ATTINY25-20SSNR

Overview

The ATTINY25-20SSNR is an 8-bit AVR microcontroller from Microchip Technology, featuring a 20 MHz speed grade and operating within a 2.7V to 5.5V voltage range. It utilizes the S8S1 package variant of the 8-pin SOIC form factor with tape-and-reel packaging indicated by the 'R' suffix. The device includes 2 KB of in-system programmable Flash memory, 128 bytes of EEPROM, and 128 bytes of internal SRAM. Key peripherals include a 4-channel 10-bit ADC, USI for SPI/I2C communication, two 8-bit timers/counters, and an on-chip analog comparator.

Feature Summary

• Executes powerful RISC instructions in a single clock cycle for efficient processing.
• Supports in-system programming via the SPI port for flexible firmware updates.
• Integrates multiple power-saving modes including Idle, Power-down, and ADC Noise Reduction.
• Features debugWIRE on-chip debugging capabilities for development and testing.

Applications

• Embedded control systems requiring low power consumption
• Battery-operated devices utilizing efficient sleep modes
• Industrial applications within the specified temperature range

Procurement Notes

Verify that the ordering suffix matches the required specifications. Confirm the package type corresponds to the S8S1 JEDEC SOIC standard. Ensure the speed grade aligns with the target system clock requirements. Check RoHS compliance status if environmental regulations apply. Validate the manufacturing date code against project timelines.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required. Consider the 2 KB Flash capacity for application size constraints. Evaluate the 6 available I/O lines against interface needs. Verify compatibility with existing SPI or I2C protocols using the USI peripheral. Assess thermal management requirements for the industrial temperature range.

Part Context

This part belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers. It shares architectural similarities with the ATtiny45 and ATtiny85, differing primarily in memory sizes. The series is designed for cost-sensitive embedded applications requiring reliable performance and extensive peripheral integration within a compact footprint.

Replacement Considerations

ATtiny25-20SSU serves as a tube-packaged alternative with identical electrical characteristics. ATtiny25-20SUR offers the same functionality in a different reel configuration. Cross-reference pinouts and memory maps when substituting with other members of the ATtiny series.