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ATSAM3N00AA-AU - 48MHz Cortex-M3 MCU 16KB Flash LQFP-48 | Microchip
ATSAM3N00AA-AU

ATSAM3N00AA-AU - 48MHz Cortex-M3 MCU 16KB Flash LQFP-48 | Microchip

The Microchip Technology ATSAM3N00AA-AU (formerly Atmel) is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 16 KB of Flash program memory, 4 KB of SRAM, and a 48-pin LQFP (7x7 mm) surface-mount package operating over the industrial temperature range. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest tier of the embedded computing hierarchy (MCU -> embedded processor -> SoC -> application processor). The SAM3N series belongs to Microchip's ARM-based SAM flash MCU family, built on the high-performance 32-bit ARM Cortex-M3 RISC processor with Thumb-2 instruction set and an integrated Nested Vector Interrupt Controller (NVIC). Key features of the ATSAM3N00AA-AU include the ARM Cortex-M3 revision 2.0 core at 48 MHz, a 24-bit SysTick timer for RTOS tick generation, a single-cycle hardware multiply, and pin-to-pin compatible scaling across the SAM3N memory family. Supply operation spans 1.8V, 2.5V, and 3.3V rails, giving designers flexibility across battery and industrial power architectures. Technically, the device leverages the Cortex-M3 three-stage pipeline and Harvard architecture, separating instruction and data buses for efficient flash execution. The 16 KB flash supports in-system programming, while the 4 KB SRAM handles stack and data buffers. Because the SAM3N family shares a common peripheral set and footprint, firmware written for the ATSAM3N00AA migrates to larger 256 KB flash variants with minimal code changes. Typical applications include industrial sensing nodes, consumer appliance control panels, low-cost data loggers, and general-purpose embedded control where a 32-bit core is required but USB connectivity of higher SAM3N members is not used. A key design consideration is power budgeting: select the 1.8V rail for lowest active power, and verify that the 4 KB SRAM is sufficient for your RTOS stack, since this is the smallest memory point in the SAM3N family. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N00AA-AUR - 48MHz Cortex-M3 16KB Flash MCU | Microchip
ATSAM3N00AA-AUR

ATSAM3N00AA-AUR - 48MHz Cortex-M3 16KB Flash MCU | Microchip

The Microchip Technology ATSAM3N00AA-AUR is a 32-bit ARM Cortex-M3 microcontroller running at up to 48 MHz with 16 KB of single-cycle Flash memory and 4 KB of SRAM, housed in a 48-pin LQFP (7 x 7 mm) package rated for industrial temperatures of -40C to +85C. A microcontroller (MCU) is a compact integrated circuit that combines a processor core, program memory, data memory, and peripherals on a single die, serving as the control brain of embedded systems. The SAM3N family sits within the broader hierarchy of ARM-based 32-bit microcontrollers, part of Microchip's SAM product line of flash MCUs that succeeded the Atmel SAM3 series. Key features of the ATSAM3N00AA-AUR include the ARM Cortex-M3 RISC core with a 3-stage pipeline and nested vectored interrupt controller (NVIC), supply operation from 1.62 V to 3.6 V, and a rich peripheral set that includes USART, UART, TWI (I2C) and SPI serial interfaces, an 8-channel 10-bit ADC, PWM timers, and a real-time clock. Its low-power architecture provides sleep, wait, and backup operating modes for battery-sensitive designs. Technically, the device integrates a power management controller that allows per-peripheral clock gating, reducing dynamic current consumption. The Flash memory supports in-system programming via JTAG or the serial UART/TWI boot loader, and an 8-level priority interrupt structure simplifies deterministic real-time firmware design. Typical applications include industrial control nodes, consumer appliance interfaces, metering front-ends, and low-cost sensing systems where 16 KB of Flash and a 48-pin footprint provide the right balance of capability and cost. When designing with this MCU, budget code size carefully: after the SAM3N ROM library footprint, roughly 14 KB of usable Flash remains, so consider pin-compatible SAM3N family members with larger memory if code growth is expected. This page synthesizes distributor pricing, drop-in family alternatives, comparison data, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-19.

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ATSAM3N00AA-MU - 48MHz Cortex-M3 MCU 16KB Flash | Microchip
ATSAM3N00AA-MU

ATSAM3N00AA-MU - 48MHz Cortex-M3 MCU 16KB Flash | Microchip

The Microchip Technology ATSAM3N00AA-MU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 48 MHz with 16 KB of flash memory and 4 KB of SRAM, housed in a 48-pin QFN (7x7 mm) surface-mount package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the heart of embedded systems. The ATSAM3N00AA belongs to the entry-level tier of the SAM3N family, which sits within the broader ARM Cortex-M 32-bit microcontroller hierarchy, above 8-bit MCUs in throughput while remaining cost-optimized for high-volume designs. Key features include the high-performance ARM Cortex-M3 RISC processor with Harvard architecture and 3-stage pipeline, 16 KB (16K x 8) of single-cycle flash program memory, and 4 KB of SRAM. The device integrates a rich peripheral set for its class, including USART and UART serial ports, SPI, TWI (I2C), multiple timers, and an ADC, enabling compact single-chip designs for serial bridging, sensing, and control tasks. The SAM3N series is documented by Atmel (now Microchip) as pin-to-pin compatible with the SAM3S series, and family members scale in memory while sharing the same footprint. This allows a single PCB design to be populated with different SAM3N/SAM3S flash densities as memory requirements evolve - a significant advantage in cost-sensitive, high-volume applications where firmware growth must not force a board respin. Typical applications include industrial sensor nodes, consumer appliance control, motor-adjacent auxiliary control, low-cost data loggers, and general-purpose embedded control where a 48 MHz 32-bit core outclasses 8-bit alternatives at a similar price point. The industrial temperature grade supports harsh environments from -40C to +85C. Design consideration: with only 16 KB flash and 4 KB SRAM, budget code size carefully; use compiler size optimization and consider ATSAM3N1AA-MU or higher as a pin-compatible upgrade path. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a decision-ready view of the SAM3N00A ecosystem.

