 processor with DSP and floating-point instructions, 256 KB (256K x 8) of single-cycle flash program memory, 32 KB of SRAM, and an AES/DES hardware cryptographic engine highlighted in the Mouser listing (CRYPTO, MRL A, industrial temperature). The device operates from a nominal 3.3 V supply (1.62 V to 3.6 V range typical for the SAM4L family) and is qualified for industrial temperature environments. Peripherals such as USB, USART, SPI, I2C/TWI, 12-bit ADC, and capacitive-touch support (Peripheral Touch Controller) make it a complete system-on-chip for sensing and connectivity tasks. Architecturally, the SAM4L integrates a flash accelerator to keep the Cortex-M4 pipeline fed at 48 MHz, a multi-layer bus matrix, low-leakage process technology, and flexible sleep/shutdown modes with wake-up controllers that reduce standby consumption to microamp levels - a key differentiator versus the SAM4S family for battery-powered designs. Typical applications include low-power industrial sensors and data loggers, consumer appliances with capacitive-touch user interfaces, battery-powered metering and IoT nodes, and secure products that benefit from the on-chip AES/DES crypto accelerator. When designing with this device, budget the flash endurance and use the multiple power domains and sleep modes deliberately: the biggest performance win in SAM4L designs usually comes from firmware power management, not silicon selection. Validate the 64-TQFP (10x10) footprint and decoupling network early. This page synthesizes distributor pricing, drop-in SAM4L family alternatives, and practical design notes not found in the manufacturer datasheet, based on verified web data as of 2026-09-20.

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ATSAM4LS4BA-AUR - 32-bit ARM Cortex-M4 48MHz MCU 256KB | Microchip
ATSAM4LS4BA-AUR

ATSAM4LS4BA-AUR - 32-bit ARM Cortex-M4 48MHz MCU 256KB | Microchip

The Microchip Technology (Atmel) ATSAM4LS4BA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller with a 48 MHz core, 256KB (256K x 8) of embedded flash memory, and industrial temperature operation, housed in a 64-pin TQFP (10x10 mm) surface-mount package on tape and reel. A microcontroller (MCU) is a complete computing system integrated onto a single chip, combining a processor core, program memory, data memory, and a rich set of peripherals. The ARM Cortex-M4 at the heart of the SAM4L family sits near the top of the embedded processor hierarchy, which runs from simple 8-bit cores through Cortex-M0/M0+ up to the DSP-capable Cortex-M4, making the SAM4L suitable for mid-to-high-performance embedded control, sensing, and connectivity tasks. Key features of the ATSAM4LS4BA-AUR include the Cortex-M4 RISC processor running at 48 MHz with single-cycle DSP instructions and a hardware FPU, 256KB of flash for code storage, operation from 1.8V or 3.3V supplies, and an industrial temperature grade of -40C to +85C. The device also integrates a hardware cryptographic engine, as noted on distributor listings (TQFP, Green, IND TEMP, CRYPTO, MRL A), which accelerates AES and other security primitives for secure IoT and connected products. Architecturally, the SAM4L series is optimized for ultra-low-power applications: it uses a low-leakage process and multiple power modes, including sleep, wait, and backup modes, allowing battery-powered designs to spend most of their life in standby while retaining fast wake-up to active execution. The Cortex-M4 core delivers approximately 1.25 DMIPS/MHz, so the 48 MHz clock yields roughly 60 DMIPS, sufficient for sensor fusion, digital filtering, and lightweight protocol stacks. Typical applications include battery-powered industrial sensors, building automation nodes, consumer appliances, portable medical accessories, and secure connected devices where the cryptographic engine and low-power modes directly extend product battery life. For design, budget flash usage carefully: 256KB is generous for control code but tight for large BLE or TLS stacks, in which case a higher-memory SAM4L variant in the same package should be considered. Follow Microchip layout guidance for decoupling and VDDIO domain separation to maximize noise immunity. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, providing a single self-contained reference for selection engineers.

