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ATSAM4S2BA-AU - Cortex-M4 120MHz 128KB MCU | Microchip
ATSAM4S2BA-AU

ATSAM4S2BA-AU - Cortex-M4 120MHz 128KB MCU | Microchip

The Microchip Technology ATSAM4S2BA-AU is a 32-bit ARM Cortex-M4 microcontroller with a floating point unit, running at up to 120 MHz, integrating 128 KB of single-cycle flash memory and 64 KB of SRAM in a 64-pin LQFP (10x10 mm) surface-mount package. A 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 IC and embedded-system hierarchy, the ATSAM4S2BA-AU belongs to the SAM4S family of ARM-based flash MCUs, positioned above entry-level Cortex-M0+ devices and below high-integration SAM4E parts, serving general-purpose embedded control and connectivity nodes. Key features include 1.62V to 3.6V single-supply operation, a single-precision hardware FPU and DSP instructions for efficient signal processing, and a low power consumption profile of approximately 180 uA/MHz. On-chip peripherals cover 2x USART, 2x TWI (I2C), SPI, USB 2.0 full-speed device port, SSC for I2S audio, a 12-bit 2 Msps ADC, 12-bit DAC, PWM channels, HSMCI for SD/MMC cards, DMA, RTC, and watchdog timers, providing broad system integration without external components. The Cortex-M4 core executes from flash with 0-wait-state access up to certain speeds via an accelerator (CMCC cache controller), while the flash accelerator sustains near-peak performance at 120 MHz. A multi-layer bus matrix with peripheral DMA channels keeps CPU load low during high-throughput data transfers, and nested vectored interrupt control delivers deterministic real-time response. Typical applications include industrial control nodes, consumer appliances, USB-connected instruments, SD-card data loggers, and audio/accessory devices where the SSC and I2S path plus FPU acceleration fit well. Design consideration: validate VDDCORE/VCORE external regulation and decoupling per the SAM4S datasheet; the LQFP-64 footprint is pin-compatible with SAM4N, SAM3S, SAM3N, and SAM7S 64-pin devices, enabling memory-size scalability. This page synthesizes distributor pricing, pin-compatible upgrade alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S2BA-MU - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4S2BA-MU

ATSAM4S2BA-MU - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4S2BA-MU is a 32-bit ARM Cortex-M4 microcontroller running at 120 MHz with 128 KB embedded flash and 64 KB SRAM, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, non-volatile program memory, RAM, and a rich set of peripherals on one die. Within the hierarchy of embedded processors, the SAM4S sits between entry-level Cortex-M0+/M3 MCUs and high-performance Cortex-M7 devices, making it a general-purpose workhorse for industrial control and consumer products. Key features include the Cortex-M4 core with DSP instructions and a hardware floating-point unit (FPU) for efficient single-precision math, a maximum operating frequency of 120 MHz, and low-power operation of 180 uA/MHz as cited on the Microchip product page. The supply range of 1.62V to 3.6V supports both 3.3V industrial rails and battery operation. Peripheral set of the SAM4S family typically includes USB 2.0 device, multiple USARTs, SPI, TWI (I2C), an ADC, and a PWM controller. Technically, the SAM4S implements an ARMv7E-M architecture with Harvard bus structure, a multi-layer bus matrix, and flash accelerators that keep the core fed at 120 MHz from zero-wait-state flash bursts. Per the Microchip SAM4S family datasheet (document 60001419B), the series is pin-to-pin compatible with SAM4N, SAM3S, SAM3N, and legacy SAM7S devices in the 64-pin version, enabling easy in-portfolio migration. Typical applications include industrial automation nodes, motor control and PWM-driven power stages, metering systems, USB-attached accessories, and IoT sensor gateways. The 120 MHz core with FPU suits control loops and digital filtering in compact designs. A key design consideration: connect all VDDIO/VDDCORE and GND pins, and decouple each supply pin with 100 nF ceramics close to the exposed pad, which doubles as the thermal and ground anchor. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S2BB-ANR - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4S2BB-ANR

ATSAM4S2BB-ANR - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4S2BB-ANR is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 128 KB of embedded Flash and 64 KB of SRAM, housed in a 64-pin LQFP (10 x 10 mm) industrial-temperature package. It operates from a 1.62 V to 3.6 V single supply and achieves a low-power consumption of 180 uA in backup mode. A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals such as UART, SPI, I2C, ADC, timers, and USB. Within the power-management hierarchy of embedded systems, an MCU replaces multi-chip processor-plus-peripheral solutions and sits below application processors in complexity. The SAM4S series belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, positioned for cost-sensitive industrial and consumer control applications. Key differentiating features include DSP instructions and a Thumb-2 instruction set on the Cortex-M4 core, a Memory Protection Unit (MPU), Flash with ECC, Security Bit and Lock Bits for code protection, and a full-speed USB Device port with embedded transceiver. The Flash accelerator with cache sustains near-zero-wait-state execution at 120 MHz. Technically, the SAM4S2B combines the Cortex-M4 pipeline with a multi-layer bus matrix and peripheral DMA (PDC) channels, allowing USART, SPI and ADC transfers without CPU intervention. Peripherals include up to 2 UARTs/USARTs, SPI, TWI (I2C), 2-channel 12-bit ADC, PWM channels, and a real-time clock with battery backup domain. The series is pin-to-pin compatible with the SAM3N, SAM3S, SAM4N and legacy SAM7S devices in 48-, 64- and 100-pin versions, providing a migration path for Flash-size and feature upgrades without PCB redesign. Typical applications include industrial control and automation nodes, consumer appliances, metering systems, motor control with PWM peripherals, and USB-connected embedded devices. The 180 uA backup-mode consumption suits battery-backed metering, while the DSP instructions accelerate filtering and control-loop algorithms. Design consideration: the 1.62 V to 3.6 V supply requires a stable 3.3 V rail with proper VDDCORE/VDDOUT decoupling per the regulator architecture; use the ERASE pin carefully to avoid accidental Flash bulk erase during production. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S2BB-MN - 120MHz Cortex-M4 128KB Flash MCU | Microchip
ATSAM4S2BB-MN

