ATTINY45-20SUR

Overview

The ATTINY45-20SUR 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 supply voltages ranging from 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-lead 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 support
• Multiple power-saving modes including idle and power-down

Applications

• Battery-powered embedded systems requiring low power consumption
• Simple sensor interfaces utilizing the internal ADC
• Basic control applications using timer and PWM capabilities
• General-purpose logic replacement in compact designs

Procurement Notes

Verify the specific speed grade suffix matches the required operating voltage and frequency range. Confirm the package type corresponds to the design footprint. Check RoHS compliance status if required by manufacturing standards. Ensure the ordering code aligns with the desired lead finish and tape & reel specifications.

Selection Notes

Select this component for applications needing moderate flash capacity within a minimal pin count. Consider the 20 MHz speed grade when designing for higher performance requirements above 2.7V. Evaluate the available I/O lines against peripheral needs such as SPI or USI communication. Review the errata section for potential EEPROM read issues at low voltages.

Part Context

This part belongs to the ATtiny45 family within the broader ATtiny25/45/85 series. It shares the same core architecture and pinout with variants offering different memory sizes. The SUR suffix indicates a tape and reel packaging format suitable for automated assembly processes.

Replacement Considerations

ATtiny45-20SU

FAQ

What is the minimum supply voltage for 20 MHz operation?

The minimum supply voltage for 20 MHz operation is 4.5V.

Does the device support external interrupts?

Yes, it supports external interrupt sources via the INT0 pin.