RX-4045NBACB

Real Time Clock Overview

The EPSON RX-4045NBACB is a Real Time Clock (RTC) IC featuring an integrated clock/calendar function. It utilizes a 4-Wire Serial interface for data communication and operates within a supply voltage range of 1.7V to 5.5V. The component is housed in a 22-SMD, 20 Leads, Flat Leads package, specifically identified as a 22-SON with dimensions of 6.3x4.8 mm. It supports a time format of HH:MM:SS and includes built-in alarm capabilities. The device is designed for industrial applications with an operating temperature range spanning from -40°C to +85°C.

Real Time Clock Feature Summary

• Built-in 32.768 kHz crystal unit factory-adjusted for frequency accuracy
• Supports 4-Wire SPI interface for serial communication
• Integrated alarm functionality for time-based events

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with calendar tracking needs
• Embedded devices operating in wide temperature environments

Real Time Clock Procurement Notes

Verify the specific ordering suffix against official Epson documentation to ensure correct package and feature configuration. Confirm that the 22-SON package dimensions match your PCB footprint requirements. Check for any regional availability constraints or lifecycle status updates directly from authorized distributors before placing orders.

Real Time Clock Selection Notes

Select this component when a low-voltage RTC with an integrated crystal is required. Ensure the design supports the 4-Wire Serial interface protocol. Verify that the operating temperature range meets the environmental conditions of the target application. Consider the physical size constraints imposed by the 22-SON package during layout planning.

Real Time Clock Part Context

This part belongs to Epson's NeoSeries line of real-time clocks, which are known for integrating the crystal resonator directly onto the package. This integration reduces board space and simplifies assembly compared to discrete RTC solutions. The series targets applications needing reliable timekeeping without external oscillator components.

Real Time Clock Replacement Considerations

Direct substitutes include other variants within the RX-4045NB family, such as RX-4045NBAA3, provided pin compatibility and interface specifications align. Always cross-reference datasheets to confirm identical voltage ranges and package dimensions before swapping.