ATTINY861-15XD

Overview

The ATTINY861-15XD is an automotive-grade 8-bit AVR microcontroller featuring 8K bytes of in-system programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at speeds up to 16 MHz at 4.5–5.5V or 8 MHz at 2.7–5.5V. The device includes a 10-bit ADC with 11 single-ended channels, three high-frequency PWM outputs, and a Universal Serial Interface. It supports debugWIRE and offers low-power modes including idle, power-down, and ADC noise reduction.

Feature Summary

• Automotive quality grade verified per AEC-Q100 standards for reliability
• High-performance RISC architecture achieving near 1 MIPS per MHz throughput
• Integrated analog comparator and programmable watchdog timer
• Supports in-system programming via SPI port

Applications

• Sensorless control of 3-phase BLDC fans
• Automotive electronic modules requiring extended temperature ranges
• Low-power embedded systems utilizing sleep modes

Procurement Notes

Verify the specific suffix 'XD' against official Microchip documentation to confirm package type and temperature grade. Confirm current production status as automotive variants may have distinct lifecycle classifications compared to standard commercial parts.

Selection Notes

Select this component when automotive qualification (AEC-Q100) is mandatory. Ensure voltage requirements align with the 2.7V to 5.5V operating range. Consider the 16MHz speed limit at lower voltages if designing for 2.7V operation.

Part Context

This part belongs to the ATtiny261/461/861 family, which shares identical core architectures and peripheral sets. Variations within the family primarily differ in memory capacities (2K, 4K, or 8K Flash) and package options such as SOIC, TSSOP, or MLF.

Replacement Considerations

Consult official substitution lists for equivalent automotive-grade AVR devices. Verify that any replacement maintains the required -40°C to +125°C operating temperature range and AEC-Q100 compliance.