RX8901CE XS B0B

Real Time Clock Overview

The RX8901CE XS B0B is a Real-Time Clock (RTC) IC from Epson Timing, designed for high-precision timekeeping in compact electronic systems. It features an I2C bus interface and operates within a supply voltage range of 1.6V to 5.5V. The device integrates a temperature-compensated crystal oscillator (TCXO) with a frequency tolerance of +/-3.0ppm across the -40°C to +85°C operating temperature range. Packaged in a 10-SMD, no-lead ceramic footprint measuring 3.2mm x 2.5mm, it supports date formats including YY-MM-DD and time formats HH:MM:SS. The component includes alarm functions and utilizes pin 4 for EVIN3 input.

Real Time Clock Feature Summary

• High precision +/-3.0ppm frequency tolerance (-40°C to +85°C)
• I2C bus interface for simple connectivity
• Compact 10-SMD (3.2x2.5mm) ceramic package
• Wide supply voltage range: 1.6V to 5.5V

Real Time Clock Applications

• Industrial equipment requiring precise timing
• Consumer electronics with space constraints
• Data logging devices needing accurate timestamps

Real Time Clock Procurement Notes

Verify the specific suffix 'B0B' against official Epson documentation, as standard listings often cite 'B06' or 'B00'. Confirm availability through authorized distributors, as stock levels for specific sub-models may vary. Ensure compatibility with the target PCB footprint and voltage requirements before ordering.

Real Time Clock Selection Notes

Select this model when high accuracy (+/-3.0ppm) is critical compared to standard +/-5.0ppm variants like the XB series. The CE package size suits high-density boards. Verify if the EVIN3 function on Pin 4 meets system power management needs, distinguishing it from FOUT configurations.

Real Time Clock Part Context

Part of the RX8901CE family, which offers high-precision RTC solutions. The 'XS' suffix denotes the +/-3.0ppm tolerance grade. This series is positioned above the RX8900CE in terms of accuracy but shares similar packaging and interface standards, targeting applications where drift compensation is essential.

Real Time Clock Replacement Considerations

Direct substitutes include other RX8901CE variants with different suffixes (e.g., RX8901CE XS B06) if the pin configuration matches. For lower accuracy needs, the RX8900CE series may be considered, though it lacks the same ppm specification.