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ATSAM3N00AA-MUR - 48MHz Cortex-M3 MCU 16KB Flash | Microchip
ATSAM3N00AA-MUR

ATSAM3N00AA-MUR - 48MHz Cortex-M3 MCU 16KB Flash | Microchip

The Microchip Technology ATSAM3N00AA-MUR is a 32-bit ARM Cortex-M3 flash microcontroller operating at 48 MHz with 16KB of flash program memory and 4KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It operates from 1.62V to 3.6V across the industrial temperature range of -40C to +85C. A microcontroller (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 from MCUs to application processors. Microcontrollers execute dedicated control tasks in real time, making them the workhorses of embedded electronics. The SAM3N family belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, positioning itself as a cost-optimized 32-bit upgrade path from 8-bit AVR and PIC architectures. Key features of the ATSAM3N00AA include the high-performance 32-bit ARM Cortex-M3 RISC core with nested vectored interrupt controller (NVIC), a 12-channel 10-bit ADC, USART, UART, SPI and Two-Wire Interface (TWI) serial peripherals, PWM timers, and brown-out reset with watchdog supervision. The flash memory supports in-system programming, and the device supports the Serial Wire Debug (SWD) and JTAG interfaces for development. The Cortex-M3 architecture delivers Thumb-2 code density, single-cycle multiply hardware, and deterministic interrupt latency, allowing efficient C-level programming through ARM-standard toolchains such as Keil MDK, IAR Embedded Workbench, and Microchip's free MPLAB X / Atmel Studio ecosystem with the SAM D/N Xplained family of evaluation kits. Typical applications include industrial sensor nodes, consumer appliance control, stepper and DC motor control, battery-powered meters, and general-purpose 32-bit control systems where a low pin count, low power, and low BOM cost matter more than large flash capacity. When designing with this MCU, budget the modest 16KB flash carefully: use compiler size optimization (-Os) and consider the pin-compatible, higher-flash SAM3N variants for code growth headroom. This page synthesizes distributor pricing, same-package upgrade alternatives, pinout, and practical design guidance not found in the manufacturer datasheet.

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ATSAM3N00BA-AU - ARM Cortex-M3 MCU 48MHz 16KB | Microchip
ATSAM3N00BA-AU

ATSAM3N00BA-AU - ARM Cortex-M3 MCU 48MHz 16KB | Microchip

The Microchip Technology (Atmel) ATSAM3N00BA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at 48 MHz with 16KB (16K x 8) of embedded flash memory, housed in a 64-pin LQFP (10x10 mm) surface-mount package with gull-wing terminals. It belongs to the SAM3N series of entry-level ARM-based flash microcontrollers designed for cost-sensitive embedded control. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the computational heart of embedded systems. Within the hierarchy of semiconductor devices, the SAM3N family sits in the 32-bit ARM microcontroller segment, positioned above 8-bit MCUs in processing capability while remaining economical. The ARM Cortex-M3 revision 2.0 core executes the Thumb-2 instruction set, delivering code density that reduces flash requirements for a given function. Key features of the ATSAM3N00BA-AU include the 48 MHz Cortex-M3 processor, a 24-bit SysTick counter for deterministic RTOS timing, and a Nested Vector Interrupt Controller (NVIC) for low-latency interrupt handling. The 16KB flash provides program storage for compact applications, and the industrial temperature rating (-40C to +85C per Mouser listing) supports harsh environments. Mouser lists the package as LQFP, Green, IND TEMP, MRL A, indicating RoHS-aligned green packaging and moisture reflow level A. According to the manufacturer datasheet, the SAM3N series provides pin-to-pin compatibility across memory-density variants, so the 16KB ATSAM3N00BA-AU can be swapped for larger-memory siblings on the same PCB when firmware outgrows available space. Architecture strengths include robust EMI tolerance and the ARM ecosystem of development tools, including the Atmel/Microchip Studio IDE and SAM-BA in-system programming. Typical applications include industrial automation nodes, consumer appliance control, motor control interfaces, and sensor-gathering IoT endpoints where 16KB of code space and 48 MHz performance are sufficient. A key design consideration: flash density is the primary constraint - verify the compiled firmware image fits within 16KB before committing to the 00B variant, since other SAM3N family members on the identical footprint offer up to 256KB. This page synthesizes distributor listings from DigiKey, Mouser, Octopart, and cross-reference research into a single resource, adding drop-in family alternatives, comparison tables, and design guidance not consolidated on the manufacturer datasheet.

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ATSAM3N00BA-MU - ARM Cortex-M3 48MHz 16KB MCU | Microchip
ATSAM3N00BA-MU

ATSAM3N00BA-MU - ARM Cortex-M3 48MHz 16KB MCU | Microchip

The Microchip Technology ATSAM3N00BA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 16 KB of embedded Flash and 4 KB of SRAM, housed in a 64-pin QFN (9x9 mm) surface-mount package with industrial temperature capability. 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 semiconductor hierarchy, the ATSAM3N00BA belongs to the microcontroller class, specifically the 32-bit ARM-based Flash MCU family, which sits above 8-bit MCUs in processing throughput while remaining below application processors in complexity. The SAM3N series targets cost-sensitive, low-power embedded control designs. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller (NVIC) for deterministic interrupt handling. Per the Atmel/Microchip datasheet, the device is pin-to-pin compatible with SAM7S legacy products (48- and 64-pin versions) and SAM3S (48-, 64-, and 100-pin versions), which significantly eases migration between family members and legacy designs. The 128-bit wide Flash access with memory accelerator sustains near-zero-wait-state execution at 48 MHz. The SAM3N architecture separates the core bus from the peripheral bus, so peripheral accesses do not stall core execution. The 16 KB Flash supports in-system programming, and the 4 KB SRAM handles application data and stacks for compact embedded firmware. Supply voltage ranges from 1.62 V to 3.6 V per distributor-verified specifications, supporting both Li-ion-tolerant and 3.3 V industrial rails. Industrial temperature grade operation supports harsh environments. Typical applications include industrial automation nodes, consumer appliance control, metering front-ends, and legacy SAM7S redesigns where pin compatibility reduces PCB changes. The 64-QFN footprint with exposed pad also suits compact sensing and actuation boards. A key design consideration is Flash density: at 16 KB, the ATSAM3N00BA suits RTOS-free or bare-metal firmware; if code grows, the pin-compatible ATSAM3N001BA/002BA/004BA offer 32/64/128 KB in the identical 64-QFN footprint. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3N00BA-MUR - ARM Cortex-M3 48MHz MCU 16KB Flash | Microchip
ATSAM3N00BA-MUR

