ATTINY85-20PI

Overview

The ATTINY85-20PI is an 8-bit AVR microcontroller featuring 8K bytes of In-System Programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at a maximum frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes six programmable I/O lines, a 10-bit ADC with four single-ended channels, two 8-bit timers/counters, and a Universal Serial Interface (USI). It supports debugWIRE on-chip debugging and SPI programming.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Integrated non-volatile memory systems including ISP Flash, EEPROM, and internal SRAM with data security lock options.
• Comprehensive peripheral suite featuring multi-channel ADC, analog comparator, and multiple timer/counters with PWM capabilities.

Applications

• Low-power embedded control systems requiring minimal pin count
• Battery-operated devices utilizing low power consumption modes
• Simple serial communication interfaces using the USI module

Procurement Notes

Verify the specific speed grade suffix '20' indicates the 20 MHz operational capability within the 2.7V to 5.5V range. Confirm the 'PI' suffix corresponds to the 8-lead PDIP package type. Ensure the component meets industrial temperature requirements if operating outside standard commercial ranges.

Selection Notes

Select this model when 8KB program memory is required alongside a 20 MHz processing speed. It is suitable for designs needing through-hole mounting via the PDIP package. Consider alternative variants if lower voltage operation or smaller surface-mount packages are necessary for the application constraints.

Part Context

This component belongs to the ATtiny25/45/85 family of low-power CMOS 8-bit microcontrollers. It utilizes Atmel's high-density non-volatile memory technology and is manufactured based on the AVR enhanced RISC architecture. The family shares core functionalities while differing in memory capacities and package options.

Replacement Considerations

ATtiny85-20PU

FAQ

What is the function of the USI module?

The Universal Serial Interface (USI) provides a flexible serial communication interface that can be configured for SPI or I2C protocols.

How does the device handle power-down mode?

In Power-down mode, the device saves register contents and disables all chip functions except external interrupts and hardware reset, minimizing current consumption.