RX-5412SF:B3 PURE SN

Real Time Clock Overview

The EPSON RX-5412SF:B3 is a serial-interface real-time clock module featuring a built-in frequency-adjusted 32.768 kHz crystal unit. It operates with a power voltage range of 2.5 V to 5.5 V and a wide timekeeper voltage range of 1.4 V to 5.5 V. The device includes 2048 bits (256 bytes) of built-in SRAM for user data and event recording. Key electrical characteristics include a typical backup current of 0.5 µA at 3 V and an operating temperature range of -40°C to +85°C. It utilizes a 4-wire serial interface for communication.

Real Time Clock Feature Summary

• Built-in 32.768 kHz crystal unit with digital trimming
• Integrated 256-byte SRAM for memory and event logging
• Automatic power switching between VDD and VBAT upon voltage drop
• Four dedicated input ports for event recorder requests

Real Time Clock Applications

• Industrial equipment requiring precise timekeeping and event logging
• Smart meters and utility infrastructure monitoring
• Automotive electronic control units (ECUs)
• Medical devices with strict reliability requirements

Real Time Clock Procurement Notes

Verify the specific suffix 'B3' against official Epson Toyocom documentation to confirm exact packaging, tape-and-reel specifications, and environmental compliance status. Confirm availability as this component may be subject to lifecycle changes or obsolescence notices.

Real Time Clock Selection Notes

Select this module when a 4-wire serial interface is preferred over I2C or SPI. Ensure the system design accommodates the 2.5 V minimum VDD requirement and provides a stable VBAT source within the 1.4 V to 5.5 V range for continuous operation during main power loss.

Real Time Clock Part Context

This part belongs to the RX-5412 series of serial real-time clock modules from Epson Toyocom. The series is designed for applications demanding high reliability, low power consumption, and integrated non-volatile memory capabilities without external components.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on matching 4-wire serial protocol compatibility, voltage ranges, and package dimensions if cross-referencing is required.

Real Time Clock FAQ

What is the maximum watch dog timer period?

The watch dog timer period can be set up to a maximum of 468.75 ms.

How many event input ports are available?

The module provides four dedicated input ports: EVENT0, EVENT1, EVENT2, and EVENT3.

What is the typical backup current consumption?

The typical backup current consumption is 0.5 µA at 3 V.