ATTINY85-20PU

Overview

The ATTINY85-20PU is an 8-bit AVR microcontroller featuring 8 KB of In-System Programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7 V to 5.5 V. The device includes six programmable I/O lines, a 4-channel 10-bit ADC, two PWM channels, and a Universal Serial Interface (USI). It supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• High-performance 8-bit AVR architecture with single-cycle execution for efficient processing.
• Non-volatile memory with high endurance ratings for program flash and data EEPROM.
• Integrated analog-to-digital converter with multiple channel options and programmable gain.
• Supports low-power operation through selectable sleep modes including power-down.

Applications

• Low-cost embedded control systems
• Battery-powered sensor nodes
• Simple user interface controllers
• Basic communication protocol implementations

Procurement Notes

Verify the package type matches the required PCB footprint, specifically the 8-pin PDIP configuration. Confirm the speed grade suffix corresponds to the target operating frequency and voltage requirements. Ensure the component meets RoHS compliance standards if applicable to the manufacturing process. Check for any specific lot traceability requirements mandated by the end product specifications.

Selection Notes

Select this model when a compact solution with moderate program memory is required. The PDIP package facilitates prototyping on breadboards and through-hole assembly. Consider the 20 MHz speed grade only if the application voltage remains within the specified range for that performance level. Evaluate power consumption needs against the available sleep modes for battery-operated designs.

Part Context

This component belongs to the ATtiny family of 8-bit microcontrollers produced by Microchip Technology. It shares architectural similarities with the ATtiny25 and ATtiny45 but offers increased memory capacity. The series is designed for applications requiring small form factors and low power consumption while maintaining sufficient processing capability for basic logic and control tasks.

Replacement Considerations

ATtiny85-10PU: Lower speed grade suitable for reduced power or cost-sensitive applications.

FAQ

What is the maximum operating frequency for the ATTINY85-20PU?

The maximum operating frequency is 20 MHz, provided the supply voltage is between 4.5 V and 5.5 V.

Does the ATTINY85-20PU support in-system programming?

Yes, it supports In-System Programming (ISP) via the SPI port using standard programming protocols.

How many general-purpose I/O lines are available?

The device provides six programmable I/O lines accessible through Port B.