ATSAM4S4BA-UUR - 120MHz Cortex-M4 MCU 256KB Flash WLCSP-64
MPN： ATSAM4S4BA-UUR ✓ 啟用中ATSAM4S4BA-UUR 概覽
A microcontroller (MCU) is a single-chip integrated circuit combining a processor core, memory, and peripherals to form a complete embedded control system. Within the MCU hierarchy, the SAM4S family sits in the general-purpose 32-bit flash MCU class, and belongs to the ARM Cortex-M architecture lineage: Cortex-M4 -> ARMv7E-M -> 32-bit RISC microcontroller -> system-on-chip.
Key features include the Cortex-M4 core with hardware DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU), dual-bank Flash enabling safe in-application programming, and a supply range of 1.62V to 3.6V (nominal 1.2V/3.3V system operation). The WLCSPGREEN package is RoHS-green, making the device well suited to extreme miniaturization where board area is the dominant constraint.
Technically, the ATSAM4S4BA-UUR integrates a 12-bit ADC, UART, SPI and TWI serial interfaces typical of the SAM4S family, and benefits from Microchip's peripheral set including DMA channels for low CPU-load data movement. Pin-to-pin compatibility across the SAM4S series (and with SAM4N, SAM3S, SAM3N, SAM7S in 64-pin versions) allows flash-size migration without PCB redesign.
Typical applications include compact portable and battery-powered devices, IoT sensor nodes, industrial control modules, and consumer electronics where a small 64-ball wafer-level footprint at up to 120 MHz is required.
A key design consideration: the WLCSP package exposes balls on a ~0.4-0.5 mm pitch; rework requires experienced assembly and the PCB must follow Microchip's ball-mapping layout guidelines. Confirm exact ball pitch and outline in the manufacturer datasheet before layout.
This page synthesizes verified distributor data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATSAM4S4BA-UUR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAM4S4BA-UUR （相同外形與佔位） — 差異在於 Package, Memory Protection Unit, Instruction Set, SRAM, Core Size.
ATSAM4S16BA-UUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4S2BB-UUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4S4BA-UUR 最大額定值與電氣特性
| Core | ARM Cortex-M4 |
| Core Size | 32-bit |
| 最大時脈頻率 | 120 MHz |
| Flash Memory Size | 256 KB |
| SRAM Size | 64 KB |
| Instruction Set | Thumb-2 with DSP instructions |
| Memory Protection | MPU (Memory Protection Unit) |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Operating Voltage Class | 1.2 V / 3.3 V |
| Flash Features | Dual-bank, ECC, Security Bit, Lock Bits |
| 封裝 | WLCSP-64 (64-UFBGA / WLCSPGREEN) |
| Number of Terminals | 64 balls |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| Temperature Grade | Industrial |
| Packaging | Tape & Reel (T/R) |
| Series | SAM4S |
ATSAM4S4BA-UUR wlcsp-64 (64-ufbga / wlcspgreen) 腳位配置指南
ATSAM4S4BA-UUR（wlcsp-64 (64-ufbga / wlcspgreen) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATSAM4S4BA-UUR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4S4BA-UUR 適用於 6 應用s: Portable and Wearable Devices, IoT Sensor Nodes, Industrial Control Modules, Consumer Electronics, Motor Control and Digital Power, Data Logging and Security Devices.
Portable and Wearable Devices
The ATSAM4S4BA-UUR's 64-ball WLCSP is a wafer-level chip-scale package whose footprint approaches the die size itself, making it one of the most space-efficient ways to deploy a 120 MHz Cortex-M4 with 256 KB Flash and 64 KB SRAM. In wearables and portable instruments where every square millimeter of PCB matters, this part integrates compute, memory, and rich peripherals without a larger QFP footprint. Its 1.62V to 3.6V supply range allows direct operation from a Li-ion cell through an LDO, and the SAM4S family's low-power modes stretch battery life. Designers should budget for WLCSP assembly capability, as ball-level rework is not field-serviceable.
推薦
IoT Sensor Nodes
IoT nodes need local signal processing, multiple serial interfaces, and compact packaging - the ATSAM4S4BA-UUR delivers all three. The Cortex-M4 core at 120 MHz with DSP instructions handles filtering, FFT-based sensor analytics, and protocol stacks, while 256 KB Flash with dual-bank organization supports secure over-the-air firmware updates with a fallback bank. ECC on Flash improves data retention reliability in always-on nodes. Multiple UART/SPI/TWI-class peripherals connect radios and sensors with DMA offloading the CPU. The industrial -40C to +85C rating suits outdoor enclosures. Use the WLCSP-64 footprint with an RF module placed nearby to keep the antenna feed clean.
