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ATSAM3U2EA-CU - 96MHz 128KB Cortex-M3 MCU | Microchip
ATSAM3U2EA-CU

ATSAM3U2EA-CU - 96MHz 128KB Cortex-M3 MCU | Microchip

The Microchip Technology ATSAM3U2EA-CU is a 32-bit ARM Cortex-M3 flash microcontroller with a maximum clock frequency of 96 MHz, 128 KB of embedded flash memory, and 36 KB of SRAM in a 144-pin LFBGA package. It operates from a 1.8 V or 3.3 V supply according to the verified distributor data. The device belongs to the SAM3U family of embedded microcontrollers and combines a high-performance 32-bit RISC processor with flexible on-chip memory and integrated communication peripherals. A flash microcontroller is a semiconductor in which a microcontroller core, program memory, data memory, and peripherals are integrated into one package. The ATSAM3U2EA-CU sits within the hierarchy of embedded controller, 32-bit microcontroller, ARM Cortex-M processor, and SAM3U family. Its Cortex-M3 architecture provides 32-bit processing while retaining a compact embedded-control architecture suited to systems that require substantial flash memory, serial connectivity, and deterministic peripheral access without a separate external processor. The verified features include an ARM Cortex-M3 revision 2.0 core operating to 96 MHz, a Memory Protection Unit, and the Thumb-2 instruction set. The ATSAM3U2EA-CU configuration provides 128 KB of embedded flash and 36 KB of SRAM. The SAM3U family architecture supports a 128-bit-wide flash memory interface with a memory accelerator and dual-bank organization. These characteristics make the device appropriate for USB device-class equipment, removable storage interfaces, industrial data acquisition, and connected embedded controls. The integrated peripheral set includes a high-speed USB device port with an embedded transceiver, a high-speed memory card interface supporting SDIO, SD, and MMC, and an external bus interface. These interfaces allow a compact board to connect directly to USB hosts, flash-memory cards, and external bus peripherals. The Cortex-M3 processor and memory protection unit also support controlled execution and memory partitioning in firmware that separates application code from protected resources. Typical uses include USB-connected data loggers, SD-card-based industrial recorders, secure access terminals, portable test equipment, and embedded control systems requiring several serial interfaces. The 96 MHz operating ceiling provides substantial throughput for protocol handling, while 128 KB of flash stores application code, boot logic, configuration data, and firmware updates. The 36 KB of SRAM supports packet buffers, working memory, and moderate real-time processing workloads. When assigning the ATSAM3U2EA-CU, verify the complete pin-level power, ground, and peripheral assignments against the manufacturer datasheet. The 144-pin LFBGA requires a controlled PCB land pattern and careful thermal and escape-routing planning. Because the verified distributor excerpt does not provide the full electrical limits, pin names, or absolute maximum ratings, those values should not be inferred from the family-level description. This product record combines verified distributor specifications, manufacturer datasheet availability, package information, lifecycle status, source links, and application-focused engineering guidance. It also distinguishes the target from same-package family alternatives while clearly identifying parameters that require confirmation before substitution or production release.

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ATSAM3U4CA-CU - 96MHz Cortex-M3 MCU 256KB Flash | Microchip
ATSAM3U4CA-CU

ATSAM3U4CA-CU - 96MHz Cortex-M3 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM3U4CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 96 MHz, with 256 KB of embedded dual-bank Flash and 52 KB of SRAM, housed in a 100-pin TFBGA (9x9 mm) package. It belongs to the SAM3U series (originally developed by Atmel, now Microchip Technology). A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die; the ATSAM3U4CA-CU sits in the hierarchy of ARM Cortex-M3 based Flash MCUs within the broader ARM microcontroller and power/embedded-processing ecosystem. The SAM3U family is positioned as a high-performance, high-integration USB-enabled MCU line for embedded systems. Key features include the ARM Cortex-M3 revision 2.0 core running to 96 MHz with the Thumb-2 instruction set, a Memory Protection Unit (MPU), 128-bit wide Flash access with a memory accelerator for zero-wait-state execution at full speed, and dual-bank Flash (2 x 128 KB) enabling safe in-application programming and firmware upgrade. Per supply voltage options of 1.8V, 2.5V, or 3.3V, the device suits both battery-powered and rail-powered designs. Technically, the ATSAM3U4CA-CU combines the Cortex-M3 RISC pipeline with high-bandwidth memory access. The 128-bit wide Flash interface plus accelerator mitigates the classic flash-latency bottleneck of fast MCUs, while the dual-bank architecture allows code to execute from one bank while the other is erased or programmed. The MPU supports functional-safety-oriented software partitioning. The SAM3U series is also known for its High Speed USB Device port and embedded Flash of up to 256 Kbytes with up to 52 Kbytes of SRAM. Typical applications include USB device peripherals such as mass-storage and communication-class devices, industrial control nodes, and consumer embedded systems requiring 96 MHz-class processing with on-chip Flash. Design consideration: the TFBGA (9x9) ball-grid package requires controlled-impedance, ball-escape-routing PCB design and reflow assembly; budget decoupling on all supply balls and follow the manufacturer layout guidance for the 100-ball footprint. This page synthesizes verified distributor data, drop-in alternatives, pricing context, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM3U4EA-AU - 96MHz Cortex-M3 MCU 256KB Flash | Microchip
ATSAM3U4EA-AU

