ATXMEGA16D4-CU - 32MHz 16KB AVR MCU | Microchip
MPN: ATXMEGA16D4-CU ✓ ActiveATXMEGA16D4-CU Overview
An AVR XMEGA microcontroller is an embedded-control IC combining an enhanced AVR RISC processing core, nonvolatile program memory, data EEPROM, SRAM, and event-driven peripherals in one device. Within the product hierarchy, ATxmega16D4 is a low-power 8/16-bit MCU in the AVR XMEGA family, designed for compact control systems that require flexible timers, serial communication, and deterministic peripheral handling without a separate external microcontroller.
The verified 32 MHz operating speed provides useful processing margin for protocol handling, state-machine control, and concurrent peripheral operation. Its 16 KB ISP Flash includes a 4 KB boot-code section and supports read-while-write operation. The 1 KB EEPROM provides nonvolatile parameter storage, while 2 KB SRAM supports working data and stack requirements. Read-while-write capability can also reduce the flash-update penalty when self-programming is used.
The peripheral set is designed for event-based control rather than simple polling alone. The four-channel event system can connect timer, comparator, and interrupt-related events, while four 16-bit timer/counters support timing, compare, and PWM functions. Two USARTs and two SPI interfaces permit simultaneous serial-device connections, making the device useful for compact industrial controllers, instrumentation, motor-control auxiliaries, and connected embedded products.
ATXMEGA16D4-CU is supplied in a surface-mount 49-VFBGA package, supporting compact PCB layouts but requiring careful escape routing and assembly-process control. The 5 mm by 5 mm land pattern saves board area relative to larger leaded or fine-pitch packages, although BGA inspection, X-ray analysis, and adequate solder-paste control may be necessary after assembly.
The key design consideration is interface planning. Developers should assign the 34 available I/O lines across communications, timers, control outputs, programming, and debugging while retaining suitable voltage-level compatibility for every attached peripheral. Because this page provides verified specifications, package information, procurement data, and explicit replacement caveats rather than repeating only basic catalog content, engineers can use it as a focused engineering and sourcing reference.
Drop-in alternatives for ATXMEGA16D4-CU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATXMEGA32D4-CU
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ATXMEGA32A4-CU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATXMEGA16A4-CU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATXMEGA16D4-CU Maximum Ratings & Electrical Characteristics
| Microcontroller Type | 8/16-bit AVR XMEGA microcontroller |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 16 KB (8K x 16) |
| Boot Code Section | 4 KB |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| General-Purpose I/O Lines | 34 |
| Event System | 4 channels |
| Real-Time Counter | 1 x 16-bit |
| Timer/Counter | 4 x flexible 16-bit with compare and PWM modes |
| USART | 2 |
| SPI | 2 |
| Programmable Multilevel Interrupt Controller | Yes |
| Supply Voltage | 2.7 V to 3.6 V |
| Package | 49-VFBGA, 5 mm x 5 mm |
| Mounting Type | Surface Mount |
| Read-While-Write | Supported |
| Lifecycle Status | Active |
ATXMEGA16D4-CU 49-vfbga, 5 mm x 5 mm Pin Configuration Guide
Pin configuration for ATXMEGA16D4-CU (49-vfbga, 5 mm x 5 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATXMEGA16D4-CU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATXMEGA16D4-CU is suitable for 6 applications: Industrial Sensor and Actuator Control, Connected IoT Gateway, Motor Control and PWM Auxiliary, Battery-Powered Instrumentation, Serial Protocol Bridge, LED and Display Control.
Industrial Sensor and Actuator Control
The ATXMEGA16D4-CU fits compact industrial sensing and actuator boards because its 34 general-purpose I/O lines can connect digital inputs, status indicators, and control outputs, while four flexible 16-bit timer/counters support timing and PWM functions. The 32 MHz operating speed provides processing headroom for sensor conditioning logic, filtering, debouncing, and state-machine control. Its two USARTs and two SPI interfaces allow simultaneous connection to sensors and local transceivers. In an industrial controller, the device can execute acquisition and control routines while using the event system to coordinate peripheral events. The engineering trade-off is its 16 KB Flash limit, which requires disciplined code organization or an external memory strategy for more complex algorithms.
Recommended
Connected IoT Gateway
The ATXMEGA16D4-CU is appropriate for a small IoT gateway that must consolidate several low-speed sensor links and local control functions. Two USARTs and two SPI interfaces permit connection of radios, memory, or sensor concentrators, while 34 I/O lines leave room for indicators and discrete controls. Its 16 KB Flash, 1 KB EEPROM, and 2 KB SRAM support compact protocol stacks rather than demanding edge-computing workloads. The 32 MHz clock rate allows event-driven communication and buffering, although network protocol complexity and security requirements must be checked against the available memory. EEPROM can retain calibration or provisioning values, reducing repeated writes to the 16 KB program Flash.
