RTC-4574SA:B ROHS

Real Time Clock Overview

The RTC-4574SA:B ROHS is a Real Time Clock (RTC) IC manufactured by Epson Timing, belonging to the RTC-4574SA series. It features a 3-wire serial interface and supports date formats of YY-MM-DD-dd and time formats of HH:MM:SS (24-hour). The device operates on a supply voltage range of 1.6V to 5.5V with a maximum timing current of 1µA to 2µA at 3V to 5V. It is housed in a 14-SOP package (14-SOIC, 0.197"/5.00mm wide) designed for surface mount installation. The component includes alarm and leap year correction features and functions within an operating temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 3-wire serial interface for clock/calendar data access
• Low power consumption with backup current of 1µA ~ 2µA @ 3V ~ 5V
• Supports full calendar with auto-leap year correction and alarm interrupts
• RoHS compliant construction

Real Time Clock Applications

• General purpose real-time clocking in consumer electronics
• Data logging systems requiring accurate timekeeping
• Embedded devices needing low-power calendar functions

Real Time Clock Procurement Notes

This specific part number variant is identified as obsolete or end-of-life in available distributor records. Verification of current stock availability is required as standard packaging quantities may vary between tube and tape/reel configurations depending on the specific suffix. Users should confirm the exact ordering suffix for RoHS compliance status and packaging type before procurement.

Real Time Clock Selection Notes

Select this component when a 3-wire serial interface is preferred over I2C or SPI. Ensure the design accommodates the 14-SOP footprint. Verify that the system voltage remains within the 1.6V to 5.5V range. Consider the -40°C to +85°C industrial temperature rating against environmental requirements.

Real Time Clock Part Context

The RTC-4574SA series from Epson Timing provides integrated RTC solutions with built-in frequency-adjusted 32.768 kHz crystal units. This series is distinct from the RX-4574LC family which utilizes a VSOJ-12 package and similar 3-wire interface but different physical dimensions.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers for this specific obsolete model are not provided in the verified source material. Designers should consult manufacturer discontinuation notices for recommended alternatives.