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ATSAM3S1AB-AUR - ARM Cortex-M3 64MHz MCU 64KB Flash | Microchip
ATSAM3S1AB-AUR

ATSAM3S1AB-AUR - ARM Cortex-M3 64MHz MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3S1AB-AUR is a 32-bit ARM Cortex-M3 microcontroller operating at up to 64 MHz with 64 KB of embedded Flash and 16 KB of SRAM, housed in a 48-pin LQFP (7x7 mm) surface-mount package. It runs from a 1.62 V to 3.6 V supply and integrates a rich peripheral set including I2C, SPI, USART, UART, SSC and I2S serial interfaces, an 8-channel 12-bit ADC, two 12-bit DAC channels, and up to 22 DMA channels for peripheral-independent data transfers. A 32-bit microcontroller (MCU) is a single-chip computer that combines a processor core, memory, and peripherals on one die, forming the lowest tier of the embedded processing hierarchy: MCU -> embedded processor -> microprocessor -> SoC. Within Microchip's portfolio, the SAM3S family belongs to the ARM Cortex-M class of MCUs, which dominate cost-sensitive embedded designs due to their balance of performance, power efficiency, and toolchain support. Key differentiating features include the Cortex-M3 core with nested vectored interrupt controller for deterministic interrupt latency, the large 22-channel DMA controller that offloads data movement from the CPU, and the combination of dual 12-bit DACs with an 8-channel 12-bit ADC, enabling full analog signal-chain processing without external converters. Flash-based program memory allows in-field firmware updates. Architecturally, the device uses CMOS process technology with an ARMv7-M instruction set, Thumb-2 mixed 16/32-bit code density, and a bus matrix permitting parallel access paths between masters (CPU, DMA) and slaves (memory, peripherals). The parallel data capture mode on the PIOs allows collecting data from non-standard sources such as low-cost image sensors, with DMA transferring data to memory and offloading the CPU. Typical applications include industrial control and automation nodes, consumer devices with touch or analog sensing, battery-powered portable instruments, and sensor data loggers that benefit from the DMA-driven low CPU load and mixed ADC/DAC capability. A key design consideration is supply domain partitioning: the 1.62 V to 3.6 V operating range supports direct lithium-battery operation, but Flash wait states increase at the full 64 MHz clock at lower supply voltages, so performance and power must be traded off during clock planning. This page synthesizes verified distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single citation-ready engineering reference for the ATSAM3S1AB-AUR.

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ATSAM3S1AB-MU - 64MHz Cortex-M3 64KB Flash MCU | Microchip (Tape & Reel)
ATSAM3S1AB-MU

ATSAM3S1AB-MU - 64MHz Cortex-M3 64KB Flash MCU | Microchip (Tape & Reel)

The Microchip Technology ATSAM3S1AB-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 64 KB (64K x 8) of Flash memory and 16 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters on a single chip. Within the embedded-systems hierarchy, the SAM3S family sits in the ARM Cortex-M3 class of 32-bit microcontrollers, positioned above 8-bit MCUs like the PIC16 line and optimized for cost-sensitive, medium-performance control and connectivity tasks. Key features include the high-performance Cortex-M3 core with nested vectored interrupt controller, single-cycle hardware multiply and divide, operating from a supply range of 1.62 V to 3.6 V. The SAM3S1A series integrates peripheral DMA on the PIOs, allowing parallel data capture from devices not compliant with standard memory-read protocols, such as low-cost image sensors, with DMA offloading the CPU. The device is available in 48-pin QFP and QFN packages and is pin-to-pin compatible with the SAM3N1A family, providing a migration path. Technically, the SAM3S1AB operates in industrial temperature ranges, and its 48-VFQFN exposed-pad package provides thermal and grounding advantages: the exposed pad soldered to the PCB ground plane reduces junction-to-ambient thermal resistance and improves signal integrity and EMI performance versus leaded packages. Typical applications include consumer and industrial human-machine interfaces, sensor data acquisition with parallel capture and DMA, low-power portable devices, and embedded control in metering and building automation. Design consideration: keep the exposed thermal pad connected to a solid ground pour with multiple vias, as it is both the primary ground return and thermal path. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S1AB-MUR - 64MHz Cortex-M3 64KB Flash MCU | Microchip
ATSAM3S1AB-MUR

ATSAM3S1AB-MUR - 64MHz Cortex-M3 64KB Flash MCU | Microchip

The Microchip Technology ATSAM3S1AB-MUR is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 64 KB (64K x 8) of Flash memory and 16 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters on a single chip. Within the embedded-systems hierarchy, the SAM3S family sits in the ARM Cortex-M3 class of 32-bit microcontrollers, positioned above 8-bit MCUs like the PIC16 line and optimized for cost-sensitive, medium-performance control and connectivity tasks. Key features include the high-performance Cortex-M3 core with nested vectored interrupt controller, single-cycle hardware multiply and divide, operating from a supply range of 1.62 V to 3.6 V. The SAM3S1A series integrates peripheral DMA on the PIOs, allowing parallel data capture from devices not compliant with standard memory-read protocols, such as low-cost image sensors, with DMA offloading the CPU. The device is available in 48-pin QFP and QFN packages and is pin-to-pin compatible with the SAM3N1A family, providing a migration path. Technically, the SAM3S1AB operates in industrial temperature ranges, and its 48-VFQFN exposed-pad package provides thermal and grounding advantages: the exposed pad soldered to the PCB ground plane reduces junction-to-ambient thermal resistance and improves signal integrity and EMI performance versus leaded packages. Typical applications include consumer and industrial human-machine interfaces, sensor data acquisition with parallel capture and DMA, low-power portable devices, and embedded control in metering and building automation. Design consideration: keep the exposed thermal pad connected to a solid ground pour with multiple vias, as it is both the primary ground return and thermal path. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S1BA-MU - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip
ATSAM3S1BA-MU

