ATTINY45-20SU

Overview

The ATTINY45-20SU is an 8-bit AVR microcontroller featuring 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes a 10-bit ADC with four single-ended channels, two high-frequency PWM outputs, and six programmable I/O lines. It utilizes an 8-pin SOIC package.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle
• Non-volatile memory with high endurance for program and data storage
• Integrated analog-to-digital converter with differential channel pairs
• On-chip debug system supporting in-system programming via SPI

Applications

• Battery-powered embedded systems requiring low power consumption
• Simple control applications utilizing the integrated timer and PWM features
• Sensor interfacing using the built-in ADC and analog comparator
• Industrial environments operating within the specified temperature range

Procurement Notes

Verify that the ordering suffix SU corresponds to the 8-lead Plastic Gull-Wing Small Outline (EIAJ SOIC) package as defined in the official Microchip ordering guide. Confirm the speed grade matches the required operational frequency for your specific voltage conditions. Ensure compliance with RoHS directives if applicable to your manufacturing process. Cross-reference the manufacturer part number with authorized distributors to validate authenticity.

Selection Notes

Select this component when 4K bytes of Flash memory is sufficient for the application logic. Choose the 20MHz speed grade if higher processing throughput is needed compared to the 10MHz variant. The SOIC package is suitable for surface mount assembly processes. Consider the ATtiny45V series if operation below 2.7V is required, as the standard version does not support voltages under that threshold.

Part Context

This device belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers manufactured by Microchip Technology. The family shares a common core architecture but differs in memory sizes. The ATTINY45 specifically provides a middle-ground memory capacity between the 2K byte ATtiny25 and the 8K byte ATtiny85, offering a balance of performance and resource availability for compact designs.

Replacement Considerations

ATtiny45-20PU: Identical electrical specifications and functionality, differing only in the 8-lead PDIP package type instead of SOIC.