Gravity: I2C SD2405 RTC Module SKU: DFR0469 

 

Introduction

We're glad to introduce a new member in Gravity family: Gravity I2C SD2405 RTC module. This is

an extremely accurate I2C real-time clock (RTC) with crystal compensation, inner chargeable

battery. The SD2405AL is available in industrial temperature ranges.

The SD2405AL is dual power supply system. When the primary power supply goes down to an

assigned value or resumes from low power, the system can switch between the primary power

supply and battery automatically. Even there is no external power, it can still work for 5~8 years, 1uA

ultra-low power consumption (inner battery, Ta=25°C).

The SD2405AL can generates various periodic interrupt clock pulses lasting for long period (one

year), and three alarm interrupts can be made by year, month, date, days of the week, hours, and

minutes, seconds. It also provides a selectable 32.768KHz~1Hz clock output for an external MCU.

The product incorporates a time trimming circuit that adjusts the clock with higher precision by

adjusting any errors in crystal oscillator frequencies based on signals from the CPU. A 12-bytes

general SRAM is implemented in the SD2405AL.

Gravity SD2405 RTC can work as data logger, timer alarm clock and other time application. It is an

ideal choice for timing project.