ATTINY261A-XUR

Overview

The ATTINY261A-XUR is an automotive-grade 8-bit AVR microcontroller featuring 2K bytes of in-system programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. It operates within a voltage range of 2.7V to 5.5V and supports clock frequencies up to 8MHz at the lower voltage limit, extending to 16MHz between 4.5V and 5.5V. The device utilizes a 32-pad MLF package and functions across an extended temperature range from -40°C to +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards
• High-performance RISC architecture achieving near 1 MIPS per MHz throughput
• Integrated 10-bit ADC with multiple single-ended and differential channel configurations
• Supports in-system programming via SPI interface

Applications

• Automotive electronic control units
• Sensor interface modules
• Low-power embedded systems requiring extended temperature operation

Procurement Notes

Verify that the specific suffix 'XUR' corresponds to the MLF-32 package and the Automotive grade (-40°C to +125°C) as defined in the official Microchip ordering information. Confirm the speed grade matches the required operating frequency for your target supply voltage. Ensure compatibility with existing PCB footprints for the 32-pad MLF form factor.

Selection Notes

Select this component when automotive reliability and wide temperature tolerance are mandatory. The ATtiny261A offers sufficient memory for basic logic control while maintaining low power consumption. Consider the 16MHz maximum speed if operating above 4.5V, or the 8MHz limit for broader voltage compatibility.

Part Context

This part belongs to the ATtinyx61A family of 8-bit AVR microcontrollers designed for cost-sensitive applications. The 'A' suffix typically denotes an enhanced version with improved features over previous generations. The 'XUR' designation specifically identifies the automotive qualified variant housed in a compact MLF package.

Replacement Considerations

Direct replacements include other ATtiny261 variants such as ATTINY261-MU or ATTINY261-MNR, provided they meet the same automotive temperature and voltage requirements. Verify pinout compatibility and ensure the substitute maintains the necessary AEC-Q100 certification.