ATTINY44A-MUR

Overview

The ATtiny44A-MUR is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. The device includes twelve programmable I/O lines, an 8-channel 10-bit ADC with programmable gain, two timer/counters with PWM channels, and a Universal Serial Interface. Operating voltages range from 1.8V to 5.5V, supporting speeds up to 20 MHz at 4.5–5.5V. It operates within an industrial temperature range of -40°C to +85°C and is available in a 15-ball UFBGA package.

Feature Summary

• High-performance 8-bit AVR architecture executing most instructions in a single clock cycle for efficient processing.
• Non-volatile memory segments including self-programmable Flash, EEPROM, and SRAM with high endurance ratings.
• Integrated analog peripherals including an 8-channel 10-bit ADC with differential inputs and an on-chip analog comparator.
• Multiple power-saving modes such as Idle, ADC Noise Reduction, Standby, and Power-down to optimize energy consumption.

Applications

• Battery-powered consumer electronics requiring low active and standby current consumption.
• Industrial control systems operating within extended temperature ranges.
• Smart home devices utilizing capacitive touch sensing interfaces via QTouch Library support.
• Embedded applications needing in-system programming via SPI interface.

Procurement Notes

Verify the specific ordering suffix 'MUR' against Microchip's official documentation to confirm the exact package type, lead-free status, and tape-and-reel specifications. Ensure compatibility with your assembly process requirements. Cross-reference the device signature bytes and fuse settings during integration to guarantee correct firmware execution and hardware configuration.

Selection Notes

Select this component when 4K bytes of program memory and 256 bytes each of data memory are sufficient for the application logic. Consider the UFBGA package if board space is limited and automated surface-mount assembly is required. Evaluate the 20 MHz maximum speed requirement against the supply voltage constraints, noting that higher frequencies require voltages above 4.5V.

Part Context

This part belongs to the ATtiny24A/44A/84A family of 8-bit AVR microcontrollers. It shares the same core architecture and peripheral set as the ATtiny24A and ATtiny84A, differing primarily in memory capacities. The family is designed for cost-sensitive applications requiring moderate processing power and extensive I/O capabilities in compact packages.

Replacement Considerations

Direct substitutes within the same family include the ATtiny24A and ATtiny84A, provided memory size adjustments are acceptable. Verify pinout compatibility and software register mappings before substitution. Alternative packages such as SOIC or PDIP may be used if form factor changes are permissible.