ATSAM3N00BA-MUR - ARM Cortex-M3 48MHz MCU 16KB Flash | Microchip

The Microchip Technology ATSAM3N00BA-MUR is a 32-bit ARM Cortex-M3 microcontroller (MCU) operating at up to 48 MHz, with 16 KB of Flash program memory and 4 KB of SRAM, housed in a 64-pin VQFN (9x9 mm) package with exposed pad. An ARM Cortex-M3 based MCU is a 32-bit reduced-instruction-set (RISC) processor core implementing the ARMv7-M architecture, which combines efficient thumb-2 instruction execution with a nested vectored interrupt controller (NVIC) for deterministic, low-latency interrupt handling. Within the embedded system hierarchy, the MCU sits at the control layer above discrete logic and below application processors, integrating CPU, Flash, SRAM, peripherals, and clocking into a single chip for cost-sensitive embedded control. Key differentiating specifications of the ATSAM3N00BA-MUR include its 48 MHz maximum core frequency, 16 KB (16K x 8) Flash memory, 4 KB SRAM, and the compact 64-QFN (9x9 mm) surface-mount package with exposed thermal pad. The -MUR suffix denotes tape-and-reel packaging for automated high-volume assembly, and the device is specified for industrial temperature-grade operation. Architecturally, the SAM3N series is Microchip's entry-level, general-purpose Cortex-M3 family, focusing on low power consumption and a rich peripheral set rather than the higher integration of the SAM4 series. The Cortex-M3 core executes the Thumb-2 instruction set, delivering high code density that is particularly valuable in Flash-constrained designs like this 16 KB part. Typical applications include industrial control nodes, consumer appliances, metering front-ends, and portable battery-powered devices where a small footprint, low power, and adequate 48 MHz processing headroom are required without the cost of larger Flash densities. When designing with this MCU, budget Flash carefully: 16 KB must hold the application plus an optional small bootloader, so use size-optimized (-Os) compilation and consider the pin-compatible larger-memory SAM3N family members for future headroom. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3N0AA-AU - 48MHz Cortex-M3 MCU 32KB Flash | Microchip
ATSAM3N0AA-AU

ATSAM3N0AA-AU - 48MHz Cortex-M3 MCU 32KB Flash | Microchip

The Microchip Technology ATSAM3N0AA-AU (originally Atmel) is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz, with 32 KB of single-cycle Flash memory, housed in a 48-pin LQFP (7x7 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 lowest tier of the embedded processing hierarchy: Cortex-M3 core -> ARM-based Flash MCU -> microcontroller -> semiconductor. The SAM3N series belongs to Microchip's SAM3 family of ARM-based Flash microcontrollers and targets cost-sensitive, high-volume embedded 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 device operates from 1.62V to 3.6V (1.8V/2.5V/3.3V supply classes) and is rated for industrial temperature operation. The -AU suffix denotes a 48-pin LQFP in a green, RoHS-compliant package supplied in trays. Architecturally, the Cortex-M3 Harvard core delivers deterministic single-cycle Flash execution with efficient Thumb-2 code density, while the NVIC provides low-latency, prioritized interrupt handling essential for real-time control. The SAM3N series is pin-to-pin compatible with the SAM3S series and with legacy SAM7S devices (48- and 64-pin versions), enabling seamless migration paths for flash density and peripheral upgrades without PCB rework. Typical applications include industrial control and automation nodes, consumer appliance interfaces, metering front-ends, and cost-optimized IoT sensor endpoints where 32-bit performance is needed at 8/16-bit MCU price points. Design consideration: the ATSAM3N0AA-AU has no USB peripheral (that belongs to other SAM3 variants), so designs requiring high-speed USB should select an appropriate sibling part; also budget Flash and SRAM margins carefully since 32 KB Flash is the entry point of the family. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N0AA-AUR - 48MHz Cortex-M3 MCU 32KB Flash LQFP-48 | Microchip
ATSAM3N0AA-AUR

ATSAM3N0AA-AUR - 48MHz Cortex-M3 MCU 32KB Flash LQFP-48 | Microchip

The Microchip Technology ATSAM3N0AA-AUR is a 32-bit ARM Cortex-M3 microcontroller running at up to 48 MHz, with 32KB of single-cycle Flash memory and 8KB of SRAM, housed in a 48-pin LQFP (7x7 mm) package rated for the industrial temperature range. A microcontroller (MCU) is a complete computing system on a single chip, integrating a processor core, program memory, data memory, and peripherals such as UART, SPI, timers, and GPIO. Within the power-management hierarchy of embedded systems, the SAM3N family sits in Microchip's entry-level 32-bit ARM MCU portfolio, below the SAM3S/SAM4S families, and serves as the control element that reads sensors, drives actuators, and manages communication in a larger system design. Key features of the ATSAM3N0AA-AUR include the ARM Cortex-M3 RISC core with a 3-stage pipeline and NVIC interrupt controller, 1.62V to 3.6V single-supply operation, and multiple low-power modes including wait, sleep, and backup modes for battery-conscious designs. The SAM3N series is pin-, peripheral-, and code-compatible across flash densities, allowing engineers to scale memory without redesigning the PCB. Technically, the Cortex-M3 core executes Thumb-2 instructions with hardware divide and a nested vectored interrupt controller, delivering deterministic interrupt latency. The flash memory supports single-cycle access at 48 MHz, and the device integrates a power management controller, a watchdog timer, and standard serial peripherals for connecting external devices. Typical applications include industrial control panels, consumer appliances, metering front ends, and battery-powered sensor nodes where 32-bit performance is required at 8-bit MCU cost points. A key design consideration is power budgeting: configure unused peripheral clocks off in the power management controller to minimize active-mode current, and exploit the low-power modes during idle periods. This page synthesizes verified distributor listings, drop-in alternatives within the SAM3N family, and practical design guidance not found on the manufacturer datasheet alone.

