RX-4045NB:AAB

Real Time Clock Overview

The Epson RX-4045NB:AAB is a real-time clock (RTC) module belonging to the RX-4045SA series. It provides precise timekeeping functions via I2C and SPI serial interfaces, supporting both 2-wire and 4-wire configurations. The device operates within a supply voltage range of 1.6 V to 5.5 V and maintains functionality across an industrial temperature range of -40°C to +85°C. Key features include configurable date formats (YY-MM-DD) and time formats (HH:MM:SS in 12-hour or 24-hour modes). The component offers storage capacities of 8 B, 16 B, or 256 B depending on the specific variant configuration. It is designed for surface mount installation using SOP-14 or VSOJ-12 packages, ensuring reliable integration into compact electronic systems requiring accurate timestamping.

Real Time Clock Feature Summary

• Dual interface support for I2C and SPI (2-wire/4-wire) communication protocols
• Wide operating voltage range from 1.6 V to 5.5 V
• Industrial temperature stability from -40°C to +85°C
• Configurable date and time formats with reset capabilities

Real Time Clock Applications

• Data logging systems requiring precise timestamping
• Industrial control equipment needing reliable time synchronization
• Embedded devices with limited power consumption constraints

Real Time Clock Procurement Notes

Verify the exact suffix and package type (SOP-14 or VSOJ-12) against the specific application requirements. Confirm the required storage capacity (8 B, 16 B, or 256 B) as this may vary within the RX-4045SA family. Ensure compatibility with the host system's I2C or SPI voltage levels before integration.

Real Time Clock Selection Notes

Select this RTC when both I2C and SPI interfaces are needed for flexibility in system design. Choose based on the required operating temperature range (-40°C to +85°C) and voltage supply (1.6 V–5.5 V). Consider the physical footprint constraints when deciding between SOP-14 and VSOJ-12 packages.

Real Time Clock Part Context

This component is part of Epson's RX-4045SA series of real-time clocks. It shares core functionalities with other models in the series, such as the RX-4035LC and RX-4571LC, but is distinguished by its specific interface options and package availability. The series is known for low power consumption and high accuracy in timekeeping applications.

Real Time Clock Replacement Considerations

Direct substitutes within the same series include the RX-4045SA model. Verify pin compatibility and software register settings when replacing with other Epson RTCs like the RX-4035LC or RX-4571LC, as interface and package differences may exist.