ATSAM4S4CA-AU - 120MHz Cortex-M4 256KB Flash MCU | Microchip
MPN： ATSAM4S4CA-AU ✓ 啟用中ATSAM4S4CA-AU 概覽
A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single die, forming the lowest level of the embedded computing hierarchy: semiconductor -> integrated circuit -> embedded processor -> microcontroller. The SAM4S family belongs to Microchip's ARM-based SAM portfolio, which targets general-purpose embedded control where a balance of performance, integration, and power efficiency is required.
Key features include the Cortex-M4 core with hardware floating-point unit, operating from a 1.62 V to 3.6 V single supply, and power consumption of approximately 180 uA/MHz per the Microchip ATSAM4S4C product page. The 256 KB Flash supports in-application programming, and the 64 KB SRAM provides headroom for real-time control loops, communication buffers, and small RTOS kernels.
Architecturally, the device combines the Cortex-M4 pipeline with a multi-layer bus matrix, DMA channels, and a rich peripheral set typical of the SAM4S family, including USART, SPI, TWI (I2C), and PWM resources. Flash accelerator logic keeps the core fed at the full 120 MHz clock rate, minimizing wait-state penalties in deterministic control applications.
Typical applications include industrial control and automation nodes, consumer appliance interfaces, embedded networking and gateways, test and measurement instruments, and portable battery-powered devices where the 180 uA/MHz consumption extends battery life.
When designing with this device, plan power budgeting around the 1.62 V to 3.6 V supply window and use appropriate decoupling on the VDDIO and VDDCORE domains; also verify that the industrial temperature grade (typically -40C to +85C) matches your end environment.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond the raw datasheet, giving engineers a single citable source for the ATSAM4S4CA-AU.
直接替換替代品，適用於 ATSAM4S4CA-AU — 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： ATSAM4S4CA-AU （相同外形與佔位） — 差異在於 RoHS Status, Package, Core Processor, SRAM, Connectivity.
ATSAM4S2CA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S8CA-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4N8CA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S4CA-CU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S4CA-AU 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4 (SAM4S) |
| Core Size | 32-Bit Single-Core |
| 最大時脈頻率 | 120 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Power Consumption | 180 uA/MHz |
| 封裝 | 100-LQFP (14 x 14 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| RoHS 狀態 | RoHS3 Compliant |
| Lead Free Status | Lead Free |
| Packaging Option | GREEN, IND TEMP, MRL A (per FindIC listing) |
ATSAM4S4CA-AU 100-lqfp (14 x 14 mm) 腳位配置指南
ATSAM4S4CA-AU（100-lqfp (14 x 14 mm) 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： ATSAM4S4CA-AU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4S4CA-AU 適用於 6 應用s: Industrial Control and Automation, Embedded Networking and IoT Gateways, Consumer Appliance Control, Battery-Powered Portable Instruments, Test and Measurement Equipment, Security and Access Control Panels.
Industrial Control and Automation
The ATSAM4S4CA-AU fits factory automation nodes, PLC auxiliary controllers, and motor drive interfaces because its 120 MHz Cortex-M4 core with hardware FPU executes PID loops and basic signal processing deterministically while the 256 KB Flash holds protocol stacks and diagnostics. In a typical node the MCU reads sensors over TWI or SPI, drives PWM outputs for actuators, and reports over USART/RS-485, using DMA to keep CPU load low at full clock speed. Operating from a 3.3 V rail at roughly 180 uA/MHz also simplifies thermal design in sealed industrial enclosures. The industrial temperature grade of approximately -40C to +85C supports cabinet and machine-mounted installations without additional cooling.
推薦
Embedded Networking and IoT Gateways
For smart nodes and edge gateways, the ATSAM4S4CA-AU provides the 256 KB Flash needed for TCP/IP or CANopen stacks plus the 64 KB SRAM for socket buffers, while the 120 MHz Cortex-M4 leaves ample headroom for packet parsing and light TLS pre-processing. USART and TWI peripherals connect to Wi-Fi, LoRa, or Ethernet companion modules, and DMA offloads serial traffic so the core can focus on application logic. Power consumption of about 180 uA/MHz from a 1.62 V to 3.6 V supply suits mains-backed but energy-conscious nodes. Pin compatibility with ATSAM4S8CA-AU and ATSAM4S16CA-AU allows a Flash upgrade on the same PCB as stack requirements grow.
推薦
Consumer Appliance Control
Appliance main boards - dishwashers, air conditioners, coffee machines - need a single MCU that drives user interfaces, motor control, and safety monitoring simultaneously. The ATSAM4S4CA-AU's 100-pin LQFP exposes enough I/O for a segmented LCD or matrix keypad, multiple PWM channels for blower and pump motors, and ADC inputs for NTC temperature sensing, while the Cortex-M4 FPU accelerates sensor linearization math. The 256 KB Flash accommodates multi-language UI code and OTA-style firmware update bootloaders. Its GREEN industrial-grade packaging and RoHS3 compliance align with consumer appliance environmental requirements, and single-supply 3.3 V operation keeps the power tree simple.
