ATTINY44A-MFR

Overview

The ATTINY44A-MFR is an 8-bit AVR microcontroller featuring a 20-pin WQFN/VQFN package. It includes 4 KB of in-system programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. The device operates with a maximum clock frequency of 20 MHz and supports an operating voltage range of 1.8 V to 5.5 V. It provides 12 general-purpose I/O lines, a 10-bit ADC with 8 single-ended channels, two timer/counters with PWM capabilities, and a Universal Serial Interface (USI).

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput.
• Non-volatile memory segments with high endurance for Flash and EEPROM data retention.
• Integrated analog-to-digital converter with programmable gain for differential channel pairs.
• On-chip debug system allowing in-system programming via SPI interface.

Applications

• Low-power embedded control systems requiring industrial temperature stability.
• Applications utilizing capacitive touch sensing interfaces via QTouch Library.
• Systems requiring on-chip temperature measurement and monitoring.
• Devices needing in-system re-programmable Flash for field updates.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 20-pin WQFN/VQFN configuration. Cross-reference fuse settings and lock bits if migrating from previous ATtiny revisions. Confirm that the supply voltage range aligns with the target application's power requirements.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required within an 8-bit AVR ecosystem. Consider the 20 MHz speed grade relative to the operating voltage to ensure stable performance. Evaluate the available I/O lines and peripheral count against system connectivity needs. Verify that the industrial temperature range meets environmental specifications.

Part Context

This part belongs to the ATtiny24A/44A/84A family of low-power CMOS 8-bit microcontrollers. These devices are based on the AVR enhanced RISC architecture and are manufactured using Microchip's high-density non-volatile memory technology. The family shares common core features while differing in memory sizes and pin counts.

Replacement Considerations

Direct substitutes within the same family include the ATtiny24A and ATtiny84A variants, subject to memory and pin compatibility checks. Verify electrical characteristics and package dimensions before substitution.