Recommended
Motor Control and PWM Auxiliary
The ATXMEGA16D4-CU can serve as a compact motor-control or PWM-generation element when the system does not require a dedicated advanced motor-driver IC. Its four flexible 16-bit timer/counters with compare modes and PWM outputs provide the timing resources needed for periodic generation and duty-cycle control, while the four-channel event system can coordinate timing events among peripherals. With 34 I/O lines, the MCU can also handle direction signals, fault inputs, and communication to a higher-level controller. Design validation must include current ratings, switching losses, dead time where required, and protection behavior because the MCU itself is not a power stage.
Recommended
Battery-Powered Instrumentation
The low-power AVR XMEGA architecture makes ATXMEGA16D4-CU relevant to portable measurement equipment where reduced computation between samples is important. The device combines a 32 MHz processing rate with timers, a real-time counter, event system, USARTs, and SPI interfaces, allowing a compact design to acquire data, timestamp events, and communicate with local storage or a host. Its 1 KB EEPROM can preserve calibration information, while 2 KB SRAM supports temporary measurement data. The main design trade-off is memory density: 16 KB Flash can constrain library size, and the exact active and sleep current figures must be taken from the current manufacturer datasheet for battery-budget calculations.
Recommended
Serial Protocol Bridge
ATXMEGA16D4-CU can bridge or translate between serial interfaces in embedded equipment because it provides two USARTs and two SPI interfaces in a 5 mm by 5 mm 49-VFBGA package. A gateway can receive data over one USART, validate or transform it, and forward it through another interface while timers manage timeouts and periodic status reporting. The four-channel event system can reduce polling overhead by linking timer and communication events. Designers should budget stack and buffer requirements against the available 2 KB SRAM and avoid placing time-critical protocol conversion in a device whose 16 KB Flash limit restricts simultaneous feature sets.
Recommended
LED and Display Control
The ATXMEGA16D4-CU is suitable for compact LED-status, signage, or display-control modules because its timer/counters provide multiple PWM and compare channels, while 34 I/O lines can support switches, indicators, and display-control signals. The 32 MHz core can coordinate animation timing, button input, and serial configuration without requiring a separate display controller. Two USARTs permit host updates or sensor input, while SPI can connect to compatible display or storage devices. The main engineering consideration is balancing update rate, serial traffic, and power use within a 16 KB program-memory budget; exact LED current limits and timing behavior should be derived from the selected external drivers and manufacturer timing specifications.
Recommended
Recommended Products Summary
Engineering reference data for ATXMEGA16D4-CU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATXMEGA32D4-CU | ATXMEGA32A4-CU | ATXMEGA16A4-CU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 49-VFBGA (5x5) | 49-VFBGA (5x5) | 49-VFBGA (5x5) | 49-VFBGA (5x5) |
| Microcontroller Architecture | 8/16-bit AVR XMEGA | 8/16-bit AVR XMEGA | 8/16-bit AVR XMEGA | 8/16-bit AVR XMEGA |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 16 KB | 32 KB | 32 KB | 16 KB |
Key Differentiators
- Lower verified unit price (vs ATXMEGA32D4-CU)
- Flash-to-feature balance (vs ATXMEGA32D4-CU)
- Compact communication-rich integration (vs ATXMEGA16A4-CU)
Design Notes
The 49-VFBGA package requires a manufacturer-approved land pattern and escape-routing strategy. Place the MCU so short high-speed routes can reach its power, ground, clock, programming, and communication pins without crossing sensitive analog signals. Because the verified sources do not provide the complete ball map, PCB engineers should use the current Microchip package drawing rather than reconstructing the footprint from the 5 mm by 5 mm body size alone.
Design the supply network for the verified 2.7 V to 3.6 V operating range and provide local high-frequency bypass close to the VDD and ground connections. The available 2.7 V lower limit leaves less margin for poor distribution or supply transients than a 3.0 V minimum design. Exact capacitor values, current limits, and sequencing requirements should follow the current Microchip datasheet, because those figures were not present in the supplied verified data.
Do not treat a same-family or same-package candidate as automatically interchangeable. ATXMEGA16D4-CU has 16 KB Flash, so firmware replacement must be checked for code size, boot-loader behavior, peripheral registers, interrupt priorities, and package ball assignments. ATXMEGA32D4-CU offers a 32 KB-class memory configuration, but that increase does not prove that every existing firmware and board configuration will operate without modification.
Plan clock and serial interfaces before assigning the remaining I/O resources. The four timer/counters, two USARTs, two SPI interfaces, event system, and real-time counter can reduce software polling, but they also create dependencies on accurate peripheral multiplexing. Keep clock routing compact, provide clean return paths for communications, and reserve debugging or programming access before assigning every available signal.
Compliance Information
The supplied verified results identify the part as active and describe its package and electrical characteristics, but they do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred from the manufacturer name or package type.
