ATTINY861-15SZ

Overview

The ATTINY861-15SZ is an automotive-grade, low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 8K bytes of in-system programmable Flash memory with 10,000 write/erase cycle endurance, 512 bytes of EEPROM with 100,000 cycle endurance, and 512 bytes of internal SRAM. The device operates within a voltage range of 2.7V to 5.5V and supports clock speeds up to 16MHz at 4.5V–5.5V or 8MHz at 2.7V–5.5V. It includes 16 programmable I/O lines, a 10-bit ADC with multiple channel configurations, timers, and a universal serial interface.

Feature Summary

• Automotive qualification verified per AEC-Q100 Grade 1 standards and ISO-TS 16949 manufacturing requirements.
• High-performance execution achieving throughput approaching 1MIPS per MHz via single-cycle RISC architecture.
• Integrated debugWIRE on-chip debug system for in-system programming and debugging via SPI port.
• Multiple power-saving modes including idle, ADC noise reduction, and power-down to optimize energy consumption.

Applications

• Automotive control systems requiring extended temperature operation
• Industrial control applications needing robust non-volatile memory
• Consumer electronics utilizing touch sensing interfaces

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type, as the datasheet lists SOIC, MLF, and TSSOP options. Confirm the speed grade matches the target operating voltage and frequency constraints. Ensure the component meets the specified automotive temperature range if deployed in vehicle environments. Cross-reference the manufacturer part number with current availability status before finalizing procurement plans.

Selection Notes

Select this model when automotive reliability and wide temperature tolerance are mandatory. The 8KB Flash capacity suits complex firmware requirements compared to smaller variants. Consider the 16MHz maximum speed for time-critical processing tasks. Evaluate the 10-bit ADC resolution against sensor precision needs. Verify that the 2.7V minimum supply voltage aligns with the system power design.

Part Context

This component belongs to the ATtiny261/461/861 family of 8-bit AVR microcontrollers designed for cost-sensitive industrial and consumer markets. The series utilizes Atmel's high-density non-volatile memory technology and picoPower technology. It serves as a scalable solution within the AVR ecosystem, offering varying memory sizes while maintaining consistent peripheral sets and instruction sets.

Replacement Considerations

Public confirmed substitute part numbers: ATTINY861A-MU, ATTINY861V-10PU, ATTINY861V-10MUR.