RX8130CE:BB

Real Time Clock Overview

The EPSON RX8130CE:BB is a real-time clock module featuring an integrated I2C bus interface and a built-in 32.768 kHz crystal unit. It operates within a supply voltage range of 1.25 V to 5.5 V, with a typical standby current of 300 nA at 3 V. The device supports date formats including YY-MM-DD-dd and time formats in HH:MM:SS (24-hour). It includes a backup switching function and integrates a battery charge control circuit. The module provides alarm functions, timer interrupts, and a reset output pin, designed for applications requiring precise timekeeping with minimal power consumption.

Real Time Clock Feature Summary

• Integrated 32.768 kHz crystal unit with factory calibration
• Low standby current of 300 nA (typical) at 3 V
• Built-in battery backup switching and charge control
• I2C bus interface supporting standard and fast modes

Real Time Clock Applications

• Laptop computers and mobile devices
• Industrial control systems
• Consumer electronics with battery backup requirements

Real Time Clock Procurement Notes

Verify the specific suffix :BB against official Epson documentation to confirm packaging or tape-and-reel specifications. Ensure compatibility with the target system's I2C voltage levels and check for any regional distribution restrictions before ordering.

Real Time Clock Selection Notes

Select this component when space constraints preclude external crystals and low power consumption is critical. The integrated calibration reduces design complexity compared to discrete RTC solutions. Verify that the required accuracy meets the application's temperature drift specifications, as digital offset registers may be needed for wide-temperature operation.

Real Time Clock Part Context

The RX8130CE series belongs to Epson's family of compact real-time clock modules. It is designed to replace traditional RTC chips requiring external oscillators, offering a smaller footprint and simplified board layout. The module is commonly used in portable electronics where battery life and size are primary design drivers.

Real Time Clock Replacement Considerations

Direct replacements should be sought from Epson's RTC portfolio, such as the RX8900CE for enhanced temperature compensation. Cross-vendor substitutes require careful verification of I2C register compatibility and pinout alignment.