RTC-4574JE:B ROHS

Real Time Clock Overview

The EPSON RTC-4574JE:B ROHS is a Real Time Clock (RTC) IC belonging to the RTC-4574 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 within a supply voltage range of 1.6V to 5.5V, with a typical timing current of 1µA to 2µA at 3V to 5V. It includes alarm and leap year correction functions. The component is housed in a 14-SOP package and is rated for an operating temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• 3-Wire Serial Interface
• Supply Voltage: 1.6V to 5.5V
• Low Timing Current: 1µA ~ 2µA @ 3V ~ 5V
• Alarm and Leap Year Functions

Real Time Clock Applications

• Clock/Calendar Systems
• Data Logging Devices
• Embedded Controllers

Real Time Clock Procurement Notes

This specific part number is listed as inactive or discontinued by major distributors. Verification of availability should focus on obsolete stock or alternative packaging types such as tube versus cut tape. Cross-reference with the manufacturer's discontinuance notification for the RTC-4574 series is recommended before procurement planning.

Real Time Clock Selection Notes

Select this component when a 3-wire serial interface is required instead of I2C or SPI. Ensure the design accommodates the 14-SOP footprint. Verify that the system voltage falls within the 1.6V to 5.5V range. Consider the low backup current specification for battery-backed applications requiring extended runtime.

Real Time Clock Part Context

The RTC-4574JE:B ROHS is part of the broader RTC-4574 family from Epson Timing. This series integrates a built-in frequency-adjusted 32.768 kHz crystal unit. Variants within the family differ primarily by package type (e.g., SA for SOP, LC for VSOJ) and suffix specifications regarding lead-free compliance and purity.

Real Time Clock Replacement Considerations

Public documentation identifies DS1392U-33+ (Analog Devices Inc./Maxim Integrated) as a similar replacement option for the RTC-4574SA variant. Verify pinout compatibility and interface differences before substitution.