ATSAM4LS2AA-MUR - 48MHz Cortex-M4 128KB Flash MCU | Microchip
料号： ATSAM4LS2AA-MUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.65 | $4.65 |
| 10 | $4.19 | $41.90 |
| 100 | $3.72 | $372.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $2.98 | $2,980.00 |
ATSAM4LS2AA-MUR 概述
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals onto one die, serving as the lowest layer of the embedded-system hierarchy (MCU -> embedded processor -> system-on-chip -> computing system). The SAM4L series sits within Microchip's (formerly Atmel's) ARM-based Flash MCU portfolio, which spans the SAM3, SAM4, and SAM D/L/C families. As a Cortex-M4 class device, it combines 32-bit RISC processing with deterministic interrupt handling suited to real-time control.
The defining strength of the ATSAM4LS2AA-MUR is ultra-low power: Microchip specifies 90 uA/MHz in active mode, 1.5 uA in sleep mode, and wake-up times as short as 1.5 us, the lowest figures among Cortex-M4 Flash MCUs. Integrated peripherals include a USB device controller, a peripheral event system, and the SleepWalking feature, which lets peripherals wake the core only when a programmed event occurs, minimizing CPU active time.
Architecturally, the Cortex-M4 core delivers single-cycle multiply and hardware divide with a nested vectored interrupt controller (NVIC), while the 128KB Flash supports in-system programming. The peripheral event system routes signals between peripherals without CPU intervention, and low-power techniques such as dynamic clock gating reduce consumption in duty-cycled designs.
Typical applications include battery-powered sensor nodes, portable medical instruments, low-power industrial sensing, and USB-connected handheld devices where 90 uA/MHz active current and 1.5 uA sleep current directly extend battery life.
Design consideration: the 48-QFN exposed pad must be soldered to a grounded PCB thermal pad for reliable grounding and heat dissipation; supply is a single 3.3V rail per the datasheet.
This page synthesizes distributor pricing context, drop-in family alternatives, and low-power design notes not found in the manufacturer datasheet.
直接替换替代料： ATSAM4LS2AA-MUR ——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： ATSAM4LS2AA-MUR （相同外形与封装尺寸） ——差异在于 Packaging, Package, Flash Memory, Supply Voltage, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
ATSAM4LS2AA-MU
✅ 直接替换✓ 有现货
$3.55 / 个
查看数据手册 →ATSAM4LS4AA-MU
✅ 直接替换✓ 有现货
$3.95 / 个
查看数据手册 →ATSAM4LS2CA-MUR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM4LS2BA-MUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.4 / 个
查看数据手册 →ATSAM4LS8AA-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →ATSAM4LS2AA-MUR 最大额定值与电气特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| 最大时钟频率 | 48 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| 电源电压 | 3.3 V |
| Active Mode Current | 90 uA/MHz |
| Sleep Mode Current | 1.5 uA |
| Wake-up Time | 1.5 us (minimum) |
| USB | USB Device |
| Special Features | Peripheral Event System, SleepWalking |
| 封装 | 48-QFN (7x7 mm) Exposed Pad |
| 引脚数 | 48 |
| 安装类型 | Surface Mount |
| Temperature Grade | Industrial |
| Packaging | Tape & Reel (MRL A, T&R) |
| RoHS 状态 | Green / Compliant |
ATSAM4LS2AA-MUR 48-qfn (7x7 mm) exposed pad 引脚配置指南
ATSAM4LS2AA-MUR（48-qfn (7x7 mm) exposed pad 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： ATSAM4LS2AA-MUR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM4LS2AA-MUR 适用于 6 应用s: Battery-Powered IoT Sensor Nodes, Portable Medical Instruments, USB-Connected Handheld Devices, Low-Power Industrial Sensing, Wearable and Fitness Devices, Smart Metering and Data Logging.
Battery-Powered IoT Sensor Nodes
The ATSAM4LS2AA-MUR is a leading choice for coin-cell or AA-powered wireless sensor nodes because its 90 uA/MHz active current and 1.5 uA sleep current minimize the dominant energy cost of duty-cycled operation. The SleepWalking feature allows low-power peripherals to monitor sensor thresholds and wake the 48 MHz Cortex-M4 core only when data is ready, and the 1.5 us wake-up time means the CPU never wastes battery on idle spin-up. Combined with a sub-GHz or BLE radio over SPI/USART, a node can sample for milliseconds and sleep for seconds, achieving multi-year battery life on 128KB of program code and 32KB of working RAM.
推荐
Portable Medical Instruments
Portable medical devices such as glucose meters, pulse oximeters, and wearable vital-sign monitors benefit from the ATSAM4LS2AA-MUR's combination of 32-bit processing headroom and ultra-low standby draw. The 1.5 uA sleep current preserves battery charge between patient measurements, while the Cortex-M4 core executes digital filtering and calibration algorithms at 48 MHz. The 128KB Flash stores firmware plus calibration tables, and the industrial temperature grade supports autoclave-adjacent storage conditions. The USB device controller enables direct data offload to clinic PCs without an external USB chip, simplifying the bill of materials in space-constrained handheld enclosures.