推薦
Industrial Control Modules
In industrial automation, the ATSAM4S4BA-UUR provides a 120 MHz Cortex-M4 with MPU (Memory Protection Unit) for robust firmware partitioning, and Flash ECC plus Security Bit and Lock Bits for code protection on fielded equipment. The industrial -40C to +85C temperature grade and 1.62V-3.6V supply tolerance accommodate noisy 24V-system environments after a standard buck or LDO front end. Its WLCSP-64 footprint suits dense DIN-rail and sensor-head modules where conventional 64-pin QFPs are too large. Designers should verify creepage/clearance around the fine-pitch balls against their insulation standards and use conformal coating in harsh atmospheres.
推薦
Consumer Electronics
Consumer products such as small appliances, toys, personal care devices, and accessories benefit from the ATSAM4S4BA-UUR's combination of high clock speed (120 MHz), adequate memory (256 KB Flash / 64 KB SRAM), and an ultra-small green WLCSP package that reduces PCB cost in high-volume builds. The WLCSPGREEN designation supports lead-free, halogen-restricted manufacturing required by major consumer brands. Because consumer BOMs are cost-sensitive, the pin-compatible ATSAM4S2BB-UUR offers a downward migration path when firmware fits in 128 KB, while ATSAM4S16BA-UUR accommodates feature growth - all on the same PCB footprint, protecting tooling investment.
推薦
Motor Control and Digital Power
The Cortex-M4's hardware DSP instructions (single-cycle MAC, saturating arithmetic) make the ATSAM4S4BA-UUR effective for field-oriented control and digital power loops at 120 MHz. The MPU separates the control ISR domain from communication firmware, improving fault containment in motor drives. SAM4S peripherals with DMA handle PWM-adjacent ADC sampling with low jitter. The 1.62V-3.6V digital supply is isolated from gate-driver supplies by standard level-shifting isolation. Note the core lacks the optional Cortex-M4 FPU, so use Microchip's fixed-point motor-control libraries for the highest loop rates in the WLCSP-64 footprint.
推薦
Data Logging and Security Devices
Security-critical and tamper-aware logging devices benefit from the ATSAM4S4BA-UUR's Flash Security Bit and Lock Bits, which prevent external readout of proprietary firmware, and ECC-protected Flash that guards against bit corruption in long-deployment recorders. The 120 MHz Cortex-M4 performs real-time encryption and compression on 64 KB of SRAM working data, while dual-bank Flash enables authenticated, rollback-capable field updates. The WLCSP-64 package supports conformally sealed, miniature enclosures typical of asset trackers and secure loggers rated -40C to +85C. Validate the Security Bit behavior against your threat model using Microchip's SAM4S documentation.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4S4BA-UUR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAM4S16BA-UUR | ATSAM4S2BB-UUR |
|---|---|---|---|
| Package | WLCSP-64 | WLCSP-64 - same | WLCSP-64 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Clock | ARM Cortex-M4 / 120 MHz | ARM Cortex-M4 / 120 MHz | ARM Cortex-M4 / 120 MHz |
| Flash Memory | 256 KB | 1024 KB | 128 KB |
| Supply Voltage | 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 |
| Dual-bank Flash / ECC | Yes | Yes | Yes |
主要差異化特點
- Balanced 256 KB Flash / 64 KB SRAM density (對比ATSAM4S2BB-UUR)
- Lower cost than max-density variant (對比ATSAM4S16BA-UUR)
- Flash ECC and Security Bit (對比Competing Cortex-M4 MCUs)
設計說明
The WLCSP-64 uses sub-0.5 mm ball pitch; route breakout with via-in-pad or microvias and follow Microchip's ball-map fan-out guidance in the SAM4S datasheet 60001419B. Keep decoupling capacitors on the opposite side directly under the die, one 100 nF per supply ball plus one bulk capacitor. Specify NSMD pads and follow the solder-mask opening recommendations to ensure reliable ball collapse during reflow.
Supply the device from a 3.3V rail within the 1.62V-3.6V datasheet range. Estimated: at moderate active current draw, a linear regulator dropping 5V to 3.3V at 50 mA dissipates about 85 mW - acceptable, but for battery designs prefer a buck converter to extend runtime. Verify VDDCORE/VDDIO sequencing requirements and use the enable-controlled regulator outputs recommended in the SAM4S datasheet power-supply section.
WLCSP packages cannot be hand-soldered or field-reworked. Always validate firmware on a QFP sibling such as ATSAM4S4AB-AN before committing to the WLCSP-64 assembly, since the SAM4S family is pin-to-pin and code-compatible. Also confirm the exact SAM4S4B peripheral allocation for the -UUR ball map; do not assume QFP pin functions map 1:1 to WLCSP balls without checking the datasheet ball-out table.
合規資訊
Package is designated WLCSPGREEN per Mouser, indicating green/RoHS-compliant lead-free wafer-level packaging. Formal REACH and conflict-minerals statements not present in provided data.
