RX-8731LC:B

Real Time Clock Overview

The RX-8731LC:B is a Real-Time Clock (RTC) IC manufactured by Epson. It features an I2C bus interface for communication and supports date formats including YY-MM-DD-dd and time formats in HH:MM:SS (24-hour). The device includes an integrated EEPROM with a storage capacity of 80 bytes. It operates within a supply voltage range of 1.7V to 5.5V, with maximum current consumption of 1.4µA at 3V and 1.5µA at 5V. The component is housed in a 12-TFSOJ package (12-VSOJ), measuring 0.094 inches (2.40mm) in width. It functions within a temperature range of -40°C to 85°C.

Real Time Clock Feature Summary

• Integrated real-time clock functionality with calendar capabilities and leap year compensation.
• Includes non-volatile EEPROM memory for data storage alongside timekeeping functions.
• Supports standard I2C bus interface for system connectivity.
• Features unique ID identification and alarm capabilities.

Real Time Clock Applications

• Embedded systems requiring precise timekeeping and calendar tracking.
• Data logging devices needing timestamp generation.
• Consumer electronics utilizing low-power RTC solutions.
• Industrial equipment operating in extended temperature environments.

Real Time Clock Procurement Notes

Verify the exact suffix designation, as the provided model RX-8731LC:B differs from the documented RX-8731LC:B3 PURE SN. Confirm availability status, as the B3 variant is listed as obsolete. Ensure compatibility with the 12-TFSOJ footprint during design integration. Check for RoHS compliance requirements against specific project standards.

Real Time Clock Selection Notes

Select this component when a combined RTC and EEPROM solution is required in a compact surface-mount package. Consider the wide supply voltage range for flexible power design. Evaluate the low current consumption for battery-backed applications. Verify that the I2C interface aligns with the host controller's communication protocols.

Real Time Clock Part Context

This part belongs to Epson's family of I2C-bus interface real-time clock modules. Similar components include the RX-8564LC and RX-8025SA. These devices are designed for applications requiring accurate timekeeping with minimal external components. The series emphasizes low power consumption and small form factors suitable for portable and embedded electronics.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The RX-8731LC:B3 is listed as obsolete. Designers should consult official Epson resources or distributors for current equivalent recommendations or alternative RTC/EEPROM combinations.