ATTINY861A-XUR

Overview

The ATTINY861A-XUR is an 8-bit AVR RISC microcontroller from the ATtinyx61A family, manufactured by Microchip Technology. It features 8KB of Flash program memory, 512B of SRAM, and a maximum CPU frequency of 20MHz. The device operates within a voltage range of 1.8V to 5.5V and includes 16 I/O pins. It supports SPI and USI interfaces and contains two timers with three PWM channels.

Feature Summary

• Integrates sensorless control capabilities for configurable three-phase BLDC fan applications
• Supports low-voltage operation down to 1.8V at reduced clock speeds
• Includes hardware support for motor control configuration via PC-based utilities

Applications

• Configurable three-phase brushless DC (BLDC) fan systems
• Sensorless motor control implementations
• Embedded motor management circuits

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature grade. Ensure the ordering code matches the required VQFN-32 form factor and industrial specifications. Cross-reference the part number with current datasheets to validate active status and compliance details before procurement.

Selection Notes

Select this component for designs requiring integrated sensorless BLDC control logic within a compact 8-bit MCU architecture. Consider the 20MHz performance limit and 8KB memory capacity for application complexity. Verify that the VQFN-32 package aligns with PCB layout constraints and thermal requirements.

Part Context

This part belongs to the ATtinyx61A series of 8-bit microcontrollers. It shares core architectural features with other members of the family but is distinguished by its specific memory size, package variant, and operational speed ratings defined in the official product specification.

Replacement Considerations

Consult official substitution guides for compatible ATtinyx61A variants. Verify pin compatibility and electrical characteristics before replacing with similar packages or speed grades.