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ATSAM3N4BA-AU - 48MHz Cortex-M3, 256KB Flash MCU | Microchip
ATSAM3N4BA-AU

ATSAM3N4BA-AU - 48MHz Cortex-M3, 256KB Flash MCU | Microchip

The Microchip ATSAM3N4BA-AU (originally Atmel) is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 256 KB of Flash program memory, 24 KB of SRAM, and 47 general-purpose I/O lines, housed in a 64-pin LQFP (10 x 10 mm) package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, non-volatile program memory, RAM, and peripheral functions such as timers, serial interfaces, and analog-to-digital converters. Within the embedded-systems hierarchy, the ATSAM3N4BA sits in the general-purpose 32-bit MCU class, one step above 8-bit controllers like the PIC16 family and one step below high-performance application processors, making it well suited for cost-sensitive control tasks that still require 32-bit arithmetic and C-friendly execution. Key features include the ARM Cortex-M3 revision 2.0 core executing Thumb-2 instructions, a 24-bit SysTick timer, a nested vector interrupt controller (NVIC), and an internal oscillator that removes the need for an external crystal in many designs. The device operates from a single 1.62 V to 3.6 V supply (nominally 1.8 V or 3.3 V) and is characterized for industrial temperature ranges. The B-suffix SAM3N variant adds peripheral connectivity such as HSMCI for SD/MMC media storage alongside USART, SPI, TWI, and PWM channels. Architecturally, the SAM3N series uses the Cortex-M3 three-stage pipeline with Harvard bus structure, delivering deterministic interrupt latency and efficient code density through Thumb-2. Per the SAM3N datasheet summary, the SAM3N4/2/1/0/00 series is pin-to-pin compatible with SAM3S products, which simplifies migration between memory and peripheral density points. Typical applications include industrial sensors and control nodes, consumer appliances, metering front ends, and battery-powered portable equipment where 48 MHz performance, 256 KB flash, and low power matter more than USB or Ethernet connectivity. When designing with this device, verify that your codebase fits within 256 KB flash and 24 KB SRAM, and consider the SAM3S series if USB device capability is needed, since footprints are shared. This page synthesizes distributor availability data, drop-in alternatives within the SAM3N/SAM3S pin-compatible family, and practical design guidance not found in the manufacturer datasheet.

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ATSAM3N4BA-MU - 48MHz Cortex-M3 MCU, 256KB Flash | Microchip
ATSAM3N4BA-MU

ATSAM3N4BA-MU - 48MHz Cortex-M3 MCU, 256KB Flash | Microchip

The Microchip Technology ATSAM3N4BA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 256KB embedded Flash, 24KB SRAM, and 47 general-purpose I/O lines, housed in a 64-pin QFN (9x9 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 tier of the embedded processing hierarchy that spans MCUs, microprocessors (MPUs), and systems-on-chip (SoCs). Within that hierarchy, the SAM3N series belongs to Microchip (formerly Atmel) ARM-based Flash MCU portfolio, positioned as the cost-reduced migration path from the SAM3S series for high-volume, cost-sensitive applications. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick timer, and a Nested Vector Interrupt Controller (NVIC). The embedded Flash uses a 128-bit wide access bus with a memory accelerator, sustaining near-zero-wait-state execution at the full 48 MHz clock rate. An internal oscillator eliminates the need for an external crystal in clock-tolerant designs, reducing bill-of-materials cost. Supply operation spans 1.8V to 3.3V, and the device is qualified for industrial temperatures from -40C to +85C. Architecturally, the SAM3N is pin-to-pin compatible with the SAM3S series (48-, 64-, and 100-pin versions) and with legacy SAM7S products (48- and 64-pin versions), which means designers can migrate between the two families - trading peripheral count for lower BOM cost - without PCB rework. The MU suffix denotes the lead-free, RoHS-compliant QFN package in tray packaging. Typical applications include industrial automation nodes, consumer electronics, and medical device peripherals - domains the manufacturer explicitly targets with this part. Its 47 I/O lines and peripheral set (USART, SPI, TWI, ADC) suit sensor aggregation, motor control interfaces, and human-machine interface boards. A key design consideration: since the device runs from a single 1.8V to 3.3V rail, decouple each supply pin with 100 nF ceramics placed close to the exposed pad, and connect the QFN backside pad to a ground pour for thermal and signal-integrity performance. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N4CA-AU - 48MHz Cortex-M3 256KB MCU | Microchip
ATSAM3N4CA-AU