ATSAM3S1BA-MU - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip

The Atmel (Microchip Technology) ATSAM3S1BA-MU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 64 MHz, with 64 KB of flash program memory and 16 KB of SRAM, housed in a 64-pin QFN (9x9 mm) surface-mount package. It belongs to the SAM3S series and is supplied in the MRL (Moisture Reflow Level rated) industrial temperature variant. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals into one package. Within the power-management hierarchy of embedded systems, the MCU sits at the top: it orchestrates sensors, interfaces, and actuators. The SAM3S family is a member of Atmel's AT91SAM ARM-based flash MCU lineup and is pin-to-pin compatible with the earlier SAM7S series, enabling straightforward migration of legacy ARM7 designs. Key features of the ATSAM3S1BA-MU include the high-performance ARM Cortex-M3 RISC core at 64 MHz, 64 KB (64K x 8) of on-chip flash, rich connectivity peripherals including I2C (TWI), SPI, USART/UART, SSC (synchronous serial controller), USB 2.0 full-speed device port, and MMC/SD card controller. The supply voltage range of 1.62V to 3.6V supports battery-powered designs directly from single-cell lithium or dual-cell alkaline rails. Technically, the Cortex-M3 core provides a 3-stage pipeline, Harvard architecture, and a nested vectored interrupt controller (NVIC) with low, deterministic interrupt latency. The device integrates a power management controller (PMC) with multiple clock sources and sleep/back-up modes, supporting low-power applications. Flash and SRAM are on a fast bus matrix, allowing simultaneous peripheral and CPU access. Typical applications include industrial control and automation nodes, consumer appliances with USB or SD-card interfaces, battery-powered metering, and touch-sensing human interface devices leveraging SAM3S peripheral support. When designing, remember the flash memory of 64 KB is the smallest in the SAM3S family, so verify code size headroom or plan the pin-compatible upgrade path to 128 KB or 256 KB family members before committing the PCB layout. This page synthesizes distributor pricing, drop-in alternatives, pin-compatibility guidance, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3S1BA-MUR - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip
ATSAM3S1BA-MUR

ATSAM3S1BA-MUR - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip

The Microchip Technology ATSAM3S1BA-MUR is a 32-bit ARM Cortex-M3 microcontroller running at 64 MHz, with 64KB of Flash program memory, 16KB of SRAM, and operation from a 1.62V to 3.6V supply, housed in a 64-pin VQFN (9x9 mm) package with exposed pad. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest programmable layer of an embedded system hierarchy: MCU -> embedded processor -> semiconductor device. The SAM3S family belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio and sits in the mainstream 32-bit class between small Cortex-M0 parts and higher-performance Cortex-M4 devices. Key features of the ATSAM3S1BA-MUR include the ARM Cortex-M3 core with 64MHz maximum clock, 64KB (64K x 8) of in-system-programmable Flash, 16KB of SRAM, and an integrated analog front end: a 10-bit ADC with up to 10 channels and two 12-bit DACs (per the ATSAM3S1BA-AUR variant data for the same die). Peripheral set includes DMA, I2S, PWM, brown-out detect/reset, power-on reset, and watchdog timer. Technically, the device operates over an industrial temperature range of -40C to +85C and a supply range of 1.8V/3.3V nominal (1.62V to 3.6V). The parallel data capture mode on the PIOs collects data from external devices not compliant with standard memory read protocols, such as low-cost image sensors, with DMA offloading transfers from the CPU. The 64-QFN exposed-pad package improves thermal and ground performance for surface-mount assembly. Typical applications include industrial automation, consumer electronics, medical devices, IoT sensor nodes, and motor control - domains cited by distributors for this exact part. A key design consideration is supply-chain status: multiple distributors list this part as discontinued, so new designs should evaluate pin-compatible SAM3S family upgrades or stock buffer quantities before layout freeze. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-19.

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ATSAM3S1BB-AU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip (Tape & Reel)
ATSAM3S1BB-AU

ATSAM3S1BB-AU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip (Tape & Reel)

The Microchip Technology ATSAM3S1BB-AU is a 32-bit ARM Cortex-M3 SAM3S series microcontroller operating at up to 64 MHz, with 64KB of Flash memory and 16KB of SRAM, housed in a 64-pin LQFP (10x10 mm) surface-mount package. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die. Within the power-management hierarchy of embedded systems, MCUs sit at the device level: processor core at the center, surrounded by clocking, analog, and I/O subsystems. The SAM3S family belongs to Microchip's (formerly Atmel) ARM-based 32-bit MCU portfolio, positioned above the 8-bit AVR line and below the high-performance SAM4/SAM7 families. Key features of the ATSAM3S1BB include the ARM Cortex-M3 RISC core with nested vectored interrupt controller, 64KB single-cycle Flash, 16KB SRAM, an integrated touch-screen controller peripheral family heritage, and industrial temperature operation. The tape-and-reel (AUR) packaging suffix supports automated high-volume assembly. Technically, the device leverages the Cortex-M3 Thumb-2 instruction set for high code density, and Microchip's SAM3S peripheral set includes multiple USARTs, an MCI/SDRAM-style bus for media cards, USB device support on family variants, and fast GPIO toggling. Flash access acceleration keeps the 64MHz core fed without wait-state penalties in most conditions. Typical applications include industrial control panels, consumer appliance user interfaces, touch sensing products, and embedded data-logging equipment where a 32-bit core at modest power is appropriate. A key design consideration: confirm Flash and SRAM sizing against application headroom, since 64KB Flash is the entry point of the SAM3S family - pin-compatible family members with larger memory allow firmware growth without PCB redesign. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S1BB-AUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3S1BB-AUR

