ATTINY25-20MFR

Overview

The ATtiny25-20MFR is an 8-bit AVR microcontroller featuring 2K bytes of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. It operates at speeds up to 20 MHz within a 4.5V to 5.5V supply range. 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. It supports industrial temperature ranges from -40°C to +125°C and utilizes a 20-pad QFN/MLF 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 peripheral set including timers, counters, analog-to-digital converter, and serial interface.
• Multiple power-saving modes including Idle, ADC Noise Reduction, and Power-down.

Applications

• Industrial control systems requiring robust operation across extended temperature ranges
• Battery-powered devices utilizing low-power consumption modes
• Sensor interfaces leveraging the integrated 10-bit ADC and analog comparator
• Communication nodes using the Universal Serial Interface (USI)

Procurement Notes

Verify the specific ordering code ATtiny25-20MFR against current Microchip Technology documentation to confirm availability and revision status. Ensure compatibility with the required 20-pad QFN/MLF footprint and soldering specifications. Confirm that the industrial temperature rating (-40°C to +125°C) meets the environmental requirements of the target application before finalizing procurement.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required within a compact form factor. The 20 MHz speed grade at higher voltages suits applications needing faster instruction execution. Consider the 20-pad QFN package for space-constrained designs. Evaluate the need for the specific 2K Flash and 128-byte EEPROM sizes relative to application memory demands.

Part Context

This part belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers manufactured by Microchip Technology (formerly Atmel). These devices share a common core architecture and peripheral set, differing primarily in memory capacities. The ATtiny25 represents the entry-level variant with 2K bytes of Flash memory, designed for cost-sensitive applications requiring basic control and monitoring capabilities.

Replacement Considerations

Direct substitutes include other members of the ATtiny25/45/85 family such as ATtiny45 or ATtiny85, provided memory requirements are met. Cross-referencing with ATtiny25V variants is necessary if lower voltage operation is needed, though electrical characteristics differ. Verify pinout compatibility and software register mappings when considering alternative packages or speed grades within the same series.