ATSAM4S2BB-MN - 120MHz Cortex-M4 128KB Flash MCU | Microchip

The Microchip Technology ATSAM4S2BB-MN is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz, integrating 128 KB of ECC-protected embedded Flash and 64 KB of SRAM in a 64-pin QFN (9x9 mm) package with exposed pad, supplied over a 1.62V to 3.6V range. A microcontroller (MCU) is a compact integrated circuit that governs specific operations in embedded systems, combining a processor core, memory, and programmable peripherals on one die. The ARM Cortex-M4 is a 32-bit RISC core with a hardware FPU and DSP instructions; the SAM4S series belongs to Microchip's SAM4 family of low-power, high-performance ARM flash MCUs, sitting above the Cortex-M0+ SAM D/L series and beside the SAM4E/Ethernet-equipped parts. Key features include a 120 MHz maximum core clock, 128 KB Flash with ECC, security bit and lock bits, 180 uA low-power mode consumption, an MPU (Memory Protection Unit), and a rich peripheral set spanning multiple UARTs, SPI, I2C/TWI, USB, and a 12-bit ADC. Flash ECC corrects single-bit errors, improving data integrity in industrial and medical equipment. Architecturally, the Cortex-M4 pipeline delivers approximately 1.25 DMIPS/MHz-class performance with Thumb-2 code density, and an internal voltage regulator generates the stable core supply from the 1.62V-3.6V external rail. The device is pin-to-pin compatible with SAM3S, SAM4N, and SAM7S legacy MCUs in the 64-pin version, enabling migration without PCB rework. Typical applications include industrial control systems, medical diagnostics, consumer electronics, and IoT endpoints requiring real-time DSP processing, USB connectivity, and battery efficiency. Design consideration: decouple all power pins with 100 nF capacitors placed close to the die and solder the exposed pad to the PCB thermal pad for heat dissipation. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet. Pricing data reflects distributor listings as of 2026-09-20.

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ATSAM4S2BB-MNR - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4S2BB-MNR

ATSAM4S2BB-MNR - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4S2BB-MNR is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 128KB of embedded Flash and 64KB of SRAM, housed in a 64-pin VQFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, serving as the computational heart of embedded systems. Within the power-management hierarchy of an embedded design, the SAM4S family occupies the mid-to-high performance tier of Microchip's ARM-based MCU portfolio, sitting above the SAM3N/SAM3S Cortex-M3 series and offering DSP instructions and a Memory Protection Unit (MPU) inherited from the Cortex-M4 core. Key features include the Thumb-2 instruction set with hardware DSP instructions for efficient signal processing, ECC-protected Flash with Security Bit and Lock Bits for code integrity, and a low-power profile of approximately 180 uA in typical low-power operation with a 1.62V to 3.6V supply range. The -MNR ordering code denotes the industrial/extended-temperature, green (halogen-free) QFN package in Tape & Reel packaging. Architecturally, the Cortex-M4 core at 120 MHz delivers 1.25 DMIPS/MHz-class performance, and the device integrates a rich peripheral set typical of the SAM4S family, including USB, USART, SPI, TWI, ADC, and PWM channels, enabling single-chip designs for control and connectivity tasks. Typical applications include industrial control and automation nodes, consumer appliances, motor control systems, and general-purpose embedded products that require 32-bit performance with deterministic real-time behavior. When designing with this device, budget the 1.62V to 3.6V supply rail carefully and follow the reference manual for Flash ECC and security-bit configuration, since these options affect field reliability and firmware update strategy. This page synthesizes distributor availability, pin-compatible SAM4S/SAM3S drop-in alternatives, and practical design notes not found on the manufacturer product page.

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ATSAM4S2BB-UUR - 120MHz Cortex-M4 MCU, 128KB Flash, 64-WLCSP | Microchip
ATSAM4S2BB-UUR

ATSAM4S2BB-UUR - 120MHz Cortex-M4 MCU, 128KB Flash, 64-WLCSP | Microchip

The Microchip Technology ATSAM4S2BB-UUR is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz, with 128 KB of embedded Flash and 64 KB of SRAM, housed in a 64-ball WLCSP (UFBGA) package measuring just 3.32 x 3.32 mm. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, memory, and peripherals on one die, forming the lowest layer of the embedded systems hierarchy (MCU -> embedded processor -> semiconductor). The SAM4S family is Microchip's (formerly Atmel) mid-range ARM-based flash MCU line, positioned for cost-sensitive applications that still need 32-bit performance and DSP capability. Key features of the ATSAM4S2BB include the Cortex-M4 core with DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU), embedded Flash with ECC and Security Bit plus Lock Bits, and a supply range of 1.62 V to 3.6 V. Power consumption is approximately 180 uA/MHz class, supporting battery-operated designs. Technically, the Cortex-M4 pipeline combined with hardware DSP instructions enables efficient fixed-point signal processing (filters, FFTs) without a separate DSP. The ECC-protected Flash improves reliability in industrial environments, and lock bits support IP protection. Typical applications include wearable and portable devices (the 3.32 x 3.32 mm WLCSP is ideal for ultra-compact PCBs), industrial sensors and control nodes, and IoT edge devices. Design consideration: WLCSP ball-grid packages require controlled-impedance PCB layout with via-in-pad or escape routing, so verify your fab supports 0.4 mm-pitch-class micro-BGA assembly before committing to the footprint. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S2CA-AU - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip
ATSAM4S2CA-AU