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ATSAM4LS4BA-MU - 48MHz Cortex-M4 256KB MCU | Microchip
ATSAM4LS4BA-MU

ATSAM4LS4BA-MU - 48MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4LS4BA-MU is a 32-bit ARM Cortex-M4 microcontroller running at 48 MHz with 256 KB flash memory and 32 KB SRAM, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a complete computing system on a single chip, integrating a processor core, program memory, data memory, and peripheral functions such as timers, communication interfaces, and analog converters. Within the power-management hierarchy, an MCU like the SAM4L often acts as the master controller of a system, coordinating sensors, power management ICs, and communication devices. The ARM Cortex-M4 core adds DSP instructions and hardware floating-point capability to the widely used 32-bit MCU ecosystem. Key features of the ATSAM4LS4BA-MU include the SAM4L series focus on ultra-low power consumption, a 48 MHz maximum core clock, 256 KB of on-chip flash, 32 KB of SRAM, and an industrial operating temperature range, as confirmed by DigiKey and Mouser distributor listings. The 64-QFN no-lead package supports compact surface-mount designs with good thermal performance via the exposed pad. Technically, the device combines the ARMv7E-M architecture with Microchip (formerly Atmel) peripheral IP from the SAM4L family, offering a 32-bit RISC datapath, nested vectored interrupt controller, and multiple low-power sleep modes. The flash-based program memory allows in-system reprogramming, and the 3.3 V supply class simplifies integration with modern sensors and transceivers. Typical applications include industrial control panels, battery-powered metering and IoT sensor nodes, and consumer appliances that need a balance of DSP-class performance and low standby power. The Cortex-M4 core handles digital filtering and control loops efficiently, while the flash and SRAM capacity suits protocol stacks and small RTOS kernels. When designing with this MCU, budget supply decoupling and PCB thermal relief on the exposed pad early, and verify that 256 KB flash meets final firmware size including a bootloader and OTA margin. This page synthesizes distributor pricing, drop-in alternatives within the SAM4L family, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4LS4BA-MUR - 48MHz Cortex-M4 256KB MCU | Microchip
ATSAM4LS4BA-MUR

ATSAM4LS4BA-MUR - 48MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4LS4BA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller in the SAM4L series, running at up to 48 MHz with 256 KB (256K x 8) of embedded Flash, 32 KB of SRAM, and a 1.68V to 3.6V supply range, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A 32-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, sitting within the broader hierarchy of embedded processors: microcontroller -> ARM Cortex-M core family -> system-on-chip for embedded control. The SAM4L family is Atmel (now Microchip) Flash MCUs based on the high-performance ARM Cortex-M4 RISC processor, which includes a hardware floating-point unit and DSP instructions. Key features include the 48 MHz Cortex-M4 core with FPU, 256 KB Flash and 32 KB SRAM, and low-power operation suited to battery-powered designs. The industrial temperature grade and Tape & Reel (T/R) packaging support automated high-volume assembly. The SAM4L architecture integrates a multi-layer bus matrix, flexible peripheral event system, and power-management controller with multiple sleep modes, allowing peripherals to operate while the CPU sleeps to minimize energy per task in low-power applications. Typical applications include battery-powered portable instruments, industrial sensing and control nodes, and consumer devices requiring a balance of processing performance (hardware floating point at 48 MHz) and low standby power. Design consideration: operate the device within the 1.68V to 3.6V supply window (nominal 3.3V) and confirm GPIO assignments against the manufacturer datasheet before layout, as QFN packages with exposed pads require careful thermal and ground pad soldering. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LS4BA-UUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4LS4BA-UUR

