ATTINY25-20SSH

Overview

The ATTINY25-20SSH is an 8-bit AVR microcontroller from Microchip Technology, utilizing the enhanced RISC architecture. It features 2 KB of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. The device operates at a maximum frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. It includes a 4-channel 10-bit ADC, USI interface, two PWM channels, and an on-chip debug system. The component is housed in an 8-lead SOIC package (JEDEC) with a NiPdAu lead finish.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Integrated non-volatile memory with programming lock capabilities for data security.
• Supports in-system programming via SPI port and includes an on-chip debugWIRE system.
• Features multiple power-saving modes including Idle, Power-down, and ADC Noise Reduction.

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 the ordering code suffix 'H' indicates a NiPdAu lead finish as per manufacturer documentation. Confirm the package type corresponds to the S8S1 JEDEC SOIC specification. Ensure the speed grade matches the required operational frequency for the target voltage range. Check for specific revision letters if legacy compatibility is required.

Selection Notes

Select this model when 2 KB of program memory is sufficient for the application logic. Choose the SSH variant specifically for the JEDEC SOIC footprint and NiPdAu termination. Consider the ATtiny25V series if operation below 2.7V is necessary. Verify that the 6 general-purpose I/O lines meet the pin count requirements.

Part Context

This component belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers. It shares the same core architecture and peripheral set as the ATtiny45 and ATtiny85, differing primarily in memory capacity. The family is designed for cost-sensitive embedded applications requiring a balance of performance and power efficiency.

Replacement Considerations

ATtiny25-20SSU serves as a direct alternative with matte tin leads instead of NiPdAu. ATtiny25-20SU offers the standard EIAJ SOIC package. For lower voltage operation, the ATtiny25V-20SSH variant supports 1.8V to 5.5V input ranges.