ATSAM4LS2AA-MUR - 48MHz Cortex-M4 128KB Flash MCU | Microchip
MPN: ATSAM4LS2AA-MUR ✓ פעילATSAM4LS2AA-MUR סקירה
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.
חלופות תחליף ישיר עבור ATSAM4LS2AA-MUR — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ATSAM4LS2AA-MUR (אותו גורם צורה וטביעת רגל) — שונים ב Packaging, Package, Flash Memory, Supply Voltage, RoHS Status.
ATSAM4LS2AA-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAM4LS4AA-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAM4LS2CA-MUR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ATSAM4LS2BA-MUR
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAM4LS8AA-MU
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAM4LS2AA-MUR דירוגים מרביים ומאפיינים חשמליים
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| תדר שעון מקסימלי | 48 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| מתח אספקה | 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 |
| מארז | 48-QFN (7x7 mm) Exposed Pad |
| מספר פינים | 48 |
| סוג הרכבה | Surface Mount |
| Temperature Grade | Industrial |
| Packaging | Tape & Reel (MRL A, T&R) |
| סטטוס RoHS | Green / Compliant |
מדריך תצורת פינים של ATSAM4LS2AA-MUR 48-qfn (7x7 mm) exposed pad
תצורת פינים עבור ATSAM4LS2AA-MUR (מארזת 48-qfn (7x7 mm) exposed pad). מעגל משולב דיגיטלי זה כולל GPIO, ממשקי תקשורת (UART, SPI, I2C) ופיני מתח. יש לעיין בגיליון הנתונים של היצרן לפונקציות פינים חלופיות ולאפשרויות תצורה. חיוני לתכנון מערכות משובצות ולפריסת PCB.
אין נתוני פריסת פינים מפורטים עבור ATSAM4LS2AA-MUR.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
ATSAM4LS2AA-MUR מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATSAM4LS2AA-MUR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Industry-leading active efficiency (לעומתATSAM4LS4AA-MU)
- Identical die in tray packaging (לעומתATSAM4LS2AA-MU)
- Memory headroom upgrade path on same footprint (לעומתATSAM4LS2CA-MUR)
הערות תכנון
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.
מידע על תאימות
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.