ATTINY426-SU

Overview

The ATTINY426-SU 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 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, two USARTs, SPI, TWI, and an Event System. The component is housed in a 20-pin SOIC package and supports industrial temperature ranges.

Feature Summary

• Features a high-performance low-power AVR CPU with single-cycle I/O access and a two-cycle hardware multiplier.
• Includes advanced digital peripherals such as a 16-bit Timer/Counter Type A, Real-Time Counter, and Configurable Custom Logic.
• Provides accurate analog capabilities via a 12-bit differential ADC with Programmable Gain Amplifier and multiple internal voltage references.
• Supports flexible communication through dual USARTs, SPI, and TWI interfaces alongside a dedicated Event System.

Applications

• Industrial control systems requiring precise timing and event-driven operations
• Battery-powered devices utilizing low-power sleep modes and efficient power management
• Sensor interface applications leveraging the high-resolution differential ADC
• Embedded systems needing robust communication protocols like USART and TWI

Procurement Notes

Verify the specific ordering suffix 'SU' corresponds to the 20-pin SOIC package variant. Confirm that the required speed grade aligns with the intended operating voltage and temperature conditions. Ensure compatibility with the UPDI programming interface for development and production flashing. Check for any automotive qualification requirements if the application demands AEC-Q100 compliance.

Selection Notes

Select this model when 8 KB of Flash and 1 KB of SRAM are sufficient for the application logic. Consider the 20-pin form factor for balanced I/O availability and board space constraints. Evaluate the need for the 12-bit ADC resolution and PGA for signal conditioning tasks. Compare against ATtiny424 or ATtiny427 if different pin counts or peripheral sets are preferred.

Part Context

This component belongs to the tinyAVR 2 family, designed for vertical migration without code modification across the series. It shares architectural similarities with other members like the ATtiny424 and ATtiny427 but offers a specific balance of memory and I/O count. The family emphasizes low power consumption and advanced peripheral integration for modern embedded applications.

Replacement Considerations

ATtiny424-SU (14-pin, reduced I/O)

FAQ

What is the maximum operating frequency of the ATTINY426-SU?

The device runs at up to 20 MHz.

Does the ATTINY426-SU support differential ADC inputs?

Yes, it includes a 12-bit differential ADC with a Programmable Gain Amplifier (PGA).

How many general-purpose I/O pins are available on the 20-pin version?

The 20-pin variant provides 18 general-purpose I/O pins.