ATSAM4LS4AA-AU - 48MHz Cortex-M4 MCU 256KB Flash | Microchip
部品番号: ATSAM4LS4AA-AU ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.3 | $63.00 |
| 100 | $5.75 | $575.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $5.1 | $5,100.00 |
ATSAM4LS4AA-AU 概要
A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single chip, sitting at the center of the embedded systems hierarchy: semiconductor -> integrated circuit -> microcontroller -> 32-bit ARM-based MCU. MCUs replace discrete processor-plus-peripherals combinations in cost- and power-sensitive designs.
Key features include the Cortex-M4 core with DSP instructions and FPU-class math support at 48 MHz, 256KB Flash with a dual-bank safe architecture, 16KB SRAM plus an additional 32KB... . The device provides a USB device port, a Peripheral Event System for inter-peripheral signaling without CPU intervention, and SleepWalking, which lets peripherals wake and act while the core sleeps.
The ATSAM4LS4AA-AU uses the picoPower-class SAM4L architecture with multiple sleep modes and hierarchical clock gating, achieving 1.5 uA in sleep mode. Data written into a RAM-based cache plus a Flash accelerator keeps core cycle efficiency high at 48 MHz.
Typical applications are battery-powered sensor nodes, wearable and portable medical devices, USB-connected instrument front ends, and low-power industrial monitoring where long battery life and fast wake-up dominate the design.
Design consideration: budget the 90 uA/MHz active current against total system duty cycle; frequent wake-ups favor this device because wake-up takes only 1.5 us.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ATSAM4LS4AA-AU — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATSAM4LS4AA-AU （同一形状・フットプリント） — 相違点: Wake-up Time, Core Processor, Package, Series, Flash Memory.
クイック比較ツール — 並列比較する代替部品を選択:
ATSAM4LS4BA-AU
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.02 / 個
データシートを見る →ATSAM4LC4AA-AU
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →ATSAM3S4AA-AU
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATSAM4LS4AA-AU 最大定格＆電気的特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit |
| 最大クロック周波数 | 48 MHz |
| Flash Memory Size | 256 KB (256K x 8) |
| Active Mode Current | 90 uA/MHz |
| Sleep Mode Current | 1.5 uA |
| Wake-up Time | 1.5 us |
| パッケージ | 48-TQFP (7x7 mm) |
| 実装タイプ | Surface Mount |
| USB | USB Device |
| Peripheral Event System | Yes |
| SleepWalking | Yes |
| Security | Crypto peripherals (per Mouser listing: CRYPTO) |
| Packaging Option | Tray (per Mouser MRL listing) |
ATSAM4LS4AA-AU 48-tqfp (7x7 mm) ピン配置ガイド
ATSAM4LS4AA-AU (48-tqfp (7x7 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATSAM4LS4AA-AU.
詳細は データシート をご参照ください。
主な用途
ATSAM4LS4AA-AU の用途: 6 件s: Battery-Powered Sensor Nodes, USB-Connected Instruments and Dongles, Wearable and Portable Medical Devices, Industrial Condition Monitoring, Smart Metering and Energy Monitoring, Consumer IoT and Smart Home Hubs.
Battery-Powered Sensor Nodes
The ATSAM4LS4AA-AU fits battery-powered wireless sensor nodes because average current, not peak speed, dominates battery life in duty-cycled sensing. Its 90 uA/MHz active current and 1.5 uA sleep current allow the node to sleep most of the time and burst at 48 MHz when sampling or transmitting. The 1.5 us wake-up time is fast enough that radio or ADC startup dominates, not MCU wake, eliminating the common penalty of sleeping deeply. With SleepWalking, the ADC and timer peripherals capture samples while the core remains in sleep, further cutting average draw to microamp levels in periodic-measurement applications such as environmental monitoring.
おすすめ
USB-Connected Instruments and Dongles
The integrated USB device controller makes the ATSAM4LS4AA-AU a strong fit for USB dongles, sensor bridges, and bench instrument front ends that enumerate and stream data to a host PC. The 256KB Flash accommodates USB protocol stacks plus application logic without external memory, and the Cortex-M4 core handles data formatting at 48 MHz. Because the SAM4L USB peripheral can operate under SleepWalking-style event control, the MCU can stay in low-power sleep between host transactions, reducing standby current in always-plugged USB accessories. The 48-TQFP 7x7 mm package keeps the mechanical footprint small enough for thumb-drive-class enclosures.
