ATSAM4S8BA-MU - 120MHz Cortex-M4 MCU 512KB Flash 64-QFN | Microchip
料号： ATSAM4S8BA-MU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.42 | $9.42 |
| 10 | $8.58 | $85.80 |
| 100 | $7.31 | $731.00 |
| 500 | $6.48 | $3,240.00 |
| 1,000 | $5.79 | $5,790.00 |
ATSAM4S8BA-MU 概述
What is a Cortex-M4 microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and peripherals. The Cortex-M4 is an ARM processor core that adds DSP instructions and a single-precision floating-point unit (FPU), making it suitable for signal-processing tasks while maintaining the low-power and deterministic interrupt behaviour of the Cortex-M family. Within the broader taxonomy, the ATSAM4S8BA-MU belongs to the SAM4S series, which sits in Microchip's SMART ARM-based Flash MCU family, bridging industrial control and connected-embedded applications.
Key features of the ATSAM4S8BA-MU include up to 120 MHz core speed with DSP extensions, 512 KB Flash, 128 KB SRAM, an MPU for OS-level memory isolation, and pin-to-pin compatibility with SAM3N, SAM3S, and SAM7S legacy devices in the 64-pin and 100-pin variants. The device supports up to 47 I/O lines, multiple communication peripherals (USART, SPI, TWI, USB 2.0 Full-Speed), and analog blocks including a 12-bit ADC and a 12-bit DAC.
From an architectural perspective, the SAM4S uses a Harvard bus architecture with separate instruction and data paths, enabling zero-wait-state Flash execution up to 120 MHz when configured with the on-chip cache. The integrated voltage regulator with on-chip decoupling reduces external BOM, while the brown-out detector and watchdog timer improve field reliability in industrial environments.
Typical applications include industrial control panels, smart metering, point-of-sale terminals, consumer white goods, USB peripherals, and motor-control subsystems. The combination of Cortex-M4 DSP performance, generous SRAM, and a wide operating voltage range also suits low-power connected sensor hubs. According to Microchip, the SAM4S family is designed for scalable performance and memory density with low active and standby power.
When designing with this MCU, ensure that decoupling capacitors are placed close to the VDDCORE and VDDIO pins, and that the NRST reset circuit meets the minimum pulse-width specification. Developers using Atmel Studio 7 / Microchip Studio and the ASF / Harmony framework will benefit from existing peripheral drivers for the SAM4S platform.
This page synthesises distributor pricing, drop-in alternatives, pin-compatibility notes, and practical design guidance not found in the standalone manufacturer datasheet.
直接替换替代料： ATSAM4S8BA-MU ——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： ATSAM4S8BA-MU （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, Core Architecture, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
ATSAM4S16BA-MU
✅ 直接替换✓ 有现货
$5.15 / 个
查看数据手册 →ATSAM4S4BA-MU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAM4S8BA-MUR
✅ 直接替换📋 参考替代料（不在目录中）
ATSAM4S8BA-MU 最大额定值与电气特性
| Core Architecture | ARM Cortex-M4 with FPU and DSP |
| Maximum Clock Speed | 120 MHz |
| Instruction Cache | 2 KB |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Supply Voltage (VDDIO/VDDCORE) | 1.62 V to 3.6 V |
| Active Power Consumption | 200 uA/MHz (typ, all peripherals enabled) |
| Memory Protection Unit (MPU) | Yes |
| Instruction Set | Thumb-2, DSP extensions |
| Number of I/O Lines | Up to 47 |
| 封装 | 64-pin QFN (9x9 mm) |
| 工作温度 | -40C to +85C (Industrial) |
| 安装类型 | Surface Mount |
| 生命周期状态 | Active |
| RoHS 状态 | Compliant |
ATSAM4S8BA-MU 64-pin qfn (9x9 mm) 引脚配置指南
ATSAM4S8BA-MU（64-pin qfn (9x9 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： ATSAM4S8BA-MU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM4S8BA-MU 适用于 6 应用s: Industrial Control Panels, Smart Metering and Energy Monitoring, USB Peripherals and HID Devices, Point-of-Sale (POS) Terminals, Motor Control and BLDC Drivers, Connected Sensor Hubs and IoT Gateways.
Industrial Control Panels
The ATSAM4S8BA-MU suits industrial control panels where its 120 MHz Cortex-M4 core delivers fast deterministic loop execution for PID control and HMI updates. The 512 KB Flash accommodates full Modbus/TCP, FreeRTOS, and custom GUI stacks, while 128 KB SRAM supports Ethernet buffers and large lookup tables. The 1.62 V to 3.6 V supply range tolerates 24 V industrial rails after a buck regulator, and the -40C to +85C industrial temperature grade ensures reliable operation on factory floors. Built-in DSP extensions accelerate filtering of analog sensor inputs and motor-control maths.
推荐
Smart Metering and Energy Monitoring
For smart electricity, gas, and water meters, the ATSAM4S8BA-MU's Cortex-M4 DSP engine performs real-time power-quality calculations including RMS, THD, and harmonic analysis up to the 31st harmonic. The 12-bit ADC integrated in the SAM4S family supports simultaneous voltage and current sampling at rates suitable for class-1 metering accuracy. The 200 uA/MHz active current keeps total power consumption below 30 mW at full load, helping meet stringent meter battery-life targets. AES hardware in the SAM4S also secures OTA firmware updates over wireless M-Bus or NB-IoT links.
