ATTINY44-20SSUR

Overview

The ATTINY44-20SSUR 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 up to 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes one 8-bit and one 16-bit Timer/Counter with PWM channels, a 10-bit ADC with 8 single-ended and 12 differential input channels, and an on-chip analog comparator. Communication interfaces include SPI and Universal Serial Interface.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput
• Non-volatile memory segments with high endurance for Flash and EEPROM data retention
• Integrated peripheral features including timers, counters, ADC, and programmable watchdog timer
• Supports low power consumption through multiple software-selectable sleep modes

Applications

• In-system programming via SPI port
• On-chip debug system using debugWIRE interface
• Industrial temperature range applications (-40°C to +85°C)

Procurement Notes

Verify the specific ordering code matches the required speed grade and package type. Confirm that the 'R' suffix indicates tape and reel packaging if applicable. Ensure the component complies with RoHS directives and verify the operational voltage range aligns with the target system design requirements before procurement.

Selection Notes

Select this model for designs requiring 4K Flash memory and 20 MHz operation within the 2.7V to 5.5V range. Consider the 14-pin SOIC package for space-constrained PCB layouts. Evaluate the available I/O lines and ADC channels against application signal requirements to ensure sufficient peripheral resources are utilized.

Part Context

This component belongs to the ATtiny24/44/84 family of 8-bit AVR microcontrollers manufactured by Microchip Technology. The family shares a common enhanced RISC core architecture but varies in memory sizes and pin counts. The ATTINY44 variant specifically provides a balance of processing capability and peripheral integration suitable for general-purpose control tasks.

Replacement Considerations

ATtiny44-20SSU (Same speed/package, different packaging format)

FAQ

What is the maximum operating frequency for the ATTINY44-20SSUR?

The device supports a maximum clock frequency of 20 MHz when operating within the 2.7V to 5.5V supply voltage range.

Does the ATTINY44 support in-system programming?

Yes, the program memory can be re-programmed in-system through an SPI serial interface.