ATTINY261A-PU

Overview

The ATTINY261A-PU is an 8-bit AVR microcontroller featuring 2K bytes of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. It provides 16 programmable I/O lines within a 20-pin PDIP package. The device supports speeds up to 20 MHz at 4.5–5.5V and includes an 11-channel 10-bit ADC, two timers/counters, a Universal Serial Interface (USI), and an on-chip analog comparator.

Feature Summary

• Advanced RISC architecture with single-clock-cycle execution for high throughput
• Integrated non-volatile memory segments with high endurance specifications
• Comprehensive peripheral set including multi-channel ADC and PWM outputs
• Multiple software-selectable power-saving modes for optimized energy consumption

Applications

• Battery-powered embedded systems requiring low active current
• Industrial control applications utilizing the USI protocol
• Sensor interfaces leveraging the 10-bit ADC and analog comparator
• Motor control designs using hardware PWM and dead time generation

Procurement Notes

Verify the specific speed grade required for the target operating voltage, as performance varies across 1.8V to 5.5V ranges. Confirm that the industrial temperature range (-40°C to +85°C) aligns with environmental requirements. Ensure programming tools support the SPI interface for in-system programming and check for any specific ordering suffixes if tape-and-reel packaging is needed instead of tubes.

Selection Notes

Select this component when a balance of processing speed and peripheral density is needed in a compact 20-pin form factor. The ATtiny261A offers higher ADC channel counts and additional timer capabilities compared to simpler ATtiny variants. Consider the extended temperature option if operation beyond standard industrial limits is necessary.

Part Context

This device belongs to the ATtinyx61A family, which shares core architectural features but differs in memory capacity. The ATtiny261A represents the entry-level configuration with 2KB Flash, while sibling parts like the ATtiny461A and ATtiny861A provide increased storage. All members utilize the same pinout and peripheral sets.

Replacement Considerations

ATtiny461A-PU

FAQ

How does the AVCC pin relate to VCC?

AVCC serves as the supply voltage for the ADC, analog comparator, and Port A. It must be externally connected to VCC, ideally through a low-pass filter if the ADC is utilized.

What sleep modes are supported?

The device supports four selectable modes: Idle, ADC Noise Reduction, Standby, and Power-Down, allowing optimization of power consumption versus wake-up time.