ATXMEGA16A4-CU - 32MHz 16KB AVR MCU | Microchip Technology
料号： ATXMEGA16A4-CU ✗ 停产ATXMEGA16A4-CU 概述
An 8/16-bit microcontroller is a semiconductor that executes embedded control instructions and connects digital peripherals to a larger product. The AVR enhanced RISC architecture belongs to the microcontroller hierarchy: MCU, embedded processor, integrated circuit, and semiconductor. Compared with a larger general-purpose MCU, the ATXMEGA family targets compact control systems that require deterministic peripheral operation, efficient code execution, and low-power characteristics.
The headline features combine 32 MHz processing with 16 KB Flash, 4 KB boot-code section, 2 KB SRAM, and 1 KB EEPROM. The separate boot-code area can hold code used for boot operations, while the SRAM supports working data and the EEPROM provides nonvolatile storage. The device also includes an external bus interface, expanding its connection options for embedded systems that need access to external peripherals or memory.
The ATXMEGA16A4 is based on the AVR enhanced RISC architecture and belongs to Microchip's XMEGA A4 family. Its 8/16-bit architecture is suitable for compact embedded control tasks combining interrupt-driven peripherals, serial communication, and local data storage. Because the verified manufacturer information identifies the A4 series as not recommended for new designs, engineers should evaluate the recommended XMEGA AU series before beginning a new product design.
Typical uses include compact industrial controllers, sensor-hub and IoT edge nodes, low-power embedded instruments, and portable products requiring 1.6 V to 3.6 V operation. The 49-VFBGA package also supports space-constrained designs, although its fine pitch requires careful PCB layout and assembly. The 16 KB Flash and 2 KB SRAM limit memory-intensive workloads, so protocol buffering or complex user interfaces may require external components.
A critical design consideration is lifecycle status: Microchip lists ATXMEGA16A4 as not recommended for new designs and recommends the XMEGA AU series. For an existing ATXMEGA16A4-CU design, preserve the exact 49-VFBGA footprint, validate the original power, clock, peripheral, and memory assumptions, and avoid treating a family-related device as a drop-in replacement without a complete pin and firmware review.
This page consolidates verified manufacturer and distributor information for ATXMEGA16A4-CU, including memory configuration, package constraints, sourcing links, lifecycle guidance, and engineering-oriented application analysis. It also clearly separates verified device data from replacement candidates that were not demonstrated to be pin-to-pin compatible.
直接替换替代料： ATXMEGA16A4-CU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料ATXMEGA16A4-CU 最大额定值与电气特性
| Product Type | 8/16-bit AVR XMEGA A4 microcontroller |
| 最大时钟频率 | 32 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| Boot Code Section | 4 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| 工作电源电压 | 1.6 V to 3.6 V |
| 封装 | 49-VFBGA (5 x 5 mm) |
| 安装类型 | Surface mount |
| Core Architecture | AVR enhanced RISC |
| External Bus Interface | Available |
| Programmable Memory Type | Self-programming Flash |
ATXMEGA16A4-CU 49-vfbga (5 x 5 mm) 引脚配置指南
ATXMEGA16A4-CU（49-vfbga (5 x 5 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： ATXMEGA16A4-CU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATXMEGA16A4-CU 适用于 6 应用s: Compact Industrial Control Node, Battery-Powered Sensor Hub, IoT Edge Communication Controller, Portable Measurement Instrument, Low-Voltage Embedded Peripheral Controller, Legacy Equipment Maintenance Controller.
Compact Industrial Control Node
The ATXMEGA16A4-CU fits a compact industrial controller when the required code fits within 16 KB Flash and working data fits within 2 KB SRAM. Its 32 MHz clock provides useful headroom for interrupt-driven control, status handling, and communication tasks, while the 1 KB EEPROM can retain configuration values locally. The 49-VFBGA 5 x 5 mm package helps reduce board area in densely populated control assemblies. Designers must provide 1.6 V to 3.6 V supply regulation, package-specific decoupling, and careful validation of industrial temperature requirements. Because the A4 family is not recommended for new designs, this application is best treated as maintenance or redesign support rather than a new platform choice.
推荐
Battery-Powered Sensor Hub
ATXMEGA16A4-CU can serve as the local controller in a battery-powered sensor hub when the design operates within its verified 1.6 V to 3.6 V range and the application does not exceed the available memory. The 32 MHz AVR core can coordinate sensor sampling, filtering, local status logic, and communication buffering, while 2 KB SRAM and 1 KB EEPROM provide on-chip working and configuration storage. The small 49-VFBGA package minimizes board footprint. Exact sleep-mode current, active current, analog accuracy, and wake-up timing are not present in the supplied verified data, so they must be taken from the manufacturer datasheet before estimating battery life.
推荐
IoT Edge Communication Controller
The ATXMEGA16A4-CU is appropriate for a small IoT edge node that performs protocol framing, local state management, and peripheral control before data is sent to a larger network processor. Its 32 MHz operating speed, 16 KB self-programming Flash, 2 KB SRAM, and external bus interface can support modest real-time workloads without an external microcontroller. The 1.6 V to 3.6 V operating range integrates well with low-voltage system rails, while the 49-VFBGA package reduces board size. Exact UART, SPI, I2C, timer, and I/O configurations must be verified for the selected device, and firmware must fit both Flash and SRAM with margin.