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ATSAM3N0AA-MU - 48MHz ARM Cortex-M3 MCU 32KB Flash | Microchip (Tape & Reel)
ATSAM3N0AA-MU

ATSAM3N0AA-MU - 48MHz ARM Cortex-M3 MCU 32KB Flash | Microchip (Tape & Reel)

The Microchip Technology ATSAM3N0AA-MU is a 32-bit ARM Cortex-M3 microcontroller operating at up to 48 MHz, integrating 32 KB of FLASH program memory and 8 KB of SRAM in a 48-pin QFN (7x7 mm) package with exposed pad, qualified for industrial temperature ranges. 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: MCU -> embedded processor -> application processor -> system-on-chip. MCUs execute real-time control tasks in power-sensitive and cost-sensitive designs where a full application processor is unnecessary. The SAM3N series belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, which also includes the SAM4N, SAM L, and megaAVR families. Key features of the ATSAM3N0AA-MU include the ARM Cortex-M3 core with Thumb-2 instruction set, integrated DMA controller for low-CPU-overhead data transfers, PWM channels for motor and lighting control, and a watchdog timer (WDT) for system reliability. The nested vectored interrupt controller (NVIC) provides deterministic low-latency interrupt response, while the low-power modes support battery-operated designs. Architecturally, the Cortex-M3 Harvard-structure core separates instruction and data buses, sustaining 1.25 DMIPS/MHz performance. Flash memory is accessible in a single wait state at full speed, and the peripheral bus structure allows independent peripheral clocking for aggressive power gating. Typical applications include industrial automation nodes, consumer appliance control boards, sensor hubs, metering front ends, and low-cost connectivity accessories. The 48 MHz ceiling and rich peripheral set fit control loops and human-interface tasks without paying for higher-speed cores. For design, budget the 32 KB flash carefully - application code plus bootloader must fit within the single erase-page management scheme, and pin-count planning should reserve pins for SWD programming and debug. This page synthesizes verified distributor pricing, drop-in family alternatives, and practical design notes not found on the manufacturer datasheet page alone.

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ATSAM3N0AA-MUR - 48MHz ARM Cortex-M3 MCU 32KB Flash | Microchip
ATSAM3N0AA-MUR

ATSAM3N0AA-MUR - 48MHz ARM Cortex-M3 MCU 32KB Flash | Microchip

The Microchip Technology ATSAM3N0AA-MUR is a 32-bit ARM Cortex-M3 microcontroller operating at up to 48 MHz, integrating 32 KB of FLASH program memory and 8 KB of SRAM in a 48-pin QFN (7x7 mm) package with exposed pad, qualified for industrial temperature ranges. 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: MCU -> embedded processor -> application processor -> system-on-chip. MCUs execute real-time control tasks in power-sensitive and cost-sensitive designs where a full application processor is unnecessary. The SAM3N series belongs to Microchip (formerly Atmel) ARM-based flash MCU portfolio, which also includes the SAM4N, SAM L, and megaAVR families. Key features of the ATSAM3N0AA-MUR include the ARM Cortex-M3 core with Thumb-2 instruction set, integrated DMA controller for low-CPU-overhead data transfers, PWM channels for motor and lighting control, and a watchdog timer (WDT) for system reliability. The nested vectored interrupt controller (NVIC) provides deterministic low-latency interrupt response, while the low-power modes support battery-operated designs. Architecturally, the Cortex-M3 Harvard-structure core separates instruction and data buses, sustaining 1.25 DMIPS/MHz performance. Flash memory is accessible in a single wait state at full speed, and the peripheral bus structure allows independent peripheral clocking for aggressive power gating. Typical applications include industrial automation nodes, consumer appliance control boards, sensor hubs, metering front ends, and low-cost connectivity accessories. The 48 MHz ceiling and rich peripheral set fit control loops and human-interface tasks without paying for higher-speed cores. For design, budget the 32 KB flash carefully - application code plus bootloader must fit within the single erase-page management scheme, and pin-count planning should reserve pins for SWD programming and debug. This page synthesizes verified distributor pricing, drop-in family alternatives, and practical design notes not found on the manufacturer datasheet page alone.

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ATSAM3N0BA-MU - 48MHz Cortex-M3 MCU 32KB Flash | Microchip
ATSAM3N0BA-MU

ATSAM3N0BA-MU - 48MHz Cortex-M3 MCU 32KB Flash | Microchip

The Microchip Technology ATSAM3N0BA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at 48 MHz with 32 KB FLASH program memory and 8 KB SRAM, housed in a 64-pin QFN (9x9 mm) surface-mount package from the SAM3N series. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, non-volatile memory for program storage, SRAM for data, and a rich set of peripherals onto one chip. The ARM Cortex-M3 is a 32-bit RISC processor core designed for cost-sensitive embedded applications, positioned above simple 8-bit PIC cores and below high-performance Cortex-M4/M7 cores within the embedded hierarchy. The SAM3N series is Microchip's (formerly Atmel's) entry-level, general-purpose Cortex-M3 family without USB or external bus interfaces, targeting cost- and power-sensitive designs. Key features of the ATSAM3N0BA-MU include the Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller (NVIC) for deterministic interrupt handling. The device operates from a single 1.62V to 3.6V supply and is specified for industrial temperature environments. Per the verified data, the part is graded industrial and supplied in a green, RoHS-compliant QFN package on tape and reel. The SAM3N series is explicitly pin-to-pin compatible with the legacy SAM7S (48- and 64-pin versions) and the SAM3S series (48- and 64-pin versions), enabling straightforward migration within the Atmel/Microchip ARM portfolio. This footprint compatibility is a major advantage for designs upgrading from ARM7TDMI-based SAM7S parts to the more efficient Cortex-M3. Typical applications include industrial control panels, consumer appliance interfaces, sensor aggregation nodes, motor control auxiliaries, and general-purpose embedded controllers where 48 MHz performance and 32 KB flash are sufficient and USB connectivity is not required. A key design consideration is memory margin: with only 32 KB flash and 8 KB SRAM, firmware size should be budgeted carefully; if growth is expected, pin-compatible SAM3N1/SAM3N2 variants with larger flash offer a no-PCB-change upgrade path. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3N0BA-MUR - 32-bit ARM Cortex-M3 MCU 48MHz 32KB | Microchip
ATSAM3N0BA-MUR

