ATTINY424-SSU

Overview

The ATTINY424-SSU is an 8-bit AVR microcontroller from the tinyAVR 2 family, manufactured by Microchip Technology. It features a 14-pin SOIC package with 4 KB of Flash memory, 512 bytes of SRAM, and 128 bytes of EEPROM. The device operates at a maximum frequency of 20 MHz within a supply voltage range of 1.8V to 5.5V and supports an industrial temperature range of -40°C to +85°C. Key peripherals include a 12-bit differential ADC with PGA, two USARTs, SPI, TWI, and a hardware multiplier.

Feature Summary

• Features a high-performance low-power AVR CPU with a two-cycle hardware multiplier and single-cycle I/O access for efficient processing up to 20 MHz.
• Incorporates advanced analog capabilities including a 12-bit differential ADC with Programmable Gain Amplifier (PGA) and multiple internal voltage references.
• Supports flexible inter-peripheral signaling through an Event System and Configurable Custom Logic (CCL) with four programmable Look-Up Tables.
• Provides comprehensive communication interfaces including dual USARTs with auto-baud, host/client SPI, and TWI with dual address match.

Applications

• Battery-powered sensor nodes requiring low power consumption and precise analog signal acquisition.
• Industrial control systems utilizing the robust peripheral set and wide operating temperature range.
• Smart home devices leveraging the integrated event system for efficient, CPU-independent task handling.
• Embedded applications needing reliable data logging via EEPROM and secure code execution in Flash.

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating. Ensure compatibility with existing design constraints regarding pin count and memory requirements. Confirm that the procurement channel provides genuine Microchip products to avoid counterfeit risks. Check for any specific automotive or extended temperature variants if operating conditions exceed standard industrial limits.

Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral integration is required in a compact 14-pin form factor. Consider the tinyAVR 2 architecture for projects benefiting from the hardware multiplier and advanced analog features like the differential ADC. Evaluate the vertical migration path within the tinyAVR 2 family if future scalability in terms of pins or memory is anticipated without code modification.

Part Context

This device belongs to the tinyAVR 2 family, which represents a modern evolution of Microchip's 8-bit AVR architecture. It shares architectural similarities with other members like the ATtiny824 but offers reduced pin count and memory suitable for cost-sensitive applications. The family emphasizes low power, high performance, and ease of use through unified programming and debug interfaces.

Replacement Considerations

Direct pin-compatible replacements within the same family include the ATtiny426 and ATtiny427, which offer increased I/O and memory. For legacy designs, older ATtiny series devices may serve as functional substitutes but require significant schematic and firmware modifications due to architectural differences.

FAQ

["What is the maximum operating frequency of the ATTINY424-SSU?","The maximum operating frequency is 20 MHz, dependent on the supply voltage and temperature conditions."]

["Does the ATTINY424-SSU support external interrupts on all pins?","Yes, the device supports external interrupts on all general-purpose I/O pins."]

["What analog-to-digital conversion capabilities are included?","It includes a 12-bit differential ADC with a Programmable Gain Amplifier (PGA) and up to 9 input channels."]