ATSAM3N0AA-AUR - 48MHz Cortex-M3 MCU 32KB Flash LQFP-48 | Microchip
料号： ATSAM3N0AA-AUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.65 | $3.65 |
| 10 | $3.29 | $32.90 |
| 100 | $2.92 | $292.00 |
| 500 | $2.63 | $1,315.00 |
| 1,000 | $2.38 | $2,380.00 |
ATSAM3N0AA-AUR 概述
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.
直接替换替代料： ATSAM3N0AA-AUR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAM3N0AA-AUR （相同外形与封装尺寸） ——差异在于 Package, Packaging, Operating Temperature, Connectivity, Core Processor.
快速对比工具——选择替代料号进行并排对比：
ATSAM3N0BA-AUR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM3N0CA-AUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.45 / 个
查看数据手册 →ATSAM3N00AA-AUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.61 / 个
查看数据手册 →ATSAM3N0AA-AU
✅ 直接替换✓ 有现货
$2.58 / 个
查看数据手册 →ATSAM3A4CA-AU
✅ 直接替换✓ 有现货
$12.3 / 个
查看数据手册 →ATSAM3N0AA-AUR 最大额定值与电气特性
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-bit single-core |
| 最大时钟频率 | 48 MHz |
| Flash Memory | 32KB (32K x 8) |
| SRAM | 8KB (8K x 8) |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Peripherals | DMA, WDT, PWM |
| Connectivity | UART/USART, SPI, I2C (two-wire interface) |
| 工作温度 | -40C to +85C (industrial) |
| 封装 | 48-LQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| RoHS 状态 | Compliant (GREEN, per Mouser listing) |
| Oscillator Type | Internal |
| Program Memory Type | FLASH |
ATSAM3N0AA-AUR 48-lqfp (7x7 mm) 引脚配置指南
ATSAM3N0AA-AUR（48-lqfp (7x7 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATSAM3N0AA-AUR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM3N0AA-AUR 适用于 6 应用s: Industrial Control and Automation, Consumer Appliances, Metering and Smart Energy, Battery-Powered Sensor Nodes, Embedded Networking and Gateways, Test and Measurement Accessories.
Industrial Control and Automation
The ATSAM3N0AA-AUR fits industrial control nodes that need deterministic 32-bit interrupt handling at low cost. Its 48 MHz Cortex-M3 with nested vectored interrupt controller handles timed control loops and communication polling without an RTOS in many cases, while 32KB Flash accommodates Modbus-style protocol stacks. The industrial -40C to +85C rating matches factory-floor ambient requirements, and UART/USART plus SPI connectivity links PLC I/O modules, motor controllers, and HMI front ends. Using DMA offloads data movement between peripherals and the 8KB SRAM, keeping CPU cycles free for control logic. At 3.3V supply it interfaces directly with standard industrial logic levels, reducing glue components on the control board.
推荐
Consumer Appliances
In appliances such as coffee makers, air conditioners, and small kitchen equipment, the ATSAM3N0AA-AUR provides the user-interface and motor-control brain. The 32KB Flash stores touch-button decoding, display driving, and simple control state machines, while 8KB SRAM supports the runtime stack comfortably. Its 1.62V-3.6V operation allows direct connection to a 3.3V rail derived from appliance offline supplies. The device's low-power modes help designs comply with standby power regulations: the core clocks down or sleeps between user inputs, waking on UART or GPIO events. The 48-pin LQFP provides enough GPIO for a 7-segment/LCD driver arrangement, relay outputs, and sensor inputs on a single low-cost controller.
推荐
Metering and Smart Energy
Energy meters and sub-metering units benefit from the ATSAM3N0AA-AUR's combination of 32-bit math capability and low quiescent power. The Cortex-M3's hardware divide accelerates energy computation from ADC sample streams brought in over SPI or USART, and the 32KB Flash holds metrology firmware plus communication stacks for RS-485 or RF modules. Battery-backed real-time tasks run in low-power modes with wake sources from the USART, supporting load-profile recording. The industrial temperature rating covers outdoor meter enclosures, and the 7x7 mm LQFP-48 conserves PCB area in single-phase meter form factors. DMA-driven serial transfer keeps sample data flowing without CPU polling overhead during peak integration windows.
