RX8130CE B0

Real Time Clock Overview

The RX8130CE B0 is a Real-Time Clock (RTC) module manufactured by Epson Timing, designed for low-power applications. It integrates a 32.768kHz crystal unit and features an I2C bus interface for communication. The device operates within a supply voltage range of 1.25 V to 5.5 V and supports a backup switching mechanism. It maintains time in formats including YY-MM-DD-dd and HH:MM:SS (24 hr). The component is housed in a compact SMD package with dimensions of 3.2x2.5 mm, suitable for space-constrained designs. It functions reliably across a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 32.768kHz crystal unit with factory calibration for high frequency stability.
• Ultra-low power consumption of 300nA typical at 3V during timer hold mode.
• I2C bus interface supporting up to 400kbps data rate.
• Built-in battery charging control and automatic power source switching.

Real Time Clock Applications

• Laptop computers requiring low standby power consumption.
• Smartwatches and wearable devices with limited internal space.
• Portable electronic equipment utilizing lithium battery backup.

Real Time Clock Procurement Notes

Verify the specific suffix 'B0' against the manufacturer's datasheet to confirm packaging details and any minor parameter variations compared to other variants like 'B6'. Ensure compatibility with the host system's I2C voltage levels, as the device supports a wide input range from 1.25V to 5.5V. Confirm availability through authorized distributors given the reported long delivery times for some batches.

Real Time Clock Selection Notes

Select this component when a small form factor (3.2x2.5mm) and integrated crystal are required to reduce board space and external component count. It is suitable for designs needing precise timekeeping without external oscillator components. Consider the digital offset register feature if operation in varying temperature environments requires frequency compensation beyond the standard ppm specification.

Real Time Clock Part Context

The RX8130CE belongs to Epson's series of real-time clock modules that integrate oscillators and calendar counters into a single ceramic package. This integration distinguishes it from discrete RTC chips that require external crystals. The model is part of a family designed for consumer electronics where size and power efficiency are critical constraints.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Epson's official cross-reference guides or contact technical support for verified alternatives before replacing this component in existing hardware.

Real Time Clock FAQ

What is the typical current consumption in timer hold mode?

The typical current consumption is 300nA when powered by a 3V supply.

Does the RX8130CE require an external crystal?

No, the module has an integrated 32.768kHz crystal unit that is calibrated at the factory.

How does the device handle temperature-induced frequency drift?

It provides a Digital Offset Register that allows the host system to compensate for frequency deviations caused by temperature changes using lookup tables provided in the datasheet.