ATTINY25-20SSUR

Overview

The ATTINY25-20SSUR is an 8-bit AVR microcontroller featuring 2 KB of in-system programmable Flash memory, 128 bytes of EEPROM, and 128 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz within the industrial temperature range of -40°C to +85°C. The device utilizes an 8-pin SOIC package with a matte tin lead finish and is supplied in tape and reel format. It supports a supply voltage range of 2.7 V to 5.5 V.

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 suite including a 10-bit ADC, dual PWM channels, and Universal Serial Interface (USI).
• Multiple software-selectable power-saving modes designed to minimize active and standby current consumption.

Applications

• Battery-powered embedded systems requiring low power consumption.
• Industrial control applications operating within extended temperature ranges.
• Consumer electronics utilizing the integrated analog-to-digital converter.
• Simple serial communication interfaces via the Universal Serial Interface.

Procurement Notes

Verify that the ordering suffix 'R' corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm the 'U' suffix indicates the matte tin lead finish specification. Ensure the speed grade '20' matches the target operational frequency requirements for the specific supply voltage conditions defined in the datasheet electrical characteristics.

Selection Notes

Select this component when a compact 8-pin footprint is necessary alongside standard industrial temperature capabilities. The 20 MHz speed grade provides sufficient processing performance for time-critical tasks while maintaining compatibility with the broader ATtiny25/45/85 family ecosystem. Consider the availability of development tools and the extensive instruction set for efficient code implementation.

Part Context

This part belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers manufactured by Microchip Technology. It shares the same core architecture and peripheral set as the ATtiny45 and ATtiny85 variants, differing primarily in memory capacities. The family is designed for cost-sensitive applications requiring a balance of processing power and energy efficiency.

Replacement Considerations

ATtiny25-20SU serves as a direct pin-compatible alternative provided in tube packaging rather than tape and reel.

FAQ

What is the function of the 'R' suffix in the part number?

The 'R' suffix indicates that the device is supplied in tape and reel packaging, which is optimized for surface-mount technology assembly equipment.

How does the speed grade affect the operating voltage?

The 20 MHz speed grade requires a supply voltage between 2.7 V and 5.5 V to achieve its maximum clock frequency, whereas lower speed grades may operate at reduced voltages.