ATTINY25-15ST1

Overview

The ATTINY25-15ST1 is an automotive-grade 8-bit AVR microcontroller manufactured by Microchip Technology. It features a high-performance RISC core operating at speeds up to 16 MHz within the 4.5V to 5.5V supply range, and up to 8 MHz between 2.7V and 5.5V. The device includes 2KB of in-system programmable Flash memory, 128 bytes of EEPROM, and 128 bytes of internal SRAM. It operates across an extended temperature range of -40°C to +125°C and utilizes an 8-pin SOIC package.

Feature Summary

• Automotive quality grade verified per AEC-Q100 standards for reliability
• High-performance single-cycle execution AVR enhanced RISC architecture
• Integrated universal serial interface supporting SPI communication protocols
• Low power consumption with multiple selectable sleep modes

Applications

• Automotive embedded control systems requiring extended temperature tolerance
• Industrial applications utilizing in-system programming via SPI port
• Battery-powered devices optimized through picoPower technology and low current modes

Procurement Notes

Verify the specific suffix 'ST1' against official Microchip documentation to confirm the exact temperature grade and package configuration. Ensure compatibility with existing PCB footprints for the 8-pin SOIC format. Confirm that the selected variant meets the required ISO-TS-16949 quality standards for your specific manufacturing environment.

Selection Notes

Select this component when automotive qualification and wide temperature operation are mandatory. The 2KB Flash capacity suits compact firmware requirements. Consider the 16MHz maximum speed for performance needs within the higher voltage operating range. Evaluate the 8-pin SOIC package constraints against available board space and thermal dissipation requirements.

Part Context

This part belongs to the ATtiny25/45/85 Automotive family, designed specifically for harsh environments. It shares architectural similarities with standard industrial variants but adheres to stricter automotive reliability criteria. The device integrates essential peripherals like ADCs, timers, and watchdogs into a compact footprint suitable for resource-constrained embedded designs.

Replacement Considerations

Direct substitutes include other ATtiny25 variants such as ATTINY25-10SSU or ATTINY25-20SSU, provided their temperature grades and speed ratings align with system requirements. Verify pinout compatibility and ensure the replacement supports the necessary SPI programming interface.