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ATSAM4E8CB-CNR - 120MHz Cortex-M4 MCU 512KB | Microchip
ATSAM4E8CB-CNR

ATSAM4E8CB-CNR - 120MHz Cortex-M4 MCU 512KB | Microchip

The Microchip Technology ATSAM4E8CB-CNR is a 32-bit ARM Cortex-M4 microcontroller with floating point unit, running at up to 120 MHz, with 512 KB of embedded Flash memory, housed in a 100-ball TFBGA (9x9 mm) package for extended temperature operation. A microcontroller (MCU) is a single-chip computer integrating a processor core, memory, and peripherals on one die, forming the lowest layer of the embedded systems hierarchy: MCU -> embedded processor -> system-on-chip. The SAM4E series belongs to Microchip (formerly Atmel) SMART ARM-based flash MCU family, positioned for connectivity-rich industrial and consumer applications. Key features of the ATSAM4E8CB-CNR include the Cortex-M4 core with hardware FPU for single-precision math, a 2 KB cache that sustains high data bandwidth from Flash, and a rich peripheral set highlighted by an integrated 10/100 Mbps Ethernet MAC with IEEE 1588 precision time protocol support, enabling single-chip networked nodes without external MAC devices. Architecturally, the SAM4E series combines the 120 MHz Cortex-M4 with multi-layer bus matrix (HSMCI, EBI/SMC external bus interface) for parallel data throughput, plus DMA-driven peripherals that offload the CPU. The flash accelerator and cache structure minimize wait states, allowing deterministic real-time execution. Atmel-11157 is the family datasheet covering SAM4E16E/SAM4E8E/SAM4E16C/SAM4E8C devices including the ATSAM4E8C. Typical applications include industrial Ethernet-connected nodes (gateways, sensors with network interfaces), building automation controllers, consumer appliances with connectivity, and motor control systems that benefit from the FPU and 120 MHz performance. Design consideration: the 100-TFBGA (9x9 mm, 0.8 mm ball pitch) requires controlled-impedance PCB fabrication and X-ray inspection capability; confirm Ethernet magnetics pairing and supply sequencing against the family datasheet before layout. This page synthesizes distributor availability data, family datasheet references, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4E8EA-AU - 120MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4E8EA-AU

ATSAM4E8EA-AU - 120MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4E8EA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 120 MHz with 512 KB (512K x 8) of embedded Flash memory, 2 KB instruction cache, and a 144-pin LQFP (20 x 20 mm) surface-mount package. It integrates a Floating Point Unit (FPU), DSP instructions, and a Memory Protection Unit (MPU), making it a high-performance embedded controller for connectivity-rich industrial designs. 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 processing hierarchy that spans from MCUs up to application processors and SoCs. The SAM4E family belongs to Microchip (formerly Atmel) SMART ARM-based MCU portfolio, positioned for applications that need both compute performance and rich communication peripherals. Key features of the ATSAM4E8EA-AU include the ARM Cortex-M4 core with Thumb-2 instruction set, DSP and single-cycle MAC instructions for signal processing, an FPU for efficient floating-point math, and a 2 KB cache that sustains near-zero-wait-state execution at 120 MHz. Peripheral richness includes Ethernet MAC with IEEE 1588 support, dual CAN controllers, USB device port, multiple USART/SPI/TWI serial channels, a 12-bit ADC with 2 MspS conversion capability, PWM channels, and an on-chip temperature sensor, enabling industrial networked designs with a single IC. Architecturally, the device uses a high data bandwidth multi-layer bus matrix connecting the Cortex-M4 core to Flash, SRAM, and DMA channels, allowing peripherals to transfer data without CPU intervention. The Flash accelerator and cache mitigate flash wait-state penalties at 120 MHz operation. Green industrial-grade (TEMPMRL) qualification supports extended industrial ambient temperatures. Typical applications include industrial automation gateways and PLC I/O modules using the Ethernet and dual CAN interfaces, motor control and power conversion leveraging the FPU and PWM peripherals, and embedded networking equipment, POS terminals, and building automation nodes requiring USB and Ethernet connectivity. When designing with this MCU, budget Flash wait states and use the cache-friendly code layout, and decouple all VDDIO/VDDCORE supply domains per the manufacturer datasheet layout guidance. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-20.

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ATSAM4E8EA-AUR - 120MHz ARM Cortex-M4 MCU 512KB | Microchip
ATSAM4E8EA-AUR

