ATSAM4LS2BA-AU - 48MHz Cortex-M4 128KB MCU | Microchip
Référence : ATSAM4LS2BA-AU ✓ ActifATSAM4LS2BA-AU Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, nonvolatile program memory, volatile data memory, peripherals, and communication interfaces on one device. The ATSAM4LS2B belongs to the SAM4L product family within the broader ARM Cortex-M4 microcontroller category. This combination of processing capability, memory, and compact packaging supports compact embedded-control, sensor-processing, communications, and industrial automation products.
Principal features include a 32-bit Cortex-M4 core operating up to 48 MHz, 128 KB of flash for firmware, and 32 KB of SRAM for working data. The 64-pin TQFP package exposes a broad set of GPIO and peripheral functions while providing adequate routing flexibility for multilayer boards. Industrial temperature rating, green-device construction, and cryptographic capability make the device suitable for embedded products requiring controlled operation and secure data-handling functions.
The SAM4L architecture is designed for low-power embedded systems that require more computation than an 8-bit or 16-bit controller without moving to a higher-performance Cortex-M processor class. Its 48 MHz Cortex-M4 core supports efficient control-loop execution and peripheral coordination. The exposed pad beneath the TQFP package provides a direct thermal path to the PCB copper, helping remove heat generated during sustained processor activity.
Typical uses include industrial sensor nodes, building-control equipment, compact data-acquisition devices, motor and process-control modules, communications equipment, and battery-operated embedded products. The 128 KB flash capacity allows substantial application firmware and configuration data, while 32 KB SRAM supports buffers, protocol stacks, and real-time working variables.
PCB design should preserve the manufacturer’s pin assignments and exposed-pad connection. Decoupling capacitors should be placed close to the appropriate supply pins, and the exposed pad should be connected to the designated ground plane using the package land pattern. Review voltage, clock, programming, and peripheral constraints in the manufacturer datasheet before releasing the PCB.
This product record combines the core device specifications, package details, application guidance, and same-family replacement options to support faster engineering evaluation. It also highlights the practical differences in memory capacity and sourcing characteristics among compatible SAM4L configurations.
Alternatives de remplacement direct pour ATSAM4LS2BA-AU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAM4LS2BA-AU (même facteur de forme et même empreinte) — différant par Core Processor, Flash Memory, Package, SRAM, Supply Voltage.
ATSAM4LS4BA-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ATSAM4LS8BA-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ATSAM4LS16BA-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATSAM4LS2BA-AU Valeurs maximales et caractéristiques électriques
| Product Type | 32-bit ARM Cortex-M4 microcontroller |
| Processor Core | ARM Cortex-M4 |
| Architecture | 32-bit |
| Maximum Operating Frequency | 48 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB (32K x 8) |
| Tension d'alimentation | 3.3 V |
| Nombre de broches | 64 pins |
| Package Type | 64-pin TQFP |
| Package Dimensions | 10 mm x 10 mm |
| Exposed Thermal Pad | Yes |
| Temperature Grade | Industrial |
| Température de fonctionnement | -40 °C to +85 °C |
| Cryptographic Capability | Yes |
| Green Device | Yes |
| Type de montage | Surface mount |
| Terminal Form | Gull wing |
Guide de configuration des broches du ATSAM4LS2BA-AU 10 mm x 10 mm
Configuration des broches du ATSAM4LS2BA-AU (boîtier 10 mm x 10 mm). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATSAM4LS2BA-AU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATSAM4LS2BA-AU convient pour 6 applications: Industrial Sensor Nodes, Building Automation Equipment, Compact Data-Acquisition Systems, Communications Equipment, Process and Motor-Control Modules, Battery-Operated Embedded Products.
Industrial Sensor Nodes
The ATSAM4LS2BA-AU fits distributed sensor nodes that need more control capability than an 8-bit MCU while keeping on-board program storage compact. Its 32-bit Cortex-M4 core operates at up to 48 MHz, and its 128 KB flash plus 32 KB SRAM provide space for sampling logic, filtering, communications, and configuration handling. The industrial -40 °C to +85 °C rating supports controlled indoor and industrial environments. In a sensor gateway, the device can collect measurements, apply local filtering, validate status, and forward information through a serial interface. The 64-pin TQFP also provides more routing options than a very small leadless package, although exposed-pad thermal management and decoupling must follow the manufacturer layout guidance.
Recommandé
Building Automation Equipment
The ATSAM4LS2BA-AU is appropriate for building-control modules that coordinate sensors, digital outputs, and communication interfaces. A 48 MHz Cortex-M4 core can execute protocol handling and control logic while the 128 KB flash stores application code and the 32 KB SRAM accommodates packet buffers and working state. The 64-pin TQFP provides a practical mix of general-purpose I/O and peripheral routing for controller boards. In a room-control unit, the MCU could process occupancy and temperature inputs, manage actuator commands, maintain operating states, and supervise communications. Its industrial temperature grade and cryptographic capability are useful attributes for connected building equipment, while the final product must still verify electrical margins, isolation needs, and regulatory requirements.
