ATTINY25-20PU

Overview

The ATtiny25-20PU is an 8-bit AVR microcontroller featuring a 2 KB In-System Programmable Flash memory, 128 bytes of EEPROM, and 128 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7 V to 5.5 V. 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 (USI). It utilizes an 8-pin PDIP package.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Non-volatile memory with high endurance ratings for both program Flash and data EEPROM.
• Integrated analog features including a 10-bit ADC and an on-chip analog comparator.
• Supports multiple low-power sleep modes to optimize energy consumption during idle periods.

Applications

• Battery-powered consumer electronics requiring low power consumption
• Simple serial communication interfaces using the USI peripheral
• Basic sensor interfacing utilizing the internal ADC

Procurement Notes

Verify the specific speed grade suffix matches the required operating frequency and voltage range. Confirm the package type corresponds to the intended PCB layout. Check for any manufacturer notices regarding recommended design-in status or lifecycle changes before finalizing procurement plans.

Selection Notes

Select this component when a compact 8-bit solution with minimal I/O requirements is needed. Ensure the application does not exceed the 20 MHz speed limit at the target supply voltage. Consider the 6 I/O constraint and available peripherals like the USI and ADC against project specifications.

Part Context

This part belongs to the ATtiny25/45/85 family of 8-bit AVR microcontrollers. It shares the same core architecture and pinout as higher-memory variants within the series, differing primarily in Flash and EEPROM capacity. The '20' indicates the 20 MHz speed grade, while 'PU' denotes the 8-lead PDIP package.

Replacement Considerations

ATtiny45-20PU and ATtiny85-20PU are direct pin-compatible upgrades offering increased memory. For lower-speed requirements, ATtiny25V-10PU provides extended voltage operation down to 1.8 V.