ATSAM3U4EA-AU - 96MHz Cortex-M3 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM3U4EA-AU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 96 MHz with 256 KB of dual-bank embedded Flash and 52 KB of SRAM, housed in a 144-pin LQFP (20x20 mm) surface-mount package. It belongs to the SAM3U family originally developed by Atmel and now part of Microchip Technology, engineered for high-throughput data-transfer applications such as USB peripherals and industrial gateways. A microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, program memory, data memory, and peripherals (UART, SPI, I2C, timers, USB, ADC) onto one die. In the embedded processing hierarchy, the SAM3U4E sits between entry-level Cortex-M0 MCUs and higher-performance Cortex-M4 parts, with Cortex-M3 being its 32-bit RISC core architecture. The Cortex-M3 revision 2.0 runs at up to 96 MHz, executes the Thumb-2 instruction set, and includes a Memory Protection Unit (MPU) for memory isolation and OS-style privilege separation. Hypernym chain: SAM3U4E -> SAM3U family -> ARM Cortex-M3 MCU -> 32-bit microcontroller -> embedded processor -> integrated circuit. Key features include 256 KB of Flash accessed 128 bits wide through a memory accelerator that sustains near-zero wait-state execution from SRAM or Flash at full clock. The dual-bank architecture supports safe in-application programming (IAP) and firmware field updates without halting user code. A multi-layer AHB bus matrix, dedicated DMA channels, and Peripheral DMA Controllers (PDC) maximize concurrent peripheral throughput, while a high-speed USB 2.0 Full-Speed Device port with on-chip PHY targets USB data-acquisition designs. The architecture sustains high-speed peripheral transfers by allowing parallel bus-matrix transactions between the Cortex-M3 core, SRAM banks, USB, and DMA engines. This makes the device well suited to USB data-acquisition dongles, industrial gateways, and test-instrument front ends where deterministic throughput matters more than raw compute. Typical applications include USB data-acquisition modules, industrial control gateways, smart metering, point-of-sale terminals, and motor-control human-machine interface (HMI) panels. The 144-pin LQFP exposes up to four UART, three SPI, two I2C, USB, CAN, and a 12-bit ADC. Supply voltage spans 1.62V to 3.6V across the industrial temperature range -40C to +85C. Design consideration: at 96 MHz place at least one 100 nF decoupling cap per supply pin, keep the ground plane unbroken, and use the flash accelerator with zero wait-state Flash configuration; if execution timing is critical, copy hot routines to SRAM. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3U4EA-CU - 96MHz Cortex-M3 MCU 256KB Flash LFBGA-144 | Microchip
ATSAM3U4EA-CU

ATSAM3U4EA-CU - 96MHz Cortex-M3 MCU 256KB Flash LFBGA-144 | Microchip

The Microchip Technology (formerly Atmel) ATSAM3U4EA-CU is a 32-bit ARM Cortex-M3 microcontroller in the SAM3U family, featuring a 96 MHz CPU with up to 256 Kbytes of embedded Flash and 52 Kbytes of SRAM, packaged in a 144-ball LFBGA (10x10 mm). It integrates a High-Speed USB 2.0 Device port with embedded transceiver, a High-Speed MCI for SDIO/SD/MMC cards, an External Bus Interface, and a peripheral set tailored for high-throughput embedded applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile memory (SRAM), non-volatile program memory (Flash), and a configurable set of peripherals on one die. The ARM Cortex-M3 is a 32-bit RISC core designed by ARM Holdings and widely licensed across the embedded industry; it implements the Thumb-2 instruction set, offers deterministic interrupt latency, and includes an optional Memory Protection Unit (MPU) for separating kernel and user tasks. The SAM3U family sits in the Cortex-M3 hierarchy as a general-purpose, peripheral-rich derivative, ranking above Cortex-M0 parts in performance and below Cortex-M4 in DSP capability. Key features include 256 Kbytes of 128-bit-wide Flash with a memory accelerator and dual-bank organization, 52 Kbytes of SRAM, a 96 MHz maximum CPU clock, an integrated High-Speed USB 2.0 Device port, a 4-bit SDIO/SD/MMC Host interface, and a multi-layer AHB bus matrix. The device also offers up to 96 GPIO lines, a 12-bit ADC, multiple timers, USART, SPI, TWI, and an External Bus Interface supporting SRAM, NOR Flash, and NAND Flash memories. Technically, the SAM3U uses a Harvard bus architecture with a multi-layer AHB matrix that allows simultaneous CPU and DMA accesses across SRAM, Flash, and peripherals without contention. The integrated USB 2.0 High-Speed transceiver eliminates the need for an external PHY and supports up to 480 Mbps, while the 128-bit Flash bus enables zero-wait-state execution at full CPU speed from on-chip memory. Typical applications include USB peripherals such as industrial data loggers and instrumentation, smart-card readers, SD card readers, industrial control panels, and Human-Machine Interfaces (HMIs) where high data throughput, USB connectivity, and ample on-chip memory matter. The LFBGA-144 package and 1.8V/3.3V dual-voltage operation make it suitable for portable and battery-aware designs. When designing with this MCU, ensure the PCB layout provides a continuous ground plane beneath the BGA and adequate via stitching for thermal dissipation. Decoupling capacitors (100 nF plus 4.7 µF bulk) should be placed within a few millimeters of each supply pin to maintain signal integrity at the 96 MHz core frequency. This page synthesizes distributor pricing, cross-vendor drop-in alternatives, and practical design notes not found on a single manufacturer datasheet, giving component engineers a single decision-ready reference for the ATSAM3U4EA-CU.

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ATSAM3X4CA-AU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip (Tape & Reel)
ATSAM3X4CA-AU

ATSAM3X4CA-AU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip (Tape & Reel)

The Microchip Technology ATSAM3X4CA-AU is a 32-bit ARM Cortex-M3 microcontroller running at 84 MHz with 256 KB (256K x 8) of embedded Flash memory, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and a rich set of peripherals onto a single silicon die, forming the heart of an embedded system. Within the semiconductor hierarchy, the ATSAM3X4CA-AU belongs to the SAM3X family of ARM Cortex-M3-based flash microcontrollers, under the broader categories of 32-bit MCUs, embedded processors, and integrated circuits. Microchip (which acquired Atmel, the original SAM3X designer) positions this family for applications needing significant processing headroom, connectivity, and analog integration. Key features of the ATSAM3X4CA-AU include the 84 MHz Cortex-M3 core delivering 1.25 DMIPS/MHz performance, 256 KB of Flash program memory, flexible supply operation from 1.62 V minimum (nominally 1.8 V, 2.5 V, or 3.3 V rails), and a Green Industrial temperature rating suitable for demanding industrial environments. The device integrates USB connectivity and a multi-source interrupt controller typical of the SAM3X architecture. Architecturally, the Cortex-M3 core combines a 3-stage pipeline with a Harvard bus structure, a nested vectored interrupt controller (NVIC) for deterministic low-latency interrupts, and a Thumb-2 instruction set that balances code density with performance. Flash memory is tightly coupled to the core for zero-wait-state execution in many access patterns, supporting real-time control loops. Typical applications include industrial automation and control nodes, 3D printers and motion control systems, consumer devices requiring USB connectivity, and embedded instrumentation. The Arduino Due development platform popularized the SAM3X family, giving this device a large ecosystem of libraries and reference designs. Design consideration: the device requires a 1.62 V minimum supply, so verify brown-out behavior on 3.3 V rails with high transient loads, and follow Microchip layout guidance for the LQFP-100 decoupling network. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3X4CA-AUR - 84MHz Cortex-M3 MCU 256KB Flash | Microchip
ATSAM3X4CA-AUR