Recommandé
Compact Data-Acquisition Systems
The ATSAM4LS2BA-AU can serve as the control and processing MCU in a compact data-acquisition system requiring deterministic sampling coordination and local data handling. Its 48 MHz 32-bit Cortex-M4 core supports efficient peripheral scheduling, while 128 KB flash and 32 KB SRAM accommodate acquisition firmware, calibration tables, and temporary sample buffers. In a multi-channel measurement device, the MCU could configure an external converter, timestamp events, run basic filtering, and transfer results through a high-speed serial interface. The 64-pin TQFP gives designers a broad pin budget for converters, sensors, debug access, and communications. Board-level validation should confirm converter timing, input impedance, analog noise coupling, and exposed-pad thermal performance under sustained acquisition activity.
Recommandé
Communications Equipment
The ATSAM4LS2BA-AU is suitable for compact communications equipment that requires a general-purpose MCU for framing, control, diagnostics, and protocol management. Its 48 MHz Cortex-M4 core offers more processing headroom than basic 8-bit devices, and the 128 KB flash plus 32 KB SRAM can hold firmware and transmit or receive buffers. In a protocol-conversion or remote-interface module, the device could manage a serial link, maintain link state, process commands, and report faults through another interface. The 64-pin TQFP accommodates communications signals, control outputs, programming access, and supporting components. Designers should assess the selected transceiver’s timing requirements, antenna or line-driver characteristics, thermal rise at continuous activity, and whether cryptographic functions are needed for the equipment’s security model.
Recommandé
Process and Motor-Control Modules
The ATSAM4LS2BA-AU can serve in small process-control or motor-control modules where deterministic firmware execution, multiple I/O functions, and local diagnostics are needed. The 32-bit Cortex-M4 core runs at up to 48 MHz, providing dedicated processing for control loops, state machines, fault handling, and communication tasks. Its 128 KB flash supports control code and parameter sets, while 32 KB SRAM accommodates command queues and status variables. A compact controller could decode inputs, operate outputs, monitor sensors, and coordinate a communication link. The 64-pin TQFP offers sufficient routing flexibility for control signals and timing-sensitive peripherals. Final qualification should evaluate control-loop bandwidth, output-driver topology, isolation, transient immunity, grounding, and thermal performance under the highest expected switching duty cycle.
Recommandé
Battery-Operated Embedded Products
The ATSAM4LS2BA-AU supports compact battery-operated products that need local processing without adopting a higher-frequency processor class. Its Cortex-M4 architecture provides 32-bit execution at up to 48 MHz, allowing efficient peripheral coordination and responsive event handling, while 128 KB of flash eliminates the need for external program storage in many designs. In a portable condition-monitoring product, the MCU could manage sensor duty cycles, interpret local events, maintain a status log, and communicate intermittently with a host. The 64-pin TQFP offers adequate I/O and peripheral connectivity in a square surface-mount footprint. Power optimization still depends on the selected clock scheme, peripheral activity, firmware execution profile, and regulator efficiency, so current measurements should be performed in the final board configuration.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAM4LS2BA-AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAM4LS4BA-AU | ATSAM4LS8BA-AU | ATSAM4LS16BA-AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP | 64-pin TQFP | 64-pin TQFP | 64-pin TQFP |
| Processor Core | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 |
| Maximum Operating Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 128 KB | 256 KB | 512 KB | 1 MB |
| Core Width | 32-bit | 32-bit | 32-bit | 32-bit |
Principaux différenciateurs
- Uses the lowest flash capacity among the listed compatible SAM4L choices (vs ATSAM4LS4BA-AU)
- Maintains a 48 MHz Cortex-M4 operating class with the same 64-pin package (vs ATSAM4LS8BA-AU)
- Combines industrial temperature grading with cryptographic capability (vs ATSAM4LS16BA-AU)
- Avoids the 120 MHz performance class of the SAM4S2B family (vs ATSAM4S2BA-AU)
Notes de conception
Treat the exposed pad as both a package feature and a required thermal path. Connect it to the designated ground plane with the manufacturer’s recommended via array, maintain the specified solder-mask definition, and avoid placing thermally isolated copper voids beneath the pad. Estimated: sustained processor dissipation depends on clock rate, active peripherals, supply voltage, and ambient temperature, so measure the assembled board at the highest expected workload rather than relying on an unverified junction-temperature estimate.
Place every supply bypass capacitor directly beside its associated power and ground pins, using the shortest current-loop path possible. Follow the manufacturer’s recommended capacitance, voltage rating, and dielectric guidance when the datasheet specifies it. Avoid routing high-current digital or switching-node copper through the quiet analog or clock areas. The 64-pin TQFP footprint requires careful escape routing, so confirm pad geometry, pin numbering direction, exposed-pad dimensions, and solder profile against the approved package drawing before fabrication.
Preserve the exact ATSAM4LS2BA-AU pin assignments and do not repurpose a pin unless the manufacturer explicitly confirms that the alternate function and analog specifications are suitable. Keep clock lines short, isolate them from high-current switching paths, and use a continuous reference plane where signal return paths require it. Verify debug and programming access in the schematic and layout so production programming, field updates, and failure analysis remain practical without moving or modifying the MCU.
Do not substitute a same-package MCU solely because the pin count and core frequency appear similar. Validate the complete peripheral set, interrupt mapping, timer channels, communication instances, memory organization, clock tree, boot options, cryptographic resources, and software-library support. For firmware reuse, rebuild and test against the replacement’s memory map and linker configuration. The three listed same-family alternatives provide more flash, so code placement and startup assumptions can change even when the PCB package remains compatible.
Informations de conformité
The product is identified as green and industrial-temperature, but formal RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations are not stated. Confirm each status with Microchip before regulatory use.
