RTC-62421A

Real Time Clock Overview

The EPSON RTC-62421A is a real-time clock module designed for precise timekeeping in electronic systems. It features an internal crystal unit, eliminating the need for external oscillator components. The device supports both 24-hour and 12-hour formats with automatic leap year adjustment based on the Gregorian calendar. Electrical specifications include a supply voltage range of 4.5 V to 5.5 V, with typical current consumption of 1 µA at 5 V. Frequency precision is ±10 ppm at +25 °C, ensuring high accuracy for data logging and timestamping applications.

Real Time Clock Feature Summary

• Built-in crystal unit allows for adjustment-free operation without external capacitors.
• Automatic leap year setting compatible with the Gregorian calendar.
• Configurable 24-hour or 12-hour time format.
• Low power consumption with typical current draw of 1 µA at 5 V.

Real Time Clock Applications

• Data logging systems requiring accurate timestamps.
• Embedded monitoring equipment.
• Time-sensitive industrial control units.

Real Time Clock Procurement Notes

Verify compatibility when replacing older RTC-6242 series components, as the 7242 series lacks complete backward compatibility. Confirm technical details using the latest official documentation before integration. Ensure supply voltage remains within the 4.5 V to 5.5 V range for optimal performance.

Real Time Clock Selection Notes

Select this model for applications requiring high frequency stability (±10 ppm) and low power usage. Note that the RTC-7242 series is not fully compatible with the legacy RTC-6242 series; verify pinout and register mappings if upgrading from previous generations.

Real Time Clock Part Context

This component belongs to the Epson RTC-7242 series family. While related to the RTC-6242 series, it represents a newer design iteration. The datasheet explicitly states that the 7242 series does not possess complete compatibility with the older 6242 series products.

Real Time Clock Replacement Considerations

Direct replacement for RTC-62421A requires careful verification due to stated incompatibility with the older 6242 series. Consult the latest manual for technical differences before substituting.