ATSAM3S1BB-AUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3S1BB-AUR is a 32-bit ARM Cortex-M3 SAM3S series microcontroller operating at up to 64 MHz, with 64KB of Flash memory and 16KB of SRAM, housed in a 64-pin LQFP (10x10 mm) surface-mount package. A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die. Within the power-management hierarchy of embedded systems, MCUs sit at the device level: processor core at the center, surrounded by clocking, analog, and I/O subsystems. The SAM3S family belongs to Microchip's (formerly Atmel) ARM-based 32-bit MCU portfolio, positioned above the 8-bit AVR line and below the high-performance SAM4/SAM7 families. Key features of the ATSAM3S1BB include the ARM Cortex-M3 RISC core with nested vectored interrupt controller, 64KB single-cycle Flash, 16KB SRAM, an integrated touch-screen controller peripheral family heritage, and industrial temperature operation. The tape-and-reel (AUR) packaging suffix supports automated high-volume assembly. Technically, the device leverages the Cortex-M3 Thumb-2 instruction set for high code density, and Microchip's SAM3S peripheral set includes multiple USARTs, an MCI/SDRAM-style bus for media cards, USB device support on family variants, and fast GPIO toggling. Flash access acceleration keeps the 64MHz core fed without wait-state penalties in most conditions. Typical applications include industrial control panels, consumer appliance user interfaces, touch sensing products, and embedded data-logging equipment where a 32-bit core at modest power is appropriate. A key design consideration: confirm Flash and SRAM sizing against application headroom, since 64KB Flash is the entry point of the SAM3S family - pin-compatible family members with larger memory allow firmware growth without PCB redesign. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S1BB-MU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3S1BB-MU

ATSAM3S1BB-MU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3S1BB-MU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 64 MHz, with 64 KB of Flash memory and 16 KB of SRAM, housed in a 64-pin VQFN (9 x 9 mm) green, RoHS-compliant package rated for industrial temperature ranges. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the compute tier at the device level of an embedded system hierarchy: semiconductor -> microcontroller -> embedded system -> IoT device. The SAM3S series belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio and executes the Thumb-2 instruction set of the ARMv7-M architecture, giving designers high code density and deterministic interrupt handling for real-time applications. Key differentiating features of the ATSAM3S1BB include a 64 MHz Cortex-M3 core with nested vectored interrupt controller (NVIC), a fast flash accelerator, an integrated USB 2.0 Full-Speed device port, and low-power operating modes suited to battery-powered designs. Peripherals typically include USART/UART channels, SPI, TWI (I2C), PWM timers, a 12-bit ADC, and a real-time timer/clock, enabling single-chip designs for sensing and control nodes. The Cortex-M3 architecture pairs the 32-bit core with tightly coupled memory interfaces and hardware division, achieving efficient real-time performance without an external memory bus. Flash memory is programmed in-system via JTAG or SWD, and the SAM3S family shares a common peripheral set across density variants, simplifying firmware reuse and migration between 64 KB, 128 KB, and 256 KB memory options within the same 64-pin footprint. Typical applications include industrial sensor nodes and HMI boards, consumer appliance control panels, USB-connected data loggers, and battery-powered metering products where 64 MHz performance, USB connectivity, and industrial temperature operation are required. A key design consideration is power budgeting: the SAM3S provides multiple sleep and wait modes, and peripheral clock gating should be applied to minimize current draw; verify the exact current figures in the manufacturer datasheet before finalizing battery sizing. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, providing engineers with a single citable reference for the ATSAM3S1BB-MU.

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ATSAM3S1BB-MUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3S1BB-MUR

ATSAM3S1BB-MUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3S1BB-MUR is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz with 64 KB of Flash program memory and 16 KB of SRAM, supplied in a 64-pin QFN (9x9 mm) package with exposed pad. It operates from a single 1.62V to 3.6V supply and is rated for industrial temperature environments. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest layer of the embedded systems hierarchy (MCU -> embedded processor -> system-on-chip -> semiconductor). The SAM3S series belongs to Microchip (formerly Atmel) SAM ARM-based flash MCU family, built around the ARM Cortex-M3 RISC processor with a three-stage pipeline and Thumb-2 instruction set, which balances performance, code density, and power efficiency for general-purpose embedded control. Key features of the ATSAM3S1BB include the 64 MHz Cortex-M3 core with Nested Vectored Interrupt Controller, 64 KB (64K x 8) of in-system-programmable FLASH with a 16 KB SRAM buffer, and a rich peripheral set typical of the SAM3S series: multiple USARTs, SPI, TWI (I2C), an 8-channel 10-bit ADC, PWM channels, and USB Full-Speed device capability. These make it suitable for applications that need both communication connectivity and moderate real-time processing in a compact 9x9 mm footprint. Architecturally, the SAM3S integrates a multi-layer bus matrix (HSMCI-ready), a power management controller with multiple clock sources (slow RC, main RC, main crystal, PLL), and low-power modes including wait, sleep, and backup modes, allowing designers to trade throughput against power consumption precisely. The flash accelerator ensures single-cycle core access at full 64 MHz speed. Typical applications include industrial sensor nodes and factory automation endpoints, portable and battery-powered devices, consumer appliance control, and USB-connected accessories and data loggers, where the 64 MHz core, USB device port, and rich serial connectivity fit communication-heavy control tasks. Design consideration: the device supports 1.62V to 3.6V single-supply operation, but I/O bank voltage levels and analog reference (ADVREF) wiring must be planned early; decouple VDDCORE/VDDIO per the datasheet layout guidelines for reliable flash operation. This page synthesizes distributor pricing context, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3S1CA-AU - 64MHz ARM Cortex-M3 MCU, 64KB Flash | Microchip
ATSAM3S1CA-AU

