ATTINY44A-MU

Overview

The ATTINY44A-MU is an 8-bit AVR microcontroller featuring a 20-pin WQFN/VQFN package. It includes 4KB of In-System Programmable Flash, 256 bytes of EEPROM, and 256 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 two timer/counters with PWM channels, a 10-bit ADC with differential inputs, an analog comparator, and a Universal Serial Interface (USI).

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput.
• Non-volatile memory segments with high endurance ratings for Flash and EEPROM data retention.
• Integrated peripheral suite including timers, ADC with programmable gain, and debugWIRE debugging system.
• Multiple low-power sleep modes allowing optimization of power consumption versus processing speed.

Applications

• In-system programming via SPI port for firmware updates.
• Capacitive touch sensing interfaces using QTouch Library integration.
• On-chip temperature sensor monitoring applications.
• General digital I/O control with pin change interrupts.

Procurement Notes

Verify the specific ordering suffix corresponds to the 20-pin WQFN/VQFN package variant. Confirm industrial temperature range requirements align with the -40°C to +85°C specification. Ensure compatibility with 1.8V to 5.5V operating voltages for the target application environment.

Selection Notes

Select this component for designs requiring a balance of processing speed and low power consumption. The 20-pin package suits space-constrained surface-mount applications. Consider the 4KB Flash capacity for code size requirements and verify that the 12 available I/O lines meet interface needs.

Part Context

This part belongs to the ATtiny24A/44A/84A family of low-power CMOS 8-bit microcontrollers. It shares the same core architecture and peripheral set as other members in the series, differentiated primarily by memory sizes and package options. The 'MU' suffix specifically denotes the 20-pin WQFN/VQFN form factor.

Replacement Considerations

Check for ATTINY44A variants with different packages such as PDIP or SOIC if leaded or through-hole mounting is required. Verify electrical characteristics against ATTINY44A non-'A' versions for backward compatibility.

FAQ

What is the maximum operating frequency?

The device supports operation up to 20 MHz when powered between 4.5V and 5.5V.

Does the device support on-chip debugging?

Yes, it features a debugWIRE on-chip debug system accessible via the RESET pin.