ATSAM4S2CA-AU - 120MHz Cortex-M4 MCU, 128KB Flash | Microchip

The Microchip Technology ATSAM4S2CA-AU is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 120 MHz, with 128 KB (128K x 8) of Flash program memory and 64 KB of SRAM, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. A microcontroller (MCU) integrates a processor core, memory, and peripherals onto a single chip, forming the heart of an embedded system. Within the power management hierarchy of embedded design, MCUs such as the SAM4S sit above discrete logic and below application processors, offering real-time deterministic control. The SAM4S series belongs to Microchip's (formerly Atmel) SMART ARM-based MCU portfolio, positioned for industrial and consumer embedded applications. Key features include the ARM Cortex-M4 RISC core with DSP extension instructions and hardware FPA, full-speed USB Device port, EBI/EMI external bus interface, and connectivity peripherals spanning I2C, SPI, UART/USART, IrDA, SSC, and memory-card interfaces. On-chip peripherals include DMA, PWM, brown-out detect/reset, power-on reset, and a watchdog timer, with 79 general-purpose I/O pins. The Cortex-M4 architecture at 120 MHz delivers approximately 1.25 DMIPS/MHz core performance, enabling single-cycle MAC and saturating arithmetic for digital filtering and control loops. According to the Microchip SAM4S family datasheet, the series offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices, facilitating migration across memory densities. Typical applications include industrial control and factory automation, consumer appliances, USB-connected devices, and motor control systems where DSP capability and rich connectivity are required. Design consideration: ensure the 1.62V-3.6V supply rail is well decoupled, and confirm that 128 KB Flash / 64 KB SRAM capacity covers firmware growth before finalizing the footprint; pin-compatible higher-density SAM4S parts allow later upgrades. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S2CA-CFU - 120MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4S2CA-CFU

ATSAM4S2CA-CFU - 120MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4S2CA-CFU is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz, with 128 KB of embedded Flash and 64 KB of SRAM, housed in a 100-ball VFBGA (7x7 mm) package for compact surface-mount designs. A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single chip, forming the compute layer of embedded systems. Within the hierarchy, the SAM4S sits in the 32-bit ARM-based MCU family, above 8-bit MCUs like the PIC16 series and below high-end application processors. The ARM Cortex-M4 core adds a hardware FPU, DSP instructions, and the Thumb-2 instruction set, while the integrated Memory Protection Unit (MPU) supports robust, fault-isolated firmware architectures. Key features of the ATSAM4S2CA-CFU include the 120 MHz Cortex-M4 with DSP extensions for real-time signal processing, 128 KB Flash with ECC (error-correcting code), Security Bit and Lock Bits for code protection, and industrial temperature operation (-40C to +85C), matching the GREEN IND TEMP MRL A classification listed by Mouser. Architecturally, the device combines the Cortex-M4 pipeline with a multi-layer bus matrix, enabling parallel access to Flash, SRAM, and peripherals. Flash ECC improves reliability in safety-conscious and high-vibration environments. The 100-ball VFBGA footprint with a 0.8 mm ball pitch saves board area versus 100-pin LQFP equivalents, at the cost of more demanding PCB assembly (BGA reflow and X-ray inspection). Typical applications include industrial control and automation nodes, consumer and portable devices, motor control and power conversion, and IoT gateways where DSP instruction throughput accelerates filtering and FFT workloads. Design consideration: BGA packages require careful PCB fanout, controlled soldering profiles, and cannot be hand-reworked easily; confirm your assembly capability before committing to the -CFU VFBGA variant over the pin-compatible LQFP (-AU) versions. This page synthesizes distributor pricing from Mouser, DigiKey, LCSC and Heisener, drop-in migration options within the Microchip SAM portfolio, and practical design notes not found in the manufacturer datasheet. Pricing references are as of 2026-09-20.

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ATSAM4S2CB-ANR - 120MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4S2CB-ANR

ATSAM4S2CB-ANR - 120MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4S2CB-ANR is a 32-bit ARM Cortex-M4 flash microcontroller from the SAM4S family, running at up to 120 MHz with 128 KB of single-voltage flash memory and 64 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) industrial-temperature package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, sitting within the broader hierarchy of embedded processors: Cortex-M4 core -> ARM RISC MCU -> system-on-chip -> embedded control system. MCUs are the workhorses of industrial control, consumer devices, and IoT nodes, where deterministic real-time behavior and low power matter more than raw throughput. Key features of the ATSAM4S2CB-ANR include the Cortex-M4 core with hardware FPU-free DSP instructions (single-cycle MAC, SIMD), a full-speed USB Device port with embedded transceiver, supply operation from 1.62V to 3.6V, and low active power consumption cited by Microchip at approximately 180 uA per MHz. The device operates across the industrial temperature range with gull-wing terminals on a square LFQFP body. Technically, the SAM4S series implements a three-stage Harvard pipeline with an ARMv7E-M architecture, optional cache, and dual-bank flash implementation across the family (up to 2048 KB on larger variants), enabling safe in-application firmware updates. The peripheral set includes USART, SPI, TWI (I2C), PWM channels, a 12-bit ADC, and a hardware AES/GHASH cryptographic engine on select family members, allowing the same board design to scale flash density from 128 KB to 2 MB without PCB changes. Typical applications include industrial automation and motor control nodes, consumer and appliance interfaces, USB-equipped instrumentation and sensor bridges, and low-power embedded systems that need Cortex-M4 DSP performance with a long-lived, pin-compatible upgrade path. When designing with this part, note that at 120 MHz flash wait states are significant, so performance-critical code should be relocated to SRAM or the flash cache enabled; also plan VDDCORE and VDDIO decoupling per the datasheet. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single verified reference point.

