ATTINY45-20SHR

Overview

The ATTINY45-20SHR is an 8-bit AVR microcontroller featuring 4K bytes of In-System Programmable Flash, 512 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 a 10-bit ADC with four single-ended channels, two PWM channels, and a Universal Serial Interface (USI). It is housed in an 8-lead SOIC package with NiPdAu lead finish and supplied in tape and reel packaging.

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 programmable gain options
• Multiple power-saving modes including Idle, ADC Noise Reduction, and Power-down

Applications

• Battery-powered embedded systems requiring low power consumption
• Industrial control applications utilizing the industrial temperature range
• Sensor interfaces leveraging the internal ADC and analog comparator
• Communication modules using the USI for SPI or I2C protocols

Procurement Notes

Verify the specific ordering code ATTINY45-20SHR against current Microchip Technology documentation to confirm availability and manufacturing status. Ensure that the NiPdAu lead finish and tape & reel packaging requirements align with your assembly process specifications before finalizing procurement orders.

Selection Notes

Select this component when 4K bytes of flash memory and 256 bytes of SRAM are required within an 8-pin surface-mount package. The 20 MHz speed grade supports higher processing throughput compared to lower speed variants. Consider the industrial temperature range suitability for environments exceeding standard commercial limits.

Part Context

This part belongs to the ATtiny45 family within the broader AVR 8-bit microcontroller portfolio. It shares architectural similarities with the ATtiny25 and ATtiny85, differing primarily in memory capacities. The device utilizes the enhanced RISC core common to the series, offering efficient code execution and flexible peripheral configurations for compact designs.

Replacement Considerations

Compatible substitutes include ATTINY45-20SU and ATTINY45-20SUR, which share identical electrical characteristics but differ in lead finish or packaging format. Verify pin compatibility and memory specifications when transitioning between these variants.