ATSAM4S4CA-AU - 120MHz Cortex-M4 256KB Flash MCU | Microchip
料号： ATSAM4S4CA-AU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.21 | $5.21 |
| 10 | $4.95 | $49.50 |
| 25 | $4.72 | $118.00 |
| 100 | $4.27 | $427.00 |
| 500 | $4.05 | $2,025.00 |
| 1,000 | $3.85 | $3,850.00 |
ATSAM4S4CA-AU 概述
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.
直接替换替代料： ATSAM4S4CA-AU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAM4S4CA-AU （相同外形与封装尺寸） ——差异在于 RoHS Status, Package, Core Processor, SRAM, Connectivity.
快速对比工具——选择替代料号进行并排对比：
ATSAM4S2CA-AU
✅ 直接替换✓ 有现货
$3.14 / 个
查看数据手册 →ATSAM4S16CA-AU
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →ATSAM4S8CA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.74 / 个
查看数据手册 →ATSAM4N8CA-AU
✅ 直接替换✓ 有现货
$3.83 / 个
查看数据手册 →ATSAM4S4CA-CU
✅ 直接替换✓ 有现货
$3.45 / 个
查看数据手册 →ATSAM4S4CA-AU 最大额定值与电气特性
| Core Processor | ARM Cortex-M4 (SAM4S) |
| Core Size | 32-Bit Single-Core |
| 最大时钟频率 | 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 |
| 封装 | 100-LQFP (14 x 14 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| RoHS 状态 | 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) 引脚配置指南
ATSAM4S4CA-AU（100-lqfp (14 x 14 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATSAM4S4CA-AU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM4S4CA-AU 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ATSAM4S4CA-AU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Cortex-M4 with hardware FPU at 120 MHz （对比 ATSAM4N8CA-AU)
- Balanced 256 KB Flash / 64 KB SRAM memory point （对比 ATSAM4S2CA-AU)
- Lower memory cost ceiling vs larger variants （对比 ATSAM4S16CA-AU)
设计说明
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.
合规信息
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.