ATSAM4E8EA-AUR - 120MHz ARM Cortex-M4 MCU 512KB | Microchip

The Microchip Technology ATSAM4E8EA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 120 MHz with 512 KB (512K x 8) embedded flash and 128 KB SRAM, housed in a 144-pin LQFP (20 x 20 mm) package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest level of the embedded systems hierarchy: MCU -> embedded processor -> computing system. The SAM4E family belongs to Microchip's (formerly Atmel) SMART ARM-based MCU portfolio, targeting industrial connectivity applications that require both control performance and rich connectivity. Key features of the ATSAM4E8EA-AUR include the ARM Cortex-M4 core with a 2 KB cache, a hardware Floating Point Unit (FPU), DSP instructions, Thumb-2 instruction set support, and a Memory Protection Unit (MPU). The high data bandwidth architecture enables deterministic real-time execution while the FPU accelerates control algorithms such as PID loops and digital filtering. Technical depth: the Cortex-M4 core with 2 Kbytes cache reduces flash wait-state penalties at 120 MHz operation, while the MPU supports functional-safety-oriented software partitioning. Embedded flash allows in-field firmware updates without external memory. Typical applications include industrial automation, building and factory control, gateways and connectivity nodes, and motor control systems that leverage the DSP and FPU capability of the Cortex-M4 core. Design consideration: verify supply voltage, peripheral set, and I/O configuration against the official SAM4E datasheet before layout, and confirm the 144-LQFP (20x20) footprint dimensions against the land pattern data. This page synthesizes distributor pricing, stock status, drop-in family alternatives, and practical design guidance not consolidated in the manufacturer datasheet.

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ATSAM4E8EA-CU - Cortex-M4 120MHz 512KB MCU | Microchip
ATSAM4E8EA-CU

ATSAM4E8EA-CU - Cortex-M4 120MHz 512KB MCU | Microchip

The Microchip ATSAM4E8EA-CU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 120 MHz, with 512KB of embedded Flash memory, a 2KB instruction cache, and a floating point unit (FPU), housed in a 144-ball LFBGA package measuring 10x10 mm. A microcontroller (MCU) is a single-chip computing device that integrates a processor core, program memory, data memory, and peripherals on one die, forming the lowest level of the embedded-system hierarchy (embedded system -> MCU -> CPU core). The SAM4E series belongs to Microchip's SMART ARM-based flash MCU family, positioned for high-performance industrial and connectivity applications where 32-bit processing and hardware math acceleration are required. Key features of the ATSAM4E8EA-CU include the ARM Cortex-M4 core with DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU) for robust software partitioning, a 2KB cache that improves execution efficiency from Flash, and a high data bandwidth bus architecture. The 512KB (512K x 8) Flash accommodates large application images including RTOS stacks, communication protocol stacks, and OTA updatable firmware. The device operates from a 1.2 V core supply with 3.3 V I/O, and is supplied in industrial temperature grade, lead-free green LFBGA packaging. The fine-pitch ball grid array saves PCB area compared with LQFP alternatives, which matters in dense multi-board industrial designs. The built-in FPU executes single-precision floating point in hardware, removing software emulation overhead in control loops and signal processing. Typical applications include industrial automation controllers, motor control, IoT gateways, and connected sensing nodes where the Cortex-M4 performance class and Flash capacity fit control and communication duties simultaneously. Design consideration: LFBGA packages require controlled-impedance PCB fabrication with fine-pitch assembly; confirm your CMOS/PCB process supports ball pitch before layout. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4E8EB-AN - 120MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4E8EB-AN

ATSAM4E8EB-AN - 120MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4E8EB-AN is a 32-bit ARM Cortex-M4 flash microcontroller from the Atmel | SMART SAM4E series, running at up to 120 MHz with 512 KB (512K x 8) of embedded Flash and 128 KB of SRAM, housed in a 144-pin LQFP (20 x 20 mm) surface-mount package. It includes a hardware floating point unit (FPU) for efficient single-precision math. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the heart of an embedded system. Within the MCU hierarchy, the SAM4E family sits in the high-performance 32-bit segment, above 8-bit AVR parts and below application processors, targeting industrial and connectivity-driven designs. Key features include the 120 MHz Cortex-M4 core with FPU, 2 KB of cache memory for predictable Flash execution, 512 KB of program Flash, and a rich peripheral set highlighted by an integrated 10/100 Ethernet MAC for networked nodes. Advanced connectivity peripherals reduce external component count and BOM cost in communication-centric products. Technically, the SAM4E architecture pairs the Cortex-M4 pipeline with a multi-layer bus matrix and 2 KB cache, sustaining near-zero-wait-state execution and deterministic interrupt latency. The on-chip Ethernet MAC with DMA offloads frame handling from the CPU, while serial peripherals (USART, SPI, I2C) and timers support industrial protocols and control loops. Extended-temperature, green (halogen-free, RoHS-oriented) packaging supports harsh industrial environments. Typical applications include industrial automation gateways and networked sensor nodes using the 10/100 Ethernet MAC, building automation and HVAC controllers, and test/measurement or data-logging systems that need the FPU for signal processing at 120 MHz. For design, budget the 512 KB Flash and 128 KB SRAM early - the cache mitigates but does not eliminate wait states, and Ethernet applications should reserve SRAM for DMA descriptors and frame buffers. Verify pin multiplexing on the 144-LQFP before finalizing the PCB, since many pins serve multiple peripheral functions. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-20.