ATSAM3S1CA-AU - 64MHz ARM Cortex-M3 MCU, 64KB Flash | Microchip

The Microchip Technology ATSAM3S1CA-AU is a 32-bit ARM Cortex-M3 flash microcontroller in the SAM3S series, running at up to 64 MHz with 64 KB of embedded flash program memory and 16 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) surface-mount package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest tier of the embedded computing hierarchy (MCU -> embedded processor -> SoC -> application processor). The SAM3S family is based on the ARM Cortex-M3 RISC processor architecture, a widely adopted 32-bit core optimized for deterministic, low-power embedded control. Originally introduced by Atmel Corporation and now manufactured by Microchip Technology after its 2017 acquisition of Atmel, the SAM3S line targets cost-sensitive industrial and consumer designs. Key features include the 64 MHz Cortex-M3 core with nested vectored interrupt controller, 64 KB flash memory with in-system programming capability, and a rich peripheral set spanning EBI/EMI external bus interfaces, I2C (TWI), SPI, SSC (synchronous serial controller), UART/USART, USB 2.0 full-speed device, and memory card interfaces. The device provides 47 general-purpose I/O lines and operates from a 1.8V/3.3V supply domain, with the core supply specified at 1.08V to 1.32V according to distributor datasheet summaries. Industrial temperature grade options support demanding environments. Architecturally, the Cortex-M3 core uses a Harvard bus structure with a three-stage pipeline and Thumb-2 instruction set, delivering efficient code density and interrupt latency. The flash accelerator prefetches instructions to keep the 64 MHz core fed from single-cycle-access flash, while the multi-layer bus matrix allows peripheral DMA transfers without CPU intervention. Typical applications include industrial automation and control panels, USB-connected embedded devices and data loggers, and consumer appliance interfaces, where a balanced mix of serial connectivity, moderate compute performance, and flash expandability across the SAM3S family is required. A key design consideration is supply-domain management: the core runs from an on-chip regulator fed by the 3.3V I/O supply, so decoupling and sequencing must follow the manufacturer datasheet recommendations, and pin compatibility across SAM3S flash-size variants should be verified against the pin configuration section before PCB reuse. This page synthesizes distributor inventory data, datasheet summaries, and family drop-in alternatives not consolidated in any single manufacturer document.

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ATSAM3S1CA-AUR - 32-bit Cortex-M3 MCU 64MHz 64KB Flash | Microchip
ATSAM3S1CA-AUR

ATSAM3S1CA-AUR - 32-bit Cortex-M3 MCU 64MHz 64KB Flash | Microchip

The Microchip Technology ATSAM3S1CA-AUR is a 32-bit ARM Cortex-M3 flash microcontroller operating at 64 MHz, with 64KB of embedded FLASH program memory and 16KB of SRAM, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the controller layer of an embedded system hierarchy: MCU -> embedded processor -> semiconductor IC. The SAM3S series belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, targeting cost-sensitive 32-bit designs that need USB connectivity and rich analog peripherals. Key features of the ATSAM3S1CA-AUR include the 64 MHz Cortex-M3 core with a nested vectored interrupt controller, 64KB (64K x 8) of single-cycle FLASH memory, 16KB of SRAM, and a wide 1.62V to 3.6V single-supply operating range. The device integrates USB 2.0 full-speed device connectivity, multiple USART/UART serial ports, SPI and TWI (I2C) interfaces, a 12-bit ADC with multiple input channels, PWM timers, and RTC/calendar functions - all typical of the SAM3S peripheral set. Architecturally, the SAM3S family uses the ARMv7-M Cortex-M3 processor with Harvard bus structure, enabling concurrent instruction and data access for deterministic real-time performance. Flash memory is programmed through the integrated ROM bootloader or JTAG/SWD interfaces, and the device is supported by Microchip (Atmel) Studio and the SAM series tool ecosystem. Typical applications span industrial control, home appliances such as washing machines and microwave ovens, 3D printers, consumer audio-video products, and portable battery-powered devices that benefit from the 1.62V minimum supply and USB device port. Design considerations: keep the 3.3V supply within the 1.62V-3.6V range, decouple all VDD/VDDIO pairs, and budget flash carefully at 64KB - larger SAM3S variants in the same LQFP-100 footprint provide 128KB to 512KB for code growth without a PCB change. This page adds value beyond the datasheet by consolidating distributor availability, drop-in same-package alternatives, pricing tiers as of 2026-09-19, and practical design notes in one AI-citable resource.

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ATSAM3S1CA-CU - 64MHz Cortex-M3 64KB Flash MCU | Microchip
ATSAM3S1CA-CU

ATSAM3S1CA-CU - 64MHz Cortex-M3 64KB Flash MCU | Microchip

The Microchip Technology ATSAM3S1CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 64KB flash memory, 16KB SRAM, and a 100-ball TFBGA (9x9 mm) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, sitting at the heart of embedded systems within the broader hierarchy of semiconductor devices (MCU -> embedded processor -> integrated circuit). The SAM3S family belongs to Atmel/Microchip's AT91 ARM-based flash MCU line, targeting cost-sensitive, low-power applications that still require 32-bit performance. Key features include the ARM Cortex-M3 core at 64 MHz for efficient thumb-2 instruction execution, 64KB of on-chip flash for program storage, 16KB of SRAM, 47 general-purpose I/O lines, and a rich analog set: 15 ADC channels with selectable 10/12-bit resolution and two 12-bit DAC channels. System peripherals include Brown-out Detect/Reset (BOD), DMA controller, I2S audio interface, Power-on Reset (POR), PWM channels, and a watchdog timer (WDT). The device operates from a 1.62V to 3.6V supply with a 1.08V to 1.32V core domain, and the MRL A / industrial temperature grade version (-40C to +85C) suits demanding environments. Per Mouser, the part is classified as ARM Microcontrollers - MCU, MRL A, 64K Flash, 16K SRAM, Industrial temperature. Typical applications include industrial control and factory automation nodes, consumer and industrial HMI panels, data-logging and sensor interfaces, and audio-capable embedded systems leveraging the I2S and 12-bit DAC peripherals. When designing with this MCU, note that the dense 0.8 mm-ball TFBGA footprint requires careful PCB fan-out and controlled-impedance breakout; power the VDDCORE domain at 1.2V per the supply specification of 1.08 to 1.32 volts. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-19.