推薦
Battery-Powered Portable Instruments
Handheld meters, dataloggers, and portable diagnostic tools benefit from the ATSAM4S4CA-AU's efficiency profile: approximately 180 uA/MHz active consumption and low-power sleep modes from the 1.62 V to 3.6 V supply directly extend battery runtime. The 120 MHz core processes FFT-based measurements quickly so the device can return to sleep, and the 64 KB SRAM buffers measurement sweeps between data transfers. USB or USART connectivity handles data offload to PCs. Designers should place the MCU in its lowest-power wait mode between samples and clock peripherals from DMA-driven transfers to minimize wakeups - a pattern well documented in Microchip's SAM4S low-power application notes.
推薦
Test and Measurement Equipment
Bench instruments, sensor conditioners, and calibration fixtures use the ATSAM4S4CA-AU to sequence acquisitions, compute corrections, and communicate results over USART or USB. The Cortex-M4 DSP extensions accelerate windowed FFT and filtering on sampled data, while the 256 KB Flash stores calibration tables, firmware, and UI assets without external memory. Multiple timers and PWM channels generate stimulus signals and precisely timed trigger outputs. Because the SAM4S family is pin-to-pin compatible with SAM3S and SAM4N devices, instrument platforms can scale memory or trade the FPU across product tiers on one PCB, amortizing layout and certification work across variants.
推薦
Security and Access Control Panels
Door controllers, alarm panels, and card-reader interfaces are a strong fit for the ATSAM4S4CA-AU: the 100-pin LQFP supplies the I/O count for relays, tamper switches, Wiegand readers, and keypads, while the 120 MHz Cortex-M4 verifies credentials and runs the panel state machine with margin. The 256 KB Flash hosts event logs, firmware-with-bootloader schemes for field updates, and encryption routines; 64 KB SRAM buffers transaction history. Supply tolerance of 1.62 V to 3.6 V rides through marginal wall-adapter conditions, and the industrial temperature grade suits unheated entry enclosures. Design the tamper and power supervisory inputs with debounce in firmware for reliable security behavior.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4S4CA-AU — 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 | ATSAM4S2CA-AU | ATSAM4S16CA-AU | ATSAM4S8CA-AU | ATSAM4N8CA-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-LQFP (14 x 14 mm) | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same |
| Core | ARM Cortex-M4 (with FPU) | ARM Cortex-M4 (with FPU) | ARM Cortex-M4 (with FPU) | ARM Cortex-M4 (with FPU) | ARM Cortex-M4 (no FPU) |
| Flash Memory | 256 KB | 128 KB | 1 MB | 512 KB | 512 KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
主要差異化特點
- Cortex-M4 with hardware FPU at 120 MHz (對比ATSAM4N8CA-AU)
- Balanced 256 KB Flash / 64 KB SRAM memory point (對比ATSAM4S2CA-AU)
- Lower memory cost ceiling vs larger variants (對比ATSAM4S16CA-AU)
設計說明
The ATSAM4S4CA-AU operates from a 1.62 V to 3.6 V single supply with core current roughly 180 uA/MHz (about 21.6 mA at 120 MHz before I/O loads). Decouple each VDDIO and VDDCORE domain with 100 nF ceramics placed within 2 mm of the pins, plus 10 uF bulk at the board entry. Estimated: at 3.3 V and 25 mA average, device power is about 82 mW, which is thermally trivial for the LQFP-100 - the supply rail regulation and sequencing, not heat, is the design focus.
For the 100-LQFP (0.5 mm pitch) footprint, follow IPC-recommended land patterns and route the analog supply domain separately from switching loads. Keep crystal oscillator traces short and guard them with ground. Use a solid ground plane on layer 2 and return all peripheral grounds through vias near the decoupling caps. Expose and tie the die-attach paddle region per Microchip's LQFP layout guidance to improve signal integrity, though the LQFP-100 has no exposed pad.
The most common SAM4S migration mistake is assuming register-level identity with SAM3S/SAM7S: although pin-to-pin compatible per the family datasheet, peripheral clocks, PMC configuration, and Flash wait-state settings differ on Cortex-M4. Always re-run the clock tree configuration for 120 MHz operation and verify Flash accelerator settings. Also confirm the industrial temperature range of -40C to +85C against your enclosure environment, and reserve Flash margin below 256 KB for a field-update bootloader.
合規資訊
Listed as RoHS3 / Lead Free per ics-100.com distributor listing; Mouser describes the part as LQFP GREEN IND TEMP (GREEN = halogen-free packaging). REACH and conflict-minerals declarations not found in provided data.
