ATTINY44A-CCUR

Overview

The ATTINY44A-CCUR is an 8-bit AVR microcontroller featuring 4KB of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates on a supply voltage range of 1.8V to 5.5V with maximum clock speeds up to 20MHz at 4.5V–5.5V. The device includes a 10-bit ADC with 8 single-ended and 12 differential channels, two timer/counters with PWM capabilities, and a Universal Serial Interface (USI). It utilizes a 15-ball UFBGA package and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced RISC architecture delivering nearly 1 MIPS per MHz throughput with single-clock cycle instruction execution.
• High endurance non-volatile memory segments supporting 10,000 Flash write/erase cycles and 100,000 EEPROM write/erase cycles.
• On-chip debug system (debugWIRE) enabling in-system programming via SPI port without external debuggers.
• Multiple low-power sleep modes including Idle, ADC Noise Reduction, Standby, and Power-down for optimized energy consumption.

Applications

• Industrial control systems requiring robust I/O handling and programmable logic.
• Low-power sensor interfaces utilizing the integrated 10-bit ADC and analog comparator.
• Consumer electronics employing capacitive touch sensing solutions via QTouch Library compatibility.
• Embedded applications needing secure data storage with programmable lock bits for Flash and EEPROM protection.

Procurement Notes

Verify the specific ordering suffix 'CCUR' against the manufacturer's current datasheet revision DS40002269A to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 15-ball UFBGA configuration. Cross-reference fuse settings and pinout assignments with official documentation before finalizing design implementation.

Selection Notes

Select this component when a balance of moderate program memory and high-speed processing is required within a compact footprint. Consider the 1.8V to 5.5V operating range for flexible power supply designs. Evaluate the availability of the UFBGA package against assembly capabilities, as it requires surface mount technology suitable for fine-pitch components.

Part Context

This part belongs to the ATtiny24A/44A/84A family, which shares a common core architecture but varies in memory sizes. The '44' designation indicates 4KB Flash capacity. The 'A' suffix typically denotes enhanced features or manufacturing revisions compared to previous generations. This series is designed for cost-sensitive applications demanding high performance per watt.

Replacement Considerations

Direct substitutes include other variants within the ATtiny44A family such as ATTINY44A-MU or ATTINY44A-SU, provided the package type matches the design requirements. Verify that any replacement maintains the same speed grade and voltage specifications to ensure functional equivalence.

FAQ

What is the maximum operating frequency at the minimum supply voltage?

At the minimum supply voltage of 1.8V, the maximum operating frequency is 4 MHz.

Does the device support differential ADC inputs?

Yes, the 10-bit ADC supports 12 differential channel pairs with programmable gain stages of 1x or 20x.