ATTINY426-XFR

Overview

The ATTINY426-XFR is an 8-bit microcontroller from the Microchip tinyAVR 2 family, utilizing the AVR CPU with a hardware multiplier. It features 8 KB of In-System self-programmable Flash memory, 1 KB of SRAM, and 128 B of EEPROM. The device operates at a maximum frequency of 20 MHz within a supply voltage range of 1.8 V to 5.5 V. It includes a 12-bit differential ADC with PGA, up to 15 input channels, two USARTs, SPI, and TWI interfaces. The XFR suffix indicates a TSSOP/SSOP package in Tape & Reel format, rated for extended temperature operation from -40°C to +125°C.

Feature Summary

• High-performance low-power architecture with single-cycle I/O access and vectored interrupts
• Integrated Event System for CPU-independent peripheral signaling
• Configurable Custom Logic (CCL) with programmable Look-Up Tables
• Single-pin Unified Program and Debug Interface (UPDI)

Applications

• Industrial control systems requiring robust analog sensing
• Battery-powered devices utilizing low-power sleep modes
• Sensor nodes using event-driven architectures
• Automotive applications meeting AEC-Q100 qualification standards

Procurement Notes

Verify that the specific part number corresponds to the correct package variant and temperature grade. Confirm the presence of the 'X' designation for TSSOP/SSOP packaging and 'R' for tape and reel delivery. Ensure compatibility with existing design tools and programming interfaces before finalizing procurement orders.

Selection Notes

Select this component when 8 KB of program memory and 1 KB of data RAM are required alongside extensive analog capabilities. The 20-pin form factor provides sufficient I/O for complex peripheral integration. Consider the extended temperature range if the application environment exceeds standard industrial limits.

Part Context

This device belongs to the tinyAVR 2 family, which offers vertical migration compatibility with other members of the series without code modification. It shares architectural similarities with the ATtiny424 and ATtiny427 but distinguishes itself through its specific pin count and memory configuration within the 20-pin package lineup.

Replacement Considerations

Direct substitutes include other variants within the ATtiny424/426/427 family, such as the ATtiny424 or ATtiny427, provided pin counts and memory sizes align with the design requirements. Cross-family replacements require careful evaluation of instruction set compatibility and peripheral availability.