ATTINY45-20PI

Overview

The ATtiny45-20PI is an 8-bit microcontroller based on the AVR enhanced RISC architecture, manufactured by Microchip Technology. It features 4K bytes of In-System Programmable Flash memory, 256 bytes of EEPROM, and 256 bytes of internal SRAM. The device operates with a maximum clock frequency of 20 MHz at supply voltages between 2.7V and 5.5V. It includes a 10-bit ADC with four single-ended channels, two PWM channels, and six programmable I/O lines.

Feature Summary

• High-performance 8-bit AVR core executing most instructions in a single clock cycle
• Non-volatile memory with high endurance for Flash and EEPROM
• Integrated analog-to-digital converter with differential channel pairs
• On-chip debug system supporting in-system programming via SPI

Applications

• Low-power sensor applications
• Real-time control systems
• Simple program execution environments

Procurement Notes

Verify that the ordering code matches the required speed grade and voltage range. Confirm the package type corresponds to the 8-lead Plastic Dual Inline Package (PDIP). Ensure compliance with RoHS directives if lead-free packaging is specified. Check operational temperature ranges against industrial requirements.

Selection Notes

Select this component when 4K bytes of Flash memory are sufficient for the application logic. Choose the PDIP package for through-hole mounting requirements. Consider the 20 MHz speed grade for operation within the 2.7V to 5.5V supply range. Evaluate power consumption needs against active and power-down modes.

Part Context

This part belongs to the ATtiny25/45/85 family of low-power CMOS 8-bit microcontrollers. The family shares a common architecture but differs in memory sizes. The ATtiny45 variant provides a balance between processing capability and resource availability for cost-sensitive embedded designs.

Replacement Considerations

ATtiny25-20PI offers similar functionality with reduced memory capacity. ATtiny85-20PI provides increased memory while maintaining the same pinout and peripheral set.