ATXMEGA16A4-AU - 32MHz 16KB AVR MCU | Microchip Technology
N.º da peça: ATXMEGA16A4-AU ✗ Fim de vidaATXMEGA16A4-AU Visão geral
An AVR XMEGA microcontroller is an embedded-control semiconductor that combines an enhanced RISC processor core, Flash program memory, SRAM, EEPROM, event-system hardware, direct-memory-access support, and multiple communication peripherals. It belongs to the hierarchy of 8/16-bit microcontroller, embedded processor, and system-on-chip products intended for control-oriented products where deterministic event handling, low-power operation, and extensive on-chip peripherals can reduce external component count.
The ATXMEGA16A4 family provides 16 KB self-programming Flash with Read-While-Write capability, including a 4 KB boot-code section, and supplies up to 34 general-purpose I/O lines. Its four-channel DMA controller and eight-channel Event System can move data and trigger peripherals without repeated CPU intervention. The peripheral set includes a 16-bit real-time counter, five flexible 16-bit timer/counters with compare and PWM modes, and multiple USART and serial-interface resources for connected industrial and consumer equipment.
The device supports an operating supply range of 1.6 V to 3.6 V, while common 1.8 V, 2.5 V, and 3.3 V rails are identified in the comparison information. It can execute at 32 MHz and is positioned for applications requiring up to 32 MIPS throughput. Its event system and hardware DMA are especially useful when timing relationships between sensors, timers, communication blocks, and control outputs must remain deterministic without continuous software polling.
Typical uses include industrial control modules, compact sensor nodes, data-acquisition controllers, communication equipment, low-power embedded instruments, and compact consumer devices. The 44-pin TQFP package provides enough I/O for mixed analog and digital control systems while remaining compatible with conventional surface-mount assembly. The large SRAM and EEPROM also support buffered protocol handling, parameter storage, calibration records, and firmware state that would otherwise require external memory.
Design should account for the 1.6 V to 3.6 V operating range and confirm that attached peripherals use voltage-compatible signal levels. Decoupling, clock stability, programming access, and exposed peripheral routing should follow the pin-description and recommended-circuit diagrams in the manufacturer datasheet. Firmware migration should also confirm boot-loader behavior, peripheral differences, and clock settings before reusing an existing ATXMEGA16A4 design in a new product.
This page consolidates the device architecture, verified manufacturer and distributor specifications, same-footprint family alternatives, and practical replacement guidance. It also distinguishes direct procurement information from design parameters so engineers can evaluate the obsolete-position device, migration options, and application fit without relying on a raw listing alone.
Alternativas drop-in para ATXMEGA16A4-AU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATXMEGA16A4-AU (mesmo formato e footprint) — diferindo em Package, ADC, Program Memory (Flash), Event System Channels, SRAM.
ATXMEGA16A4U-AU
✅ Drop-InConsulte o preço
Ver ficha técnica →ATXMEGA32A4-AU
✅ Drop-InConsulte o preço
Ver ficha técnica →ATXMEGA32A4U-AU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATXMEGA16A4-AU Classificações máximas e características elétricas
| Microcontroller Type | 8/16-bit AVR XMEGA A4 |
| Maximum CPU Frequency | 32 MHz |
| Maximum Throughput | 32 MIPS |
| Operating Supply Voltage Range | 1.6 V to 3.6 V |
| Program Flash Memory | 16 KB |
| Boot Code Section | 4 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Program Memory Organization | 8K x 16 |
| General-Purpose I/O Lines | Up to 34 |
| DMA Channels | 4 |
| Event System Channels | 8 |
| Timer/Counters | 5 |
| Real-Time Counter | 16-bit |
| USART Count | 5 |
| External Bus Interface | Yes |
| Encapsulamento | 44-pin TQFP, 10 mm x 10 mm |
| Tipo de montagem | Surface Mount |
Guia de Configuração de Pinos do ATXMEGA16A4-AU 44-pin tqfp, 10 mm x 10 mm
Configuração de pinos para ATXMEGA16A4-AU (pacote 44-pin tqfp, 10 mm x 10 mm). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATXMEGA16A4-AU.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATXMEGA16A4-AU é adequado para 6 aplicaçãos: Industrial Sensor and Control Hub, Low-Power Sensor Node, Communication Equipment Controller, Data-Acquisition Front End, Programmable Control and Motor Timing, Bootloader and Service Interface Controller.
Industrial Sensor and Control Hub
The ATXMEGA16A4-AU fits compact industrial control and sensor-hub designs that need deterministic timing without relying on a large external microcontroller. Its five 16-bit timer/counters, 16-bit real-time counter, four DMA channels, and eight-channel Event System allow sensors, sampling routines, and actuator outputs to be coordinated through hardware events. Up to 34 I/O lines leave useful capacity for digital inputs, status indicators, and external interface devices. The 2 KB SRAM supports bounded protocol and control buffers, while 1 KB EEPROM can retain calibration or configuration values. The 1.6 V to 3.6 V range suits compact low-voltage systems, although new industrial designs should account for the manufacturer’s not-recommended-for-new-designs status and confirm the required environmental grade.
Recomendado
Low-Power Sensor Node
The ATXMEGA16A4-AU is suitable for a low-power environment-monitoring node that combines periodic sensing, local filtering, and delayed network reporting. Its low-power XMEGA A4 architecture supports embedded control while the event system can connect external sensor events to timers and serial interfaces with predictable timing. The 16 KB self-programming Flash includes a 4 KB boot-code section for controlled firmware updates, while the 2 KB SRAM can hold time-series data between transmissions. A 1.6 V to 3.6 V supply range allows operation from compact low-energy rails. Designers should use the manufacturer’s sleep-mode and clock-control guidance and avoid exceeding the peripheral limits of the exact 1.8 V, 2.5 V, or 3.3 V operating point.