推荐
USB Peripherals and HID Devices
The ATSAM4S8BA-MU integrates a USB 2.0 Full-Speed device controller with on-chip PHY, eliminating the need for external transceivers in HID, CDC, and custom-class peripherals. The 120 MHz Cortex-M4 plus DSP engine handles bulk USB transfers with minimal CPU overhead, leaving headroom for application processing. Designers benefit from the SAM4S USB device stack in ASF/Harmony, plus 512 KB Flash for composite USB device firmware. The 64-QFN's small footprint is ideal for compact dongles and POS accessories.
推荐
Point-of-Sale (POS) Terminals
POS terminals benefit from the ATSAM4S8BA-MU's combination of Cortex-M4 DSP performance, 128 KB SRAM, and USB Full-Speed controller for magstripe, EMV, and printer interfaces. The wide 1.62 V to 3.6 V supply allows direct operation from a single Li-ion cell with buck-boost regulation, while the industrial temperature grade supports kitchen and outdoor kiosk environments. Built-in crypto accelerators (AES, TRNG) and Secure Boot from SAM4S firmware protect cardholder data per PCI PTS requirements.
推荐
Motor Control and BLDC Drivers
The Cortex-M4 core with FPU and DSP instructions in the ATSAM4S8BA-MU executes field-oriented control (FOC) algorithms for BLDC and PMSM motors with deterministic loop times well under 10 microseconds at 120 MHz. The integrated 12-bit ADC provides fast current-sense sampling required for sensorless control schemes, and PWM outputs from the SAM4S timer/counter blocks drive 3-phase inverter bridges. The 512 KB Flash accommodates complex control state machines and parameter-tuning UI.
推荐
Connected Sensor Hubs and IoT Gateways
In IoT sensor hubs, the ATSAM4S8BA-MU aggregates data from I2C/SPI sensors, performs on-device DSP filtering (FFT, Kalman), and forwards results over Wi-Fi, BLE, or NB-IoT modules. The 128 KB SRAM accommodates TLS handshake buffers and packet reassembly, while the 512 KB Flash holds multiple sensor drivers and OTA bootloader slots. The 200 uA/MHz active current extends battery life in solar-powered edge nodes.
推荐
推荐产品汇总
工程参考数据： ATSAM4S8BA-MU ——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 | ATSAM4S16BA-MU | ATSAM4S4BA-MU | ATSAM4S8BA-MUR | ATSAM4S8CA-MU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 100-LQFP (14x14 mm) - different footprint |
| Core | ARM Cortex-M4 + FPU + DSP | ARM Cortex-M4 + FPU + DSP | ARM Cortex-M4 + FPU + DSP | ARM Cortex-M4 + FPU + DSP | ARM Cortex-M4 + FPU + DSP |
| Maximum Clock Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 512 KB | 1 MB (+100%) | 256 KB (-50%) | 512 KB (same) | 512 KB (same) |
| SRAM | 128 KB | 128 KB | 128 KB | 128 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 | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Packaging Format | Tray | Tray | Tray | Tape & Reel | Tray |
| Pin-to-Pin Compatible | Yes (with SAM3N/SAM3S/SAM7S 64-pin) | Yes | Yes | Yes | Different footprint (100-pin) |
关键差异点
- Upgrades Flash to 1 MB without changing footprint （对比 ATSAM4S4BA-MU)
- Cortex-M4 DSP/FPU vs legacy Cortex-M3 （对比 ATSAM3S8BA-MU)
- Pin-to-pin compatible with SAM3S, SAM3N, and SAM7S 64-pin variants （对比 Other Cortex-M4 MCUs (STM32, LPC))
设计说明
Place a 100 nF X7R decoupling capacitor within 2 mm of each VDDCORE pin and a 4.7 uF bulk capacitor near the main VDDIO pin. The SAM4S internal 1.2 V regulator supplies VDDCORE from VDDIO; according to the SAM4S datasheet, the bulk capacitor on VDDCORE must be at least 4.7 uF with ESR below 0.5 ohm to maintain regulation during core load transients. Use a star-ground topology with the GND paddle of the QFN tied directly to a continuous ground plane.
Do not skip the NRST reset network. The SAM4S requires a minimum 10 ns pulse on NRST for a clean cold-start, and floating NRST can cause latch-up at power-up. Use the recommended 10 kohm pull-up with a 10 nF capacitor to ground, or an external reset supervisor for noisy industrial environments. Per the SAM4S datasheet, leaving NRST floating violates the application's operating conditions.
The 64-QFN exposed thermal pad (EP) must be soldered to the PCB ground plane for both electrical grounding and thermal dissipation. Per IPC-7351 land-pattern guidelines for 9x9 mm QFN with 0.5 mm pitch, design the land pattern with a 1:1 pad-to-pitch ratio and add thermal vias in a 3x3 array under the EP. The thermal via pattern should use 0.3 mm drilled vias with 0.6 mm pads for optimal solder wicking.
合规信息
RoHS and lead-free confirmed by Microchip product page and DigiKey listing as of 2026-09-20. AEC-Q100 not applicable for industrial-grade MCUs; no automotive-qualified SAM4S variant exists in this footprint.