ATSAM3X4CA-AUR - 84MHz Cortex-M3 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM3X4CA-AUR is a 32-bit ARM Cortex-M3 microcontroller running at 84 MHz with 256 KB (256K x 8) of embedded Flash memory, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and a rich set of peripherals onto a single silicon die, forming the heart of an embedded system. Within the semiconductor hierarchy, the ATSAM3X4CA-AUR belongs to the SAM3X family of ARM Cortex-M3-based flash microcontrollers, under the broader categories of 32-bit MCUs, embedded processors, and integrated circuits. Microchip (which acquired Atmel, the original SAM3X designer) positions this family for applications needing significant processing headroom, connectivity, and analog integration. Key features of the ATSAM3X4CA-AUR include the 84 MHz Cortex-M3 core delivering 1.25 DMIPS/MHz performance, 256 KB of Flash program memory, flexible supply operation from 1.62 V minimum (nominally 1.8 V, 2.5 V, or 3.3 V rails), and a Green Industrial temperature rating suitable for demanding industrial environments. The device integrates USB connectivity and a multi-source interrupt controller typical of the SAM3X architecture. Architecturally, the Cortex-M3 core combines a 3-stage pipeline with a Harvard bus structure, a nested vectored interrupt controller (NVIC) for deterministic low-latency interrupts, and a Thumb-2 instruction set that balances code density with performance. Flash memory is tightly coupled to the core for zero-wait-state execution in many access patterns, supporting real-time control loops. Typical applications include industrial automation and control nodes, 3D printers and motion control systems, consumer devices requiring USB connectivity, and embedded instrumentation. The Arduino Due development platform popularized the SAM3X family, giving this device a large ecosystem of libraries and reference designs. Design consideration: the device requires a 1.62 V minimum supply, so verify brown-out behavior on 3.3 V rails with high transient loads, and follow Microchip layout guidance for the LQFP-100 decoupling network. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3X4CA-CU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip
ATSAM3X4CA-CU

ATSAM3X4CA-CU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM3X4CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at 84 MHz with 256KB (256K x 8) of embedded flash memory, housed in a 100-ball TFBGA (9x9 mm) package. A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single chip, forming the computational heart of embedded systems. The ATSAM3X4CA-CU belongs to the SAM3X family within Microchip's ARM-based SAM3 line, sitting in the hierarchy: ARM Cortex-M3 -> 32-bit flash MCU -> embedded microcontroller -> semiconductor device. Its Cortex-M3 revision 2.0 core implements the Thumb-2 instruction set, includes a Memory Protection Unit (MPU) and a 24-bit SysTick counter, and uses a Nested Vector Interrupt Controller for deterministic interrupt handling. Key features include 84 MHz core speed, 256KB on-chip flash, and rich connectivity: CAN, Ethernet, I2C, IrDA, LIN, MMC, SPI, and SSC serial audio interface. Ethernet and dual CAN make it unusually well equipped for networked industrial nodes, while the SSC targets audio and telecom peripherals. Architecturally, the device operates from a low 1.8V-class supply (per distributor listings, 1.8V core with 3.3V I/O) in an industrial temperature grade. The green, MRL A qualified BGA100 packaging supports lead-free surface-mount assembly, and the 9x9 mm ball grid array saves board area versus 100-pin QFP alternatives while improving signal integrity for high-speed peripherals. Typical applications include industrial automation and PLC nodes, Ethernet-connected gateways and IoT edge devices, motor control and CAN networking equipment, and consumer or embedded control boards such as Arduino Due-class platforms built on the SAM3X family. When designing with this device, plan power sequencing and decoupling for the 100-ball BGA: use a solid ground plane under the array and verify that your assembly partner supports 0.8 mm-pitch BGA reflow. Budget flash usage carefully, as the 256KB density is fixed within the family package footprint. This page synthesizes distributor pricing availability, drop-in family alternatives, and practical design guidance not consolidated in the manufacturer datasheet.

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ATSAM3X4EA-AU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip
ATSAM3X4EA-AU

ATSAM3X4EA-AU - 84MHz Cortex-M3 MCU 256KB Flash | Microchip

The Microchip Technology ATSAM3X4EA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 84 MHz with 256 KB (256K x 8) of embedded Flash memory and 144-pin LQFP (20x20 mm) surface-mount package. It is a member of the SAM3X family, which integrates a high-speed USB device/port with an on-chip transceiver, dual CAN controllers, Ethernet MAC, and a rich analog and connectivity peripheral set. A 32-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and programmable peripherals on a single chip, forming the highest-volume class of embedded processors. Within the hierarchy of ARM-based flash MCUs, the SAM3X sits in Microchip (formerly Atmel) AT91SAM mid-range tier: ARM Cortex-M3 core -> AT91SAM ARM-based Flash MCU -> 32-bit embedded microcontroller -> semiconductor. Key features include the ARM Cortex-M3 revision 2.0 core with Memory Protection Unit (MPU), Thumb-2 instruction set, 24-bit SysTick counter, and Nested Vector Interrupt Controller (NVIC). Connectivity spans CAN, EBI/EMI external bus, Ethernet MAC, I2C, IrDA, LIN, and MMC/SD, plus USB high-speed for fast data up/downloading with robust EMI tolerance. Industrial temperature support (GREEN IND TEMP grade per Mouser) makes it suitable for extended environments. Technical depth: the Cortex-M3 core at 84 MHz delivers approximately 1.25 DMIPS/MHz deterministic interrupt handling, while the multi-layer bus matrix allows parallel access to Flash, SRAM, and peripherals. Two 2x128 KB flash banks per the digichips listing reflect dual-bank architecture enabling simultaneous code execution and programming. Typical applications include 3D printers, industrial automation, networked CAN/Ethernet gateways, and USB-connected embedded systems where high-speed USB plus CAN coexistence is required. Design consideration: the LQFP-144 20x20 mm footprint requires careful decoupling on multiple VDDIO/VDDCORE pins; use 100 nF ceramic capacitors at each supply pin pair. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3X4EA-CU - 84MHz Cortex-M3 MCU, 256KB Flash | Microchip
ATSAM3X4EA-CU

