RX-8731LC:B PURE SN

Real Time Clock Overview

The RX-8731LC:B PURE SN is a Real-Time Clock (RTC) integrated circuit manufactured by EPSON. It provides clock/calendar functions with an I2C interface, supporting date formats of YY-MM-DD-dd and time formats of HH:MM:SS (24-hour). The device operates within a supply voltage range of 1.7V to 5.5V and consumes a maximum current of 1.4µA at 3V or 1.5µA at 5V. It features an 80-byte EEPROM storage capacity and includes alarm, leap year, and unique ID capabilities. The component is housed in a 12-TFSOJ package (0.094", 2.40mm width) and is rated for operation between -40°C and 85°C.

Real Time Clock Feature Summary

• I2C Interface with 80-byte EEPROM
• Wide Supply Voltage Range (1.7V ~ 5.5V)
• Low Power Consumption (1.4µA @ 3V / 1.5µA @ 5V)
• Integrated Alarm, Leap Year, and Unique ID Features

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with battery backup needs
• Automotive infotainment and monitoring units
• Medical devices requiring calendar tracking

Real Time Clock Procurement Notes

This component is listed as obsolete or end-of-life. Verification of availability through authorized distributors is required. Check for alternative sourcing channels or compatible replacement parts from the manufacturer's portfolio. Ensure compliance with RoHS3 specifications if applicable to the target market.

Real Time Clock Selection Notes

Select this RTC for applications requiring low power consumption and integrated non-volatile memory. Verify that the system supports the I2C protocol and can accommodate the 12-TFSOJ surface-mount package. Confirm that the operating temperature range of -40°C to 85°C meets the environmental requirements of the final product.

Real Time Clock Part Context

The RX-8731LC series belongs to EPSON's line of real-time clock ICs designed for general-purpose use. This specific model variant includes a pure tin finish and integrates EEPROM for data storage. It is part of a broader family of timing solutions offered by EPSON for embedded systems.

Real Time Clock Replacement Considerations

As the part is obsolete, consult EPSON's official documentation for recommended replacements within the RX-8731 series or newer generations. Verify pin compatibility and software register mapping before substituting with other manufacturers' RTCs.