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ATSAM4S2CB-CNR - 120MHz Cortex-M4 MCU 128KB Flash | Microchip
ATSAM4S2CB-CNR

ATSAM4S2CB-CNR - 120MHz Cortex-M4 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM4S2CB-CNR is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz, with 128 KB of embedded Flash memory and 64 KB of SRAM, housed in a 100-ball TFBGA (9x9 mm) package. As a member of the SAM4S family, it integrates a single-core Cortex-M4 processor with hardware floating-point support and a rich peripheral set for embedded control applications. A microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, non-volatile program memory, RAM, and input/output peripherals. Within the embedded systems hierarchy, the SAM4S series sits in the high-performance 32-bit ARM-based MCU class, positioned above 8-bit and entry 32-bit devices and below multi-core application processors. Key features of the ATSAM4S2CB-CNR include the 120 MHz Cortex-M4 core with DSP instructions and single-cycle MAC, 128 KB Flash for program storage, 64 KB SRAM for data buffering, and extended industrial temperature operation to 105 degrees C as indicated by the CNR ordering suffix. The device is manufactured in a green, RoHS-aware process and supplied in tape and reel (MRL B) format for automated assembly. The SAM4S architecture provides a multi-layer bus matrix, DMA-capable peripherals, and a flexible clock controller, allowing deterministic real-time behavior in control loops and communication bridges. The Cortex-M4 core enables efficient execution of control algorithms and signal-processing tasks such as filtering and FFTs that would burden smaller cores. Typical applications include industrial automation nodes, motor control and power conversion interfaces, data loggers, IoT sensor gateways, and embedded communication modules where 120 MHz processing headroom and 105 C extended temperature tolerance are required. A key design consideration is BGA package assembly: the 9x9 mm 100-ball TFBGA footprint requires fine-pitch PCB fabrication and reflow inspection capability, so confirm your manufacturing process supports 0.8 mm-class BGA pitches before committing to this package variant. This page synthesizes distributor pricing, drop-in family alternatives, design notes, and application guidance not consolidated in the manufacturer datasheet alone.

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ATSAM4S4AA-AN - 120MHz ARM Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4AA-AN

ATSAM4S4AA-AN - 120MHz ARM Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4AA-AN is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 256 KB of embedded flash and 64 KB of SRAM, housed in a 48-pin LQFP (AN) surface-mount package. A 32-bit microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single die, sitting at the heart of embedded system hierarchy: Cortex-M4 core -> ARM MCU -> embedded controller -> semiconductor device. The SAM4S family belongs to Atmel/Microchip's ARM-based smart ARM-based (SAM) portfolio, positioned for cost-sensitive, high-performance embedded control where deterministic real-time response and low power consumption are required. Key features include a maximum operating frequency of 120 MHz with single-cycle MAC and hardware floating-point support from the Cortex-M4 core, 256 KB of flash program memory, and 64 KB of SRAM. Supply voltage spans 1.62V to 3.6V, and power consumption of 180 uA (per Microchip product page operating mode) makes it suitable for battery-powered designs. Peripherals include brown-out detect/reset, DMA, power-on reset, PWM, and a watchdog timer. Connectivity is comprehensive: I2C, IrDA, memory card (SD/MMC), SPI, SSC (synchronous serial controller), UART/USART, and USB, enabling designs spanning industrial communications, human-machine interfaces, and peripheral bridging. The Cortex-M4 DSP extensions accelerate control loops and filtering algorithms common in motor control and digital power. Typical applications include industrial automation controllers, consumer appliances, IoT sensor nodes, and motor control systems requiring a 120 MHz core with USB and serial connectivity in a compact 48-pin footprint. Design consideration: the part is listed with part status Obsolete, so new designs should plan migration to active SAM4S variants; the SAM4S series offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices for in-portfolio migration. This page synthesizes distributor stock data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S4AA-AU - Cortex-M4 120MHz MCU 256KB Flash | Microchip
ATSAM4S4AA-AU

ATSAM4S4AA-AU - Cortex-M4 120MHz MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4AA-AU is a 32-bit flash microcontroller based on the ARM Cortex-M4 core, running at up to 120 MHz with 256KB of embedded flash and 64KB of SRAM, housed in a 48-pin LQFP (7x7 mm) package rated for the industrial temperature range. A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single chip, sitting at the center of embedded system hierarchies that span from simple 8-bit controllers to application processors. The SAM4S family belongs to Microchip's SMART ARM-based MCU portfolio, positioned for mid-range embedded control, connectivity, and signal-processing tasks where a Cortex-M4 with hardware DSP instructions and a single-cycle MAC accelerates math-intensive firmware. Key features of the ATSAM4S4AA-AU include the 120 MHz Cortex-M4 core with FPU-free DSP extensions, 256KB flash with dual dual-plane architecture supporting concurrent read-write operation, and a supply range of 1.62V to 3.6V. According to Microchip product data, the SAM4S4A achieves low active power consumption of approximately 180 uA/MHz class efficiency with multiple sleep, wait, and backup modes for battery-operated designs. The device architecture pairs the core with a bus matrix, a 12-channel DMA controller, and a rich peripheral set typical of the SAM4S family: UART/USART, SPI, I2C (TWI), I2S, ADC, DAC, PWM channels, and an external bus interface. Pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices, documented in the SAM4S family datasheet (60001419B), enables straightforward migration across memory and peripheral density options. Typical applications include industrial control panels, motor control and power monitoring nodes, building automation sensors, consumer appliances, and test equipment front-ends. The 48-pin LQFP footprint with up to 38 GPIO suits compact boards that need USB-class performance without BGA assembly cost. Design considerations: reserve flash headroom of at least 20% for OTA firmware updates, and validate 1.8V versus 3.3V I/O signaling against the 1.62V-3.6V supply window. The AU suffix denotes industrial temperature (typically -40C to +85C) and lead-free, RoHS-compliant green packaging in tray format. This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4S4AA-MU - 120MHz Cortex-M4, 256KB MCU | Microchip
ATSAM4S4AA-MU