推荐
Battery-Powered Sensor Nodes
Wireless and wired sensor nodes use the ATSAM3N0AA-AUR for its low-power mode architecture: the core sleeps in backup or wait mode and wakes on RTC or peripheral events to sample, process, and transmit. The 1.62V low end of the supply range allows operation directly from a partially discharged lithium cell via an LDO with small dropout. 32KB Flash stores sensor compensation code and a lightweight protocol stack, while SPI and I2C interfaces connect MEMS sensors and radio modules. The 48 MHz core executes DSP-style filtering fast enough to return to sleep quickly, which dominates average current in duty-cycled designs. This makes the part suitable for environmental monitoring, asset tracking beacons, and smart-building sensors.
推荐
Embedded Networking and Gateways
As a bridge controller, the ATSAM3N0AA-AUR links two or more serial domains - for example USB-adjacent sensing clusters to an RS-485 backbone - using its UART/USART and SPI resources. The 48 MHz Cortex-M3 handles protocol translation, buffering through the 8KB SRAM with DMA assistance, and CRC-checked framing without external FIFOs. Its 32KB Flash is sufficient for stack implementations where one side is a simple point-to-point protocol and the other a master poll loop. The watchdog timer enforces recovery from bus fault conditions, important in unattended network equipment. The industrial temperature grade and GREEN RoHS-compliant LQFP-48 packaging align with networking hardware build requirements and automated assembly processes.
推荐
Test and Measurement Accessories
Handheld meters, data loggers, and bench accessories use the ATSAM3N0AA-AUR where measurement math and USB/serial reporting must coexist on a tight power budget. The Cortex-M3 core performs calibration curve fitting, unit conversion, and display formatting at 48 MHz, while DMA-driven USART streams logged data to a host. The 32KB Flash accommodates calibration tables and a command interpreter; 8KB SRAM buffers measurement bursts. Low-power modes extend battery life between charges in portable instruments, and the -40C to +85C rating supports outdoor field testing. The 48-pin LQFP leaves GPIO for keypad scanning, LCD segments, and analog front-end control lines within one compact controller footprint.
推荐
推荐产品汇总
工程参考数据： ATSAM3N0AA-AUR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAM3N0BA-AUR | ATSAM3N0CA-AUR | ATSAM3N00AA-AUR | ATSAM3N0AA-AU | ATSAM3A4CA-AU |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP - verify pinout |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Frequency | ARM Cortex-M3 / 48 MHz | ARM Cortex-M3 / 48 MHz | ARM Cortex-M3 / 48 MHz | ARM Cortex-M3 / 48 MHz | ARM Cortex-M3 / 48 MHz | ARM Cortex-M3 / 48 MHz |
| Flash Memory | 32KB | 32KB | 64KB | 16KB | 32KB | 256KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Special Features | DMA, WDT, low-power modes | DMA, WDT, added peripheral set | DMA, WDT, doubled flash | DMA, WDT, cost-optimized | Identical die, tray packaging | CAN controller, 2x USART, large flash |
关键差异点
- Balanced 32KB Flash / 8KB SRAM at entry-level cost （对比 ATSAM3N0CA-AUR)
- Full flash headroom vs cost-down variant （对比 ATSAM3N00AA-AUR)
- Same die, Tape & Reel for automated assembly （对比 ATSAM3N0AA-AU)
设计说明
Operate the ATSAM3N0AA-AUR from a clean 3.3V rail within the 1.62V-3.6V range. Decouple each VDD/VDDIO pin pair with 100nF ceramic capacitors placed within 2mm of the pins, plus one bulk 4.7-10uF capacitor near the supply entry. Gate unused peripheral clocks in the Power Management Controller - each enabled peripheral clock adds leakage and active current even when idle. For battery designs, enter wait mode between events and wake via USART or RTC; configure wake latency against your sampling deadline.
The 48-LQFP 7x7 mm footprint uses 0.5mm pitch; design land patterns per the Microchip SAM3N datasheet recommended dimensions to avoid solder bridging. Provide a solid ground plane on layer 2 for signal return. Route the SWDIO/SWCLK debug pins to a 2x5 or tagged test point header even in production boards - in-system programming via SAM-BA or an external debugger requires them and eliminates costly rework for firmware updates.
Do not assume pin function defaults: SAM3N GPIO mux assignments must be configured in software before peripherals are usable, and floating input pins increase current consumption - tie unused GPIO to defined states or enable internal pull-ups. Verify flash capacity budget including bootloader before committing to the 32KB N0AA over the 64KB N0CA; both share the same footprint, so late migration is mechanical but firmware reconfiguration is still required.
合规信息
Mouser listing identifies 'LQFP, GREEN, IND TEMP, MRL' - GREEN denotes Microchip RoHS-compliant, halogen-free packaging. REACH and conflict minerals status not stated in provided data.