ATSAM3X4EA-CU - 84MHz Cortex-M3 MCU, 256KB Flash | Microchip

The Microchip Technology ATSAM3X4EA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 84 MHz with 256KB (256K x 8) of embedded Flash memory, delivered in a 144-ball LFBGA (13 x 13 mm) surface-mount package. A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and a rich set of peripherals onto one silicon die. Within the power management IC and semiconductor hierarchy, MCUs sit at the heart of embedded systems, executing real-time control, communication, and human-interface tasks. The SAM3X/A family belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, positioned above the smaller SAM3N series and alongside the USB-capable SAM3U series. Key features of the ATSAM3X4EA-CU include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Memory Protection Unit (MPU), a 24-bit SysTick timer, and Nested Vectored Interrupt Controller (NVIC) for deterministic interrupt handling. Connectivity peripherals span CAN, EBI/EMI external bus, Ethernet MAC, I2C, IrDA, LIN, and MMC/SD interfaces, making the device a strong fit for multi-protocol industrial nodes. The CMOS process platform delivers efficient power performance for always-on embedded applications. Technically, the Cortex-M3 architecture provides 32-bit RISC throughput with low interrupt latency, while the peripheral DMA channels offload the CPU in high-bandwidth data paths such as Ethernet framing or CAN message queues. The industrial temperature grade (suffix -CU, green package, MRL A) supports harsh-environment deployment. Typical applications include industrial automation controllers, CAN/Ethernet gateways, embedded networking equipment, test instruments, and motor control systems that require 32-bit compute with extensive communication interfaces. A key design consideration is supply voltage: the device operates from a nominal 1.8 V core-class supply per distributor listings, so verify the exact I/O and VDDCORE ranges in the manufacturer datasheet before finalizing the power tree. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3X8CA-AU - 84MHz Cortex-M3 MCU 512KB Flash | Microchip
ATSAM3X8CA-AU

ATSAM3X8CA-AU - 84MHz Cortex-M3 MCU 512KB Flash | Microchip

The Microchip Technology ATSAM3X8CA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 84 MHz with 512 KB of Flash memory (organized as 2 x 256 KB banks) and 96 KB of SRAM (64 KB + 32 KB banks), housed in a 100-pin LQFP (14 x 14 mm) package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals to serve as the brain of an embedded system. The ATSAM3X8CA-AU belongs to the SAM3X/A family, part of the broader ARM Cortex-M based 32-bit microcontroller class within Microchip's SMART ARM-based MCU portfolio, sitting above 8-bit AVR MCUs and alongside Cortex-M4 SAM4 parts. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Memory Protection Unit (MPU), a 24-bit SysTick counter, and Nested Vectored Interrupt Controller (NVIC). Integrated high-speed USB with an on-chip transceiver enables fast data up/downloading, and the dual-bank Flash architecture supports safe in-application firmware updates. Connectivity is comprehensive: CAN, Ethernet MAC, I2C (TWI), IrDA, LIN, MMC/SDIO, SPI, SSC, UART, and USB. Rich analog and timing peripherals make the device suitable for complex control and communication nodes. This exact silicon is best known as the MCU of the Arduino Due board, giving it a very large ecosystem of code, libraries, and community support. Typical applications include industrial automation and control, CAN/Ethernet networking nodes, 3D printers, motor control, data loggers, and USB-connected instruments. Design consideration: the dual 256 KB Flash banks allow read-while-write operation for bootloader strategies, but Flash wait states increase at 84 MHz, so code performance tuning via the cache/acceleration layer is worthwhile. This page adds value beyond the datasheet by synthesizing distributor pricing tiers, drop-in same-family alternatives, practical design notes, and an Arduino Due ecosystem context not found on typical product pages.

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ATSAM3X8CA-CU - 84MHz Cortex-M3 MCU, 512KB Flash | Microchip
ATSAM3X8CA-CU

ATSAM3X8CA-CU - 84MHz Cortex-M3 MCU, 512KB Flash | Microchip

The Microchip Technology ATSAM3X8CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at 84 MHz with 512KB (512K x 8) of flash memory and 96KB of SRAM, housed in a 100-ball TFBGA (9x9 mm) package. A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, non-volatile program memory, RAM, and a rich set of peripherals onto one die. The SAM3X family sits within Microchip's (formerly Atmel's) 32-bit SAM MCU hierarchy, positioned above the entry-level SAM3N/SAM3S families by adding Ethernet MAC, CAN controllers, and a USB device port for connected embedded systems. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Memory Protection Unit (MPU), a 24-bit SysTick timer, and a Nested Vector Interrupt Controller (NVIC). Connectivity spans CAN, Ethernet, I2C (TWI), IrDA, LIN, MMC/SD, SPI, SSC, UART, and USB, making this part a single-chip networking and control hub. The 512KB flash is organized as two 256KB banks supporting dual-bank flash operations. Technical depth: the Cortex-M3 pipeline is optimized for interrupt-driven control code, with deterministic exception handling suited to industrial communication stacks such as CANopen and EtherCAT-adjacent protocols. The two-bank flash architecture allows firmware management schemes, while the MPU supports RTOS-based designs requiring memory isolation between tasks. Typical applications include industrial automation and control nodes, embedded Ethernet/CAN gateways, and USB-connected instrumentation. Notably, this MCU family powers the Arduino Due development board, giving it an extensive open-source software ecosystem. Design consideration: the 100-ball TFBGA package requires controlled-impedance PCB layout with via-in-pad or escape routing; plan at least a six-layer or well-planned four-layer board for the Ethernet and USB interfaces. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3X8EA-AU - 84MHz Cortex-M3 MCU, 512KB Flash | Microchip
ATSAM3X8EA-AU

