ATTINY45-20PU

Overview

The ATTINY45-20PU 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 six programmable I/O lines, a 10-bit ADC with four single-ended channels, two PWM channels, and a Universal Serial Interface (USI). It supports industrial temperature ranges from -40°C to +85°C and utilizes an 8-pin PDIP package.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Non-volatile memory system with high endurance ratings for both program Flash and data EEPROM.
• Integrated analog peripherals including a 10-bit ADC with differential channel pairs and an on-chip analog comparator.
• Multiple power-saving operational modes designed to minimize active and standby current consumption.

Applications

• Battery-powered embedded systems requiring low power consumption
• Simple sensor interface circuits utilizing the integrated ADC
• Basic communication protocols implemented via the USI peripheral
• Consumer electronics control logic

Procurement Notes

Verify that the ordering code matches the specific speed grade and package configuration required for the design. Confirm the lead finish and RoHS compliance status aligns with manufacturing standards. Ensure the component revision corresponds to the intended application requirements regarding known errata conditions.

Selection Notes

Select this model when 4K bytes of program memory are sufficient for the application firmware. Choose the PDIP package if through-hole mounting is necessary for the PCB layout. Verify that the 20 MHz speed grade meets the processing requirements at the target operating voltage.

Part Context

This component belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers manufactured by Microchip Technology. The family shares a common core architecture and peripheral set, differentiated primarily by memory capacities and specific pin configurations across various packages.

Replacement Considerations

ATtiny25-20PU

FAQ

What is the function of the USI peripheral?

The Universal Serial Interface (USI) provides support for standard SPI and I2C communication protocols, allowing the microcontroller to interface with external serial devices.

How does the device handle power-down mode?

In Power-down mode, the register contents are saved while all chip functions are disabled until the next interrupt or hardware reset occurs, minimizing power consumption.