RTC-63421B

Real Time Clock Overview

The RTC-63421B is a real-time clock integrated circuit manufactured by Epson. It provides precise timekeeping functions including seconds, minutes, hours, days, dates, months, and years with leap year compensation. The device features an I2C bus interface for communication with host microprocessors. It includes alarm functions and a square wave output capability. The component is designed for low power consumption and operates within standard voltage ranges suitable for portable and industrial applications requiring accurate time data retention.

Real Time Clock Feature Summary

• Integrates real-time clock functionality with calendar counters and leap year adjustment logic
• Utilizes a two-wire serial I2C bus interface for system connectivity
• Supports programmable alarm outputs and periodic square wave generation
• Maintains timekeeping data during main power loss via backup battery connection

Real Time Clock Applications

• Portable electronic devices requiring persistent time tracking
• Industrial control systems needing synchronized event logging
• Consumer appliances with scheduled operation modes
• Automotive infotainment units requiring time synchronization

Real Time Clock Procurement Notes

Verify the specific package variant and operating temperature range against the official datasheet before ordering. Confirm I2C address settings and voltage compatibility with the target system design. Ensure supply chain authenticity through authorized distributors to prevent counterfeit components. Check for any recent lifecycle status updates or recommended replacements from the manufacturer.

Real Time Clock Selection Notes

Select this component when a compact, low-power real-time clock with I2C interface is required. Consider the available backup battery options for extended data retention. Evaluate the pin configuration and footprint compatibility with the printed circuit board layout. Assess the need for additional external crystals if not integrated internally.

Real Time Clock Part Context

This part belongs to Epson's family of real-time clock ICs designed for general-purpose timekeeping applications. It complements other Epson timing solutions by offering a balance of precision and interface simplicity. The device is commonly used in conjunction with microcontrollers that lack built-in RTC peripherals. Its small form factor makes it suitable for space-constrained designs.

Real Time Clock Replacement Considerations

Consult the official Epson replacement guide for direct substitutes. Verify pin-to-pin compatibility and register-level equivalence if cross-referencing with similar RTC models from other manufacturers.