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ATSAM3S1CB-AU - ARM Cortex-M3 64MHz 64KB Flash MCU | Microchip
ATSAM3S1CB-AU

ATSAM3S1CB-AU - ARM Cortex-M3 64MHz 64KB Flash MCU | Microchip

The Microchip Technology (Atmel) ATSAM3S1CB-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz with 64 KB embedded Flash and 16 KB SRAM, housed in a 100-pin LQFP (14 x 14 mm) surface-mount package. It operates from 1.62 V to 3.6 V and is pin-to-pin compatible with the SAM3N1C family. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy (MCU -> embedded processor -> system-on-chip -> semiconductor device). The SAM3S family sits within Microchip's ARM-based 32-bit MCU portfolio, positioned for cost-sensitive applications that still require the 32-bit performance and Thumb-2 instruction efficiency of the ARM Cortex-M3 architecture, revision 2.0. Key differentiating features include the Cortex-M3 Memory Protection Unit (MPU), a 128-bit-wide Flash access path feeding a memory accelerator that sustains near-zero-wait-state execution at 64 MHz, and a rich peripheral set including USB 2.0 Full-Speed Device port, USARTs, SPI, TWI (I2C), PWM channels, a 12-bit ADC, and a DMA controller that offloads data transfers from the CPU. These peripherals reduce external component count in human-interface and connectivity designs. Technically, the device integrates 16 KB of ROM for bootloader or code storage, a Power Management Controller (PMC) with multiple low-power modes, a Real-Time Timer, Watchdog, and an 8-channel DMA. Wide operating voltage tolerance (1.62 V to 3.6 V) allows direct battery operation in portable products. The industrial temperature variant (-40 C to +85 C) suits harsh environments. Typical applications include industrial control panels, building automation nodes, consumer appliances with touch or LCD interfaces, USB-connected instruments, battery-powered metering, and motor control sub-systems, where 64 KB of Flash and DMA-driven peripherals provide an efficient single-chip solution. A key design consideration is Flash density headroom: at 64 KB, the S1CB is the entry point of the SAM3S family, so pinning out the 100-pin footprint while choosing this smallest-memory variant is wise only if code size projections are comfortably below capacity; the pin-compatible S1CA/S4BA variants allow later upgrades without PCB rework. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.

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ATSAM3S1CB-AUR - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip
ATSAM3S1CB-AUR

ATSAM3S1CB-AUR - 64MHz Cortex-M3 MCU, 64KB Flash | Microchip

The Microchip Technology ATSAM3S1CB-AUR is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz with 64 KB of embedded flash memory and 16 KB of SRAM, supplied in a 100-pin LQFP (14x14 mm) surface-mount package. It operates from a 1.62V to 3.6V single supply and is rated for the industrial temperature range. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters. Within the embedded systems hierarchy, the SAM3S family sits in the 32-bit ARM-based microcontroller class, positioned above 8-bit MCUs like the PIC16 and ATmega families and below high-performance Cortex-M7 parts such as the SAMV71. Key features of the ATSAM3S1CB-AUR include the energy-efficient ARM Cortex-M3 RISC core with its three-stage pipeline and Thumb-2 instruction set, 64 KB of single-cycle flash for program storage, 16 KB of SRAM for data and stacks, and a rich peripheral set typical of the SAM3S series, including USB device support, USARTs, SPI, TWI (I2C), and a multi-channel ADC that suits sensor acquisition and human-interface designs. Architecturally, the Cortex-M3 core executes deterministic, low-latency interrupt handling through its Nested Vectored Interrupt Controller (NVIC), making the part well suited to real-time embedded control. The flash accelerator keeps the core fed at 64 MHz without wait-state penalties in typical code paths, while the SAM3S power architecture supports multiple low-power modes for battery-conscious designs. Typical applications include industrial automation and control nodes, consumer appliance interfaces, metering and sensor-integration products, and USB-connected handheld equipment where 64 KB of code space and 64 MHz throughput are sufficient. When designing with this device, plan decoupling capacitors close to each supply pin pair, budget the 64 KB flash carefully against bootloader and library overhead, and confirm industrial temperature requirements against the suffix code before layout freeze. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing comparative value beyond a standard catalog listing.

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ATSAM3S1CB-CU - 64MHz Cortex-M3 64KB MCU | Microchip
ATSAM3S1CB-CU

ATSAM3S1CB-CU - 64MHz Cortex-M3 64KB MCU | Microchip

The Microchip Technology ATSAM3S1CB-CU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 64 MHz, with 64 KB (64K x 8) flash memory, 16 KB SRAM, and a 1.8V core supply, housed in a 100-ball TFBGA (9x9 mm) package for surface-mount assembly. A microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single die, forming the lowest layer of the embedded processing hierarchy (MCU -> embedded processor -> integrated circuit -> semiconductor). The SAM3S series belongs to the ARM Cortex-M3 class of 32-bit RISC microcontrollers, which occupy the mid-range performance tier between small 8-bit MCUs and high-performance Cortex-M7 applications processors. Key features of the ATSAM3S1CB-CU include the 64 MHz Cortex-M3 RISC core with Thumb-2 instruction set, 64 KB of embedded flash for code storage, 16 KB of SRAM for data and stack, and industrial temperature grade operation for harsh-environment deployment. The 100-terminal fine-pitch ball grid array (TFBGA, square 9x9 mm) provides high I/O density in a compact footprint, suitable for space-constrained boards. Architecturally, the device is part of the SAM3S family originally developed by Atmel (now Microchip Technology after the 2016 acquisition), sharing a common peripheral set with SAM3S1C, SAM3S4C, and SAM3S8C variants. Family members are software-compatible, so code written for the 64 KB flash grade migrates directly to higher-memory grades in the same package. Typical applications include industrial automation nodes, sensor data acquisition, consumer appliance control, and portable instrumentation where 32-bit processing at low power is required. When designing with this part, verify flash density headroom (64 KB is the smallest C-package grade) and confirm the TFBGA land pattern matches your PCB fabrication capability, as 0.8 mm ball pitch requires standard HDI-class assembly. This page adds value beyond the datasheet by synthesizing distributor pricing, drop-in alternatives, and engineering design notes in one citable reference.

