ATTINY261A-SU

Overview

The ATTINY261A-SU is an 8-bit AVR microcontroller in a 20-lead SOIC package. It features 2K bytes of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. The device operates at speeds up to 20 MHz with a supply voltage range of 1.8V to 5.5V. Key peripherals include 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 executing most instructions in a single clock cycle for high throughput efficiency.
• Non-volatile memory segments including self-programmable Flash, EEPROM, and internal SRAM with data retention capabilities.
• Integrated peripheral set featuring a 10-bit ADC, programmable watchdog timer, and universal serial interface.

Applications

• Battery-powered embedded systems requiring low power consumption and extended data retention.
• Industrial control applications utilizing the industrial temperature range and robust non-volatile memory.
• Sensor interfaces leveraging the multi-channel ADC and analog comparator for signal conditioning.

Procurement Notes

Verify the specific speed grade suffix matches the required operational frequency and voltage range. Confirm the 'SU' designation corresponds to the 20-lead SOIC package type. Ensure the ordering code aligns with the intended industrial temperature operating range as specified in the manufacturer's documentation.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required within a compact surface-mount footprint. Consider the available I/O lines and peripheral count against application requirements. Evaluate the memory size constraints relative to program storage needs before finalizing the selection.

Part Context

This device belongs to the ATtiny261A/461A/861A family of 8-bit microcontrollers based on the AVR enhanced RISC architecture. The family shares common core features but varies in memory capacity. The ATTINY261A represents the entry-level configuration within this series, offering 2K bytes of Flash memory.

Replacement Considerations

ATtiny461A-SU

FAQ

How does the USI interface support communication protocols?

The Universal Serial Interface (USI) can be configured to implement standard SPI or I2C compatible communication protocols using software control.

What sleep modes are supported by the ATTINY261A?

The device supports four software-selectable power-saving modes: Idle, ADC Noise Reduction, Standby, and Power-Down.