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ATSAM4E8EB-ANR - 120MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4E8EB-ANR

ATSAM4E8EB-ANR - 120MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4E8EB-ANR is a 32-bit ARM Cortex-M4 flash microcontroller in the SAM4E series, running at 120 MHz with 512 KB of embedded flash memory and 128 KB of SRAM, housed in a 144-pin LQFP (20x20 mm) surface-mount package rated for -40C to +105C operation. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the basis of embedded systems. The SAM4E family sits within Microchip's SMART ARM-based MCU portfolio: Cortex-M4 core -> 32-bit microcontroller -> embedded processing. The -B suffix denotes Revision B silicon, which Microchip recommends for both prototypes and new production designs. Key features of the ATSAM4E8EB-ANR include the ARM Cortex-M4 core with an integrated floating point unit (FPU), which accelerates DSP and math-intensive firmware; a high data bandwidth bus architecture; 512 KB (512K x 8) of flash for program storage; and 128 KB of SRAM for data buffers and stack. The extended industrial temperature grade (-40C to +105C) supports harsh environments. Architecturally, the SAM4E8E targets applications needing both processing throughput and rich connectivity, with a multi-layer bus matrix that lets DMA, Ethernet-class peripherals, and the core operate concurrently with minimal contention. The 120 MHz clock enables single-cycle flash access with prefetch buffering to keep pipeline stalls low. Typical applications include industrial automation controllers, networking and communication equipment, and embedded systems requiring deterministic floating point processing such as motor control and sensing nodes. When designing with this device, verify that your supply chain references the Revision B silicon (-B suffix), since Microchip recommends Revision B for new designs and production, while earlier steppings may differ errata-wise. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, adding sourcing and selection value beyond raw specification tables.

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ATSAM4E8EB-CN - 120MHz Cortex-M4 MCU 512KB Flash | Microchip
ATSAM4E8EB-CN

ATSAM4E8EB-CN - 120MHz Cortex-M4 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM4E8EB-CN is a 32-bit ARM Cortex-M4 flash microcontroller with integrated FPU, running at 120 MHz, with 512KB of embedded Flash and a 144-ball LFBGA (10x10 mm) package. A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, memory, and programmable peripherals on one die, sitting within the broader hierarchy of semiconductor devices: Cortex-M4 core -> ARM 32-bit MCU -> microcontroller -> embedded processor. The SAM4E series belongs to Atmel (now Microchip) SMART ARM-based Flash MCU family, designed for connectivity-centric embedded systems. Key features include the high-performance Cortex-M4 core with hardware floating point unit (FPU), 2KB instruction cache for improved flash execution efficiency, and 128KB of SRAM for data buffering. The SAM4E family integrates advanced connectivity peripherals, most notably a 10/100 Ethernet MAC, alongside UART, USART, SPI, I2C (TWI) and CAN interfaces, plus a 12-bit ADC and PWM channels for control tasks. The device operates from 1.2V, 2.5V, and 3.3V supply domains per the Arrow listing, with extended temperature support per Mouser data. Technically, the SAM4E achieves 1.25 DMIPS/MHz from the Cortex-M4 pipeline, and the 2KB cache allows zero-wait-state execution from Flash at 120 MHz, mitigating flash access latency. The Ethernet MAC with DMA offloads network stack processing from the CPU, making it well suited for connected industrial nodes. Typical applications include industrial Ethernet gateways, building automation and HVAC controllers, networked sensor nodes, and motor-control systems where the FPU accelerates control-loop math. Design consideration: BGA packages require controlled-impedance PCB stackups and X-ray inspection capability; plan the fanout strategy early and consider the LQFP-packaged SAM4E8EA sibling if BGA assembly is not available. This page synthesizes distributor availability, drop-in family alternatives, pricing tiers, and practical design notes not found in the manufacturer datasheet. Pricing shown as of 2026-09-20.

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ATSAM4LC2AA-AU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2AA-AU

ATSAM4LC2AA-AU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology (Atmel) ATSAM4LC2AA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128KB of embedded flash memory, housed in a 48-pin TQFP (7x7 mm) package. It delivers class-leading low-power operation: 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 computer that integrates a processor core, memory, and peripherals onto one die, forming the lowest layer of the embedded systems hierarchy (embedded IC -> microcontroller -> ARM Cortex-M MCU -> SAM4L family). The SAM4L series belongs to Microchip's ARM-based flash MCU portfolio, designed for ultra-low-power battery-operated and energy-harvesting systems. Key features include the 32-bit ARM Cortex-M4 core with 48 MHz maximum frequency, 128KB (128K x 8) flash memory, an integrated segment LCD controller, hardware cryptography accelerators, and USB device/host capability. These features allow the SAM4LC2 to drive displays, secure data, and connect to USB hosts without external components, reducing BOM cost in portable products. Technically, the device combines the Cortex-M4 processing pipeline with Microchip's low-power peripheral bus architecture and a flexible event system that lets peripherals communicate without CPU intervention. Multiple sleep modes with rapid wake-up, plus dynamic clock gating, make it suitable for duty-cycled applications where average current, not peak performance, dominates battery life. Supply voltage is 3.3 V, typical of industrial and portable logic levels. Typical applications include battery-powered metering and data loggers, segment-LCD human-machine interfaces, portable medical and wellness devices, and USB-connected sensor nodes. The LCD controller plus low sleep current directly benefits instruments that must show readings continuously on a coin-cell or primary battery. When designing with this MCU, budget power by exploiting sleep modes and the event system; wake-up from sleep in as little as 1.5 us allows frequent duty cycling without latency penalties. Verify flash and SRAM sizing against code footprint before committing, since the 128KB flash tier is the smallest in parts of this pinout family. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC2AA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2AA-AUR

