RTC-4574SA:B3:PURE SN

Real Time Clock Overview

The RTC-4574SA:B3:PURE SN is a Real Time Clock (RTC) integrated circuit manufactured by Epson Timing. It features a 3-wire serial interface and provides clock/calendar functionality in a 14-SOP surface-mount package. The device operates within a supply voltage range of 1.6V to 5.5V, with a maximum current consumption of 1µA to 2µA at 3V to 5V. It supports an operating temperature range of -40°C to 85°C and includes alarm features. This component is classified as obsolete and has been discontinued by the manufacturer.

Real Time Clock Feature Summary

• 3-wire serial interface for clock and calendar data access
• Low power consumption: 1µA ~ 2µA @ 3V ~ 5V
• Wide operating voltage range: 1.6V to 5.5V
• Industrial temperature range: -40°C to 85°C

Real Time Clock Applications

• Embedded systems requiring precise timekeeping
• Data logging devices needing calendar tracking
• Industrial equipment with low-power constraints

Real Time Clock Procurement Notes

This part number is officially marked as obsolete and no longer manufactured by Epson Timing. Verification of availability should focus on surplus distributors or secondary markets rather than direct OEM channels. Buyers must confirm the authenticity and condition of existing stock, as production has ceased. Compliance with RoHS3 standards is documented for this specific variant.

Real Time Clock Selection Notes

Designers seeking a replacement should consider components with compatible 3-wire serial interfaces and similar voltage ranges. The 14-SOP package dimensions must be verified against potential substitutes to ensure mechanical fit. Electrical parameters such as current consumption and accuracy specifications should be compared directly to meet system requirements without relying on generic family characteristics.

Real Time Clock Part Context

The RTC-4574SA series belongs to Epson's lineup of real-time clock ICs. This specific model utilizes a 3-wire serial protocol, distinguishing it from I2C-based variants like the RX-8571 series. The 'B3' suffix typically denotes specific packaging or material compliance details within the product line, while 'PURE SN' indicates lead-free composition.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers include DS1392U-33+ from Analog Devices Inc./Maxim Integrated. Designers should verify pin compatibility and software register mapping when transitioning to alternative RTC solutions.