ATTINY44-20PU

Overview

The ATtiny44-20PU is an 8-bit AVR microcontroller featuring 4KB of in-system programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates at speeds up to 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes two 8-bit timers/counters with PWM channels, an 8-channel 10-bit ADC, and a USI for serial communication. Packaged in a 14-pin PDIP, it supports debugWIRE programming and offers multiple low-power sleep modes.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle
• Non-volatile memory with high endurance Flash and EEPROM
• Integrated analog-to-digital converter with temperature measurement capability
• Supports in-system programming via SPI and debugWIRE interface

Applications

• General-purpose embedded control systems
• Sensor interfacing and data acquisition
• Low-power battery-operated devices
• Simple motor control applications using PWM

Procurement Notes

Verify the manufacturer part number matches exactly ATTINY44-20PU to ensure correct speed grade and package type. Confirm the datasheet version aligns with current Microchip specifications. Check for any specific environmental certifications required for your application. Ensure compatibility with existing programming tools such as ISP programmers or debugWIRE interfaces before procurement.

Selection Notes

Select this component when a balance of processing speed and pin count is required within a small footprint. The 14-pin DIP package facilitates prototyping on breadboards. Consider the 20MHz maximum frequency for timing-critical tasks. Evaluate power consumption requirements against the available sleep modes if battery life is a constraint. Compare peripheral needs like ADC channels against other ATtiny variants.

Part Context

This part belongs to the ATtiny44 family within the AVR microcontroller portfolio. It shares architectural similarities with ATtiny24 and ATtiny84, differing primarily in memory size. The -20 suffix indicates a 20MHz speed grade, while PU denotes the 14-pin PDIP package. It is designed for cost-sensitive applications requiring reliable 8-bit processing capabilities.

Replacement Considerations

ATtiny44A-20PU is a direct functional replacement with potential minor specification updates. Verify pinout compatibility and software register mappings before substitution. Other ATtiny series members may require hardware modifications due to different pin counts or peripheral configurations.