おすすめ
Wearable and Portable Medical Devices
Wearable medical devices such as vital-sign monitors and activity trackers benefit directly from the ATSAM4LS4AA-AU's power profile: 90 uA/MHz active, 1.5 uA sleep, and 1.5 us wake-up let the device sample heart-rate or motion signals hundreds of times per second while averaging only tens of microamps. The Peripheral Event System routes ADC results to comparators or timers without CPU involvement, supporting always-on biosignal monitoring. Per Mouser's listing, the part is offered in industrial temperature grade, supporting body-worn product reliability testing. The 7x7 mm TQFP is hand-assemblable for prototyping yet compact for wearables.
おすすめ
Industrial Condition Monitoring
In industrial condition-monitoring equipment, the ATSAM4LS4AA-AU periodically samples vibration, temperature, or current sensors and reports over wired or wireless links. The industrial temperature rating noted in Mouser's listing supports factory-floor environments, while the Cortex-M4 core at 48 MHz runs FFT-based vibration analysis locally, sending only result summaries rather than raw waveforms. SleepWalking allows the timer and ADC to operate autonomously between measurement windows, keeping standby current at 1.5 uA in battery- or energy-harvesting-powered installations. The 256KB Flash holds DSP libraries, communication stacks, and calibration tables without external storage.
おすすめ
Smart Metering and Energy Monitoring
Smart meter front ends require continuous sampling with long battery backup life, a combination the ATSAM4LS4AA-AU serves well. The 48 MHz Cortex-M4 core executes metering algorithms including RMS computation and harmonic analysis with DSP instructions, while SleepWalking lets the ADC and RTC peripherals maintain measurement schedules at microamp average current. The 1.5 us wake-up ensures no samples are missed when the core resumes. Per the Microchip product page, the SAM4L family achieves the lowest active power of any Cortex-M4 device, directly translating to longer backup-battery life in metering deployments where 10+ year field life is expected.
おすすめ
Consumer IoT and Smart Home Hubs
Smart-home sensor peripherals - door/window contacts, motion detectors, remote controls - are classic ultra-low-power MCU loads for the ATSAM4LS4AA-AU. The device spends nearly all time in 1.5 uA sleep, wakes in 1.5 us on a button press or radio interrupt, and uses the Peripheral Event System to debounce inputs and sequence tasks with minimal CPU time. The USB device port supports configuration and firmware-update connections to a host. The 48-TQFP 7x7 mm package with industrial temperature grade (per Mouser) covers both indoor electronics and garage/outdoor sensor placements common in smart-home deployments.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATSAM4LS4AA-AU — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATSAM4LS4BA-AU | ATSAM4LC4AA-AU | ATSAM3S4AA-AU |
|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M3 |
| Flash Memory | 256 KB | 128 KB | 256 KB | 128 KB |
| Hardware Crypto | No (LS variant; Mouser lists CRYPTO for family) | No | Yes (LC Crypto variant) | No |
| USB Device | Yes | Yes | Yes | Yes |
主な差別化要因
- Best-in-class active power in any Cortex-M4 device （vs ATSAM3S4AA-AU)
- Double the Flash of the smaller same-footprint variant （vs ATSAM4LS4BA-AU)
- Cost-optimized versus the Crypto variant when security is not required （vs ATSAM4LC4AA-AU)
設計ノート
Budget power around duty cycle, not peak current. At 90 uA/MHz, running the 48 MHz core continuously draws roughly 4.3 mA (estimated: 90 uA/MHz x 48 MHz); a 10% duty cycle drops the average CPU current to about 0.43 mA before peripherals. For battery designs, place the MCU in the deepest appropriate sleep mode between events and rely on the 1.5 us wake-up so sleep depth can be aggressive. Use SleepWalking so ADC and timers sample autonomously while the core sleeps - this is the single largest average-current saving the SAM4L architecture offers.
Decouple every VDDIO/VDDCORE/VDDIN pin pair with 100 nF ceramics placed within 2 mm of the pins, and add bulk 4.7-10 uF near the supply entry. Keep the USB D+/D- traces as a 90-ohm differential pair routed away from the crystal. Use 1% load capacitors matched to the crystal specification on XIN32/XOUT32, since the 32 kHz RTC crystal accuracy directly determines long-term sleep-mode timing and wake-up scheduling in duty-cycled applications.
Do not assume Flash size portability across family members: the pin-compatible ATSAM4LS4BA-AU has 128KB versus this part's 256KB, and the ATSAM3S4AA-AU is a Cortex-M3 without M4 DSP instructions - code using DSP intrinsics or the FPU-class math pipeline will not compile or will run far slower. When substituting, regenerate linker scripts for the reduced Flash/SRAM and re-verify analog peripheral mapping, since multiplexed pin functions differ between SAM3S and SAM4L despite the shared TQFP-48 footprint.
コンプライアンス情報
Mouser listing notes 'Green' packaging for this part; explicit RoHS/REACH declarations not present in provided data - verify on Microchip's product compliance page.