推荐
USB-Connected Handheld Devices
The integrated USB device controller makes the ATSAM4LS2AA-MUR well suited for handheld data loggers, inspection tools, and battery-powered accessories that connect to PCs or phones. USB enumeration and data transfers run without an external PHY or controller, and SleepWalking lets the USB block detect bus activity while the core sleeps, drawing only 1.5 uA until a host initiates communication. The 48 MHz Cortex-M4 sustains practical USB full-speed throughput while leaving cycles for application logic, and the 7x7 mm 48-QFN package fits slim handheld enclosures with a four-layer PCB.
推荐
Low-Power Industrial Sensing
In industrial environments, the ATSAM4LS2AA-MUR serves condition-monitoring and process-sensing endpoints where wiring power is impractical. Its industrial temperature grade meets factory-floor requirements, the 32KB SRAM buffers sampled waveform data, and the peripheral event system links ADC completion events to DMA or timers without CPU intervention, cutting active time. The 90 uA/MHz efficiency suits energy-harvesting and loop-powered sensor designs, while the Cortex-M4 core runs FFT-based vibration analysis locally, sending only processed features upstream. The 3.3V single-rail supply simplifies integration with standard industrial sensor front ends.
推荐
Wearable and Fitness Devices
Wearables demand minimal average current under continuous sensor polling, exactly the profile of the ATSAM4LS2AA-MUR. The 1.5 us wake-up lets the MCU service accelerometer or heart-rate interrupts with microsecond latency and return to 1.5 uA sleep almost immediately, while the 7x7 mm 48-QFN exposed-pad package minimizes PCB area in wrist-worn form factors. The 128KB Flash accommodates BLE-stack-free proprietary links or sensor fusion code, and the 32KB SRAM supports running buffers for motion data. Industrial temp rating also covers body-worn charging thermal excursions.
推荐
Smart Metering and Data Logging
Smart energy and utility meters require decade-long battery or energy-harvest budgets, making the SAM4L series' 90 uA/MHz and 1.5 uA sleep figures decisive. The ATSAM4LS2AA-MUR's peripheral event system timestamps meter pulses in hardware while the core sleeps, and the 128KB Flash supports field-updatable firmware with dual-image bootloaders. The Cortex-M4 core computes consumption statistics and CRC-protected frame formatting for wired or radio uplinks. Its 48 MHz performance headroom handles metrology algorithms such as RMS computation on sampled current and voltage channels within tight duty-cycle windows.
推荐
推荐产品汇总
工程参考数据： ATSAM4LS2AA-MUR ——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 | ATSAM4LS2AA-MU | ATSAM4LS4AA-MU | ATSAM4LS2CA-MUR | ATSAM4LS2BA-MUR |
|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) EP | 48-QFN (7x7 mm) EP - same | 48-QFN (7x7 mm) EP - same | 48-QFN (7x7 mm) EP - same | 48-QFN (7x7 mm) EP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Frequency | Cortex-M4, 48 MHz | Cortex-M4, 48 MHz | Cortex-M4, 48 MHz | Cortex-M4, 48 MHz | Cortex-M4, 48 MHz |
| Active Current | 90 uA/MHz | 90 uA/MHz | 90 uA/MHz (same family) | 90 uA/MHz (same family) | 90 uA/MHz (same family) |
| Sleep Current | 1.5 uA | 1.5 uA | 1.5 uA (same family) | 1.5 uA (same family) | 1.5 uA (same family) |
| USB | USB Device | USB Device | USB Device | USB Device | USB Device |
| Packaging / Delivery | Tape & Reel (T&R) | Tray | Tray | Tape & Reel | Tape & Reel |
关键差异点
- Industry-leading active efficiency （对比 ATSAM4LS4AA-MU)
- Identical die in tray packaging （对比 ATSAM4LS2AA-MU)
- Memory headroom upgrade path on same footprint （对比 ATSAM4LS2CA-MUR)
设计说明
The 48-QFN (7x7 mm) exposed pad must be connected to a solid ground plane through an array of thermal vias (typically a 3x3 or 4x4 via pattern under the pad). The exposed pad is the primary ground return for the die; relying only on perimeter ground pins increases ground bounce and degrades analog peripheral performance. Follow Microchip's QFN land-pattern recommendation in the SAM4L datasheet for stencil aperture design.
To realize the specified 1.5 uA sleep current, all unused GPIOs must be configured as outputs driven low or as inputs with defined levels - floating inputs leak through input buffers and can dominate the sleep budget. Disable the BOD and debug interface in production firmware, and verify measured sleep current on your PCB rather than trusting the datasheet figure, since board leakage often exceeds the MCU's own 1.5 uA.
Decouple each VDD pin with 100 nF ceramics placed within 2 mm of the pin, plus one bulk 4.7-10 uF per supply domain. Keep the USB D+/D- traces as a matched 90-ohm differential pair routed away from switching clocks. To exploit SleepWalking, route peripheral event connections using the internal event system rather than external GPIO loops, which adds latency and board noise.
The SAM4L family uses multiple clock sources (oscillators, PLL, DFLL); a common firmware error is waking from sleep before the selected clock stabilizes, causing spurious behavior. Use the clock-switching sequence in the datasheet and enable the appropriate ready interrupts. Also confirm the industrial temperature grade matches your soldering profile - MRL A finish requires standard lead-free reflow peak temperatures.
合规信息
Listed by Mouser as QFN, GREEN, IND TEMP MRL A, T&R - Microchip GREEN designation indicates lead-free, halogen-free green packaging. Verify RoHS/REACH certificates on the Microchip product page. Industrial grade, not automotive AEC-Q100 qualified.