ATTINY861A-SU

Overview

The ATTINY861A-SU is an 8-bit AVR microcontroller featuring 8KB of In-System Programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at speeds up to 20 MHz with a throughput of 20 MIPS at 20 MHz. The device supports a supply voltage range of 1.8V to 5.5V and includes 16 programmable I/O lines. Key peripherals include a 10-bit ADC with 11 single-ended channels, two timers/counters, and a Universal Serial Interface.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high efficiency
• Non-volatile memory segments with high endurance specifications for program and data storage
• Integrated analog subsystem including a 10-bit ADC and programmable analog comparator
• Multiple power-saving sleep modes to optimize energy consumption during idle periods

Applications

• Sensorless control systems for switched reluctance motor drives
• Configurable three-phase BLDC fan applications using sensorless control strategies
• General-purpose embedded control requiring low-power operation and multiple I/O interfaces

Procurement Notes

Verify the specific speed grade suffix matches the required operational frequency for the target voltage range. Confirm the package type corresponds to the design footprint. Check current product status as availability may vary by region. Ensure compliance with environmental directives such as RoHS if required for the application.

Selection Notes

Select this component when 8KB of flash memory is necessary compared to smaller variants like the ATtiny461A or ATtiny261A. The SOIC-20 package is suitable for surface mount assembly where space is constrained but through-hole options are not preferred. Consider the 20 MHz maximum speed requirement against lower speed grades if power consumption is a critical constraint.

Part Context

This part belongs to the ATtinyx61A family of 8-bit microcontrollers based on the AVR enhanced RISC architecture. It shares core features with the ATtiny261A and ATtiny461A, differing primarily in memory capacities. The family is designed for applications requiring a balance of processing power, peripheral richness, and low power consumption.

Replacement Considerations

ATtiny861A-MU

FAQ

What is the maximum operating frequency for the ATTINY861A-SU?

The device supports a maximum CPU frequency of 20 MHz.

Does the ATTINY861A-SU support in-system programming?

Yes, it supports In-System Programming (ISP) via the SPI port.

How many general purpose I/O lines does this microcontroller provide?

It provides 16 programmable I/O lines organized into Port A and Port B.