ATSAM4LS4BA-UUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip ATSAM4LS4BA-UUR is a 32-bit ARM Cortex-M4 flash microcontroller from the SAM4L series, running at up to 48 MHz with 256KB (256K x 8) flash memory, 32KB SRAM, and a supply range of 1.62V to 3.6V, housed in a 64-ball WLCSP package measuring 4.31 x 4.43 mm and supplied in tape and reel. 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 -> system-on-chip -> semiconductor device. The SAM4L family belongs to Atmel (now Microchip Technology) ARM-based flash microcontrollers, positioned for low-power embedded control. Key features include the high-performance 32-bit ARM Cortex-M4 RISC processor core, 10-bit and 12-bit ADC options for analog sensing, and operation across multiple nominal supply rails of 1.8V, 2V, 2.3V, and 3.3V. The extremely compact 64-WLCSP (4.31 x 4.43 mm) ball grid array package makes the device attractive for space-constrained portable electronics where board area is the dominant constraint. Technically, the SAM4L series is a member of a family of flash microcontrollers based on the high-performance 32-bit ARM Cortex-M4 RISC processor. The Cortex-M4 core brings hardware DSP instructions and single-cycle MAC capability, allowing filtering and control-loop math to execute efficiently at the modest 48 MHz clock while preserving the SAM4L series low-power design philosophy. Typical applications include battery-powered portable instruments, wearable and sensor-node designs, industrial sensing front-ends using the 10/12-bit ADCs, and compact embedded controllers where a 32-bit ARM ecosystem with 256KB of on-chip flash is required in a minimal footprint. A key design consideration is the WLCSP package itself: wafer-level chip-scale balls demand tight PCB pad accuracy and reflow control, and the underside ball array requires careful via-in-pad or escape-routing strategy for signal access. This page synthesizes distributor pricing, drop-in family alternatives, comparison data, and practical WLCSP layout guidance not consolidated in the manufacturer datasheet.

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ATSAM4LS4CA-AUR - 32-bit ARM Cortex-M4 48MHz MCU | Microchip
ATSAM4LS4CA-AUR

ATSAM4LS4CA-AUR - 32-bit ARM Cortex-M4 48MHz MCU | Microchip

The Microchip Technology ATSAM4LS4CA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 256 KB of embedded flash memory and 32 KB of SRAM, housed in a 100-pin TQFP (14 x 14 mm) surface-mount package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and a rich set of peripherals onto one chip, forming the complete embedded control hierarchy: processor core -> MCU -> embedded system. The ATSAM4LS4CA-AUR belongs to the Atmel/Microchip SAM4L family, built on the ARM Cortex-M4 RISC architecture with Thumb-2 instruction set, positioning it in the mainstream 32-bit embedded controller class between simple Cortex-M0 parts and high-performance Cortex-M7 devices. Key features include the high-efficiency Cortex-M4 core with DSP-friendly single-cycle multiply instructions, 256 KB (256K x 8) of flash program memory, 32K x 8 SRAM, and an ultra-low-power design that makes the SAM4L series a benchmark for energy-sensitive applications. On-chip analog includes both 10-bit and 12-bit ADC capability per distributor data, and security is supported by a hardware AES crypto module, as noted in Mouser listing attributes (CRYPTO). Technically, the SAM4L implements a multilayer bus matrix, sleepwalking peripheral operation, and multiple low-power sleep modes so that RAM retention and peripheral wake-up can be managed independently of the CPU clock. The industrial temperature grade (-40C to +85C) and 1.68 V to 3.6 V single-supply operation allow direct battery and 3.3 V rail designs. Typical applications include portable battery-powered instruments, industrial sensors and actuators, consumer appliances, and low-power IoT nodes where the 48 MHz Cortex-M4 core processes control loops and sensor data with crypto-secured communication links. When designing with this device, budget the flash endurance and use the on-chip brown-out and clock-fail detection features; supply decoupling on all VDD/VDDIO pairs and a clean 3.3 V rail preserve ADC accuracy. This page adds distributor pricing tiers, drop-in family alternatives, design notes, and comparison data synthesized from DigiKey, Mouser, Octopart, and LCSC listings - information not consolidated in the manufacturer datasheet.

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