ATSAM4LC2AA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2AA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128 KB of embedded flash memory and a 48-pin TQFP (7x7 mm) package. It belongs to the ultra-low-power SAM4L family, delivering the lowest active-mode consumption in its class at 90 uA/MHz, 1.5 uA in sleep mode, and wake-up times as short as 1.5 us. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, sitting at the heart of embedded systems as part of the wider hierarchy of semiconductor devices: MCU -> 32-bit MCU -> ARM Cortex-M MCU -> flash microcontroller. The SAM4L family positions itself at the low-power end of the 32-bit MCU spectrum, targeting battery-powered and energy-harvesting designs. Key differentiating features include the hardware-based Peripheral Event System that lets peripherals communicate without CPU intervention, a built-in LCD controller for segment and dot-matrix glass, AES/DES hardware cryptography, and a flexible, low-leakage power architecture with multiple sleep modes and a Backup mode drawing under 1 uA. Peripherals include USB (device/host), TWI/I2C, SPI, UART/USART, an ADC, and multiple timers. Architecturally, the Cortex-M4 core with integrated NVIC and single-cycle multiply executes from flash with a prefetch buffer, while the PDCA (Peripheral DMA Controller) offloads data movement from the CPU, directly enabling the 90 uA/MHz figure by shortening active periods. The SCIF (System Control Interface) manages oscillators, PLLs, and the DFLL for flexible clocking at minimal power. Typical applications include battery-powered metering, wearable and handheld devices with LCD glass, sensor nodes, and low-power industrial control. The LCD controller plus cryptography make it especially strong for smart meters and secure portable products. Design consideration: exploit the Peripheral Event System and sleep modes aggressively; keeping the CPU asleep between events is the primary path to the datasheet power figures. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC2AA-MUR - Cortex-M4 48MHz 128KB Flash MCU | Microchip
ATSAM4LC2AA-MUR

ATSAM4LC2AA-MUR - Cortex-M4 48MHz 128KB Flash MCU | Microchip

The Microchip Technology (Atmel) ATSAM4LC2AA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128KB of Flash memory, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It belongs to the SAM4L family, which delivers class-leading efficiency with 90 uA/MHz active-mode current, 1.5 uA sleep-mode current, and wake-up times down to 1.5 us. A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, memory, and peripherals on one die; within the power-management hierarchy of embedded systems, ultra-low-power MCUs like the SAM4L sit between simple 8-bit controllers and high-performance application processors, targeting battery-powered and energy-harvesting designs. Key differentiating features include an embedded hardware capacitive touch controller (QTouch) supporting up to 13 touch channels, USB device and embedded host operation, and a 128-bit AES cryptographic accelerator for secure data handling. A segment LCD controller drives displays directly, and high-speed serial peripherals (USART, SPI, I2C) plus audio interfaces cover most connectivity needs. Technically, the Cortex-M4 core provides single-cycle DSP instructions and hardware floating-point acceleration, while the Peripheral Event System and SleepWalking architecture allow peripherals to communicate and process data autonomously while the CPU sleeps, dramatically cutting average power consumption in duty-cycled systems. Typical applications include battery-powered metering, wearable and handheld devices, capacitive-touch human-machine interfaces with LCD feedback, and USB-connected sensor nodes where microamp sleep currents determine battery service life. Design consideration: the 48-QFN exposed-pad package requires a solid ground vias array under the pad for both thermal dissipation and signal integrity; budget GPIO carefully, as the 48-pin footprint limits available I/O. This page synthesizes distributor pricing from LCSC, DigiKey and Mouser, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC2BA-AU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2BA-AU

ATSAM4LC2BA-AU - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2BA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 128KB of Flash memory and 32KB of SRAM, housed in a 64-pin TQFP (10x10 mm) surface-mount package. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, memory, and peripheral functions such as ADCs, timers, and serial interfaces onto one die. The ATSAM4LC2BA-AU belongs to the voltage-regulator-adjacent class of power management in the sense of system power budgets: within the MCU taxonomy it sits at ARM Cortex-M4 > SAM4L series > low-power flash microcontroller > embedded processor > semiconductor IC. Key differentiating features include industry-leading low power: approximately 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 shortest wake-up time among Cortex-M4-based devices. The part integrates cryptographic acceleration (CRYPTO/AES) and offers 10-bit and 12-bit ADC options per distributor listings. The Cortex-M4 core includes a hardware FPU and DSP instructions, enabling efficient signal processing at only 48 MHz. Architecturally, the SAM4L series uses a low-power design methodology that allows individual peripherals to be clock-gated and power-domained, so battery-operated systems spend the majority of time in low-leakage states while retaining fast responsiveness. The 128KB Flash with the flash accelerator achieves near-zero-wait-state execution for most code. Typical applications include battery-powered sensor nodes, portable medical monitoring devices, smart metering, industrial sensor interfaces, and any battery life-critical IoT endpoint that still requires FPU/DSP-class computation. Design consideration: the -AU suffix denotes the industrial-temperature, TQFP-64 (Green) variant; verify supply voltage and peripheral pin mapping against the official datasheet before PCB layout, as SAM4L peripheral multiplexing is flexible but pin-specific. This page synthesizes distributor pricing, drop-in alternatives within the SAM4L family, and practical design guidance not found in the manufacturer datasheet, giving engineers a single citable reference for the ATSAM4LC2BA-AU.