ATSAM3N0BA-MUR - 32-bit ARM Cortex-M3 MCU 48MHz 32KB | Microchip

The Microchip Technology ATSAM3N0BA-MUR is a 32-bit ARM Cortex-M3 microcontroller from the SAM3N series, operating at up to 48 MHz with 32KB of FLASH program memory and 8KB of SRAM, housed in a 64-pin QFN (9x9 mm) package. A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals, serving as the computational heart of embedded systems. Within the product hierarchy, the ARM Cortex-M3 core places the SAM3N in the 32-bit embedded microcontroller family, sitting above 8-bit MCUs in performance while consuming less power than higher-performance Cortex-M4 parts. The SAM3N family targets cost-sensitive, high-volume applications where integration and price dominate selection. Key features of the ATSAM3N0BA include a single-core Cortex-M3 RISC processor running at 48 MHz, 32KB of embedded FLASH, 8KB of SRAM, and connectivity peripherals including I2C (TWI), SPI, UART/USART, and IrDA. The device operates from a 1.8V to 3.3V supply and is rated for industrial temperature environments, per the Mouser listing (QFN, GREEN, IND TEMP, MRL A). Architecturally, the Cortex-M3 core features a 3-stage pipeline, Harvard bus structure, and a nested vectored interrupt controller (NVIC), enabling deterministic low-latency interrupt handling. The SAM3N0B integrates a power management controller with multiple sleep and wait modes, allowing designers to trade throughput for microamp-level standby current in battery-powered designs. Typical applications include industrial sensors and control nodes, consumer appliance interfaces, and building automation or metering front-ends. The rich UART/SPI/I2C connectivity and low pin count cost profile make it a strong fit for communication bridges and peripheral controllers. A key design consideration: the datasheet is published by Microchip (2018 revision referenced by FindIC), and the SAM3N series is pin-to-pin compatible with the SAM3S series, giving upgrade paths to parts with more FLASH and USB if requirements grow. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3N0CA-AU - ARM Cortex-M3 MCU 48MHz 32KB Flash | Microchip
ATSAM3N0CA-AU

ATSAM3N0CA-AU - ARM Cortex-M3 MCU 48MHz 32KB Flash | Microchip

The Microchip Technology ATSAM3N0CA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 32KB (32K x 8) flash memory, 8KB SRAM, and a 100-pin LQFP (14 x 14 mm) package in the industrial temperature range of -40C to +85C. A microcontroller (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 (MCU -> embedded processor -> application processor -> SoC). The SAM3N family belongs to Microchip's (formerly Atmel) ARM-based flash MCU portfolio, positioned for cost-sensitive, high-volume designs that still require 32-bit performance. Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Nested Vector Interrupt Controller (NVIC), and a 24-bit SysTick timer. The device integrates 16 channels of 10-bit ADC (440 ksps), one 10-bit DAC, and supply operation from 1.62V to 3.6V. Peripherals such as USART, SPI, TWI (I2C), PWM, and a Real-Time Clock support typical embedded connectivity and control tasks. Architecturally, the SAM3N series achieves high EMI tolerance and low power consumption, with multiple sleep modes and a VDDBU domain for RTC/backup operation. The flash-based program memory supports In-System Programming (ISP) via UART, and the core integrates a single-cycle multiply for DSP-style arithmetic. Typical applications include industrial control nodes, building automation, metering front-ends leveraging the 16-channel ADC, consumer appliance control boards, and cost-optimized Human-Machine Interface systems where the migration path to higher-memory SAM3S parts matters. Design consideration: the SAM3N series is pin-to-pin compatible with SAM7S and SAM3S devices, so designers should plan PCB footprints with memory upgrades in mind and verify ADC channel mapping when migrating. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N0CA-AUR - 48MHz Cortex-M3 MCU 32KB Flash | Microchip
ATSAM3N0CA-AUR

ATSAM3N0CA-AUR - 48MHz Cortex-M3 MCU 32KB Flash | Microchip

The Microchip Technology ATSAM3N0CA-AUR is a 32-bit ARM Cortex-M3 microcontroller running at 48 MHz with 32 KB FLASH program memory and 8 KB SRAM, housed in a 100-pin LQFP (14x14 mm) surface-mount package. It operates from a 1.62V to 3.6V supply (1.8V/2.5V/3V/3.3V rails) and integrates a 16-channel 10-bit ADC plus a 10-bit DAC. A microcontroller (MCU) is a single-chip computer that combines a processor core, memory, and peripherals on one die, sitting at the heart of embedded systems. Within the power-management hierarchy of a product, an MCU such as the SAM3N0C executes firmware, manages sensors and actuators, and handles communication. The SAM3N series belongs to Microchip's (formerly Atmel) ARM-based SAM family, positioned as a cost-optimized, low-power line for high-volume applications. Key features include the high-performance 32-bit Cortex-M3 RISC core with nested vectored interrupt controller, 32 KB of single-cycle flash with a page-erase architecture, and low power consumption suited to battery-operated designs. Peripherals include USART/UART serial ports, two-wire interface (TWI/I2C), SPI, timers/counters, PWM channels, and the 16-channel 10-bit ADC with 10-bit DAC, reducing external component count. Technically, the SAM3N0C leverages the ARMv7-M architecture with Thumb-2 instruction set, delivering efficient code density and deterministic interrupt latency. The flash accelerator keeps the 48 MHz core fed from wait-state-limited flash, while the multi-layer bus matrix (AHB-APB bridge) allows peripheral access without stalling the core. Typical applications include industrial control boards, consumer appliances, metering products, and sensor interfaces where the 16-channel ADC and rich serial connectivity are exploited at aggressive cost targets. A key design consideration: the SAM3N series is pin-to-pin compatible with the SAM3S series, giving designers a straightforward flash-upgrade or cost-down path on an unchanged PCB. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N0CA-CU - ARM Cortex-M3 48MHz MCU 32KB Flash | Microchip
ATSAM3N0CA-CU

