RTC-4701NB:B3 ROHS

Real Time Clock Overview

The RTC-4701NB:B3 ROHS is a Real-Time Clock (RTC) integrated circuit manufactured by Epson. It features a 3-wire serial interface for communication and supports date formats including YY-MM-DD-dd. The device operates within a supply voltage range of 2.5V to 5.5V and draws a maximum current of 1µA to 3µA at voltages between 2V and 5V. It is housed in an 18-SOP package with a width of 0.213 inches (5.40mm). The component includes leap year compensation and displays time in HH:MM:SS (24-hour) format. It is designed for surface mount installation and functions within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• 3-Wire Serial Interface
• Leap Year Compensation
• 18-SOP Package (5.40mm Width)
• Operating Temperature: -40°C to +85°C

Real Time Clock Applications

• Industrial Control Systems
• Consumer Electronics
• Data Logging Devices

Real Time Clock Procurement Notes

Verify the part status as discontinued before procurement planning. Confirm the specific suffix requirements for RoHS compliance and packaging type, such as tape and reel, against official distributor listings. Ensure compatibility with existing 3-wire serial protocols in the target design.

Real Time Clock Selection Notes

Select this component when a low-power RTC with a 3-wire serial interface is required. Verify that the 18-SOP footprint fits the PCB layout constraints. Check if the operating voltage range of 2.5V to 5.5V aligns with the system power supply. Consider the -40°C to +85°C industrial temperature rating for environmental suitability.

Real Time Clock Part Context

This part belongs to the Epson RTC-4701 series of real-time clock/calendar ICs. It is distinct from other Epson RTC models like the RTC-4543SB which may have different pin counts or interfaces. The 'B3' suffix typically denotes specific packaging or ordering information, while 'ROHS' indicates compliance with restriction of hazardous substances directives.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Due to the discontinued status, direct replacements should be evaluated based on pin compatibility, interface protocol (3-wire serial), and package dimensions (18-SOP). Consult manufacturer documentation for potential obsolescence management options.