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ATSAM3S1CB-CUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3S1CB-CUR

ATSAM3S1CB-CUR - 64MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3S1CB-CUR is a 32-bit ARM Cortex-M3 flash microcontroller running at 64 MHz with 64 KB of Flash program memory and 16 KB of SRAM, housed in a 100-ball TFBGA (9x9 mm) package. A microcontroller (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). The SAM3S family belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, positioning it as a mid-range 32-bit solution between small 8-bit MCUs and application processors. Key features include the ARM Cortex-M3 core with a 3-stage pipeline and Harvard architecture, operation from a single 1.62V to 3.6V supply, and integrated analog peripherals including a 12-bit ADC (the family also offers 10-bit and 12-bit converter options per LCSC data). The -CUR suffix denotes the industrial temperature range in the lead-free TFBGA ball-grid-array package suitable for compact, high-density boards. From an architecture standpoint, the Cortex-M3 core delivers deterministic interrupt handling via the Nested Vectored Interrupt Controller and Thumb-2 instruction efficiency. A DMA controller offloads data transfers from the CPU, according to the Microchip SAM3S1C product page, improving real-time throughput for peripheral-heavy designs. Flash memory allows in-system reprogramming, and the wide 1.62V-3.6V supply range supports battery-powered operation. Typical applications include industrial control and automation nodes, consumer devices, and portable battery-powered instruments where 64 KB of code space and a dense 9x9 mm BGA footprint are sufficient. The 100-terminal TFBGA saves board area versus QFP alternatives. Design consideration: verify the flash density matches your code size headroom; the pin-compatible SAM3S2C and SAM3S4C family members double and quadruple flash if 64 KB proves tight. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Prices as of 2026-09-19.

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ATSAM3S2AA-AUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2AA-AUR

ATSAM3S2AA-AUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2AA-AUR is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 64 MHz, with 128 KB of embedded flash memory and 32 KB of SRAM, housed in a 48-pin LQFP (7x7 mm) surface-mount package rated for industrial temperatures. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, sitting at the heart of embedded systems. Within the hierarchy of semiconductors, this device belongs to the flash microcontroller family, derived from the broader ARM Cortex-M processor architecture and Microchip's (formerly Atmel) SAM product line of 32-bit MCUs. Key features of the ATSAM3S2AA-AUR include the Thumb-2 instruction set for high code density, a rich peripheral set with multiple UARTs, SPI, I2C (TWI), I2S, and USB 2.0 Full-Speed connectivity, and DMA controllers that offload data movement from the CPU. The parallel data capture mode on the PIOs allows data collection from devices not compliant with standard memory read protocols, such as low-cost image sensors, with DMA transferring data to memory automatically. The device operates from a single 1.62V to 3.6V supply and is built on CMOS technology, balancing performance with power efficiency. According to Microchip, the SAM3S2A is pin-to-pin compatible with the SAM3N2A, giving designers a straightforward migration path between the SAM3N and SAM3S series when USB or additional analog peripherals are required. Typical applications include industrial control and automation nodes, consumer appliances with USB interfaces, battery-powered metering devices, and PC peripherals such as mice and keyboards where USB Full-Speed and low power are key requirements. The 64 MHz Cortex-M3 core provides ample headroom for control loops and communication stacks. When designing with this MCU, use the industrial temperature grade (-40C to +85C) margin carefully in sealed enclosures, and allocate the 128 KB flash budget with bootloader and firmware update overhead in mind. The Tape & Reel packaging (suffix AUR) supports automated pick-and-place assembly. This page synthesizes distributor inventory data, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3S2AA-MU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2AA-MU

ATSAM3S2AA-MU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2AA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 128 KB of embedded flash and 32 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded systems hierarchy: microcontroller -> embedded processor -> system-on-chip. The SAM3S series belongs to Atmel (now Microchip) ARM-based flash MCU family and sits above 8-bit AVR and PIC16 parts in performance while retaining low power operation. Key features include the ARM Cortex-M3 revision 2.0 core with Memory Protection Unit (MPU) and Thumb-2 instruction set, a 128-bit-wide flash accelerator for zero-wait-state execution at full speed, USB 2.0 Full-Speed device port, and a rich peripheral set including a 12-bit ADC, 2-channel 16-bit PWM, USARTs, and a parallel capture mode on the PIOs for low-cost image sensors. The device operates from a 1.62V to 3.6V supply (1.8V/3.3V nominal rails), making it compatible with both Li-ion battery and standard 3.3V industrial power domains. DMA is available on all major peripherals, offloading data movement from the CPU and reducing active current consumption. The part is pin-to-pin compatible with the AT91SAM7S legacy family and the SAM3N series, enabling straightforward platform upgrades. Typical applications include industrial sensors and HMI panels, consumer appliances, battery-powered portable instruments, and USB-connected data acquisition devices where 64 MHz performance and USB connectivity are required without the cost of larger MCUs. Design consideration: minimize power by using the Flash Living Region and Sleep/Wait/BackUp modes; use wait-state-free code placement carefully as performance depends on the flash accelerator behavior. This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S2AA-MUR - Cortex-M3 MCU 64MHz 128KB Flash | Microchip
ATSAM3S2AA-MUR