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ATSAM4LC2BA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2BA-AUR

ATSAM4LC2BA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2BA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128KB of flash memory, housed in a 64-pin TQFP (10x10 mm) package in the SAM4L series. It operates from a 1.8V, 2.5V, or 3.3V supply and delivers industry-leading low-power performance: 90 uA/MHz in active mode, 1.5 uA in sleep mode, and a wake-up time as short as 1.5 us. A microcontroller unit (MCU) is a single-chip embedded computer combining a processor core, memory, and peripherals. Within the power-management hierarchy, low-power MCUs like the SAM4L sit at the heart of battery-powered and energy-harvesting systems, where sleep-mode current and wake-up latency directly determine battery life. The SAM4L family is Microchip's (formerly Atmel's) ultra-low-power Cortex-M4 line optimized for sleepwalking peripherals and fast context restoration. Key differentiating features of the ATSAM4LC2BA-AUR include the 48 MHz Cortex-M4 core with DSP instructions and hardware crypto capability, 128KB of embedded flash, industrial temperature qualification, and green (RoHS-oriented) packaging. The MRL designation indicates Microchip's multi-market reel labeling; the "B" suffix denotes the cache-equipped device variant. Its peripheral set and low-power modes allow systems to keep data acquisition running while the CPU sleeps, using the sleepwalking feature to wake only when data is ready. Technically, the device leverages the ARM Cortex-M4 32-bit RISC architecture with a nested vectored interrupt controller and an efficient flash accelerator, achieving near-zero-wait-state execution at 48 MHz. The ultra-low active current of 90 uA/MHz stems from Microchip's low-leakage process and fine-grained clock gating; sleep modes down to 1.5 uA retain SRAM and register context, and wake-up in 1.5 us makes intermittent operation practical for event-driven designs. Typical applications include battery-powered sensor nodes, energy metering, portable medical devices, and industrial data loggers, where the 1.5 us wake-up enables servicing sporadic events without maintaining high current draw. The hardware crypto supports secure IoT nodes. Design consideration: power budget calculations should weight active-mode uA/MHz against duty cycle; a system waking every second for a few milliseconds of 48 MHz computation averages microamps, so minimizing wake-up frequency dominates battery life. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical low-power design notes not consolidated in the manufacturer datasheet.

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ATSAM4LC2BA-MUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2BA-MUR

ATSAM4LC2BA-MUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2BA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller with 128KB (128K x 8) flash, 32KB (32K x 8) SRAM, and a 48MHz core operating from a 1.62V to 3.6V supply, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals. The SAM4L family sits in the ARM Cortex-M4 class of 32-bit MCUs, part of the wider microcontroller hierarchy used in embedded systems for low-power sensing, touch interfaces, and USB-connected applications. Key features include class-leading low-power figures of 90 uA/MHz in active mode and 1.5 uA in sleep mode, wake-up times down to 1.5 us, 21 capacitive touch channels driven by the peripheral touch controller (PTC), a USB 2.0 full-speed device interface, and multiple sleep and backup modes. A hardware AES cryptographic module and an on-board 12-bit ADC and DAC round out the analog and security capabilities. Technically, the Cortex-M4 core with flexible power-clocked domains allows each peripheral to be individually clocked and power-gated, which is how the ATSAM4LC2BA achieves its industry-low active and sleep consumption while retaining rapid wake-up - critical for duty-cycled battery designs. Typical applications include battery-powered metering and sensor nodes, capacitive touch user interfaces, USB-connected handheld instruments, and wearable or IoT devices where battery life is the primary design constraint. Design consideration: because the 64-QFN exposed pad is the main ground and thermal path, ensure the PCB provides a solid ground plane connected to the pad with an array of thermal vias. This page adds value beyond the datasheet by synthesizing distributor pricing, drop-in alternatives within the SAM4L family, application guidance, and design notes in one place.

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ATSAM4LC2CA-AU - 48MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4LC2CA-AU

