RX8010SJ B0 PURE SN

Real Time Clock Overview

The EPSON RX8010SJ is a real-time clock (RTC) module featuring an integrated temperature-compensated crystal oscillator, eliminating the need for external components. It provides high-precision timing with accuracy specifications of ±5ppm over -40°C to +85°C and ±3.8ppm over -40°C to +125°C. The device operates on a 1.6V to 5.5V supply via an I²C interface (up to 400kHz). Key features include alarm functions, periodic interrupts, and a selectable 32.768kHz output. It supports automatic backup power switching and clock stop detection in an 8-pin SOP package.

Real Time Clock Feature Summary

• Integrated Temperature Compensated Crystal Oscillator (TCXO) for high precision without external crystals
• I²C Interface supporting Standard Mode (100kHz) and Fast Mode (400kHz)
• Wide Operating Voltage Range: 1.6V to 5.5V
• Alarm Function configurable by minute, hour, day of week, or date
• Clock Stop Detection and Automatic Backup Power Switching

Real Time Clock Applications

• Smart home appliances requiring precise timekeeping
• Industrial control systems and measurement instruments
• IoT devices and embedded sensors
• Portable battery-powered equipment

Real Time Clock Procurement Notes

Verify the specific suffix 'B0 PURE SN' against official Epson documentation to confirm exact temperature range and packaging variations. Ensure compatibility with I²C bus voltage levels and check for any specific ordering codes related to tape-and-reel quantities if applicable.

Real Time Clock Selection Notes

Select this component when PCB space is limited due to the integrated crystal design. Verify that the system requires I²C communication and can handle BCD-coded register data. Consider the ±5ppm accuracy sufficient for most consumer applications, or ±3.8ppm for wider industrial temperature ranges.

Real Time Clock Part Context

The RX8010 series represents Epson's line of low-power RTC modules with built-in oscillators. The SJ designation typically refers to the SOP-8 package variant. This model serves as a drop-in replacement for traditional RTCs requiring external 32.768kHz crystals, simplifying circuit design and improving reliability against vibration.

Real Time Clock Replacement Considerations

Direct pin-to-pin replacements within the same family include other RX8010 variants with different suffixes indicating temperature grades or packaging. Cross-family replacements like the RX8111CE offer similar functionality but may differ in specific interrupt configurations or voltage ranges.