ATTINY261-20SUR

Overview

The ATTINY261-20SUR is an 8-bit AVR microcontroller featuring 2 KByte of In-System Programmable Flash, 128 Bytes of EEPROM, and 128 Bytes of SRAM. It operates at a maximum clock frequency of 20 MHz when powered between 4.5 V and 5.5 V, or up to 10 MHz across the 2.7 V to 5.5 V range. The device includes an 11-channel 10-bit ADC, 16 programmable I/O lines, and interfaces such as SPI and USI. It is housed in a 20-pin SOIC package and supports industrial temperature ranges.

Feature Summary

• High-performance 8-bit AVR architecture with single-cycle execution for efficient processing
• Non-volatile memory with high endurance for Flash and EEPROM data retention
• Integrated analog peripherals including a 10-bit ADC and on-chip temperature sensor
• Multiple power-saving modes to optimize energy consumption during operation

Applications

• Battery-powered embedded systems requiring low power consumption
• Industrial control applications utilizing the industrial temperature range
• Sensor interface circuits leveraging the integrated ADC and temperature sensor
• Communication nodes using SPI or Universal Serial Interface protocols

Procurement Notes

Verify the specific speed grade suffix against the required operating voltage and frequency constraints. Confirm that the 20-pin SOIC package matches the PCB footprint requirements. Ensure the component meets the necessary environmental standards for the intended deployment location. Cross-reference the manufacturer part number with official Microchip documentation to confirm current production status.

Selection Notes

Select this model when 2 KByte of program memory is sufficient for the application logic. Choose this variant over higher-memory options if cost and pin count are primary constraints. Consider the 20 MHz speed grade only if the supply voltage remains stable above 4.5 V. Evaluate the 10-bit ADC resolution against signal accuracy requirements before finalizing the design.

Part Context

This component belongs to the ATtiny261 family within the Microchip AVR portfolio. It shares architectural similarities with the ATtiny461 and ATtiny861, differing primarily in memory capacities. The series is designed for cost-sensitive applications requiring reliable 8-bit processing capabilities with integrated analog features.

Replacement Considerations

Direct substitutes include ATTINY461-20SUR and ATTINY861-20SUR for increased memory capacity. For lower memory requirements, ATTINY26V-20SUR offers extended low-voltage operation.