ATSAM4S2AB-AN - ARM Cortex-M4 120MHz MCU 128KB Flash | Microchip
料号： ATSAM4S2AB-AN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.54 | $4.54 |
| 10 | $4.36 | $43.60 |
| 100 | $4.12 | $412.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.72 | $3,720.00 |
ATSAM4S2AB-AN 概述
A microcontroller (MCU) is a single-chip computer integrating a processor core, memory, and peripherals into one package. Within the semiconductor hierarchy, the ATSAM4S2AB-AN sits in the general-purpose 32-bit MCU class, part of the broader ARM Cortex-M embedded processor family used across industrial, consumer, and IoT systems.
Key features include the ARM Cortex-M4 core with hardware DSP instructions for efficient digital signal processing, 128 Kbytes of embedded Flash with ECC (Error Correction Code), Security Bit and Lock Bits for code protection, and 64 Kbytes of SRAM. Peripherals cover I2C, SPI, UART/USART, IrDA, SSC, memory card, and USB connectivity, plus brown-out detect/reset, DMA, PWM, POR, and a watchdog timer. The device provides 34 general-purpose I/O pins.
The Cortex-M4 architecture balances high computational throughput with low interrupt latency, making the SAM4S well suited for motor control and mixed-signal applications that benefit from single-cycle MAC and hardware divide. Flash ECC improves reliability in noisy industrial environments, while the MPU supports functional separation of firmware tasks. A wide operating range supports industrial temperature requirements.
Typical applications include industrial automation controllers, USB-connected sensor and data-acquisition nodes, motor control drives, and embedded IoT gateways. The USB peripheral, rich serial interfaces, and DSP capability make it a strong fit for systems that combine communication, control, and signal processing.
When designing with this device, verify that 128 KB Flash and 64 KB SRAM match your firmware footprint; if code grows beyond this budget, pin-compatible siblings in the SAM4S family provide memory upgrade paths within the same 48-LQFP footprint. Follow Microchip layout guidance for USB signal routing and decoupling.
This page synthesizes verified distributor pricing, drop-in alternatives, design notes, and comparison data not consolidated in the manufacturer datasheet.
直接替换替代料： ATSAM4S2AB-AN ——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： ATSAM4S2AB-AN （相同外形与封装尺寸） ——差异在于 Package, Instruction Set, Operating Temperature, Packaging, Part Status.
快速对比工具——选择替代料号进行并排对比：
ATSAM4S2AB-AUR
✅ 直接替换📋 参考替代料（不在目录中）
ATSAM4S4AB-AN
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.55 / 个
查看数据手册 →ATSAM4S4AA-AN
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.1 / 个
查看数据手册 →ATSAM4S2AA-AN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM4S2AB-ANR
✅ 直接替换✓ 有现货
$3.9 / 个
查看数据手册 →ATSAM4S2AB-AN 最大额定值与电气特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| Maximum Clock Speed | 120 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 64 KB |
| 封装 | 48-LQFP (7x7 mm) |
| Number of I/O | 34 |
| Connectivity | I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Instruction Set | Thumb-2, DSP instructions |
| Memory Protection | MPU (Memory Protection Unit) |
| Flash Features | ECC, Security Bit, Lock Bits |
| Core Supplier | ARM |
| Series | SAM4S |
| 安装类型 | Surface Mount |
ATSAM4S2AB-AN 48-lqfp (7x7 mm) 引脚配置指南
ATSAM4S2AB-AN（48-lqfp (7x7 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： ATSAM4S2AB-AN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM4S2AB-AN 适用于 6 应用s: Industrial Automation Controllers, USB-Connected Data Acquisition, Motor Control Drives, IoT Sensor Nodes and Gateways, Portable and Handheld Instruments, Consumer and Building Control Panels.
Industrial Automation Controllers
The ATSAM4S2AB-AN fits industrial control nodes that need deterministic 120 MHz Cortex-M4 execution with DSP-assisted filtering loops. Its Flash ECC protects program memory against bit errors in electrically noisy factory environments, while the brown-out detector and watchdog timer enforce safe recovery after supply disturbances. The 34 GPIO, PWM outputs, and rich serial set (SPI, I2C, UART, SSC) let one device bridge sensors, actuators, and HMI links. The MPU supports partitioned firmware, and DMA offloads ADC and communication data movement from the core, preserving interrupt latency headroom. For designs needing more code space later, same-footprint SAM4S4x parts provide an in-place Flash upgrade.
推荐
USB-Connected Data Acquisition
The ATSAM4S2AB-AN is well suited to USB sensor and data-acquisition dongles: the integrated USB peripheral handles device-class stacks (CDC, HID, mass storage) while 64 KB SRAM buffers ADC samples for burst transfer. The 120 MHz Cortex-M4 applies DSP instructions (single-cycle MAC) to real-time filtering and calibration math on the stream, and dual DMA channels move data between ADC, SRAM, and USB without core intervention. Flash ECC and Security Bit protect firmware IP in shipped products. Because the 48-LQFP measures only 7x7 mm, the whole DAQ node fits compact enclosures; same-footprint memory upgrades extend sample-buffering capacity without layout change.
推荐
Motor Control Drives
The ATSAM4S2AB-AN addresses low- to mid-power motor control: its 120 MHz Cortex-M4 executes field-oriented control (FOC) loops using DSP multiply-accumulate instructions, while hardware PWM channels drive three-phase inverters with deterministic timing. Flash ECC ensures firmware integrity during voltage transients typical of inverter environments, and the watchdog plus brown-out reset enforce safe shutdown. Multiple UART/USART and SPI ports support encoder, resolver, or serial-encoder feedback. The DMA controller streams ADC current-sense samples without CPU loading, preserving loop determinism. Designs requiring Ethernet or advanced peripherals can migrate to SAM4E parts, while keeping 48-LQFP footprints for compact drive boards.