ATSAM3X8EA-AU - 84MHz Cortex-M3 MCU, 512KB Flash | Microchip

The Microchip Technology ATSAM3X8EA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 84 MHz with 512 KB (512K x 8) of embedded Flash and 100 KB of SRAM, housed in a 144-pin LQFP (20 x 20 mm) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the highest-volume class of embedded processors. The SAM3X/A series belongs to the ARM Cortex-M based Flash MCU family, which sits within the broader hierarchy of 32-bit RISC embedded processors used throughout industrial, consumer, and automotive electronics. Microcontrollers like this one execute deterministic real-time control code while managing communication, sensing, and actuation peripherals on-chip. Key features include the ARM Cortex-M3 revision 2.0 core with Memory Protection Unit (MPU), Thumb-2 instruction set, 24-bit SysTick counter, and Nested Vector Interrupt Controller. The 512 KB Flash uses a 128-bit wide access with a memory accelerator and dual-bank architecture, while the 100 KB SRAM is split into dual banks. Rich connectivity includes CAN, EBI/EMI, Ethernet MAC, I2C (TWI), IrDA, LIN, and MMC/SD card interfaces. Analog capability comprises a 16-channel 12-bit ADC and 2-channel 12-bit DAC. Operating from a 1.62V to 3.6V supply (1.8V/2.5V/3.3V rails), the ATSAM3X8EA-AU is the exact MCU used on the Arduino Due, making it highly accessible to embedded developers. Dual-bank Flash supports safe in-application firmware updates. Typical applications include industrial automation and motor control, IoT gateways and networking equipment, and 3D printer or robotics controller boards. The Ethernet MAC and dual CAN controllers make it particularly well suited to industrial communication nodes. Design consideration: for Ethernet operation, supply from a clean 3.3V rail and follow the datasheet decoupling guidance on the 144-LQFP, using at least a four-layer PCB with a solid ground plane for analog peripherals. This page synthesizes distributor pricing, drop-in family alternatives, and practical design guidance not found on standard datasheet portals, as of 2026-09-20.

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ATSAM3X8EA-CU - ARM Cortex-M3 84MHz MCU 512KB Flash | Microchip
ATSAM3X8EA-CU

ATSAM3X8EA-CU - ARM Cortex-M3 84MHz MCU 512KB Flash | Microchip

The Microchip Technology ATSAM3X8EA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 84 MHz, with 512KB of Flash memory and 100KB of SRAM, housed in a 144-ball BGA (13 x 13 mm) package. 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 layer of the embedded system hierarchy (MCU -> system-on-chip -> embedded processor -> semiconductor device). The SAM3X/A series belongs to Microchip's (formerly Atmel) ARM-based Flash MCU family, based on the high-performance ARM Cortex-M3 RISC processor with the Thumb-2 instruction set. Key features include dual-bank 2 x 256KB Flash memory enabling safe in-application programming, a Memory Protection Unit (MPU) for robust firmware partitioning, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller (NVIC) for deterministic interrupt handling. The connectivity portfolio is a major strength: the device integrates CAN, Ethernet (MAC), EBI/EMI external bus interface, I2C, IrDA, LIN, MMC/SD, SPI, UART and USB peripherals, plus a NAND Flash Controller (NFC) with an additional 4KB of dedicated SRAM. Rich analog and timer peripherals make it suitable for motor control and data acquisition. Typical applications include 3D printer mainboards (the same core powers the well-known Arduino Due), industrial automation controllers, Ethernet/CAN gateways, and embedded networking equipment. Design-wise, plan the Flash dual-bank layout for OTA updates and allow margin on the 3.3V supply rail for the 1.62V to 3.6V operating envelope; BGA-144 assembly requires X-ray inspection capability. This page synthesizes distributor pricing, drop-in alternatives within the SAM3X family, and practical design notes not found in the manufacturer datasheet, as of 2026-09-20.

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ATSAM4C16CA-AU - Dual Cortex-M4 120MHz 1MB MCU | Microchip
ATSAM4C16CA-AU

ATSAM4C16CA-AU - Dual Cortex-M4 120MHz 1MB MCU | Microchip

The Microchip Technology ATSAM4C16CA-AU is a 32-bit dual-core ARM Cortex-M4 flash microcontroller with 1MB (1M x 8) flash memory, 120MHz maximum CPU speed, and a 74-I/O 100-LQFP (14x14 mm) surface-mount package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the highest-volume segment of the embedded systems and power management IC hierarchy. The SAM4C family extends Microchip's (formerly Atmel) ARM-based SAM line by pairing two Cortex-M4 cores in one device, allowing one core to run the main application while the second handles communication, math acceleration, or safety tasks. Key features of the ATSAM4C16CA include the 32-bit dual-core Cortex-M4 architecture with DSP and floating-point extension, 120MHz operating frequency, 1MB embedded flash, connectivity peripherals including EBI/EMI external bus, I2C, IrDA, SPI, and UART/USART, plus brown-out detect/reset, DMA, LCD controller, POR, PWM, and watchdog timer peripherals. The dual-core CM4F implementation enables true parallel processing: each core executes SIMD and hardware FPU instructions, useful for motor control algorithms, cryptography, and digital signal processing without a separate DSP. Program memory is organized as 1M x 8 flash, and the device operates from a 1.2V/3.3V supply per distributor specification data. Typical applications include industrial automation, motor control with encoder feedback, LCD-based human-machine interfaces leveraging the integrated LCD controller, and communication-intensive IoT gateways using multiple UART/USART channels. Design consideration: verify flash density and I/O count against the pin-compatible SAM4C siblings (ATSAM4C8CA at 512KB, ATSAM4C32CA at 2MB) since the 100-LQFP footprint allows same-board memory migration. This page synthesizes distributor pricing, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet.

