RTC-4574SA:B3 ROHS

Real Time Clock Overview

The RTC-4574SA:B3 is a Real Time Clock IC manufactured by EPSON, housed in a 14-SOIC package. It supports a supply voltage range of 1.6V to 5.5V and operates within a temperature range of -40°C to +85°C. The device features a 3-wire serial interface and provides clock/calendar functionality with date formats including YY-MM-DD-dd and time formats HH:MM:SS (24-hour). It includes alarm and leap year features, with maximum current consumption of 1µA to 2µA at 3V to 5V.

Real Time Clock Feature Summary

• Integrated real-time clock and calendar functionality with 3-wire serial interface
• Supports alarm generation and automatic leap year correction
• Operates across wide industrial temperature range from -40°C to +85°C
• Compatible with low-voltage power supplies ranging from 1.6V to 5.5V

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Embedded devices needing calendar and alarm functions
• Data logging equipment with serial communication interfaces
• Consumer electronics operating in variable temperature environments

Real Time Clock Procurement Notes

This component is officially marked as obsolete or inactive by the manufacturer. Verification of availability should focus on distributor stock status rather than direct manufacturing orders. Confirm RoHS compliance status and check for valid alternative part numbers from the same series before procurement planning.

Real Time Clock Selection Notes

Select this part when a 14-pin surface-mount RTC with 3-wire serial interface is required. Ensure system voltage falls within the 1.6V to 5.5V range. Verify that the 14-SOIC package dimensions fit the PCB layout. Consider the -40°C to +85°C operating range against environmental conditions.

Real Time Clock Part Context

The RTC-4574SA:B3 belongs to Epson's RTC-4574 series of real-time clock integrated circuits. This series typically offers similar core functionalities with variations in package type or interface options. The SA variant specifically denotes the 14-SOIC package configuration with standard commercial/industrial temperature ratings.

Real Time Clock Replacement Considerations

Official substitutes include other variants within the RTC-4574 series such as RTC-4574JE:B3 or RTC-4574NB:B3, provided they match the required package and interface specifications. Cross-reference datasheets to confirm pin compatibility and electrical characteristics before substitution.