ATSAM4S4AA-MU - 120MHz Cortex-M4, 256KB MCU | Microchip

The Microchip Technology ATSAM4S4AA-MU is a 32-bit ARM Cortex-M4 microcontroller with FPU operating at up to 120 MHz, integrating 256KB of single-cycle flash memory and 64KB of SRAM in a 48-pin QFN (7x7 mm) exposed-pad package. It runs from a 1.62V to 3.6V supply and integrates an 8-channel 12-bit ADC, making it suitable for mixed-signal embedded systems. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip. Within the semiconductor hierarchy, the SAM4S sits in the 32-bit flash MCU family, part of the broader ARM Cortex-M ecosystem that spans everything from low-power sensor nodes to industrial control boards. Microchip acquired Atmel in 2016, so the SAM4S series datasheets are published under the Microchip Technology name. Key differentiating features of the ATSAM4S4AA-MU include the Cortex-M4 core with hardware DSP instructions and single-precision FPU, a maximum clock speed of 120 MHz, 256KB of in-system-programmable flash, and low-power operation as low as 180 uA in backup-related modes per the Microchip product page. The device also provides standard SAM4S peripherals such as UART/USART, SPI, TWI (I2C), PWM channels, and DMA for offloading data movement from the CPU. Architecturally, the SAM4S series is based on the ARMv7E-M Cortex-M4 core with a Harvard bus structure, providing deterministic single-cycle flash access with cache/accelerator layers that sustain full-speed execution at 120 MHz. The Cortex-M4 DSP extension accelerates MAC and SIMD operations useful in motor control, digital filtering, and sensor fusion workloads. Typical applications include industrial automation nodes, motor control, consumer appliances, IoT sensor gateways, and portable battery-powered instruments, where the combination of 256KB flash and a 12-bit ADC reduces external component count. The SAM4S series offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices, easing memory and performance migration. When designing with this MCU, budget the flash for bootloader plus application and verify that 64KB SRAM is sufficient for DMA buffers and stacks; for heavier DSP workloads consider the FPU-enabled build options. This page synthesizes distributor pricing, pin-compatible alternatives, and design guidance not found in the manufacturer datasheet alone.

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ATSAM4S4AB-AN - Cortex-M4 120MHz 256KB MCU | Microchip
ATSAM4S4AB-AN

ATSAM4S4AB-AN - Cortex-M4 120MHz 256KB MCU | Microchip

The Microchip Technology ATSAM4S4AB-AN is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 256KB (256K x 8) of embedded Flash memory, housed in a 48-pin LQFP (7x7 mm) surface-mount package rated for the industrial temperature range of -40C to +105C. It belongs to the SAM4S family of high-performance, low-power MCUs from Microchip (formerly Atmel). A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data RAM, and a rich set of peripherals into one chip, forming the backbone of embedded systems. Within the voltage-regulator-like hierarchy of embedded components, the SAM4S sits at the mid-to-high tier of Microchip's ARM-based MCU portfolio, positioned above the Cortex-M0+ SAMD series and pin-compatible with the SAM7S, SAM3N, SAM3S, and SAM4N families, enabling straightforward migration between price/performance points. Key features of the ATSAM4S4AB-AN include the 120 MHz Cortex-M4 core with DSP instructions, 256KB of Flash program memory, on-chip connectivity peripherals (I2C/TWI, SPI, UART/USART, SSC, USB 2.0 device, IrDA, and memory-card interfaces), and system peripherals such as DMA, PWM, watchdog timer (WDT), brown-out detect/reset, and power-on reset (POR). The device provides 34 general-purpose I/O pins in the 48-LQFP footprint. Architecturally, the Cortex-M4 core features a 3-stage pipeline and single-cycle MAC, giving efficient signal-processing capability for motor control and digital filtering. The Flash accelerator minimizes wait-state penalties at full 120 MHz operation, while the multi-layer bus matrix and DMA allow peripherals to move data without core intervention, reducing real-time latency. Typical applications include industrial automation and control nodes, consumer appliances, USB-connected instrumentation, and motor-control or touch-sensing systems using Microchip QTouch technology, which is natively supported by the SAM4S peripheral set. A key design consideration is power budgeting: at 120 MHz, active current is substantially higher than in low-speed sleep modes, so designers should exploit the SAM4S sleep, wait, and backup modes to hit energy targets in battery-powered designs. This page synthesizes distributor pricing, drop-in same-family alternatives, application guidance, and design notes not found in the manufacturer datasheet.

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ATSAM4S4AB-ANR - 120MHz Cortex-M4 256KB MCU | Microchip
ATSAM4S4AB-ANR

ATSAM4S4AB-ANR - 120MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4S4AB-ANR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 120 MHz with 256 KB of embedded flash and 64 KB of SRAM, housed in a 48-pin LQFP (7x7 mm) surface-mount package on tape and reel. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die, sitting within the broader hierarchy of embedded processors beneath MPUs and application processors. The SAM4S family belongs to Microchip (formerly Atmel) ARM-based flash MCUs, positioned for cost-sensitive embedded control where a 32-bit core, DSP instructions, and a rich peripheral set are required in a small footprint. Key features include the Cortex-M4 core with DSP extension and a single-cycle hardware multiplier/floating-point capable instruction set, 120 MHz maximum CPU frequency, 256 KB (256K x 8) of flash memory for code storage, and an industrial temperature grade of -40C to +105C. The device operates from a single supply in the 1.62V to 3.6V range with a nominal 3.3V rail. The SAM4S architecture provides an extensive peripheral set for connectivity, system control, and analog interfacing, including UART/USART serial channels, SPI, TWI (I2C), timers, PWM, an ADC, and a DMA controller for data movement without CPU intervention. Native support for Microchip QTouch capacitive touch technology enables buttons, sliders, and wheels without external components. Per the SAM4S family product page, the family is pin-to-pin compatible with Microchip SAM7S, SAM3N, SAM4N, and SAM3S MCUs, simplifying migration across memory and performance tiers within the same PCB footprint. Typical applications include industrial automation and control nodes, consumer and IoT devices with capacitive touch interfaces, motor control and power conversion, and embedded connectivity bridges where a 120 MHz 32-bit core with DMA-accelerated serial transfers is beneficial. When designing with this device, budget the flash for bootloader plus application and consider the pin-compatible larger-memory SAM4S variants for upgrade headroom. Follow Microchip layout guidance for decoupling and VDDIO/VDDCORE domains. This page synthesizes verified distributor pricing, drop-in alternatives within the pin-compatible SAM4S/SAM3S ecosystem, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S4AB-MN - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4AB-MN

