ATTINY44A-SSN

Overview

The ATTINY44A-SSN is an 8-bit AVR microcontroller featuring 4KB of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates within a voltage range of 1.8V to 5.5V and supports clock speeds up to 20MHz at the upper voltage limit. The device includes a 10-bit ADC with 8 single-ended channels and programmable gain for differential pairs, alongside two timer/counters with PWM capabilities. It utilizes a 14-pin SOIC package and supports industrial temperature ranges.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle
• Non-volatile memory segments with high endurance ratings for Flash and EEPROM
• Integrated analog-to-digital converter with differential input support
• On-chip debug system and universal serial interface

Applications

• Low-power embedded control systems
• Sensor interface circuits requiring ADC conversion
• Industrial applications operating within specified temperature ranges

Procurement Notes

Verify the specific speed grade suffix corresponds to the required operational frequency for your voltage conditions. Confirm the SSN packaging designation matches the intended surface-mount footprint. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the datasheet revision to confirm feature availability.

Selection Notes

Select this model when 4KB program memory and 256 bytes of data storage are sufficient. Choose the SOIC package for standard surface-mount assembly needs. Consider the 20MHz maximum speed if operating at voltages above 4.5V. Evaluate power consumption requirements against the available sleep modes for battery-operated designs.

Part Context

This component belongs to the ATtiny24A/44A/84A family of low-power CMOS 8-bit microcontrollers. The family shares a common enhanced RISC core architecture but differs in memory capacities. The ATTINY44A variant specifically provides intermediate memory resources between the 2K and 8K byte options.

Replacement Considerations

ATtiny44A-PU

FAQ

What is the function of the PB3 pin?

PB3 serves as the RESET input. It can be configured as a general I/O pin by programming the RSTDISBL fuse.

How does the ADC handle differential inputs?

The ADC supports 12 differential channel pairs with a programmable gain stage that can be set to 1x or 20x.