ATTINY261-20PU

Overview

The Atmel ATTINY261-20PU is an 8-bit microcontroller based on the AVR RISC architecture, housed in a 20-pin PDIP package. It features 2 kB of In-System Programmable Flash memory, 128 bytes of EEPROM, and 128 bytes of SRAM. The device supports a maximum clock frequency of 20 MHz and operates within a supply voltage range of 2.7 V to 5.5 V. Key peripherals include one SPI channel, one I2C interface, one 8-channel 10-bit ADC, and one PWM unit.

Feature Summary

• AVR high-performance RISC core with 131 powerful instructions
• In-system programmable flash memory for code updates
• Integrated analog-to-digital converter with multiple channels
• Supports serial programming and debugWIRE debugging

Applications

• Battery-powered consumer electronics
• Simple sensor interfaces
• Basic control logic systems
• Low-cost embedded applications

Procurement Notes

Verify the manufacturer date code and lot number against the datasheet specifications to ensure component authenticity. Confirm that the PDIP package dimensions match the target PCB footprint requirements. Check for any specific RoHS compliance markings if environmental regulations apply to the final assembly. Ensure the operating temperature range meets the system's thermal design constraints.

Selection Notes

Select this model when a low pin count and minimal peripheral set are sufficient for the application. The 20-pin PDIP package is suitable for through-hole prototyping or environments requiring mechanical robustness. Consider the 20 MHz speed limit and limited memory size when evaluating processing requirements compared to higher-end ATtiny variants.

Part Context

This component belongs to the ATtiny family of 8-bit microcontrollers produced by Atmel, now part of Microchip Technology. The series is designed for cost-sensitive applications requiring moderate performance and low power consumption. The ATTINY261 variant specifically targets simple control tasks with basic analog and digital communication capabilities.

FAQ

Does the ATTINY261-20PU support UART communication?

No, the ATTINY261 does not have a dedicated hardware USART/UART module. Serial communication must be implemented using bit-banging techniques via general-purpose I/O pins.

What is the maximum operating voltage for this device?

The maximum operating voltage is 5.5 V. The device is rated for operation between 2.7 V and 5.5 V depending on the clock frequency selected.