ATSAM4LC2CA-AU - 48MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2CA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz, integrating 128 KB of embedded flash memory and 32 KB of SRAM in a 100-pin TQFP (14x14 mm) surface-mount package. It belongs to the SAM4L family, which Microchip (formerly Atmel) positions as the lowest-power Cortex-M4-based MCU family, consuming 90 uA/MHz in active mode, 1.5 uA in sleep mode, and offering wake-up times down to 1.5 us. A microcontroller unit (MCU) is a single-chip embedded processor that combines a CPU core, program memory, data memory, and peripherals on one die. Within the semiconductor hierarchy, the ATSAM4LC2CA-AU is a member of the MCU class: integrated circuit > embedded processor > microcontroller > ARM Cortex-M4 flash MCU. MCUs replace multi-chip CPU-plus-memory solutions in embedded systems where cost, power, and board area dominate. Key differentiating features include hardware cryptography (AES, DES, triple-DES accelerator), an integrated segment LCD controller, USB host and device support, 16-channel DMAC for autonomous data transfers, and an extensive peripheral set: 7 timers, 4 comparators, 4 USARTs, and 4 TWI (I2C) interfaces, plus multiple SPI ports. The peripheral event system lets peripherals communicate without CPU intervention, further reducing active-mode energy. Architecturally, the Cortex-M4 core provides a 3-stage pipeline, single-cycle MAC, and DSP-oriented instructions. Microchip's picoPower techniques, multi-layer bus matrix, and sleepwalking peripherals (which operate while the CPU sleeps) enable battery-powered designs with multi-year battery life. The integrated hardware crypto engine offloads AES/DES encryption without software overhead, valuable for secure IoT nodes. Typical applications include battery-powered metering, portable medical instruments, industrial sensor nodes with segment-LCD displays, and secure connected devices. The LCD controller directly drives glass displays, eliminating an external LCD driver IC. Design consideration: the SAM4L operates from a 1.62 V to 3.6 V supply; plan brown-out and BOD33 settings early, and use the sleepwalking ADC/USART modes to maximize sleep duty cycle. This page synthesizes drop-in family alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-20 available on request.

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ATSAM4LC2CA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4LC2CA-AUR

ATSAM4LC2CA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4LC2CA-AUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128KB of embedded flash memory, housed in a 100-pin TQFP (14x14 mm) package for industrial-temperature applications. A microcontroller unit (MCU) integrates a processor core, memory, and programmable peripherals on a single chip, sitting at the center of the embedded systems hierarchy - above simple logic ICs and below full application processors. The SAM4L family belongs to Microchip's (formerly Atmel) ARM-based flash MCU portfolio, targeting low-power embedded designs within the broader power-management-conscious MCU market. Key features include the lowest active-mode consumption in its class at 90 uA/MHz, deep sleep mode at just 1.5 uA, and the shortest wake-up time of any Cortex-M4-based device at down to 1.5 us, per the manufacturer's product data. The device integrates an LCD controller, hardware cryptography, and USB host capability, reducing external component count in human-interface and secure connected designs. Technically, the SAM4LC2C implements the ARM Cortex-M4 RISC core with a three-stage pipeline and efficient interrupt handling (NVIC), balancing compute performance against the family's dominant design goal: energy efficiency across active, sleep, and wake-up states. The 1.8V/3.3V supply capability with a 1.68V minimum matches both coin-cell and USB-powered architectures. Typical applications include battery-powered metering with segmented LCDs, portable medical devices, industrial sensors, and security products leveraging the hardware crypto engine and USB host port. Design consideration: exploit the 1.5 us wake-up time by aggressively cycling between sleep and active states rather than reducing clock frequency, which maximizes the 90 uA/MHz efficiency advantage. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC2CA-CFU - ARM Cortex-M4 48MHz 128KB Flash MCU | Microchip
ATSAM4LC2CA-CFU

ATSAM4LC2CA-CFU - ARM Cortex-M4 48MHz 128KB Flash MCU | Microchip

The Microchip Technology ATSAM4LC2CA-CFU (originally Atmel SAM4L series) is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz with 128 KB (128K x 8) of FLASH program memory, 32 KB of SRAM, and a hardware cryptography engine, housed in a 100-ball VFBGA (7 x 7 mm) package rated for the industrial temperature range. A 32-bit microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, program memory, data memory, and a rich set of peripherals. Within the power-management hierarchy of an embedded system, an MCU such as the SAM4L sits at the control layer, orchestrating sensors, communication interfaces, displays, and actuators while managing its own power budget. The ARM Cortex-M4 core used here adds DSP instructions and single-cycle MAC for efficient signal processing. Key features of the ATSAM4LC2CA-CFU include the ultra-low-power SAM4L platform architecture, supply operation from 1.68 V to 3.6 V (1.8 V, 2.5 V, or 3.3 V systems), and an integrated cryptography engine (the Mouser listing identifies this as CRYPTO variant). The SAM4L family is known for its low-power modes, sleepwalking peripherals, and energy-efficient peripheral event system that allows autonomous operation without CPU intervention. Technically, the device executes the ARM Cortex-M4 RISC instruction set, providing 32-bit processing with deterministic interrupt handling suitable for real-time embedded applications. The 128 KB flash is in-system programmable, and the 32 KB SRAM supports demanding buffering and DSP workloads at the 48 MHz maximum clock frequency. Typical applications include battery-powered IoT sensor nodes, portable medical monitoring devices, low-power industrial sensing, and secure connected products where the crypto engine accelerates authentication tasks. When designing with this part, plan power distribution for the 1.68 V to 3.6 V supply range and account for the BGA package reflow requirements, since the 7 x 7 mm 100-ball array requires X-ray inspection capability for quality control. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the standard manufacturer datasheet.