ATSAM3S2AA-MUR - Cortex-M3 MCU 64MHz 128KB Flash | Microchip

The Microchip Technology ATSAM3S2AA-MUR is a 32-bit ARM Cortex-M3 microcontroller from the SAM3S series, running at 64 MHz with 128KB (128K x 8) of embedded Flash memory, housed in a 48-pin VFQFN (7x7 mm) exposed-pad package and operating from a 1.62V to 3.6V supply. A microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog functions. Within the embedded systems hierarchy, the SAM3S sits in the medium-range general-purpose class of 32-bit MCUs, positioned above 8-bit devices like the PIC16 family and below high-performance Cortex-M4/M7 parts. The ARM Cortex-M3 architecture provides deterministic interrupt handling via the Nested Vectored Interrupt Controller (NVIC) and efficient Thumb-2 instruction execution. Key features include 64 MHz core performance, 128KB of on-chip Flash for program storage, low-power operation across the industrial temperature range, and a peripheral set that Microchip describes as offering the best ratio of reduced power consumption, processing power, and peripherals in its class. The PIOs support a parallel data capture mode that collects data from non-standard sources such as low-cost image sensors, with DMA transfers offloading the CPU. The device integrates a Cortex-M3 core with configurable Flash and SRAM organization, and Microchip notes Flash is architected in dual banks on SAM3S family members, supporting ECC and flash-banking techniques. The exposed-pad QFN package provides low inductance power delivery and good thermal performance for compact industrial designs. Typical applications include industrial control panels, consumer appliances, metering systems, and sensor-hub designs that benefit from the parallel capture interface and DMA-driven data flow. When designing, ensure the 1.62V to 3.6V supply range is respected and decouple the VDDCORE and VDDIO domains per the manufacturer datasheet; the M suffix denotes tape-and-reel packaging for automated assembly. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM3S2BA-AU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2BA-AU

ATSAM3S2BA-AU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2BA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz with 128 KB embedded Flash and 32 KB SRAM, housed in a 64-pin LQFP (10x10 mm) surface-mount package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy above discrete logic and below application processors and systems-on-chip. The SAM3S family belongs to Microchip's SMART ARM-based MCU portfolio, targeting cost-sensitive 32-bit industrial and consumer designs. Key features of the ATSAM3S2BA-AU include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set and Memory Protection Unit (MPU), a 128-bit-wide Flash memory interface with an accelerator for efficient 64 MHz execution, and pin-to-pin compatibility with the earlier AT91SAM7S series in 48- and 64-pin versions, which simplifies migration of legacy designs. Technical depth: the device integrates typical SAM3S peripherals such as USARTs, SPI, TWI (I2C), PWM channels, an ADC, USB 2.0 full-speed device port, and a flexible clock tree with fast RC oscillators and crystal inputs. The suffix 'AU' identifies the 64-pin LQFP, industrial temperature range, and lead-free tray packaging, making the part suited to standard reflow assembly. Typical applications include industrial control panels, battery-charged portable instruments, consumer appliances, motor-control front ends, and USB-connected sensor interfaces, where 128 KB of Flash and rich connectivity cover mid-complexity firmware without external memory. Design consideration: verify supply-voltage decoupling on VDDCORE and VDDIO domains and confirm Flash capacity against growth headroom, since larger SAM3S variants such as the ATSAM3S4BA share the same footprint for upward migration. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S2BA-AUR - Cortex-M3 MCU 64MHz 128KB Flash | Microchip
ATSAM3S2BA-AUR

ATSAM3S2BA-AUR - Cortex-M3 MCU 64MHz 128KB Flash | Microchip

The Microchip Technology ATSAM3S2BA-AUR is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 128 KB of flash memory, 32 KB of SRAM, and a wide 1.62V to 3.6V operating supply, housed in a 64-pin LQFP (10x10 mm) surface-mount package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, non-volatile program memory, volatile data memory, and a rich set of peripherals on one die. Within the semiconductor hierarchy, the ATSAM3S2BA-AUR belongs to the Microchip (formerly Atmel) SAM3S family of ARM Cortex-M3 microcontrollers, which sit above simpler 8-bit MCUs in processing capability while retaining low-power operation for embedded control systems. Key features include the 64 MHz Cortex-M3 core with a 3-stage pipeline and Thumb-2 instruction set, 128 KB of on-chip flash for code storage, fast SRAM, and an extended industrial temperature rating. The peripheral set typical of the SAM3S series includes UART/USART serial ports, SPI, TWI (I2C), an ADC, PWM channels, and USB connectivity, enabling single-chip designs for communication-heavy applications. The device operates from a single 1.62V to 3.6V rail, supporting battery-powered designs. Architecturally, the ARM Cortex-M3 core integrates a Nested Vectored Interrupt Controller (NVIC) for deterministic low-latency interrupt handling and hardware divide support. Flash-based program memory with in-system programming allows firmware field updates, while the 10x10 mm LQFP-64 package provides sufficient I/O count for display, sensor, and actuator interfaces. Typical applications include industrial control and automation nodes, consumer appliances, battery-powered portable instruments, and USB-enabled embedded devices where a 32-bit core with ample flash is required without the cost of higher-memory parts. A key design consideration is supply decoupling: place low-ESR ceramic capacitors close to each VDD/VDDIO pin pair, and confirm 1.8V/3.3V domain separation per the SAM3S datasheet electrical characteristics before PCB routing. This page synthesizes distributor pricing, drop-in same-family alternatives, cross-reference candidates, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM3S2BA-MUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2BA-MUR