ATSAM3N0CA-CU - ARM Cortex-M3 48MHz MCU 32KB Flash | Microchip

The Microchip Technology ATSAM3N0CA-CU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 32KB Flash program memory and 8KB SRAM, housed in a 100-ball TFBGA (9x9 mm) package. Operating from a 1.62V to 3.6V supply (1.8V/2.5V/3.3V typical rails), it belongs to the SAM3N series of entry-level, general-purpose MCUs. A flash microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, non-volatile program memory, SRAM data memory, and a rich set of peripherals onto one die. MCUs sit at the device level of the embedded-system hierarchy: microcontroller -> embedded processor -> system-on-chip, and they directly drive sensors, actuators, and communication links in end equipment. Key features of the ATSAM3N0CA-CU include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick counter, and a nested vector interrupt controller (NVIC). Peripherals and clocking support deterministic real-time behavior, while the green, halogen-free, RoHS-compliant TFBGA package conserves board area in dense layouts. The SAM3N series is pin-to-pin compatible with the legacy SAM7S (48- and 64-pin versions) and with the SAM3S series (48-, 64- and 100-pin versions), enabling firmware and board reuse across migration paths. Microchip supports the family with a complete set of software libraries, project examples, and development tools, shortening design cycles. Typical applications include consumer appliances, industrial sensing nodes, metering front ends, and PC peripherals where a balance of 48 MHz performance, low cost, and compact 100-ball packaging is required. Design consideration: the 9x9 mm TFBGA requires controlled-impedance PCB fan-out and reflow assembly; verify your CMOS process capability and plan power decoupling on all VDD/VDDIO ball pairs before layout. This page synthesizes distributor pricing context, drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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ATSAM3N1AA-AU - 32-bit ARM Cortex-M3 MCU 48MHz | Microchip
ATSAM3N1AA-AU

ATSAM3N1AA-AU - 32-bit ARM Cortex-M3 MCU 48MHz | Microchip

The Microchip Technology ATSAM3N1AA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz, with 64KB of FLASH program memory, 8KB of SRAM, and 47 general-purpose I/O lines, housed in a 48-pin LQFP (7x7 mm) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest tier of the embedded computing hierarchy: MCU -> embedded processor -> microprocessor-based system. The ATSAM3N1AA-AU belongs to Microchip (formerly Atmel) SMART ARM-based MCU family, sitting within the SAM3N series of cost-optimized Cortex-M3 devices. Key features include the ARM Cortex-M3 revision 2.0 core executing Thumb-2 instructions, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller (NVIC) for deterministic interrupt handling. The device operates from a 1.8V to 3.3V supply and uses an internal oscillator, reducing external component count and BOM cost. Program memory is 64KB (64K x 8) of embedded FLASH with 8KB (8K x 8) of SRAM for data and stack. Architecturally, the SAM3N series is the migration path from the SAM3S series for applications requiring reduced BOM cost, and it is pin-to-pin compatible with the SAM3S series. This allows designers to reuse PCB layouts and firmware across family members while scaling memory and peripherals. The aggressive price point and high integration push its scope into cost-sensitive, high-volume products. Typical applications include industrial control panels, consumer appliances, metering and sensor hubs, and building automation nodes where 32-bit performance is needed at 8-bit pricing. When designing with this part, budget the 8KB SRAM carefully for stack and buffers, and leverage the internal oscillator to eliminate crystals in cost-driven designs. The 47 I/O lines cover most mid-complexity embedded needs. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet alone. Pricing references are as of 2026-09-19.

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ATSAM3N1AA-MU - 48MHz ARM Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3N1AA-MU

ATSAM3N1AA-MU - 48MHz ARM Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3N1AA-MU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz, with 64 KB of Flash program memory and 8 KB of SRAM, housed in a 48-pin QFN (7x7 mm) package with exposed pad. It operates from a 1.62V to 3.6V single supply and provides up to 47 general-purpose I/O lines. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, sitting at the heart of embedded systems within the broader hierarchy of semiconductor devices: ARM Cortex-M3 core, 32-bit RISC microcontroller, flash MCU, system-on-chip. MCUs replace multi-chip processor-plus-peripheral designs, reducing BOM cost and board area in embedded products. 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) for deterministic interrupt handling. The ATSAM3N1AA-MU integrates a rich peripheral set typical of the SAM3N series, including UART/USART serial ports, SPI, TWI (I2C), a general-purpose clock-capable timer/counter block, an ADC, and a watchdog timer, enabling single-chip control of cost-sensitive systems. Technically, the SAM3N series is positioned as the ideal migration path from the SAM3S series for applications that require reduced BOM cost, and it is pin-to-pin compatible with SAM3S parts. Its aggressive price point and high level of integration push its scope of use into cost-sensitive, high-volume applications while preserving the Cortex-M3 tool chain and software reuse of the Atmel/Microchip ARM ecosystem. Typical applications include industrial control and automation nodes, consumer appliance interfaces, and embedded monitoring or metering systems that need 32-bit performance at 8-bit-class pricing. The 48 MHz core and hardware dividers handle control loops and communication stacks that would overload smaller 8-bit MCUs. A key design consideration: power the device from a clean 1.8V or 3.3V rail, decouple all supply pins with 100 nF ceramics placed close to the exposed-pad QFN, and solder the exposed pad to a ground plane for thermal and signal integrity. This page synthesizes distributor pricing, pin-to-pin drop-in alternatives within the SAM3N and SAM3S families, and practical design notes not found in the manufacturer datasheet.

