ATTINY426-XF

Overview

The ATtiny426-XF is an 8-bit microcontroller from the Microchip tinyAVR 2 family, featuring a 20-pin TSSOP package. It integrates 8 KB of Flash memory, 1 KB of SRAM, and 128 B of EEPROM. The device operates at a maximum clock frequency of 20 MHz with a supply voltage range of 1.8 V to 5.5 V. Key peripherals include a 12-bit differential ADC with PGA, two USARTs, SPI, TWI, and an Event System. It supports industrial temperature ranges (-40°C to +85°C) and includes features such as Brown-out Detection (BOD), a Real-Time Counter (RTC), and Configurable Custom Logic (CCL).

Feature Summary

• Integrates a high-performance AVR CPU with hardware multiplier running up to 20 MHz.
• Includes a 12-bit differential ADC with Programmable Gain Amplifier (PGA) for precise analog signal acquisition.
• Features an Event System for CPU-independent inter-peripheral signaling to reduce power consumption.
• Supports flexible communication via dual USARTs, SPI, and TWI interfaces.

Applications

• Industrial control systems requiring low-power operation.
• Sensor nodes utilizing the differential ADC for accurate measurements.
• Battery-powered devices benefiting from multiple sleep modes.
• Automotive applications compatible with AEC-Q100 standards (VAO variants).

Procurement Notes

Verify the specific ordering suffix 'XF' against official Microchip documentation to confirm package type (TSSOP) and temperature grade (Extended -40°C to +125°C). Ensure compatibility with existing board layouts due to the 20-pin form factor. Confirm that the required peripheral count matches the ATtiny426 specifications within the tinyAVR 2 family.

Selection Notes

Select this component when vertical migration within the tinyAVR 2 family is desired without code modification. Choose the ATtiny426 over the ATtiny424 or ATtiny427 based on the specific pin count requirements (20 pins) and available I/O resources. Consider the extended temperature range indicated by the suffix if operating in harsh environments.

Part Context

This part belongs to the tinyAVR 2 family, which offers horizontal and vertical migration capabilities. The ATtiny426 provides a balance between memory size and pin count compared to its siblings, the ATtiny424 (14-pin) and ATtiny427 (24-pin). All devices in this series share the same core architecture and peripheral set, differing primarily in memory capacity and physical package dimensions.

Replacement Considerations

Direct substitutes within the same family include ATtiny424-XF and ATtiny427-XF, provided pin counts are adjusted. Cross-family replacements require careful evaluation of instruction set compatibility and peripheral availability.