ATXMEGA64A1U-CU

Overview

The ATXMEGA64A1U-CU is an 8/16-bit microcontroller from the AVR XMEGA A1U family, manufactured by Microchip Technology. It features a 32 MHz maximum clock frequency and operates within a supply voltage range of 1.6 V to 3.6 V. The device includes 64 KB of in-system self-programmable flash memory, 4 KB of internal SRAM, and 2 KB of EEPROM. It is housed in a 100-lead TQFP package (Package Type 100A) with dimensions of 14 x 14 mm and a lead pitch of 0.5 mm. The component supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-performance AVR CPU executing instructions in a single clock cycle for optimized power consumption versus processing speed.
• Includes a four-channel DMA controller and an eight-channel event system for efficient peripheral data handling without CPU intervention.
• Features a USB 2.0 full-speed interface compliant with low-speed operation, supporting up to 32 endpoints with flexible configuration.
• Provides cryptographic security through integrated AES and DES engines alongside CRC-16 and CRC-32 generators.

Applications

• Industrial control systems
• USB connectivity devices
• Medical applications
• Utility metering

Procurement Notes

Verify the specific package type 100A (TQFP) matches the design requirements. Confirm the operating temperature range covers the intended environment. Ensure the supply voltage aligns with the 1.6 V to 3.6 V specification. Check for RoHS compliance if required by regional regulations. Validate pinout compatibility with existing PCB layouts.

Selection Notes

Select this model when 64 KB of program memory is sufficient for the application logic. Choose the TQFP package for surface-mount assembly where board space allows for larger footprints compared to BGA options. Consider the integrated USB interface if direct host or device communication is needed without external transceivers. Evaluate the 78 available I/O pins against peripheral count requirements.

Part Context

This component belongs to the AVR XMEGA A1U series, designed for low-power, high-performance embedded applications. It shares architectural similarities with other members like the ATXMEGA64A1-AU but differs in package and specific feature sets such as the inclusion of the USB interface. The AU suffix indicates the inclusion of the USB module, distinguishing it from non-USB variants in the broader XMEGA lineup.

Replacement Considerations

ATXMEGA64A1U-AU offers identical electrical specifications and functionality but utilizes a 100-lead TQFP package variant. ATXMEGA64A1U-CUR provides the same core features in a tape-and-reel packaging format suitable for automated assembly processes.