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ATSAM3N1AB-AU - 48MHz Cortex-M3 64KB Flash MCU | Microchip
ATSAM3N1AB-AU

ATSAM3N1AB-AU - 48MHz Cortex-M3 64KB Flash MCU | Microchip

The Microchip Technology ATSAM3N1AB-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz with 64KB of flash memory, housed in a 48-pin LQFP (7x7 mm) surface-mount package. A microcontroller (MCU) integrates a processor core, program memory, RAM, and peripherals on a single chip, forming the lowest level of the embedded-system hierarchy: microcontroller unit (MCU) -> embedded processor -> semiconductor IC. The SAM3N1A belongs to the SAM3N series, built on the ARM Cortex-M3 RISC architecture with the Thumb-2 instruction set and a nested vector interrupt controller (NVIC). Key features include the ARM Cortex-M3 revision 2.0 core at 48 MHz, a 24-bit SysTick timer, flash memory of 64KB (64K x 8), operation from a 1.62V to 3.6V supply (1.8V/2.5V/3.3V rails), and capacitive-touch support via the Microchip QTouch library. The device is aggressive on price, targeting cost-sensitive high-volume designs. Technically, the SAM3N1A is pin-to-pin compatible with the SAM7S legacy products (48- and 64-pin versions) and the SAM3S series (48-, 64- and 100-pin versions), allowing board upgrades between Cortex-M3 and earlier ARM7 platforms with minimal redesign. Peripherals typically include UART/USART serial ports, SPI, TWI (I2C), timers, ADC channels, and direct capacitive-touch sensing, providing a complete low-power embedded control solution. Typical applications include industrial control nodes, consumer appliances, capacitive-touch human interface panels (buttons, wheels, sliders), and cost-sensitive high-volume embedded systems where a 32-bit core replaces 8-bit MCUs. When designing with this device, plan power sequencing for the 1.62V-3.6V supply range and verify legacy SAM7S/SAM3S pin mapping when migrating existing footprints. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a complete sourcing and selection resource.

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ATSAM3N1AB-MU - 48MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3N1AB-MU

ATSAM3N1AB-MU - 48MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3N1AB-MU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 48 MHz, with 64 KB (64K x 8) of embedded FLASH memory and 8 KB of SRAM, housed in a 48-pin QFN (7x7 mm) exposed-pad surface-mount package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die, sitting within the broader hierarchy of semiconductor devices: integrated circuit -> embedded processor -> ARM Cortex-M microcontroller. The SAM3N series, originally developed by Atmel and now manufactured by Microchip Technology, targets cost-sensitive, high-volume embedded applications where pin compatibility across family members enables easy migration and supply-chain flexibility. Key features of the ATSAM3N1AB-MU include the high-performance ARM Cortex-M3 RISC processor with Thumb-2 instruction set, 48 MHz maximum operating frequency, and 64 KB of single-cycle flash program memory. According to Microchip product documentation, the SAM3N series is pin-to-pin compatible with the SAM7S and SAM3S series, facilitating migration within the family when memory or peripheral requirements change. The device integrates standard communication peripherals typical of the SAM3N family, including USART, SPI, and TWI (I2C) interfaces, along with an ADC and general-purpose I/O, allowing a single chip to handle sensing, control, and communication in an embedded node. The aggressive price point and high integration level push its scope of use into cost-sensitive, high-volume applications, as stated in the SAM3N series datasheet. Typical applications include industrial control and automation nodes, consumer appliance interfaces, motor control panels, and battery-powered metering or sensing systems where a 32-bit core is required at 8/16-bit price levels. A key design consideration is power-supply decoupling: the 48-QFN exposed pad must be soldered to a solid ground plane for both thermal relief and signal integrity, and the industrial temperature-grade device should be operated within its rated conditions per the datasheet. This page synthesizes distributor pricing, stock availability, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATSAM3N1BA-AU - 48MHz ARM Cortex-M3 MCU 64KB Flash | Atmel
ATSAM3N1BA-AU

ATSAM3N1BA-AU - 48MHz ARM Cortex-M3 MCU 64KB Flash | Atmel

The Atmel (now Microchip Technology) ATSAM3N1BA-AU is a 32-bit ARM Cortex-M3 flash microcontroller running at up to 48 MHz, with 64 KB of Flash program memory, 8 KB of SRAM, and 47 general-purpose I/O lines, housed in a 64-pin LQFP (10x10 mm) package. A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single die, serving as the mid-level controller between simple 8-bit parts and full application processors. The SAM3N series sits within the broader ARM Cortex-M embedded controller hierarchy and is designed to converge performance and simplicity for cost-sensitive 32-bit designs. 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) for deterministic interrupt handling. The internal oscillator eliminates the need for an external crystal in many designs, and the device is pin-to-pin compatible with SAM7S legacy products (48- and 64-pin versions) and SAM3S devices, simplifying migration paths. Technical depth: the Cortex-M3 core provides Harvard architecture with separate instruction and data buses, hardware divide, and low-latency interrupt preemption. Flash memory executes code at full speed with an integrated controller, while the 8 KB SRAM supports typical control-loop and communication-buffer workloads at 48 MHz. Typical applications include industrial control, consumer appliances, metering, and general-purpose embedded systems where a modern 32-bit upgrade from 8-bit MCUs is desired without raising system cost. Design consideration: the -AU suffix denotes a lead-free, RoHS-compliant LQFP tray package rated for industrial temperature ranges; verify current consumption budget versus the lower-power SAM3N variants early in the design. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found on the manufacturer datasheet alone.