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ATSAM4LC2CA-CFUR - Cortex-M4 48MHz 128KB MCU | Microchip
ATSAM4LC2CA-CFUR

ATSAM4LC2CA-CFUR - Cortex-M4 48MHz 128KB MCU | Microchip

The Microchip Technology ATSAM4LC2CA-CFUR is a 32-bit ARM Cortex-M4 microcontroller running at up to 48 MHz with 128KB (128K x 8) of embedded Flash memory, housed in a 100-ball VFBGA (7x7 mm) package on tape and reel. It operates from a 1.62V to 3.6V supply (1.8V, 2.5V, and 3.3V nominal rails) across the industrial temperature range. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. MCUs sit at the heart of the embedded systems hierarchy - below application processors and above dedicated ASICs - and the SAM4L family belongs to the 32-bit ARM Cortex-M class of flash microcontrollers used for low-power control and connectivity tasks. Key features of the ATSAM4LC2CA-CFUR include the high-performance ARM Cortex-M4 RISC core with 48 MHz maximum frequency, 128KB on-chip Flash for program storage, and the low-power SAM4L architecture that emphasizes energy-efficient operation. The VFBGA-100 (7x7 mm) ball grid array minimizes board area for space-constrained designs, and per distributor listings the device integrates cryptographic hardware support (CRYPTO) and carries RoHS-green packaging. Technically, the SAM4L series implements the ARMv7E-M architecture with a 3-stage pipeline, providing DSP-oriented instructions and efficient interrupt handling. The die is fabricated for industrial-grade operation, and Microchip (via the Atmel acquisition) supplies the 1200-plus-page SAM4L datasheet covering power modes, peripheral sets, and memory organization for the family. Typical applications include battery-powered portable instruments, industrial sensors and actuators, building automation nodes, and consumer devices that need 32-bit processing in a compact 7x7 mm footprint. The Cortex-M4 core with DSP capability suits digital filtering and control loops, while the low-power design supports long battery life. When designing with this device, confirm the exact supply range and peripheral mapping against the manufacturer datasheet before layout, and verify BGA land pattern and reflow profile compatibility for the 0.8 mm ball pitch VFBGA package. This page synthesizes distributor pricing context, drop-in alternatives within the SAM4L family, and practical design notes not found in a single manufacturer datasheet, giving engineers and buyers a consolidated reference for the ATSAM4LC2CA-CFUR.

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ATSAM4LC4AA-AU - 48MHz Cortex-M4 256KB Flash MCU | Microchip
ATSAM4LC4AA-AU

ATSAM4LC4AA-AU - 48MHz Cortex-M4 256KB Flash MCU | Microchip

The Microchip ATSAM4LC4AA-AU (originally Atmel) is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 48 MHz with 256 KB (256K x 8) of FLASH program memory and 32 KB of SRAM, housed in a 48-pin TQFP (7x7 mm) surface-mount package. A microcontroller (MCU) is a single-chip integrated circuit that combines a processor core, program memory, data memory, and peripherals into one device, forming the lowest layer of the embedded-system hierarchy above discrete logic and below application processors. The SAM4L series belongs to Microchip's ARM-based flash MCU portfolio and targets ultra-low-power embedded applications where battery life and wake-up responsiveness dominate the design. The defining strength of the ATSAM4LC4AA-AU is power efficiency: it delivers approximately 90 uA/MHz in active mode, 1.5 uA in sleep mode, and one of the shortest wake-up times in any Cortex-M4-based device at down to 1.5 microseconds. These figures allow duty-cycled battery products to spend most of their life asleep yet react near-instantly to events. The supply voltage range is 1.68 V to 3.6 V, accommodating single-cell lithium and 3.3 V rails directly. The ARM Cortex-M4 core provides 32-bit RISC execution with DSP-oriented instructions, enabling efficient signal processing such as sensor filtering without a separate DSP. The SAM4L family architecture integrates a flexible power management controller with multiple sleep modes, letting firmware gate clocks and domains per peripheral. Flash memory of 256 KB is executed in place, and the 32 KB SRAM supports buffering for wireless stacks and data logging. Typical applications include battery-powered IoT sensor nodes, portable medical and measurement instruments, capacitive-touch human-machine interfaces, and industrial sensing endpoints where 90 uA/MHz active current directly extends field life. The 48 MHz performance headroom also suits lightweight motor control and data-acquisition tasks. A key design consideration is that the SAM4L platform uses a 1.8 V to 3.3 V logic domain; interface 5 V systems through level shifters. Enable the device's low-power sleep modes and per-peripheral clock gating in firmware to realize the datasheet current figures. This page synthesizes distributor availability data, same-family drop-in options, pricing guidance, and practical design notes beyond what the manufacturer datasheet alone provides.

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ATSAM4LC4AA-MU - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4LC4AA-MU

