R2062L01-E2

Real Time Clock Overview

The R2062L01-E2 is a CMOS real-time clock IC featuring a three-wire interface (CE, SCLK, SIO) for CPU communication. It includes an automatic battery backup switchover circuit between the main supply (VCC) and a secondary source (VDD). The device maintains time and calendar data in BCD format with automatic leap year recognition up to 2099. Key electrical parameters include a typical timekeeping current of 0.4 µA at 3V, a minimum operating voltage of 0.75V, and a VCC power monitoring threshold of 2.70V typ. It operates within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Three-wire serial interface supporting maximum clock frequencies of 1 MHz
• Automatic backup switchover circuit compatible with secondary batteries or capacitors
• Built-in oscillation stabilization capacitors and high-precision frequency adjustment circuit
• Dual alarm interrupt circuits and six selectable periodic interrupt options

Real Time Clock Applications

• Portable electronic devices requiring low-power timekeeping
• Systems utilizing electric double-layer capacitors for backup power
• Embedded controllers needing precise calendar and alarm functions

Real Time Clock Procurement Notes

Verify that the specific ordering suffix E2 corresponds to the required taping type as defined in the manufacturer's selection guide. Confirm that the VDET1 threshold of 2.70V aligns with the system's power monitoring requirements before integration.

Real Time Clock Selection Notes

Select this model over the R2062L02 variant if the system requires a lower VCC power monitoring threshold of 2.70V instead of 2.90V. Ensure the design accommodates the QFN023023-16 package dimensions and connects the internal tab to VSS for proper grounding.

Real Time Clock Part Context

This component belongs to the R2062 series of real-time clocks manufactured by Nisshinbo Micro Devices. The 'L' designation indicates the QFN023023-16 package, while '01' specifies the 2.70V detector threshold. The K-series variants are discontinued.

Real Time Clock Replacement Considerations

The R2062K01-E2 is a functionally equivalent alternative using the FFP12 package, though it is discontinued. No other active substitutes are confirmed in public documentation.