Recomendado
Communication Equipment Controller
ATXMEGA16A4-AU can serve as the supervisory controller in connected industrial or embedded equipment requiring several serial links and structured event handling. Its five USARTs support multiple peer devices, while the four-channel DMA controller reduces CPU involvement during data transfer. The external bus interface adds another path for peripherals or memory, and the Event System can route timer, communication, and external signals without polling every peripheral. Its 32 MHz execution rate provides up to 32 MIPS throughput, while 16 KB Flash and 2 KB SRAM are adequate for protocol framing and a compact supervisory state machine. For USB-connected products, ATXMEGA16A4U-AU adds USB functionality in the same package family, but software architecture and pin use must be validated before substitution.
Recomendado
Data-Acquisition Front End
The ATXMEGA16A4-AU is appropriate for compact data-acquisition front ends that coordinate multiple sampling and transfer activities under real-time constraints. Its five flexible 16-bit timer/counters can define acquisition windows, trigger sampling operations, and generate precise timing signals. The Event System provides hardware paths between events and peripherals, while DMA can transfer sampled or received data with less CPU intervention than repeated interrupt servicing. A 4 KB boot-code section supports update-oriented designs, and the 2 KB SRAM can serve as a working buffer. The 32 MHz operating rate and 32 MIPS maximum throughput provide computational margin for filtering and protocol handling. Production designs should verify analog-interface requirements separately because the MCU’s general-purpose I/O does not replace precision analog front-end components.
Recomendado
Programmable Control and Motor Timing
ATXMEGA16A4-AU can coordinate programmable control tasks where accurate timer relationships, programmable outputs, and asynchronous events are required. The five timer/counters provide compare and PWM modes for actuator drive, while the 16-bit real-time counter supports time-based scheduling. Hardware Event System routing can connect external conditions to timer operations and interrupt handling, reducing software jitter in a control loop. The 34 available I/O lines support position inputs, control outputs, and status signals in a compact controller. The device runs from 1.6 V to 3.6 V and can execute at 32 MHz, leaving instruction bandwidth for motion logic and supervisory functions. Use the manufacturer timing diagrams to configure prescalers and compare values, and validate startup, fault handling, and thermal margins in the final enclosure.
Recomendado
Bootloader and Service Interface Controller
The ATXMEGA16A4-AU includes a 4 KB boot-code section within its 16 KB self-programming Flash, making it relevant to embedded products that require field firmware maintenance. The self-programming and Read-While-Write capabilities can support controlled application updates, while the boot area isolates service logic from normal firmware. Its multiple USARTs can expose maintenance and field-service paths, and the 2 KB SRAM provides room for transfer buffers. Because the device operates from 1.6 V to 3.6 V, service-interface transceivers must match the selected rail. For new products, evaluate the manufacturer-recommended XMEGA AU family and its update mechanism rather than extending a legacy maintenance architecture without reviewing security, endurance, and recovery requirements.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATXMEGA16A4-AU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATXMEGA16A4U-AU | ATXMEGA32A4-AU | ATXMEGA32A4U-AU |
|---|---|---|---|---|
| Package | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 4 KB |
Principais diferenciais
- Matches the core memory and speed of the closest USB-equipped family option (vs ATXMEGA16A4U-AU)
- Provides twice the Flash and SRAM of the target in the same package family (vs ATXMEGA32A4-AU)
- Combines higher-memory device positioning with USB capability (vs ATXMEGA32A4U-AU)
Notas de projeto
Design the supply rail for the ATXMEGA16A4-AU within its documented 1.6 V to 3.6 V operating range and account for the voltage-dependent limits of every connected peripheral. Place the device-side bypass capacitance at the pins according to the manufacturer’s recommended circuit, and route the supply and ground connections to minimize loop area. Because the target is not recommended for new designs, retain the existing rail design for a qualified product but use the recommended XMEGA AU family for new development.
Assign all 44 TQFP connections from the exact ATXMEGA16A4-AU pin-description table rather than a generic 44-pin package drawing. Keep programming signals, clock components, decoupling, and sensitive analog inputs away from high-current switching paths. A continuous ground plane should remain beneath the device where the package design permits, while exposed-pad treatment must follow the package drawing and assembly requirements. Confirm programming access and reset behavior in the final board layout.
Do not treat a same-package family member as an unconditional drop-in replacement. ATXMEGA16A4U-AU adds USB, while ATXMEGA32A4-AU and ATXMEGA32A4U-AU change memory capacity and may affect peripheral or firmware assumptions. Rebuild or review the linker memory map, boot code, interrupt vectors, USB stack, and application code before substituting any alternative. Validate startup, brownout behavior, peripheral timing, and field-update recovery on production hardware.
Use the XMEGA Event System and DMA intentionally when several timing-sensitive peripherals must operate together. Define event routing and transfer priorities early so timing does not depend on interrupt latency. Check clock-source configuration, prescaler values, compare periods, and PWM resolution using the family timing diagrams. In a new design, also evaluate the recommended AU-series device because event resources, peripheral assignments, and software support may differ.
Informações de conformidade
The manufacturer product page states that ATXMEGA16A4 is not recommended for new designs and directs users to the XMEGA AU series. No specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification claims were established for this exact suffix.
