The ATTINY861-20SUR is a high-performance, low-power AVR 8-bit microcontroller from Microchip Technology, offering a perfect blend of power efficiency and computing capability. This versatile microcontroller is ideal for a wide range of applications, from industrial control systems to consumer electronics.

At the heart of the ATTINY861-20SUR is a powerful RISC CPU that operates at up to 20MHz. It comes with 8KB of in-system programmable flash memory, 512B EEPROM, and 512B SRAM, providing ample space for code and data storage. The device supports a wide voltage range of 2.7V to 5.5V, making it suitable for battery-operated and portable applications.

The ATTINY861-20SUR features a variety of peripherals that enhance its functionality. It has 16 general-purpose I/O lines, a 10-bit ADC with 11 channels, and a programmable serial USART, which makes it easy to interface with other microcontrollers and peripherals. Additionally, this microcontroller includes two 8-bit timers/counters with separate prescaler and compare mode, and one 16-bit timer/counter with separate prescaler, compare mode, and capture mode.

For enhanced power management, the ATTINY861-20SUR includes power-on reset and programmable brown-out detection. It also supports an external and internal interrupt source, ensuring reliable performance in system-critical applications. The device's debugWIRE on-chip debug system enables developers to troubleshoot and optimize their applications.

The ATTINY861-20SUR is available in a compact 20-lead SOIC package, making it easy to integrate into space-constrained designs. Its robust design ensures operation in extreme environments, with an operational temperature range of -40°C to 85°C.

Overall, the ATTINY861-20SUR microcontroller is an excellent choice for designers looking for a feature-rich, low-power solution for their embedded systems. Its combination of performance, power efficiency, and versatile peripherals makes it a go-to choice for a broad array of applications.