ATTINY44-20SSU

Overview

The ATtiny44-20SSU 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 speeds 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 two PWM channels each, a 10-bit ADC with 8 single-ended and 12 differential channel pairs, and an on-chip analog comparator. It provides 12 programmable I/O lines in a 14-pin SOIC package.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Integrated non-volatile memory systems including ISP Flash, EEPROM, and SRAM with data retention capabilities.
• Comprehensive peripheral set featuring dual timer/counters with PWM, multi-channel ADC with programmable gain, and analog comparator.
• Supports low-power operation through multiple software-selectable sleep modes and fully static operation.

Applications

• Battery-powered embedded systems requiring low power consumption
• Industrial control applications within the industrial temperature range
• Sensor interface circuits utilizing the integrated ADC and analog comparator

Procurement Notes

Verify the specific ordering code matches the required speed grade and voltage range. Confirm the package type corresponds to the design requirements. Check for any applicable RoHS compliance documentation. Ensure the component revision aligns with project specifications regarding known errata.

Selection Notes

Select this model when 4K Flash memory and 12 general-purpose I/O lines are required. Choose the 20MHz speed grade for operations between 2.7V and 5.5V. Consider the V-version variants if operation down to 1.8V is necessary. Verify package availability against PCB layout constraints.

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 core architecture and peripheral set, differentiated primarily by memory sizes and pin counts. The ATtiny44 variant offers a balanced configuration of resources suitable for mid-range embedded applications.

Replacement Considerations

ATtiny44V-20SSU: Offers extended low-voltage operation down to 1.8V while maintaining the 20MHz speed grade and identical package.

FAQ

What is the maximum operating frequency for the ATtiny44-20SSU?

The ATtiny44-20SSU supports a maximum operating frequency of 20 MHz when powered between 2.7V and 5.5V.

How many general-purpose I/O lines does this device provide?

The device provides twelve programmable I/O lines distributed across Port A and Port B.