ATSAM4S4AB-MN - 120MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4AB-MN is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 120 MHz, with 256 KB of embedded flash memory and 64 KB of SRAM, housed in a 48-pin QFN (7x7 mm) exposed-pad package rated from -40C to +105C. A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single chip, sitting at the device level of the embedded-systems hierarchy: integrated circuit -> microcontroller -> embedded control system. The SAM4S series belongs to Microchip's (formerly Atmel) SMART ARM-based MCU family, positioned for cost-sensitive, high-performance embedded control. Key features include the ARM Cortex-M4 core with DSP instructions and a single-cycle hardware MAC, a full-speed USB 2.0 Device port with embedded transceiver, a 12-bit ADC, and pin-to-pin compatibility with the SAM7S, SAM3S, SAM3N, and SAM4N MCU families. The device operates from a single 1.62V to 3.6V supply and supports Microchip QTouch capacitive touch technology natively. Technically, the SAM4S integrates a flash accelerator and optional cache to sustain near-zero-wait-state execution at 120 MHz, plus a rich peripheral set covering UART/USART, SPI, TWI (I2C), PWM timers, and a real-time clock, enabling connectivity, system control, and analog interfacing in one chip. Typical applications include industrial automation nodes, consumer appliances, motor control, USB-enabled sensing devices, and capacitive-touch human-machine interfaces where 120 MHz headroom and flash density up to 256 KB are required. Design consideration: the 48-QFN exposed pad must be soldered to a grounded copper pour for thermal dissipation and signal integrity; plan decoupling capacitors on all VDDIO/VDDCORE pairs per the datasheet power scheme. This page synthesizes verified distributor pricing, drop-in SAM4S family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4S4BA-AU - 120MHz Cortex-M4 256KB MCU | Microchip
ATSAM4S4BA-AU

ATSAM4S4BA-AU - 120MHz Cortex-M4 256KB MCU | Microchip

The Microchip Technology ATSAM4S4BA-AU is a 32-bit ARM Cortex-M4 microcontroller rated up to 120 MHz, with 256 KB of embedded Flash, 64 KB of SRAM, and a 64-pin LQFP package measuring 10 x 10 mm. The supplied distributor record identifies the device as a SAM4S microcontroller with 1.2 V and 3.3 V supply references, making it suitable for embedded control systems requiring a high-performance 32-bit core and substantial local memory. A microcontroller is a programmable system-on-chip that integrates a processor core, nonvolatile program memory, volatile working memory, and peripherals such as serial interfaces, timers, and analog or digital I/O. The ATSAM4S4BA belongs to Microchip's SAM4S family, placing it in the embedded-processing hierarchy of ARM Cortex-M4 MCU, 32-bit microcontroller, embedded controller, and semiconductor. The verified feature set includes an ARM Cortex-M4 processor operating up to 120 MHz, a Memory Protection Unit, DSP instructions, and the Thumb-2 instruction set. Its 256 KB Flash provides program storage, while 64 KB of SRAM supports data and execution. The Flash is described as embedded and ECC-enabled, with security and lock bits. These characteristics support firmware-heavy control, signal processing, communications, and general industrial applications. SAM4S devices also feature a dual-bank Flash architecture according to the Microchip product result. Dual-bank support can improve field-update flexibility by permitting organized flash-management strategies, but project engineers must follow the manufacturer's programming and bootloader procedures rather than assume unrestricted simultaneous execution. Typical uses include industrial automation controllers, connected embedded equipment, motor and motion-control systems, industrial communications, and compact data-acquisition platforms. The 120 MHz Cortex-M4 core and DSP capability are particularly useful when control-loop timing and fixed-point signal processing must coexist with communications firmware. Design planning should begin with the exact 64-pin LQFP footprint, supported power architecture, clock configuration, and peripheral pin multiplexing. Because the provided web results do not expose a complete pin table or individual I/O specifications, those details must be confirmed in the manufacturer datasheet before PCB routing or firmware resource assignment. This page consolidates verified distributor specifications, package information, sourcing links, and design-oriented guidance. It also separates confirmed data from unavailable parameters, allowing engineers to assess the ATSAM4S4BA-AU quickly while preserving traceability to the manufacturer and distributor records retrieved on 2026-10-23.

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ATSAM4S4BA-UUR - 120MHz Cortex-M4 MCU 256KB Flash WLCSP-64
ATSAM4S4BA-UUR

ATSAM4S4BA-UUR - 120MHz Cortex-M4 MCU 256KB Flash WLCSP-64

The Microchip Technology ATSAM4S4BA-UUR is a 32-bit ARM Cortex-M4 flash microcontroller running at up to 120 MHz, with 256 Kbytes of embedded Flash (with ECC, Security Bit and Lock Bits) and 64 Kbytes of SRAM, housed in a 64-ball WLCSP (Wafer-Level Chip-Scale Package) supplied on Tape & Reel. A microcontroller (MCU) is a single-chip integrated circuit combining a processor core, memory, and peripherals to form a complete embedded control system. Within the MCU hierarchy, the SAM4S family sits in the general-purpose 32-bit flash MCU class, and belongs to the ARM Cortex-M architecture lineage: Cortex-M4 -> ARMv7E-M -> 32-bit RISC microcontroller -> system-on-chip. Key features include the Cortex-M4 core with hardware DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU), dual-bank Flash enabling safe in-application programming, and a supply range of 1.62V to 3.6V (nominal 1.2V/3.3V system operation). The WLCSPGREEN package is RoHS-green, making the device well suited to extreme miniaturization where board area is the dominant constraint. Technically, the ATSAM4S4BA-UUR integrates a 12-bit ADC, UART, SPI and TWI serial interfaces typical of the SAM4S family, and benefits from Microchip's peripheral set including DMA channels for low CPU-load data movement. Pin-to-pin compatibility across the SAM4S series (and with SAM4N, SAM3S, SAM3N, SAM7S in 64-pin versions) allows flash-size migration without PCB redesign. Typical applications include compact portable and battery-powered devices, IoT sensor nodes, industrial control modules, and consumer electronics where a small 64-ball wafer-level footprint at up to 120 MHz is required. A key design consideration: the WLCSP package exposes balls on a ~0.4-0.5 mm pitch; rework requires experienced assembly and the PCB must follow Microchip's ball-mapping layout guidelines. Confirm exact ball pitch and outline in the manufacturer datasheet before layout. This page synthesizes verified distributor data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S4BB-ANR - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4BB-ANR