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ATSAM4C16CA-AUR - Dual-Core 120MHz 1MB Flash MCU | Microchip
ATSAM4C16CA-AUR

ATSAM4C16CA-AUR - Dual-Core 120MHz 1MB Flash MCU | Microchip

The Microchip Technology ATSAM4C16CA-AUR is a 32-bit dual-core ARM Cortex-M4 (with FPU, Cortex-M4F) microcontroller from the SAM4C smart-energy series, running at 120 MHz with 1 MB (1M x 8) embedded flash, 128 KB SRAM, and a supply range of 1.62 V to 3.6 V, housed in a 100-pin LQFP (14 x 14 mm) green industrial-temperature package supplied on tape and reel. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, program memory (flash), data memory (SRAM), and a rich set of peripherals onto one die, sitting at the lowest level of the embedded-system hierarchy below SoCs and application processors. The SAM4C family is Microchip's (formerly Atmel's) ARM-based line targeted specifically at smart energy and dual-core control applications. Key differentiating features include the true dual-core architecture - two independent 120 MHz Cortex-M4F cores that can partition secure metering firmware from application code - plus 1 MB of on-chip flash for feature-rich metering firmware and 128 KB of SRAM for buffering and protocol stacks. The 120 MHz maximum core speed delivers approximately 150 DMIPS-class performance, and the hardware FPU accelerates floating-point DSP math used in energy measurement algorithms. Architecturally, the SAM4C implements a dual-core system designed for smart energy meters: one core can run application/UI tasks while the second core handles security-critical metrology, supporting firmware partitioning that is difficult to retrofit onto single-core MCUs. Peripherals include serial interfaces (UART, SPI, I2C/TWI), timers, and analog blocks typical of the SAM4 series (full peripheral set detailed in the manufacturer datasheet). Typical applications include smart electricity meters, smart-grid nodes, industrial control panels, and secure connected devices where dual-core separation and 1 MB of flash headroom justify the SAM4C selection. A key design consideration is power integrity: at 120 MHz dual-core operation, ensure the 1.62-3.6 V supply rail is decoupled with low-ESR ceramics at every VDD pin pair, and confirm flash wait-state settings against the 120 MHz maximum clock per the datasheet. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4C16CB-AU - Dual Cortex-M4 120MHz 1MB MCU | Microchip
ATSAM4C16CB-AU

ATSAM4C16CB-AU - Dual Cortex-M4 120MHz 1MB MCU | Microchip

The Microchip Technology ATSAM4C16CB-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller running at 120 MHz with 1 MB (1M x 8) embedded Flash, 152 KB SRAM, and per-core cache, housed in a 100-pin LQFP (14x14 mm) package. A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals. The SAM4C family sits within the wider ARM Cortex-M-based microcontroller hierarchy (MCU -> 32-bit MCU -> ARM Cortex-M4 MCU), positioning it as a system-on-chip for smart energy and industrial control systems that require two independent processing cores in one package. Key features include a dual-core architecture with one Cortex-M4 with FPU and a second Cortex-M4 processor, enabling partitioned applications such as metering computation plus communication. The 1 MB Flash supports large firmware images and OTA update dual-bank schemes. The 1.62V to 3.6V supply range suits battery and mains-powered meters, and the industrial temperature offering supports harsh deployment environments. Technical depth: each core runs up to 120 MHz with on-chip cache, improving Flash execution efficiency. Per Microchip product data, the device integrates peripherals targeted at energy metering, including serial connectivity and analog interfaces, allowing one chip to host metrology plus protocol stacks. Typical applications include smart electricity meters, smart energy gateways, industrial automation controllers, and dual-channel sensor processing where the second core offloads real-time tasks. Design consideration: at 120 MHz, supply decoupling and a clean 3.3V rail are essential; plan Flash partitioning early to exploit dual-core task isolation. This page synthesizes distributor pricing, same-package alternatives, and practical design notes not found in the manufacturer datasheet, adding value beyond spec listings.

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ATSAM4C16CB-AUR - Dual-Core Cortex-M4 120MHz MCU 1MB Flash | Microchip
ATSAM4C16CB-AUR

ATSAM4C16CB-AUR - Dual-Core Cortex-M4 120MHz MCU 1MB Flash | Microchip

The Microchip Technology ATSAM4C16CB-AUR is a 32-bit dual-core ARM Cortex-M4 microcontroller IC operating at up to 120 MHz with 1 MB (1M x 8) of embedded Flash memory, housed in a 100-pin LQFP (14x14 mm) surface-mount package. It belongs to the SAM4C family, a system-on-chip solution purpose-built for smart energy applications. A microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, memory, and peripherals. Within the power-management hierarchy, the SAM4C sits at the high end of Microchip's ARM Cortex-M-based smart metering portfolio, integrating two high-performance 32-bit Cortex-M4 processors so that one core can run the metering application while the other handles communication or security tasks. Key differentiating features include dual-core operation at 120 MHz per core, 1024 Kbytes of embedded Flash, integrated hardware cryptography (CRYPTO marked in distributor data), and industrial-grade temperature operation indicated by the -AUR suffix. The dual-core architecture enables true concurrent processing for smart metering SOC designs. Technically, the device uses the ARM Cortex-M4 RISC architecture with a supply interface supporting 1.2V/3.3V operation per distributor specification data. The LQFP-100 Green package supports MSL-rated reflow and tape-and-reel (T&R) delivery for automated assembly. Typical applications include smart energy meters, smart grid nodes, data concentrators, and industrial control systems where secure, concurrent dual-core processing is required. Design consideration: verify the 100-pin LQFP land pattern and decouple both core supply domains per the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4C32CA-AU - Dual-Core 120MHz 2MB Flash MCU | Microchip
ATSAM4C32CA-AU