ATSAM4LC4AA-MU - 48MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4LC4AA-MU is a 32-bit ARM Cortex-M4 flash microcontroller from the SAM4L series operating at 48 MHz with 256KB of embedded flash memory, 32KB of SRAM, and a 48-pin QFN (7x7 mm) exposed-pad 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 tier of the embedded-computing hierarchy: MCU -> embedded processor -> system-on-chip -> embedded system. The ATSAM4LC4AA-MU belongs to the low-power SAM4L family of ARM Cortex-M4 microcontrollers, which targets battery-powered and energy-conscious designs. Key features include the 48 MHz ARM Cortex-M4 core with a 32-bit RISC architecture, 256KB (256K x 8) of flash program memory for code and data storage, and 32KB of SRAM for runtime variables and buffers. The SAM4L series integrates peripherals such as segment LCD controllers, hardware capacitive touch (QTouch), USB device and embedded host, 128-bit AES encryption, and audio interfaces, plus high-speed serial peripherals including USART, SPI, and I2C, according to the Atmel SAM4L datasheet summary. Technically, the Peripheral Event System and SleepWalking features allow peripherals to communicate directly with each other and wake selectively from low-power sleep states without CPU intervention, a hallmark of the SAM4L low-power design philosophy. Industrial temperature rating supports operation in harsh environments. Typical applications include battery-powered sensor nodes, consumer and industrial devices with segment LCD displays, capacitive-touch control panels, and secure connected devices leveraging the embedded AES engine. A key design consideration is that this member of the family carries 256KB flash and 32KB SRAM; if code size grows, the pin-compatible denser variants within the SAM4L family should be evaluated at board design time. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.

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ATSAM4LC4AA-MUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4LC4AA-MUR

ATSAM4LC4AA-MUR - 48MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4LC4AA-MUR is a 32-bit ARM Cortex-M4 flash microcontroller running at 48 MHz with 256KB Flash, 32KB SRAM, and 1.68V to 3.6V supply operation, housed in a 48-pin QFN (7x7 mm) package with exposed pad. A member of the SAM4L family, it delivers the lowest active-mode power in its class at 90 uA/MHz, 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. Within the power/performance hierarchy, the SAM4L sits in the ultra-low-power ARM Cortex-M class, positioned above 8-bit MCUs and beside Cortex-M0+/M3 devices that trade efficiency for DSP throughput. The Cortex-M4 core adds hardware DSP instructions and single-cycle MAC, making the SAM4L suitable for signal-processing edge nodes. Key features include the 90 uA/MHz active current and 1.5 uA sleep current that define battery-powered design budgets, hardware AES and a general-purpose crypto accelerator for secure IoT, a flexible event system that routes peripheral-to-peripheral triggers without CPU intervention, and 12-bit ADC/DAC plus analog comparators for measurement tasks. The SCIF (system control interface) provides multiple power-saving modes including backup mode for years-long coin-cell operation. Architecturally, the SAM4L uses a Cortex-M4 core with MPU and NVIC, a multi-layer bus matrix (HMATRIX), and a Peripheral Event System (PEVC) that decouples low-latency sensor reactions from software latency. Flash uses a dual-bank, picoPower technology architecture supporting safe in-application programming. The integrated asynchronous and synchronous timers, USARTs, TWI (I2C), SPI, and USB device peripheral cover most embedded connectivity needs. Typical applications include battery-powered sensor nodes and metering, portable medical and industrial data loggers, and low-power consumer devices requiring cryptographic authentication such as secure accessories and IoT endpoints. The 48 MHz DSP-capable core also fits vibration and acoustic sensing front ends. Design consideration: minimize dynamic power by running from the internal RC oscillator at lower frequencies during idle periods and using the PEVC so peripherals wake the CPU only when data is ready; budget VDDCORE decoupling per the datasheet power application notes. This page synthesizes verified distributor listings, ultra-low-power SAM4L design context, drop-in family alternatives, and practical design notes not consolidated on any single datasheet page.

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ATSAM4LC4BA-AU - 48MHz Cortex-M4 256KB MCU | Microchip
ATSAM4LC4BA-AU

ATSAM4LC4BA-AU - 48MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4LC4BA-AU is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 48 MHz, with 256KB of embedded flash and 32KB of SRAM, housed in a 64-pin TQFP (10x10 mm) package for industrial temperature ranges. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals into one package, sitting at the lowest level of the embedded-system hierarchy: semiconductor -> integrated circuit -> processor -> microcontroller unit (MCU). The SAM4L family is Microchip's ultra-low-power Cortex-M4 line, designed for battery-operated and energy-harvesting systems where every microamp matters. The defining feature of the ATSAM4LC4BA-AU is power efficiency: it delivers 90 uA/MHz in active mode, 1.5 uA in sleep mode, and the shortest wake-up time in a Cortex-M4-based device, down to 1.5 us. The device also integrates advanced crypto support and a secure boot feature (per the Mouser product listing), which protect firmware and sensitive data in connected designs. Architecturally, the Cortex-M4 core with a 3-stage pipeline executes ARM Thumb-2 code with DSP-oriented instructions, while the flexible event system and multiple sleep modes let designers shut down unused domains. Supply operation spans 1.8 V to 3.3 V, allowing direct battery or Li-ion rail operation without an intermediate regulator. The 64-pin TQFP with 0.5 mm pitch offers a good balance of GPIO count and hand-solderable, inspectable leads for prototyping. Typical applications include battery-powered sensor nodes and IoT end devices, portable medical and metering products, and low-power industrial control where cryptographic key storage and fast wake-up from deep sleep are required. Design consideration: exploit the SAM4L's hierarchical sleep modes and the event system so peripherals can operate while the CPU sleeps; waking at only 1.5 us means polling loops can often be replaced by sleep-wait cycles for major energy savings. This page adds value beyond the manufacturer datasheet by consolidating drop-in family alternatives, application-specific pairing suggestions, and distributor pricing context in one engineer-focused reference.

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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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