推荐
Portable Measurement Instrument
ATXMEGA16A4-CU can support portable measurement equipment when the instrument requires local acquisition control, calibration storage, and a compact board layout. The 32 MHz processor can supervise sequential measurements and data formatting, while 1 KB EEPROM can hold calibration or configuration information and 4 KB of the Flash family allocation is identified as boot-code section. The 1.6 V to 3.6 V supply range accommodates low-energy rails, and the 5 x 5 mm 49-VFBGA package supports miniaturization. Analog front-end requirements, ADC resolution, accuracy, and noise must be checked separately because the supplied verified data does not state those specifications.
推荐
Low-Voltage Embedded Peripheral Controller
ATXMEGA16A4-CU is a practical controller for a low-voltage embedded peripheral that must combine local logic, nonvolatile parameters, and external-bus connectivity. Its 16 KB Flash supports a dedicated embedded program, 2 KB SRAM handles working state, and 1 KB EEPROM retains user configuration. The 49-VFBGA package can reduce connector and board-space requirements, while 32 MHz execution capability allows responsive interrupt-driven behavior. The exact external-bus timing, I/O levels, power consumption, and peripheral assignments require confirmation in the Microchip datasheet and the exact package drawing. Prototype layouts should also account for fine-pitch assembly and thermal verification.
推荐
Legacy Equipment Maintenance Controller
ATXMEGA16A4-CU is well suited to maintaining an existing 49-VFBGA-based product when its original firmware and board layout are already established. The device retains the verified 32 MHz AVR XMEGA A4 configuration, 16 KB Flash, 4 KB boot-code section, 2 KB SRAM, and 1 KB EEPROM, allowing a replacement to target the same memory organization. This is especially useful when redesigning an older industrial or embedded system without changing its fine-pitch PCB. Engineers should still compare revision, temperature grade, errata, and package markings because those fields are not fully specified in the supplied data. For new platforms, Microchip's recommended XMEGA AU series should be evaluated instead.
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推荐产品汇总
工程参考数据： ATXMEGA16A4-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 |
|---|---|
| Package | 49-VFBGA (5 x 5 mm) |
| Brand | Microchip Technology |
| Maximum Clock Frequency | 32 MHz |
| Operating Supply Voltage | 1.6 V to 3.6 V |
| Flash Program Memory | 16 KB (8K x 16) |
| Boot Code Section | 4 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Architecture | 8/16-bit AVR enhanced RISC |
| Lifecycle Status | Not recommended for new designs |
| Verified Starting Price | $4.3143 as of 2026-10-28 |
关键差异点
- Compact integrated memory and processing in a 5 x 5 mm package （对比 ATXMEGA16A4-AU)
- 32 MHz operation with 16 KB self-programming Flash （对比 ATXMEGA32A4-CU)
- Single-chip control with on-chip SRAM and EEPROM （对比 ATXMEGA16A4-AU)
设计说明
Use the Microchip 49-VFBGA package drawing as the authoritative land-pattern and ball-location reference. The verified material confirms a 5 x 5 mm 49-VFBGA package but does not provide a complete ball map, so do not infer assignments from a generic BGA layout. Verify power, ground, decoupling, reset, programming, and signal balls against the current datasheet. Prototype assembly should use a process capable of handling the package's fine pitch, and the PCB should include accessible programming and test pads before final routing.
Design the supply for the verified 1.6 V to 3.6 V operating range and validate startup, shutdown, and transient behavior at both endpoints. Place required input and output capacitors close to the relevant device pins using the values and ESR recommendations in the manufacturer datasheet. Because the supplied excerpts do not provide complete current-consumption or decoupling tables, those values must not be estimated from the 32 MHz clock alone. Measure active and low-power current with production-representative firmware before establishing battery-life or thermal margins.
Do not treat any ATXMEGA16A4 package suffix as automatically interchangeable with ATXMEGA16A4-CU, and do not treat ATXMEGA32A4-CU as a drop-in part merely because it is a related XMEGA A4 device. The target uses the 49-VFBGA 5 x 5 mm package, while ATXMEGA16A4-AU is shown in the verified comparison material with a different 44-pin TQFP package. For replacements, verify ballout, voltage, clock, memory architecture, peripherals, firmware compatibility, and lifecycle. For new designs, follow Microchip's XMEGA AU series recommendation.
Keep sensitive analog, clock, and communication routing away from noisy power-conversion paths, even though the supplied verified excerpts do not provide a complete pin list. Preserve short return paths for ground and avoid routing high-current inputs beneath the BGA. Review the family datasheet's external-bus and clock guidance, maintain deterministic spacing between external-bus signals, and provide test access for power rails and programming signals. Complete signal-integrity and EMC checks using the actual external-bus rate and final board stack-up rather than the MCU's maximum clock frequency.
合规信息
The supplied verified product, distributor, and cross-reference snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred.