ATSAM3N4CA-AU - 48MHz Cortex-M3 256KB MCU | Microchip

The Microchip Technology ATSAM3N4CA-AU is a 32-bit ARM Cortex-M3 microcontroller operating up to 48 MHz, with 256 KB of Flash memory, 24 KB of SRAM, and 79 I/O pins in a 100-LQFP 14 x 14 mm package. It combines an embedded microcontroller core with analog, timer, communications, and industrial-control peripherals for embedded systems. A microcontroller is a compact computer system built around a CPU core, nonvolatile program memory, volatile working memory, and integrated peripherals. The ARM Cortex-M3 core provides the instruction execution and interrupt-control foundation, while Flash stores firmware and SRAM supports runtime data. In the product hierarchy, ATSAM3N4CA-AU is a microcontroller, an embedded processor, and a semiconductor used for control-oriented electronic systems. The verified feature data identifies an ARM Cortex-M3 revision 2.0 core running to 48 MHz, Thumb-2 instructions, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller. The device also includes timer and counter resources, a 10-bit ADC described in the source material as up to 16 channels at 384 kSPS, and a second 10-bit ADC described as 1 channel at 500 kSPS. These resources support mixed control, measurement, timing, and signal-processing workloads. The SAM3N series is described in the source material as pin-to-pin compatible with the SAM3S series, but a replacement still requires verification of memory size, peripheral availability, electrical limits, and software support. The ATSAM3N4CA-AU combines a relatively large 100-pin package with 79 I/O, making it appropriate for designs needing more external connections than a small-package MCU provides. Typical uses include industrial control, data acquisition, communications equipment, timer-based control, and embedded control boards. The 48 MHz Cortex-M3 performance and 256 KB Flash capacity are useful for firmware that requires more memory and processing capability than a basic 8-bit controller, while the integrated ADC channels reduce the need for external analog converters. When designing around this MCU, verify clock, power, analog-reference, and peripheral connections against the manufacturer datasheet before layout. Place decoupling capacitors close to the supply pins, route sensitive analog signals away from switching nodes, and confirm the exact 100-pin pinout. This product record distinguishes verified core, memory, package, and ADC facts from parameters that still require application-specific confirmation. This page consolidates the available manufacturer and distributor references, evaluates possible drop-in alternatives, and highlights practical embedded-design checks beyond a basic distributor specification table.

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ATSAM3N4CA-CU - 48MHz ARM Cortex-M3 MCU, 256KB Flash | Atmel
ATSAM3N4CA-CU

ATSAM3N4CA-CU - 48MHz ARM Cortex-M3 MCU, 256KB Flash | Atmel

The Atmel (Microchip Technology) ATSAM3N4CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller from the SAM3N series, running at up to 48 MHz with 256 KB of Flash memory and 24 KB of SRAM in a 100-ball 100-TFBGA (9x9 mm) package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals on one die, forming the heart of embedded systems. The SAM3N belongs to the ARM Cortex-M3 family of 32-bit MCUs, which sits within the broader hierarchy of ARM-based RISC processors used across industrial, consumer, and connectivity electronics. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick timer, and a Nested Vector Interrupt Controller (NVIC). The device is pin-to-pin compatible with legacy SAM7S products (48- and 64-pin versions) and SAM3S devices (48-, 64- and 100-pin versions), enabling cost-down migrations and footprint reuse across existing Atmel board designs. An internal oscillator removes the need for an external crystal in many designs, and the wide 1.62 V to 3.6 V supply range supports both 1.8 V and 3.3 V systems. The Cortex-M3 core uses a Harvard architecture with a three-stage pipeline, delivering deterministic interrupt latency suitable for real-time control. Flash execution at 48 MHz combined with the efficient Thumb-2 instruction density keeps code compact in the 256 KB program memory, while 24 KB of SRAM supports moderate buffers, stacks, and communication FIFOs. Typical applications include industrial control panels, consumer appliance interfaces, and low-cost embedded systems migrating from the older SAM7S family. The 79 I/O lines provide flexibility for keypads, displays, and parallel peripheral interfaces. Design consideration: select the CU package suffix consistently with your PCB footprint, since the SAM3N family spans multiple 100-pin packages; verify the exact ball map in the manufacturer datasheet before layout release. This page synthesizes distributor listings, datasheet highlights, drop-in alternatives, and design notes not found on the manufacturer product page. Pricing and stock data as of 2026-09-19.