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ATSAM3N1BA-MU - 48MHz 64KB Cortex-M3 MCU | Microchip
ATSAM3N1BA-MU

ATSAM3N1BA-MU - 48MHz 64KB Cortex-M3 MCU | Microchip

The Microchip ATSAM3N1BA-MU is an ARM Cortex-M3 microcontroller with a 48 MHz operating frequency, 64 KB of programmable Flash memory, and 8 KB of SRAM, housed in a 64-QFN 9x9 mm package. It provides 47 I/O pins and uses an internal oscillator, making it suitable for cost-sensitive embedded systems that require substantial memory and peripheral integration in a compact surface-mount package. An ARM Cortex-M3 microcontroller is a 32-bit reduced-instruction-computing core designed for embedded control. In the product hierarchy, it combines a processor core, embedded Flash, static RAM, interrupt control, timers, communication interfaces, and GPIO into one microcontroller IC. The Cortex-M3 revision 2.0 core supports Thumb-2 instructions, while the 24-bit SysTick counter and Nested Vector Interrupt Controller support deterministic event handling in real-time firmware. Key features include 64 KB (64K x 8) program memory, 8K x 8 RAM, 47 I/O pins, and operation up to 48 MHz. The 64-QFN package provides a compact 9x9 mm surface-mount solution, while the supplied listing identifies tray packaging. The integration of memory, GPIO, and control peripherals can reduce the number of external components in compact industrial, consumer, communications, and control products. The device is identified as an ARM-based Flash MCU and belongs to the SAM3N family. Verified listings describe it as a 32-bit microcontroller with 64 KB Flash and 8 KB RAM. The available distributor data also identifies a 1.62 V to 3.6 V supply range for ATSAM3N1BA-MU. Detailed peripheral assignments, electrical limits, pin names, and package dimensions must be confirmed against the original Atmel or Microchip datasheet before PCB release. Typical applications include embedded control panels, low-cost sensor nodes, communications equipment, motor and relay control, industrial automation modules, and compact consumer products. The internal oscillator and integrated memory help simplify clock and memory design, while the 47 I/O pins provide interfaces for sensors, actuators, displays, and serial transceivers. Firmware must be selected for the exact ATSAM3N1BA-MU pinout and peripheral map. For a new layout, place decoupling close to the supply pins and route high-current or sensitive signals away from switching nodes. Before replacing another MCU, verify package dimensions, pin names, supply limits, peripheral functions, programming requirements, and bootloader compatibility. The SAM3N family is stated to be pin-to-pin compatible with the SAM3S series, but that family-level statement does not automatically establish drop-in compatibility for every MPN or package variant.

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ATSAM3N1BB-AU - 48MHz Cortex-M3 MCU 64KB Flash | Microchip
ATSAM3N1BB-AU

ATSAM3N1BB-AU - 48MHz Cortex-M3 MCU 64KB Flash | Microchip

The Microchip Technology ATSAM3N1BB-AU is a 32-bit ARM Cortex-M3 flash microcontroller operating at up to 48 MHz, with 64KB (64K x 8) of Flash memory, housed in a 64-pin LQFP (10 x 10 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 tier of the embedded processing hierarchy: MCU -> embedded processor -> application processor. The SAM3N family belongs to Microchip's (formerly Atmel's) ARM-based Flash MCU portfolio and sits in the cost-optimized, high-volume segment of that hierarchy, targeting applications that need 32-bit performance without the cost of higher-integration parts. Key features of the ATSAM3N1BB include the ARM Cortex-M3 revision 2.0 core running at up to 48 MHz, Thumb-2 instruction set support, a 24-bit SysTick counter, and a Nested Vector Interrupt Controller (NVIC). According to Microchip documentation, the SAM3N series offers up to 256KB Flash and up to 24KB SRAM across family variants, with the SAM3N1B specifically providing 64KB Flash. The green (Grn) LQFP package is RoHS-oriented for lead-free assembly. The most strategically important feature is pin compatibility: the SAM3N series is pin-to-pin compatible with the SAM7S legacy products (48- and 64-pin versions) and the SAM3S series (48-, 64-pin versions), which facilitates migration within the family and protects PCB investments across design generations. Typical applications include cost-sensitive industrial control boards, consumer appliances, metering front ends, and high-volume embedded systems where aggressive pricing and ARM ecosystem tooling matter more than maximum integration. Design consideration: choose the 64-pin LQFP variant only if you need the expanded I/O; the family also offers 48-pin options for lower-cost boards, and code is portable across the family via the CMSIS-compatible toolchain (Atmel/Microchip Studio, ARM GCC). This page synthesizes distributor pricing, pin-compatible SAM3N/SAM3S/SAM7S alternatives, and practical migration notes not consolidated on the manufacturer datasheet page.

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ATSAM3N1BB-AUR - Cortex-M3 MCU 48MHz 64KB Flash | Microchip
ATSAM3N1BB-AUR

ATSAM3N1BB-AUR - Cortex-M3 MCU 48MHz 64KB Flash | Microchip

The Microchip Technology ATSAM3N1BB-AUR is a 32-bit ARM Cortex-M3 microcontroller from the SAM3N series, operating at up to 48 MHz with 64KB of Flash program memory and 8KB of SRAM, housed in a 64-pin LQFP (10x10 mm) surface-mount package supplied in tape and reel. A microcontroller (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: ARM Cortex-M3 core -> 32-bit microcontroller -> embedded processor -> semiconductor device. The SAM3N family is Microchip/Atmel's entry-level, cost-optimized Cortex-M3 line, and the series is pin-to-pin compatible with the SAM3S series, enabling straightforward migration when USB or added memory is later required. Key features of the ATSAM3N1BB-AUR include a high-performance 32-bit RISC Cortex-M3 core with nested vectored interrupt controller, 64KB (64K x 8) of embedded Flash, 8KB of SRAM, a supply range of 1.8V to 3.3V, and industrial temperature operation (-40C to +85C). Peripherals include multiple serial communication interfaces (UART, SPI, I2C/TWI), a 10-bit ADC, timers, PWM channels, and general-purpose I/O, providing strong integration for cost-sensitive designs. Technically, the Cortex-M3 architecture delivers deterministic interrupt handling via the NVIC, a 3-stage pipeline, and Thumb-2 instruction density, allowing efficient C-language execution without external memory. The SAM3N integrates a power management controller with multiple sleep and wait modes, reducing average current in battery-powered systems. The green, halogen-free LQFP package with gull-wing terminals supports automated assembly and MSL-compliant reflow. Typical applications include industrial automation and control panels, consumer appliances, metering, lighting control, and PC/peripheral interfaces where a 48 MHz 32-bit core with rich serial connectivity is required at aggressive price points. Design consideration: supply the MCU from a clean 3.3V rail with local 0.1uF decoupling on each supply pin pair, and reserve the SAM3S pin-compatible footprint (e.g., ATSAM3S1BB) if USB may be needed in future product variants. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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