RX-8025NBAA0

Real Time Clock Overview

The Epson RX-8025NBAA0 is a Real-Time Clock (RTC) IC from the RX-8025SA series, manufactured by Epson Timing. It features an I2C bus interface for data communication and supports date formats of YY-MM-DD-day-of-week alongside HH:MM:SS (24-hour) time formats. The device operates within a supply voltage range of 1.7 V to 5.5 V and functions reliably across a temperature range of -40°C to +85°C. Packaged in a SOP-14 surface-mount format, it integrates alarm, calendar, clock, timer interrupt, and watchdog timekeeper functionalities without battery backup switching.

Real Time Clock Feature Summary

• I2C Bus Interface: Standard serial communication protocol for system integration.
• Wide Operating Voltage: Supports 1.7 V to 5.5 V power supply ranges.
• Integrated Functions: Includes alarm, calendar, clock, timer interrupt, and watchdog timekeeper capabilities.
• Industrial Temperature Range: Rated for operation between -40°C and +85°C.

Real Time Clock Applications

• Embedded systems requiring precise timekeeping via I2C.
• Industrial equipment operating in extreme temperature environments.
• Consumer electronics needing integrated calendar and alarm features.

Real Time Clock Procurement Notes

Verify the specific suffix 'NBAA0' against official Epson documentation to confirm pinout and electrical characteristics, as suffixes often denote package or tape-and-reel variations. Ensure compatibility with the host controller's I2C voltage levels given the 1.7V to 5.5V operating range. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Real Time Clock Selection Notes

Select this component when an I2C-connected RTC with industrial temperature ratings (-40°C to +85°C) is required. The wide supply voltage range (1.7V–5.5V) allows flexibility in system design. Verify that the SOP-14 package fits the PCB layout constraints. Confirm if the absence of a battery backup switch meets the application's continuity requirements.

Real Time Clock Part Context

This part belongs to the Epson RX-8025SA series of real-time clocks. The base model RX-8025SA provides the core functionality, while the suffix indicates specific manufacturing or packaging details. It is categorized under Clock & Timer ICs and is designed for applications requiring accurate time and date tracking with minimal external components.

Real Time Clock Replacement Considerations

Direct substitutes may include other I2C RTCs with similar voltage and temperature specs, such as those from NXP or STMicroelectronics. However, pin-to-pin compatibility must be verified. The RX-8025SA:AA0 is listed as an alias, suggesting potential interchangeability depending on the specific suffix requirements.