RX-4803SAUA0 PURE SN

Real Time Clock Overview

The RX-4803SAUA0 PURE SN is a digital real-time clock (RTC) module manufactured by Epson Timing. It operates within a supply voltage range of 1.6 V to 5.5 V and functions in temperatures from -40°C to +85°C. The device utilizes an SPI bus interface for communication and features a SOP-14 surface-mount package. Key electrical specifications include a frequency tolerance of ±3.4 ppm across the operating temperature range, ensuring high stability. The module supports date formats of YY-MM-DD-dd and time formats of HH:MM:SS:hh in both 12-hour and 24-hour modes.

Real Time Clock Feature Summary

• High frequency stability with ±3.4 ppm tolerance over -40°C to +85°C
• SPI serial communication interface for register configuration and data access
• Integrated 1/100 second precision time register with capture buffer
• Supports external 1PPS signal synchronization for GPS applications

Real Time Clock Applications

• Automotive electronics systems requiring precise timing under wide temperature variations
• Industrial control equipment needing stable clock signals
• Medical devices demanding accurate timekeeping
• GPS synchronization modules utilizing 1PPS input

Real Time Clock Procurement Notes

Verify component authenticity through authorized Epson Timing distributors or certified suppliers. Confirm the specific suffix 'PURE SN' matches project requirements for lead-free compliance and packaging format. Check current availability status as supply may be restricted in certain regions. Ensure the SOP-14 package dimensions align with PCB layout constraints before finalizing procurement orders.

Real Time Clock Selection Notes

Select this model when SPI interface compatibility is required instead of I2C alternatives like the RX-8025SA series. Choose the UA0 variant specifically for applications necessitating the tightest frequency tolerance of ±3.4 ppm across the full industrial temperature range. Consider the SOP-14 footprint if space allows, noting that other variants may offer different pinouts or interfaces.

Real Time Clock Part Context

This component belongs to the RX-4803SA family of digital RTC modules designed for high-stability applications. Unlike standard analog RTCs, it uses internal digital AD conversion to correct environmental frequency drift. The UA0 designation indicates the specific performance grade regarding temperature stability compared to other sub-models like UB or UC.

Real Time Clock Replacement Considerations

Direct replacements must match the SPI interface and SOP-14 package. The RX-4803LCUA0 offers similar stability but requires verification of interface compatibility. Other Epson RTCs like the RX-8025SA use I2C and are not pin-compatible without schematic changes.