ATTINY44A-SSUR

Overview

The ATTINY44A-SSUR is an 8-bit AVR microcontroller in a 14-pin SOIC package. It features 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. The device operates at speeds up to 20 MHz at 4.5–5.5V, with lower speed grades available for reduced voltages down to 1.8V. Key peripherals include two PWM-capable timers, a 10-bit ADC with differential inputs, an analog comparator, and a Universal Serial Interface (USI). It supports debugWIRE debugging and offers multiple low-power sleep modes.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Integrated non-volatile memory segments including self-programmable Flash and EEPROM with high endurance ratings.
• Comprehensive peripheral set featuring dual timer/counters with PWM, a 10-bit ADC with programmable gain, and USI communication interface.
• Supports on-chip debugging via debugWIRE and in-system programming through the SPI port.

Applications

• Battery-powered embedded systems requiring low power consumption and extended data retention.
• Industrial control applications utilizing the industrial temperature range and robust I/O capabilities.
• Sensor interfaces leveraging the 10-bit ADC with differential channel pairs and programmable gain stages.
• General-purpose logic control using pin change interrupts and versatile timer/PWM outputs.

Procurement Notes

Verify the specific speed grade suffix matches the required operating frequency for the target voltage range. Confirm the SSUR suffix indicates tape and reel packaging if automated assembly is planned. Ensure the industrial temperature rating aligns with environmental specifications. Cross-reference the datasheet revision to confirm fuse bit definitions and errata status before finalizing design implementation.

Selection Notes

Select this component when 4K bytes of program memory and 256 bytes of RAM are sufficient for the application logic. Choose over the ATtiny24A variant if additional I/O lines or memory capacity are needed. Consider the ATtiny84A if larger memory resources are required. This part is suitable for designs needing a balance of processing speed and power efficiency within the 1.8V to 5.5V supply range.

Part Context

The ATTINY44A belongs to the tinyAVR 1-series family, representing an evolution of the classic AVR architecture. It shares core architectural similarities with the ATtiny24A and ATtiny84A, differing primarily in memory sizes and pin counts. The device is manufactured using Microchip's high-density non-volatile memory technology, ensuring reliability and long-term data retention for embedded applications.

Replacement Considerations

Direct functional substitutes within the same package include the ATtiny24A-SSUR and ATtiny84A-SSUR, provided memory requirements are adjusted accordingly. Verify pin compatibility as the core architecture remains consistent across these variants. Check for any specific fuse settings or peripheral configurations that may differ between memory densities.