ATSAM4C32CA-AU - Dual-Core 120MHz 2MB Flash MCU | Microchip

The Microchip Technology ATSAM4C32CA-AU is a 32-bit dual-core ARM Cortex-M4 (with FPU, Cortex-M4F) microcontroller operating at up to 120 MHz, integrating 2 MB (2M x 8) of embedded Flash memory, hardware cryptography, and a 100-pin LQFP (14x14 mm) package. A microcontroller (MCU) is a single-chip computer that combines a processor core, memory, and peripherals into one integrated circuit. Within the power-management hierarchy, the SAM4C family sits in Microchip's 32-bit SAM portfolio: microcontroller -> ARM Cortex-M based MCU -> system-on-chip (SoC) solution. The SAM4C32 is specifically architected as a SoC for smart energy applications such as electricity meters. Key differentiating features include the dual-core Cortex-M4/M4F architecture, which allows one core to run the metering application while the second core handles communication or security tasks; 2 MB of on-chip Flash for large firmware images with dual-bank boot strategies; and a hardware cryptographic engine (CRYPTO per Microchip product pages) supporting secure firmware and data handling. The 120 MHz maximum core speed with the Cortex-M4 DSP instructions and single-precision FPU supports FFT-based metering computations efficiently. Technical depth: the device operates from a 1.2V core / 3.3V I-O supply domain structure (per FindIC verified data), supports industrial temperature ranges (IND TEMP per Mouser), and is offered in Microchip's MRLA (material declaration, green) packaging with RoHS-green LQFP construction. The two processors enable partitioned designs where metrology accuracy and network stack latency are addressed independently. Typical applications include smart electricity meters, energy monitoring gateways, industrial control nodes, and secure IoT data concentrators, where dual-core partitioning and cryptographic acceleration directly reduce external component count. Design consideration: as a dual-core device, partition Flash and SRAM between cores early in the design and verify the supply sequencing of the 1.2V core domain against the 3.3V I-O domain in the power tree. This page synthesizes distributor pricing (as of 2026-09-20), drop-in same-family alternatives, pinout/package data, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM4C32CA-AUR - Dual Cortex-M4 120MHz 2MB Flash MCU | Microchip
ATSAM4C32CA-AUR

ATSAM4C32CA-AUR - Dual Cortex-M4 120MHz 2MB Flash MCU | Microchip

The Microchip Technology ATSAM4C32CA-AUR is a 32-bit smart-energy microcontroller with two ARM Cortex-M4 RISC processor cores running at up to 120 MHz, 2 Mbytes of embedded Flash, and a 100-pin LQFP package in industrial temperature grade with hardware cryptography. A microcontroller (MCU) is a system-on-chip that integrates a processor core, memory, and peripherals on a single die, sitting at the lowest level of the embedded-computing hierarchy above discrete logic and below application processors. The SAM4C family targets metering and smart-energy systems-on-chip, where two cores allow one processor to run the metrology/security stack while the other handles communications and UI. Key features include dual 32-bit ARM Cortex-M4 RISC cores with a maximum clock speed of 120 MHz, 2048 KB (2 MB) of embedded Flash, an integrated hardware crypto engine, and industrial temperature operation. The CA suffix denotes the variant with the second Cortex-M4 core plus cryptographic acceleration; the ATSAM4C32 family pairs this with rich analog and connectivity peripherals typical of the Atmel/Microchip SAM4C platform. Technically, the device belongs to the SAM4C series described by Microchip as a complete system-on-chip solution for smart-energy applications built around two high-performance 32-bit ARM Cortex-M4 processors. The 1.2 V core supply with 3.3 V I/O rails reflects a modern low-power process, while the 100-pin LQFP surface-mount package offers a 0.5 mm lead pitch suitable for automated assembly. Typical applications include electricity meters, smart grid nodes, data concentrators, and industrial monitoring endpoints where on-chip cryptography protects billing and firmware integrity. Design consideration: budget dual-core debug capacity and plan Flash partitioning between the two cores early, since the security/communication workload split strongly influences board-level power and EMC behavior. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM4C32CA-AUT - Dual Cortex-M4 120MHz 2MB MCU | Microchip
ATSAM4C32CA-AUT

ATSAM4C32CA-AUT - Dual Cortex-M4 120MHz 2MB MCU | Microchip

The Microchip Technology ATSAM4C32CA-AUT is a 32-bit dual-core ARM Cortex-M4 microcontroller with 2 MB flash memory, 120 MHz maximum operating frequency, and cryptographic acceleration, housed in a 100-pin LQFP (14x14 mm) package for smart energy applications. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory (flash for program storage, SRAM for data), and peripherals such as UARTs, timers, and ADCs into one chip. Within the power management hierarchy, MCUs sit at the application level above simple logic ICs and below full application processors. The SAM4C series extends Microchip's SAM4 ARM Cortex-M4 family by pairing a primary Cortex-M4F with a second Cortex-M4 core, enabling functional partitioning in metering systems. Key features include dual 32-bit ARM Cortex-M4 RISC processors running at up to 120 MHz, 2 MB (2M x 8) of embedded flash, integrated crypto hardware (the -AUT device is listed with CRYPTO in distributor data), and industrial temperature qualification indicated by the Mouser listing descriptor "IND TEMP". These attributes let the part execute metrology computation on one core while handling communication or security on the other. Technically, the device is a system-on-chip solution purpose-built for smart energy applications according to Microchip's official ATSAM4C32 product page. The dual-core architecture reduces the need for an external security or communication co-processor in electricity meter designs. Typical applications include smart electricity meters, energy monitoring gateways, and industrial power-quality analyzers, where 2 MB of flash supports large firmware images plus OTA update staging. Design consideration: confirm the supply rail (3.3 V class, per the 3.3V listing in the datasheet archive data) and thermal budget before committing to the 100-LQFP footprint. This page synthesizes distributor pricing tiers, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM4C32CA-AUTR - Dual-Core 120MHz 2MB Flash MCU | Microchip
ATSAM4C32CA-AUTR

ATSAM4C32CA-AUTR - Dual-Core 120MHz 2MB Flash MCU | Microchip

The Microchip Technology ATSAM4C32CA-AUTR is a 32-bit dual-core ARM Cortex-M4 microcontroller running at 120 MHz with 2 MB of embedded flash memory, integrated cryptographic hardware acceleration, and an industrial-temperature LQFP-100 (14x14 mm) surface-mount package delivered in tape and reel format. Operating from a single 3.3V supply, it is engineered as a system-on-chip solution for smart energy and secure connected applications. A microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, memory, and peripherals. Within the power-management hierarchy, the SAM4C family sits above simple single-core MCUs: it integrates two ARM Cortex-M4 RISC processors, allowing one core to run the main application while the second handles communication, metering calculations, or security tasks, effectively replacing a discrete coprocessor. Key differentiating features include the dual-core Cortex-M4 architecture (with floating-point unit, i.e., Cortex-M4F support), 2 MB (2M x 8) of on-chip flash for dual-bank firmware images, hardware cryptographic acceleration (per the Mouser designation CRYPTO), and industrial temperature qualification. These attributes directly target three-phase electricity metering and secure IoT endpoints. Technically, each Cortex-M4 core executes at up to 120 MHz, delivering high single-cycle DSP performance with hardware divide and SIMD instructions. The flash density supports large RTOS-based stacks such as FreeRTOS and dual-image OTA upgrades. The crypto engine offloads AES and related algorithms from software, reducing CPU load and improving side-channel resistance for billing-grade security. Typical applications include smart energy meters, data concentrators in smart-grid infrastructure, secure industrial gateways, and IoT sensor hubs requiring both compute headroom and cryptographic protection. The dual-core design isolates metering firmware from network stacks for improved robustness. Design consideration: confirm the exact SRAM size, peripheral set, and pinout from the official Microchip ATSAM4C32 datasheet before layout, and verify land pattern dimensions against the 14x14 mm LQFP-100 footprint. This page synthesizes distributor pricing (as of 2026-09-20), drop-in same-family alternatives, and practical design guidance not found in the manufacturer datasheet alone.