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ATSAM3S1AA-AU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3S1AA-AU

ATSAM3S1AA-AU - 64MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip (Atmel) ATSAM3S1AA-AU 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, housed in a 48-pin LQFP (7x7 mm) surface-mount package with 47 general-purpose I/O lines. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, non-volatile program memory, RAM, and peripherals such as timers, serial interfaces, and analog converters onto one die. Within the embedded hierarchy, the ATSAM3S1AA-AU sits in the general-purpose 32-bit MCU class, part of the SAM3S family of ARM-based flash MCUs that succeeded Atmel's AT91 legacy line and is now sold under Microchip Technology. Key differentiating specifications include the 64 MHz Cortex-M3 core with Thumb-2 instruction efficiency, 1.62V to 3.6V single-supply operation with an internal 1.2V regulator (core supply 1.08V to 1.32V), and a rich peripheral set typical of the SAM3S family, including USB device support, multiple USART/SPI/TWI serial channels, an ADC, PWM channels, and a real-time clock calendar for low-power designs. The device is pin-to-pin compatible with the SAM3N series, giving designers a migration path between cost- and feature-optimized variants. Architecturally, the device combines the three-stage ARM Cortex-M3 pipeline with Atmel's flash memory technology and a multi-layer bus matrix, allowing peripheral DMA access without loading the CPU. Power management controllers (PMC) permit per-peripheral clock gating, supporting the low active and sleep current levels the SAM3S family is known for. Typical applications include industrial control nodes, consumer and portable battery-powered devices, printer and POS peripherals, and sensor-hub products that need USB connectivity in a compact 48-pin footprint. When designing with this device, budget flash utilization carefully: 64 KB is adequate for bare-metal and FreeRTOS-class firmware, but code size growth may favor the pin-compatible ATSAM3S1BA-AU (128 KB) upgrade. This page synthesizes verified distributor data, drop-in same-package alternatives, and practical design notes not found on the manufacturer's own product pages.

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ATSAM3S1AA-MU - Cortex-M3 64MHz MCU 64KB Flash | Microchip
ATSAM3S1AA-MU

ATSAM3S1AA-MU - Cortex-M3 64MHz MCU 64KB Flash | Microchip

The Microchip (Atmel) ATSAM3S1AA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 64 MHz, with 64 KB of embedded Flash and 16 KB of SRAM, housed in a 48-pin QFN (7x7 mm) surface-mount package with 47 general-purpose I/O lines. A microcontroller (MCU) is a single-chip computer integrating a processor core, non-volatile program memory, SRAM data memory, and peripherals such as UARTs, timers, and USB. The ATSAM3S1AA-MU belongs to the 32-bit microcontroller class, sitting within the ARM Cortex-M family hierarchy under the SAM3S product series, and is designed as an upgrade path from Atmel's legacy AT91SAM7S family. Key features include the ARM Cortex-M3 revision 2.0 core with a Thumb-2 instruction set and Memory Protection Unit (MPU), a Full Speed USB Device port with embedded transceiver, a High Speed Multimedia Card Interface (HSMCI) supporting SDIO/SD/MMC, and a 128-bit wide Flash access with memory accelerator for deterministic 64 MHz execution. The device operates from a single supply of 1.62V to 3.6V with an internal 1.08V to 1.32V core regulator, and the SAM3S series is pin-to-pin compatible with AT91SAM7S legacy products in 48- and 64-pin versions, enabling low-risk migration of existing designs. Architecturally, the Flash is accessed through a 128-bit wide bus feeding an accelerator, allowing zero-wait-state execution from fast SRAM paths even at the 64 MHz maximum core frequency. The peripheral set also includes an External Bus Interface (EBI) for memory expansion, and the industrial temperature grade supports rugged deployments. Typical applications include industrial control panels, consumer devices with USB connectivity, data loggers using SD/MMC storage, and cost-sensitive embedded systems migrating from AT91SAM7S silicon. Design consideration: budget the 64 KB Flash carefully; if firmware grows, ATSAM3S2AA-MU (128 KB) and ATSAM3S4AA-MU (256 KB) are drop-in same-package upgrades in the same QFN-48 footprint. This page synthesizes verified datasheet data, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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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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