ATSAM3X8CA-CU - 84MHz Cortex-M3 MCU, 512KB Flash | Microchip
料号： ATSAM3X8CA-CU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.42 | $12.42 |
| 10 | $11.8 | $118.00 |
| 100 | $10.62 | $1,062.00 |
| 500 | $9.54 | $4,770.00 |
| 1,000 | $8.9 | $8,900.00 |
ATSAM3X8CA-CU 概述
A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, non-volatile program memory, RAM, and a rich set of peripherals onto one die. The SAM3X family sits within Microchip's (formerly Atmel's) 32-bit SAM MCU hierarchy, positioned above the entry-level SAM3N/SAM3S families by adding Ethernet MAC, CAN controllers, and a USB device port for connected embedded systems.
Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Memory Protection Unit (MPU), a 24-bit SysTick timer, and a Nested Vector Interrupt Controller (NVIC). Connectivity spans CAN, Ethernet, I2C (TWI), IrDA, LIN, MMC/SD, SPI, SSC, UART, and USB, making this part a single-chip networking and control hub. The 512KB flash is organized as two 256KB banks supporting dual-bank flash operations.
Technical depth: the Cortex-M3 pipeline is optimized for interrupt-driven control code, with deterministic exception handling suited to industrial communication stacks such as CANopen and EtherCAT-adjacent protocols. The two-bank flash architecture allows firmware management schemes, while the MPU supports RTOS-based designs requiring memory isolation between tasks.
Typical applications include industrial automation and control nodes, embedded Ethernet/CAN gateways, and USB-connected instrumentation. Notably, this MCU family powers the Arduino Due development board, giving it an extensive open-source software ecosystem.
Design consideration: the 100-ball TFBGA package requires controlled-impedance PCB layout with via-in-pad or escape routing; plan at least a six-layer or well-planned four-layer board for the Ethernet and USB interfaces.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATSAM3X8CA-CU ——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： ATSAM3X8CA-CU （相同外形与封装尺寸） ——差异在于 Package, Series, Flash Memory, Connectivity, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
ATSAM3X4CA-CU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$6.1 / 个
查看数据手册 →ATSAM3S8CA-CU
✅ 直接替换✓ 有现货
$5.25 / 个
查看数据手册 →ATSAM3SD8CA-CU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.41 / 个
查看数据手册 →ATSAM3S4CA-CU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.95 / 个
查看数据手册 →ATSAM3N4BA-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.48 / 个
查看数据手册 →ATSAM3X8CA-CU 最大额定值与电气特性
| Core Processor | ARM Cortex-M3 revision 2.0 |
| Core Size | 32-bit |
| Maximum Clock Speed | 84 MHz |
| Flash Memory | 512KB (512K x 8), 2 x 256KB banks |
| SRAM | 96KB (64KB + 32KB) |
| Instruction Set | Thumb-2 |
| Memory Protection | MPU (Memory Protection Unit) |
| SysTick Timer | 24-bit |
| Connectivity | CAN, Ethernet, I2C, IrDA, LIN, MMC, SPI, SSC, UART, USB |
| 电源电压 | 1.8V / 2.5V / 3.3V |
| 封装 | 100-TFBGA (9x9 mm) |
| 安装类型 | Surface Mount |
| Interrupt Controller | NVIC (Nested Vector Interrupt Controller) |
| RoHS 状态 | Compliant (Green package per distributor data) |
| Series | SAM3X |
ATSAM3X8CA-CU 100-tfbga (9x9 mm) 引脚配置指南
ATSAM3X8CA-CU（100-tfbga (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： ATSAM3X8CA-CU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM3X8CA-CU 适用于 6 应用s: Industrial Automation and Control Nodes, Embedded Ethernet Gateways, USB-Connected Test and Measurement Instruments, Building Automation and Security Panels, IoT Edge Nodes and Smart Devices, Robotics and Motor Control Communication Hubs.
Industrial Automation and Control Nodes
The ATSAM3X8CA-CU fits industrial control nodes because its dual CAN controllers and 84 MHz Cortex-M3 core handle deterministic real-time fieldbus communication while running control loops. The 512KB dual-bank flash supports firmware update schemes in deployed equipment, and the MPU enables RTOS task isolation for safety-adjacent logic. Typical deployments place the MCU on a 3.3V rail with SPI-isolated I/O and CAN transceivers; the NVIC provides deterministic interrupt latency for time-critical CAN message handling. Compared to smaller SAM3S parts, the SAM3X removes the need for an external CAN controller, reducing BOM complexity in multi-node factory automation networks.
推荐
Embedded Ethernet Gateways
The ATSAM3X8CA-CU is well suited to protocol gateway designs because its integrated Ethernet MAC eliminates external network controllers, while CAN, UART, SPI, and SSC peripherals bridge legacy field buses to IP networks. With 96KB of SRAM (64KB + 32KB banks), the part has headroom for TCP/IP stacks such as lwIP alongside application buffers. At 84 MHz the Cortex-M3 sustains line-rate small-packet forwarding for low-traffic industrial links; a dedicated Ethernet PHY such as the KSZ8081 connects via RMII. The dual 256KB flash banks enable redundant-image bootloaders, an important reliability feature for remotely deployed gateways that cannot be serviced easily.