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ATSAM4C4CB-AU - Dual Cortex-M4 120MHz MCU 256KB | Microchip
ATSAM4C4CB-AU

ATSAM4C4CB-AU - Dual Cortex-M4 120MHz MCU 256KB | Microchip

The Microchip Technology ATSAM4C4CB-AU is a 32-bit dual-core ARM Cortex-M4 microcontroller operating at up to 120 MHz with 256 KB of embedded Flash and 152 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) surface-mount package with a 1.62V to 3.6V supply range. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, forming the lowest tier of the embedded processor hierarchy (MCU -> system-on-chip -> embedded processor -> semiconductor). The SAM4C series is a smart-energy system-on-chip family, meaning each die integrates two CPU cores plus metering-oriented peripherals such as cryptographic acceleration. Key features include the dual ARM Cortex-M4 RISC cores each with on-chip cache, hardware cryptography (AES) acceleration, 256 Kbytes of embedded Flash (256K x 8), and 120 MHz maximum core speed. The cryptographic engine offloads security-critical computation from the main core, which is significant for revenue-grade smart meters where firmware must perform authenticated communication without sacrificing metering real-time performance. Technically, the dual-core architecture allows functional partitioning: one core typically runs the metering/application stack while the second handles communication or security tasks, improving determinism and fault isolation. The on-chip cache for each core compensates for Flash wait states at 120 MHz, sustaining high effective throughput from the 256 KB program memory. Typical applications include smart electricity meters, energy monitoring gateways, industrial data concentrators, and secure IoT nodes - use cases that benefit from the integrated crypto engine and dual-core processing headroom. Design consideration: the 1.62V to 3.6V supply window accommodates 3.3V systems, but at 120 MHz designers must verify Flash accelerator settings and power budget against the datasheet electrical characteristics before finalizing the power tree. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-20.

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ATSAM4C4CB-AUR - Dual Cortex-M4 120MHz MCU 256KB | Microchip (Tape & Reel)
ATSAM4C4CB-AUR

ATSAM4C4CB-AUR - Dual Cortex-M4 120MHz MCU 256KB | Microchip (Tape & Reel)

The Microchip Technology ATSAM4C4CB-AUR is a 32-bit dual-core ARM Cortex-M4 microcontroller operating at up to 120 MHz with 256 KB of embedded Flash and 152 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) surface-mount package with a 1.62V to 3.6V supply range. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, forming the lowest tier of the embedded processor hierarchy (MCU -> system-on-chip -> embedded processor -> semiconductor). The SAM4C series is a smart-energy system-on-chip family, meaning each die integrates two CPU cores plus metering-oriented peripherals such as cryptographic acceleration. Key features include the dual ARM Cortex-M4 RISC cores each with on-chip cache, hardware cryptography (AES) acceleration, 256 Kbytes of embedded Flash (256K x 8), and 120 MHz maximum core speed. The cryptographic engine offloads security-critical computation from the main core, which is significant for revenue-grade smart meters where firmware must perform authenticated communication without sacrificing metering real-time performance. Technically, the dual-core architecture allows functional partitioning: one core typically runs the metering/application stack while the second handles communication or security tasks, improving determinism and fault isolation. The on-chip cache for each core compensates for Flash wait states at 120 MHz, sustaining high effective throughput from the 256 KB program memory. Typical applications include smart electricity meters, energy monitoring gateways, industrial data concentrators, and secure IoT nodes - use cases that benefit from the integrated crypto engine and dual-core processing headroom. Design consideration: the 1.62V to 3.6V supply window accommodates 3.3V systems, but at 120 MHz designers must verify Flash accelerator settings and power budget against the datasheet electrical characteristics before finalizing the power tree. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-20.

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ATSAM4C8CA-AU - Dual-Core 120MHz 512KB MCU | Microchip
ATSAM4C8CA-AU

ATSAM4C8CA-AU - Dual-Core 120MHz 512KB MCU | Microchip

The Microchip Technology ATSAM4C8CA-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller running at 120 MHz with 512 KB of embedded Flash and 128 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) surface-mount package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest tier of the embedded processing hierarchy: MCU -> embedded processor -> system-on-chip (SoC) -> application processor. The ATSAM4C8CA-AU belongs to Microchip (Atmel) SAM4C family of flash-based ARM microcontrollers designed for secure, connected industrial and consumer systems. Key differentiating features include a true dual-core architecture with a secondary Cortex-M4 core dedicated to security processing, an Advanced Cryptographic Engine (ACE), anti-tamper protection, and a hardware Floating Point Unit (FPU). Peripheral density is high: five USARTs, two UARTs, two TWI (I2C) interfaces, up to seven SPI-capable serial multiplexed lines, PWM timers, and two 3-channel general-purpose 16-bit timers. The dual-core SAM4C architecture offloads security functions such as AES/DES transactions from the main core, sustaining real-time control latency on the primary core while the second core manages cryptographic authentication. A 16-bit external bus interface (EBI/EMI) extends program and data memory off-chip. An 8-channel 10-bit ADC handles analog sensing inputs. Typical applications include secure smart-metering endpoints, industrial control panels, IoT gateways, and POS/secure authentication terminals where tamper resistance and encrypted communication are mandatory. Design consideration: the EBI 16-bit external bus makes the ATSAM4C8CA-AU ideal when 128 KB of internal SRAM is insufficient, but EBI trace routing on a 100-pin LQFP requires length-matched layout for reliable operation at full speed. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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