ATSAM4S4BB-ANR - 120MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4BB-ANR is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz, with 256 KB of embedded Flash and 64 KB of SRAM, housed in a 64-pin LQFP (10 x 10 mm) surface-mount package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and a rich set of peripherals onto one die. Within the semiconductor hierarchy, the ATSAM4S4BB-ANR belongs to the ARM Cortex-M4 32-bit MCU class, the broader SAM4S Flash MCU family from Microchip (formerly Atmel), and the general category of embedded processors used in industrial and consumer electronic systems. Key features include the Cortex-M4 core with DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU), dual-bank Flash with ECC, Security Bit and Lock Bits for code protection, and a wide 1.62 V to 3.6 V single-supply operating range. The DSP extension set accelerates filter and control math, while the MPU supports functional-safety and RTOS memory partitioning. Architecturally, the device uses an ARMv7E-M Harvard pipeline with a dedicated AHB bus matrix, allowing parallel flash-execution and peripheral DMA traffic. Power consumption is optimized for the SAM4S family, supporting low-power sleep, wait, and backup modes suitable for battery-operated nodes. Typical applications include industrial control and factory automation, motor control and power conversion, building automation and IoT sensor nodes, and consumer appliances requiring deterministic 32-bit control with DSP capability. A key design consideration: the ANR suffix denotes Tape-and-Reel packaging and industrial temperature operation; the SAM4S series is pin-to-pin compatible with SAM4N, SAM3S, SAM3N and SAM7S devices in the 64-pin version, which simplifies in-family migration but does not extend to other vendors' MCUs. This page synthesizes distributor pricing, drop-in SAM4S family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S4BB-MN - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4BB-MN

ATSAM4S4BB-MN - 120MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4BB-MN is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 256 KB of embedded Flash and 64 KB of SRAM, housed in a 64-pin VQFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals such as ADCs, timers, and communication interfaces on one die. Within the embedded systems hierarchy, the SAM4S family belongs to the 32-bit ARM Cortex-M class of MCUs, positioned above 8-bit PIC devices and below application processors, and is used wherever deterministic real-time control and moderate DSP capability are required. Key differentiating features include the Cortex-M4 core with DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU) for robust software partitioning, dual-bank Flash enabling safe in-application programming and firmware updates, ECC (error-correcting code) on Flash, plus Security Bit and Lock Bits for IP protection. The wide 1.62 V to 3.6 V supply range simplifies battery and industrial power design. Architecturally, the SAM4S4B builds on the high-performance Cortex-M4 pipeline, which pairs the 32-bit core with single-cycle MAC and SIMD DSP instructions, accelerating filtering and control-loop mathematics beyond what a Cortex-M3 delivers. According to the Microchip SAM4S family datasheet (document 60001419B), the series also offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N and SAM7S devices, enabling easy migration within the portfolio and across the XAIPART catalog. Typical applications include industrial control and automation nodes, consumer and medical devices, and embedded systems requiring USB connectivity and 12-bit ADC plus 12-bit DAC conversion. The 64-QFN footprint suits compact, thermally demanding PCB layouts. When designing with this part, budget the Flash across the dual banks to allow background firmware updates without external memory, and use the MPU to isolate safety-critical tasks. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4S4BB-MNR - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4BB-MNR

ATSAM4S4BB-MNR - 120MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4BB-MNR is a 32-bit ARM Cortex-M4 flash microcontroller operating at up to 120 MHz, with 256 KB of embedded Flash and 64 KB of SRAM, housed in a 64-pin QFN (9x9 mm) surface-mount package. A microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, program memory, data memory, and peripherals on one die, forming the lowest tier of the embedded-computing hierarchy (MCU -> embedded processor -> system-on-chip). The SAM4S family is part of Microchip's ARM-based SAM portfolio, positioned for general-purpose mid-range embedded control applications. Key features of the ATSAM4S4B include the ARM Cortex-M4 core with Memory Protection Unit (MPU), DSP instructions, and the Thumb-2 instruction set; 256 Kbytes of embedded Flash with ECC, Security Bit and Lock Bits; 64 Kbytes of SRAM; and dual-bank Flash enabling safe in-application firmware updates. Supply voltage spans 1.62V to 3.6V, supporting both coin-cell and USB-powered designs. Architecturally, the Cortex-M4 pipeline with DSP extensions accelerates filter and control-loop math, while the dual-bank Flash plus ECC improves field-update robustness and data integrity in noise-prone industrial environments. According to the Microchip SAM4S family datasheet (document 60001419B), the SAM4S series offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N and SAM7S devices, simplifying migration within the portfolio. Typical applications include industrial control and automation nodes, consumer and portable devices, and USB-connected sensor bridges where the full-speed USB Device port and 120 MHz compute headroom reduce bill-of-material complexity. Design consideration: keep VDDIN within the 1.62V to 3.6V range and decouple VDDCORE/VDDOUT per the SAM4S datasheet power-tree; the 9x9 mm QFN requires an exposed-pad ground connection for thermal and signal-integrity performance. This page synthesizes distributor pricing, family drop-in alternatives, and practical design guidance not consolidated on the manufacturer datasheet alone.