推荐
USB-Connected Test and Measurement Instruments
The ATSAM3X8CA-CU's USB device port, high-speed SPI, and SSC (synchronous serial controller) make it a strong fit for bench instruments that stream sensor or ADC data over USB to host software. The 84 MHz core sustains 12 Mbps full-speed USB traffic while concurrently servicing SPI or SSC data streams, and the 96KB SRAM buffers burst acquisitions. Its dual-bank flash supports in-field firmware upgrades - a standard requirement for instrumentation. This is the same MCU family (ATSAM3X8E) used in the Arduino Due, so ASF3 driver libraries and community USB stack code substantially shorten firmware development time for measurement products.
推荐
Building Automation and Security Panels
Building automation controllers benefit from the ATSAM3X8CA-CU's combination of CAN, LIN, UART, and Ethernet connectivity, letting a single chip talk to HVAC field devices, access-control readers, and supervisory IP networks. The 512KB flash accommodates protocol stacks plus application logic, and the MPU partitions RTOS tasks handling network input from safety-relevant door/alarm control code. The 100-ball 9x9 mm TFBGA keeps board area small for DIN-rail and panel-mount controllers. Running from 3.3V, the SAM3X interfaces directly with standard RS-485 transceivers via its USARTs for Modbus RTU slave or master implementations.
推荐
IoT Edge Nodes and Smart Devices
For connected edge devices, the ATSAM3X8CA-CU offers wired connectivity (Ethernet and USB) with enough compute at 84 MHz to preprocess sensor data before uplink, reducing cloud bandwidth costs. The 512KB flash holds both a protocol stack and OTA-capable bootloader, and the 24-bit SysTick timer supports freeRTOS scheduling for concurrent sensor sampling and network tasks. The two SRAM banks allow DMA-heavy ADC buffering to run independently of the network stack's heap, improving real-time behavior. Its green RoHS-compliant BGA package suits compact smart-meter and smart-building hardware where a wired backhaul is preferred over wireless modules.
推荐
Robotics and Motor Control Communication Hubs
Robotics controllers use the ATSAM3X8CA-CU as a communication and supervision hub: its CAN controllers link motor drive nodes, SSC interfaces encoders, and Ethernet connects to a host controller. The 84 MHz Cortex-M3 with NVIC handles periodic control coordination with deterministic latency, while 96KB SRAM holds trajectory queues and CAN transmit buffers. The Thumb-2 instruction set keeps control code compact within the 512KB flash even with multiple protocol stacks resident. Because this is the Arduino Due MCU family, ROS-adjacent firmware builders can prototype on Due hardware before moving to the custom BGA100 board.
推荐
推荐产品汇总
工程参考数据： ATSAM3X8CA-CU ——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 | ATSAM3X4CA-CU | ATSAM3S8CA-CU | ATSAM3SD8CA-CU | ATSAM3S4CA-CU | ATSAM3N4BA-MU |
|---|---|---|---|---|---|---|
| Package | 100-TFBGA (9x9 mm) | 100-TFBGA (9x9 mm) - same | 100-ball BGA - same footprint | 100-TFBGA (9x9 mm) - same | 100-TFBGA (9x9 mm) - same | 100-TFBGA - same footprint (verify ball map) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | ARM Cortex-M3, 84 MHz | ARM Cortex-M3, 84 MHz | ARM Cortex-M3, 84 MHz | ARM Cortex-M3, 84 MHz | ARM Cortex-M3, 84 MHz | ARM Cortex-M3, 84 MHz |
| Flash Memory | 512KB (2 x 256KB banks) | 256KB | 512KB | 512KB | 256KB | 512KB |
| Ethernet MAC | Yes | Yes | No | No | No | No |
| CAN Controllers | Yes | Yes | No | No | No | No |
| USB Device | Yes | Yes | Yes (HS device) | Yes | Yes | No |
关键差异点
- Integrated Ethernet MAC plus dual CAN in one MCU （对比 ATSAM3S8CA-CU)
- Maximum flash in the 100-pin family （对比 ATSAM3X4CA-CU)
- Mature Arduino Due ecosystem （对比 ATSAM3SD8CA-CU)
设计说明
The 100-ball TFBGA (9x9 mm, 0.8 mm ball pitch class) requires escape routing on at least two signal layers plus dedicated power and ground planes. Plan fan-out symmetrically from the ball grid: use via-in-pad (filled/capped) or dog-bone escapes, and reserve the inner ball rows for power/ground pairs. Ethernet RMII and USB differential pairs need controlled-impedance routing (90 ohm differential for USB). Start layout from the Microchip SAM3X reference design (used in the Arduino Due for the LQFP variant) to inherit proven decoupling and crystal placement.
The SAM3X supports 1.8V, 2.5V, or 3.3V supply operation; most designs run the core and I/O from a single 3.3V rail with the on-chip regulator handling the core domain. Decouple each VDD ball with 100 nF close to the ball, plus bulk 10 uF per supply domain. Estimated: at 84 MHz the core current is in the tens of mA range (see datasheet power consumption tables), so a 150-200 mA LDO budget for the MCU plus transceivers is a reasonable starting point - confirm against the datasheet current consumption figures for your exact clock configuration.
Do not confuse order-code variants: the -CU suffix is the 100-ball TFBGA, while -AU is the 100-lead TQFP - they are NOT footprint-compatible despite sharing the same die. Also verify the SAM3X8CA (100-pin) vs SAM3X8E (144-pin) peripheral multiplexing: pin counts differ and the Arduino Due examples map to the 144-pin part. When substituting SAM3S-family parts on the same BGA100 footprint, recheck the ball map and the absence of Ethernet/CAN peripheral support in your firmware before committing.
合规信息
Distributor listings describe the package as 'GREEN IND TEMP, MRLA' (green/halogen-free, industrial temperature). REACH and conflict-minerals status not stated in provided data.
