ATTINY45-20MUR

Overview

The ATTINY45-20MUR is an 8-bit AVR microcontroller featuring 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes a 10-bit ADC with four single-ended channels, two high-frequency PWM outputs, and six programmable I/O lines. It utilizes a 20-pad QFN/MLF package.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for efficient processing.
• Non-volatile memory with high endurance capabilities for program and data storage.
• Integrated peripheral features including timers, counters, and a universal serial interface.
• Supports multiple low-power operating modes to optimize energy consumption.

Applications

• Battery-powered embedded systems requiring low power consumption
• Simple control applications utilizing the integrated ADC and PWM outputs
• Communication interfaces using the Universal Serial Interface (USI)
• Industrial environments within the specified temperature range

Procurement Notes

Verify the specific speed grade and package configuration against project requirements. Confirm that the 20-pad QFN/MLF footprint matches the PCB design. Ensure the supply voltage range aligns with the system's power rails. Check for any specific ordering suffixes required for tape and reel packaging if applicable to the assembly process.

Selection Notes

Select this component when 4K bytes of Flash memory and 256 bytes of RAM are sufficient for the application logic. Consider the 20 MHz performance limit and the 2.7V to 5.5V operating voltage range. Evaluate the need for the 10-bit ADC and PWM capabilities. The 20-pin QFN package is suitable for space-constrained designs requiring surface mount technology.

Part Context

This part belongs to the ATtiny45 family within the AVR 8-bit microcontroller series. It shares architectural similarities with the ATtiny25 and ATtiny85, differing primarily in memory sizes. The device is manufactured using high-density non-volatile memory technology and supports in-system programming via SPI.

Replacement Considerations

ATtiny45-20MU serves as a direct pin-compatible alternative in the same package type but without the tape and reel suffix. Other members of the ATtiny25/45/85 family may be considered if memory requirements differ, though pinouts and specifications vary slightly between variants.