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ATSAM4S4CA-AU - 120MHz Cortex-M4 256KB Flash MCU | Microchip
ATSAM4S4CA-AU

ATSAM4S4CA-AU - 120MHz Cortex-M4 256KB Flash MCU | Microchip

The Microchip Technology ATSAM4S4CA-AU is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with 256 KB of embedded Flash and 64 KB of SRAM, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single die, forming the lowest level of the embedded computing hierarchy: semiconductor -> integrated circuit -> embedded processor -> microcontroller. The SAM4S family belongs to Microchip's ARM-based SAM portfolio, which targets general-purpose embedded control where a balance of performance, integration, and power efficiency is required. Key features include the Cortex-M4 core with hardware floating-point unit, operating from a 1.62 V to 3.6 V single supply, and power consumption of approximately 180 uA/MHz per the Microchip ATSAM4S4C product page. The 256 KB Flash supports in-application programming, and the 64 KB SRAM provides headroom for real-time control loops, communication buffers, and small RTOS kernels. Architecturally, the device combines the Cortex-M4 pipeline with a multi-layer bus matrix, DMA channels, and a rich peripheral set typical of the SAM4S family, including USART, SPI, TWI (I2C), and PWM resources. Flash accelerator logic keeps the core fed at the full 120 MHz clock rate, minimizing wait-state penalties in deterministic control applications. Typical applications include industrial control and automation nodes, consumer appliance interfaces, embedded networking and gateways, test and measurement instruments, and portable battery-powered devices where the 180 uA/MHz consumption extends battery life. When designing with this device, plan power budgeting around the 1.62 V to 3.6 V supply window and use appropriate decoupling on the VDDIO and VDDCORE domains; also verify that the industrial temperature grade (typically -40C to +85C) matches your end environment. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond the raw datasheet, giving engineers a single citable source for the ATSAM4S4CA-AU.

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ATSAM4S4CA-CFU - 120MHz Cortex-M4 MCU, 256KB Flash | Microchip
ATSAM4S4CA-CFU

ATSAM4S4CA-CFU - 120MHz Cortex-M4 MCU, 256KB Flash | Microchip

The Microchip Technology ATSAM4S4CA-CFU is a 32-bit ARM Cortex-M4 microcontroller from the SAM4S series running at 120 MHz with 256KB of on-chip flash memory, housed in a 100-ball VFBGA (7x7 mm) package for industrial temperature ranges. An ARM Cortex-M4 MCU is a 32-bit reduced-instruction-set (RISC) processor core that integrates a CPU, memory, and peripherals on a single chip, serving as the central controller in embedded systems. Within the product hierarchy, the SAM4S sits between entry-level Cortex-M0+ devices and high-performance Cortex-M7 MCUs, and the ATSAM4S4CA-CFU occupies the mid-memory-density tier of the SAM4S family, complemented by larger siblings in the power-management and embedded-control landscape. Key features include a 120 MHz Cortex-M4 core with single-cycle MAC and hardware FPU support in the family, 256KB flash with page-erase programming, and pin-to-pin compatibility across the SAM4S, SAM4N, SAM3S, SAM3N and SAM7S portfolios, which simplifies migration and footprint reuse. The 100-VFBGA (7x7 mm) ball-grid-array keeps board area minimal for space-constrained industrial designs. From a technical perspective, the SAM4S series combines scalable performance with memory density and power efficiency. The Cortex-M4 core delivers deterministic real-time response with nested vectored interrupts, and the memory bus architecture sustains full-speed flash execution at 120 MHz with flash accelerator techniques typical of the Atmel/Microchip SMART family. Typical applications include industrial automation controllers, sensor hubs and data loggers, embedded networking nodes, and consumer portable devices where a compact 100-ball BGA and 256KB flash provide the right balance of cost and capability. Design consideration: 100-VFBGA packages require microvia or HDI PCB technology; verify your fab capability for 0.8 mm or finer ball pitch before layout, and plan power decoupling on every supply ball pair. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, making it a one-stop reference for the ATSAM4S4CA-CFU.

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ATSAM4S4CA-CU - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
ATSAM4S4CA-CU

ATSAM4S4CA-CU - 120MHz Cortex-M4 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM4S4CA-CU is a 32-bit ARM Cortex-M4 microcontroller running at up to 120 MHz with single-cycle access to 256 KB of Flash memory, 64 KB of SRAM, and a 100-ball TFBGA package (9x9 mm) specified for the industrial temperature range (-40C to +85C). A microcontroller unit (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 (MCU -> embedded processor -> system-on-chip). The SAM4S family sits within the Microchip (formerly Atmel) SMART ARM-based MCU portfolio and belongs to the broader class of 32-bit RISC flash microcontrollers used in embedded control systems. The ATSAM4S4CA-CU is one of the smaller Flash/RAM members of the family, positioned for cost-sensitive industrial designs that still need the full SAM4S peripheral set. Key differentiating features include the Cortex-M4 core with DSP instructions and a single-precision hardware FPU for math-intensive control loops, a full-speed USB Device port with embedded transceiver, an external bus interface supporting SRAM, PSRAM, NOR Flash, NAND Flash, and LCD modules, and native support for Microchip QTouch capacitive touch technology for buttons, sliders, and wheels. The SAM4S peripheral set also includes multiple USART/SPI/TWI (I2C) interfaces, PWM timers, a 12-bit ADC, and a parallel capture mode for data acquisition. The SAM4S architecture implements up to 2048 KB of Flash with optional dual-bank implementation across the family, up to 160 KB of SRAM on larger variants, and Microchip-documented pin-to-pin compatibility with SAM7S, SAM3N, SAM4N and SAM3S devices. The 120 MHz core with FPU achieves roughly 1.25 DMIPS/MHz class performance for deterministic real-time control, and the on-chip cache above 128 KB Flash variants accelerates execution from Flash. Typical applications include industrial automation controllers, consumer and industrial touch interfaces, motor control, USB-connected instruments, and embedded systems requiring external memory or LCD expansion via the EBI. The 100-ball TFBGA keeps the board footprint small while exposing the full EBI and peripheral count of the device. Design consideration: the ATSAM4S4CA-CU is supplied in tray packaging for industrial-grade operation, and the TFBGA ball footprint requires careful PCB land-pattern design and X-ray-capable inspection. Designers migrating from SAM7S, SAM3N, SAM3S, or SAM4N devices benefit from documented pin-to-pin compatibility within the Microchip portfolio. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with all pricing referenced as of 2026-10-07.

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