RTC-72423B: PURE SN

Real Time Clock Overview

The EPSON RTC-72423B: PURE SN is a parallel interface Real-Time Clock (RTC) integrated circuit designed for clock and calendar functions. It supports both 12-hour and 24-hour time formats with HH:MM:SS display. The device operates within a supply voltage range of 4.5V to 5.5V and consumes a maximum current of 5µA to 10µA at voltages between 2V and 5V. It features leap year compensation and is housed in a 24-SOIC package with a width of 7.90mm. The component is rated for an operating temperature range of -40°C to 85°C.

Real Time Clock Feature Summary

• Parallel interface connection for direct microcontroller integration
• Built-in leap year compensation feature
• Supports 12/24 hour time format selection
• Low power consumption of 5µA to 10µA during operation

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with calendar functionality
• Embedded systems needing parallel RTC connectivity

Real Time Clock Procurement Notes

This component is listed as discontinued by the manufacturer. Verification of availability should focus on surplus distributors or existing stock rather than new production orders. Compliance status includes RoHS3 conformity and MSL level 1. Users must confirm end-of-life status before finalizing design implementations.

Real Time Clock Selection Notes

Select this part only if a parallel interface is required, as newer alternatives often utilize I2C or SPI. Ensure the system voltage aligns with the 4.5V to 5.5V operating range. The 24-SOIC package dimensions must fit the PCB layout constraints. Consider the discontinued status when planning long-term production runs.

Real Time Clock Part Context

The RTC-72423B belongs to the Epson RTC-72423 series of real-time clocks. It shares functional similarities with the RTC-72421 model but differs in specific interface or pin configurations typical of the series. This series is designed for applications requiring accurate time and date tracking without complex serial protocol overhead.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, engineers should evaluate alternative Epson RTC models with compatible interfaces or verify pin-to-pin compatibility with other manufacturers' parallel RTCs.