推荐
IoT Sensor Nodes and Gateways
For IoT nodes, the ATSAM4S2AB-AN combines 128 KB Flash and 64 KB SRAM - enough for a TCP/TLS-style stack or a compact gateway firmware - with USB and multiple UART/SPI/I2C ports for radio modules and sensor busses. The 120 MHz Cortex-M4 performs packet framing, encryption assist, and sensor-fusion math locally, reducing cloud round trips. Flash Lock Bits and the Security Bit protect credentials and firmware in fielded devices. The 7x7 mm 48-LQFP suits compact node PCBs, and the industrial-grade ordering options (Mouser lists IND TEMP) support deployment outside conditioned spaces. Same-footprint SAM4S4x parts offer a Flash growth path as firmware features expand.
推荐
Portable and Handheld Instruments
Handheld instruments benefit from the ATSAM4S2AB-AN's balance of processing power and integration: the 120 MHz Cortex-M4 with DSP instructions handles FFT-based measurement math, while PWM and UART drive display backlights, buzzers, and PC links. USB supports both device connections to a host PC and charging/data paths. The 64 KB SRAM accommodates waveform capture buffers, and Flash ECC maintains calibration-data integrity over years of field use. The 7x7 mm 48-LQFP keeps board area small in pen-style and compact meter form factors. Designers should budget firmware carefully against 128 KB; the same-footprint SAM4S4x variants provide a drop-in upgrade if feature creep occurs.
推荐
Consumer and Building Control Panels
The ATSAM4S2AB-AN suits smart thermostats, access-control panels, and appliance controllers that need USB service ports plus several UART/SPI/I2C links for keypads, displays, and RFID readers. The 34 GPIO directly drive LEDs and relays with modest buffering, and PWM channels support backlight dimming and buzzer tones. The Cortex-M4's headroom runs scheduling, protocol stacks, and OTA-style update logic within 128 KB Flash, with the MPU isolating bootloader from application code. Lock Bits prevent field extraction of proprietary firmware. Mouser's industrial-temperature, green (halogen/RoHS-oriented) listing supports deployment in building equipment environments, and the 48-LQFP enables two-layer cost-optimized PCB layouts.
推荐
推荐产品汇总
工程参考数据： ATSAM4S2AB-AN ——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 | ATSAM4S2AB-AUR | ATSAM4S4AB-AN | ATSAM4S4AA-AN | ATSAM4S2AA-AN | ATSAM4S2AB-ANR |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology (Atmel legacy) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz |
| Flash Memory | 128 KB | 128 KB | 256 KB (2x) | 256 KB (2x) | 128 KB | 128 KB |
| GPIO Count | 34 | 34 | 34 | 34 | 34 | 34 |
| USB Peripheral | Yes | Yes | Yes | Yes | Yes | Yes |
| Packaging Format | Tray | Tape & Reel | Tray | Tray | Tray | Tape & Reel |
关键差异点
- Cost-optimized 128 KB Flash entry point with upgrade path （对比 ATSAM4S4AB-AN)
- Full 64 KB SRAM in this density tier （对比 ATSAM4S2AA-AN)
- Cortex-M4 DSP capability at a 120 MHz price point （对比 ATSAM3S8BA-MUR)
- Flash ECC and Security Bit protection （对比 Generic ARM Cortex-M4 competitors)
设计说明
Decouple all VDD/VDDIO pins of the 48-LQFP with 100 nF ceramic capacitors placed within 2 mm of each supply pin, plus at least one bulk 4.7-10 uF capacitor near the regulator output. The 7x7 mm LQFP has leads on 0.5 mm pitch - use a 0.5 mm pitch land pattern per Microchip/IPC-style LQFP footprint guidance and keep USB D+/D- as a matched-length pair routed over a continuous ground plane. Expose pin-1 marking for AOI inspection. Estimated values for decoupling are typical practice for 120 MHz CMOS MCUs, not datasheet mandates - confirm against the SAM4S datasheet electrical chapter.
Estimate power budget before finalizing the regulator: at 120 MHz, a SAM4S-class core typically draws on the order of tens of mA (exact value in the SAM4S datasheet power chapter - verify before sizing). Add peripheral current (USB transceiver, I/O toggling) and derate the LDO for ambient temperature. Enable the device power-management controller (PMC) clock gating in firmware to cut current in idle states; the watchdog and brown-out detector should remain active even in low-power modes for safety. Size the input supply for USB inrush if bus-powered.
Do not assume the 'AB' SRAM rating when migrating between SAM4S2AA/AB variants - the second letter encodes SRAM size, and mismatched linker scripts will fail silently. Confirm flash lock and Security Bit settings before final programming, since they are irreversible in production. When substituting 48-LQFP SAM4S family members, re-verify the exact pinout in the SAM4S datasheet: package pin mapping is shared but peripheral multiplexing differs across density variants. Also confirm operating temperature class (industrial) matches your enclosure thermal analysis.
合规信息
Mouser lists the package as 'LQFP,GREEN,IND TEMP,MRL B', indicating green (halogen-free/RoHS-oriented) packaging and industrial temperature grade. Full REACH and conflict-minerals status should be confirmed from Microchip's official compliance documents.