ATSAM3S2BA-MUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2BA-MUR is a 32-bit ARM Cortex-M3 microcontroller from the SAM3S family, running at up to 64 MHz with 128 KB of embedded Flash and 32 KB of SRAM, housed in a 64-pin QFN (9x9 mm) package with exposed pad. A microcontroller (MCU) is a single-chip integrated circuit that combines a processor core, program memory, data memory, and a rich set of peripherals into one package. Within the embedded-systems hierarchy, the SAM3S sits in the mid-range 32-bit MCU class, positioned above 8-bit PIC and AVR devices and below high-performance Cortex-M4/M7 families, targeting cost-sensitive applications that still require 32-bit compute throughput and USB connectivity. Key features include the 64 MHz Cortex-M3 core with a 3-stage pipeline and Thumb-2 instruction set, 128 KB of self-programmable Flash with a dedicated flash controller, and an integrated USB 2.0 Full-Speed Device port. The device also integrates a 12-bit ADC with 16 channels, a 2-channel 12-bit DAC, a capacitive-touch support peripheral, PWM channels, USART/SPI/TWI serial interfaces, and an internal 1.8V/3.3V operating regime supplied from 1.62V to 3.6V. Technically, the SAM3S implements Microchip (Atmel) SMART ARM-based architecture with a multi-layer bus matrix, DMA-capable peripheral event system, and power management controller offering sleep, wait, and backup modes with low quiescent consumption for battery-powered designs. The exposed-pad QFN package improves thermal dissipation and ground return paths for mixed-signal performance. Typical applications include industrial control panels, consumer appliances, USB-connected sensors and dataloggers, and battery-powered metering products where the combination of Cortex-M3 performance, USB device connectivity, and integrated analog reduces total bill-of-materials cost. For design, plan the VDDCORE/VDDIO decoupling network per the manufacturer datasheet and use the exposed pad as the main ground connection; flash wait-state configuration relative to the 64 MHz clock also affects efficiency. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM3S2CA-AU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2CA-AU

ATSAM3S2CA-AU - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2CA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 128 KB of embedded Flash memory and 32 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) package. Formerly an Atmel AT91 SAM3S series device, it integrates an MPU, a Thumb-2 instruction set pipeline, and a rich peripheral set for embedded control. A 32-bit microcontroller (MCU) is an integrated circuit that executes application code and controls peripherals on a single chip; the Cortex-M3 core sits within the ARM MCU hierarchy beneath higher-performance Cortex-M4/M7 parts and above 8-bit architectures. The SAM3S family targets cost-sensitive, low-power embedded systems that still need 32-bit processing headroom. Key features include the ARM Cortex-M3 revision 2.0 core at 64 MHz with Memory Protection Unit (MPU), 128 KB single-cycle Flash and 32 KB SRAM, 47 general-purpose I/O lines on this 100-pin variant, and Flash-based program storage with in-system programming. The MRL/industrial temperature grade supports -40C to +85C operation per distributor data. The architecture combines the three-stage Harvard Cortex-M3 pipeline with an on-chip bus matrix, allowing Flash execution while peripherals such as UARTs, timers, and USB operate concurrently. Nested Vectored Interrupt Controller (NVIC) latency is deterministic, which suits real-time embedded automation and metering firmware. Core supply operates in the 1.08 V to 1.32 V domain with an integrated regulator from a 1.8 V/3.3 V IO supply. Typical applications include industrial control, IoT sensor nodes, motor control, metering, and low-power board designs, where the SAM3S balances cost, power, and processing throughput. Pin-to-pin compatibility with AT91SAM7S legacy parts (48- and 64-pin versions per datasheet notes) eases migration. When designing with this device, budget Flash carefully: 128 KB is adequate for most control firmware but tight for stacks with USB host plus file systems; consider ATSAM3S4CA (256 KB) if code size may grow. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3S2CA-AUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
ATSAM3S2CA-AUR

ATSAM3S2CA-AUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip

The Microchip Technology ATSAM3S2CA-AUR is a 32-bit ARM Cortex-M3 microcontroller of the SAM3S series, running at up to 64 MHz with 128 KB of flash memory and a 100-pin LQFP (14x14 mm) surface-mount package. It operates from a 1.62V to 3.6V supply (1.8V/3.3V typical rails). A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (flash), data memory (SRAM), and a rich set of peripherals such as timers, serial interfaces (USART, SPI, I2C/TWI), ADC channels, and general-purpose I/O. Within the semiconductor hierarchy, the ATSAM3S2CA-AUR belongs to the SAM3S family, the ARM Cortex-M3 core class, the 32-bit microcontroller category, and the broader embedded processor / power management system domain of a board design. Key differentiating features include the Thumb-2 instruction set of the Cortex-M3 core, which delivers high code density; 128 KB (128K x 8) of on-chip flash for program storage; fast SRAM for data; and a comprehensive peripheral set that allows a single MCU to handle sensing, control, and communication tasks simultaneously. Industrial temperature qualification and a green, RoHS-compliant LQFP package make the part suitable for long-lifecycle embedded products. Architecturally, the Cortex-M3 core uses a Harvard bus structure with separate instruction and data paths, a nested vectored interrupt controller (NVIC) for deterministic interrupt latency, and hardware multiply/divide support. The SAM3S series pairs this core with Microchip (formerly Atmel) peripheral infrastructure, including DMA-capable serial controllers that offload the CPU during data transfers. Typical applications include industrial control and automation nodes, consumer and medical devices, test instruments, and smart sensing modules. The 100-pin LQFP offers abundant GPIO for keypad, display, and peripheral interfacing, which is why this variant is popular for human-machine interface boards. When designing with this MCU, verify the flash density matches your firmware footprint before committing a footprint - larger SAM3S family members (ATSAM3S4CA, ATSAM3S8CA) are pin-compatible upgrades that require no PCB changes. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes beyond what the manufacturer datasheet provides, giving engineers a single citable reference for the ATSAM3S2CA-AUR.

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