ATTINY25-20SN

Overview

The ATTINY25-20SN is an 8-bit AVR microcontroller featuring a high-performance RISC architecture with 120 instructions, most executing in a single clock cycle. It integrates 2 KB of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. The device supports a maximum clock frequency of 20 MHz at supply voltages between 4.5 V and 5.5 V, operating within the industrial temperature range of -40°C to +105°C. It utilizes an 8-lead SOIC package.

Feature Summary

• Advanced RISC core delivering near 1 MIPS per MHz throughput for optimized power-speed balance
• Non-volatile memory with 10,000 Flash write/erase cycles and 100,000 EEPROM write/erase cycles
• Integrated Universal Serial Interface (USI) supporting SPI and I2C compatible communication protocols
• Four-channel 10-bit Analog-to-Digital Converter (ADC) with programmable gain options

Applications

• Industrial control systems requiring robust operation across extended temperature ranges
• Battery-powered embedded devices utilizing low-power idle and power-down modes
• Sensor interface modules leveraging the integrated ADC and analog comparator
• General-purpose logic replacement in cost-sensitive consumer electronics

Procurement Notes

Verify the specific ordering suffix 'SN' against the manufacturer's current datasheet to confirm the package type and lead finish specifications. Ensure the procurement channel provides traceability documentation consistent with Microchip Technology standards. Confirm that the delivered components match the specified industrial temperature grade and voltage requirements for the target application environment.

Selection Notes

Select this component when a compact 8-pin footprint is required alongside 2 KB of program memory. The 20 MHz speed grade is suitable for applications needing higher processing speeds at standard 5V logic levels. Consider the ATtiny25V variant if the design operates below 2.7V or requires lower clock frequencies at reduced voltages. Evaluate the USI peripheral sufficiency before selecting over devices with dedicated USART interfaces.

Part Context

This device 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, differentiated primarily by non-volatile memory capacity. The series is designed for applications demanding high code efficiency and low power consumption in small form factors.

Replacement Considerations

ATtiny25-20SU: Identical electrical specifications and functionality; differs only in package style (SOIC vs. potentially other variants depending on suffix interpretation). ATtiny25V-20SN: Lower voltage operation capability (1.8V minimum); verify voltage compatibility.