Maxim Integrated MAX6902ETA+T Real-Time Clock (RTC) Module

The MAX6902ETA+T is a compact, high-precision Real-Time Clock (RTC) module produced by Maxim Integrated, designed to provide accurate time and date information for a wide range of applications. This RTC is particularly suitable for systems where reliable timekeeping is crucial, such as in data loggers, instrumentation, telematics, and other embedded systems.

Encased in a tiny 8-pin TDFN package, the MAX6902ETA+T is optimized for low-power consumption, making it an excellent choice for portable and battery-operated devices. Its power requirements are minimal, with a supply voltage range of 2.7V to 5.5V, ensuring compatibility with most microcontrollers and digital systems.

One of the key features of this RTC is its built-in quartz crystal, which resonates at 32.768 kHz. This frequency is the standard for timekeeping devices because it allows for easy division down to a one-second time base. The MAX6902ETA+T also includes an integrated temperature-compensated crystal oscillator (TCXO), which ensures high accuracy across a wide temperature range, making it reliable in various environmental conditions.

The device offers a simple I²C interface for communication, allowing for easy integration into existing systems without the need for complex wiring or protocols. It supports a timekeeping format of hours, minutes, and seconds, as well as a calendar function that includes day, date, month, and year data.

Additional features include an alarm function that can be programmed to trigger on a specific time and date, and a power-fail reset that ensures the RTC continues to keep time even during power interruptions, provided that a backup energy source, such as a coin cell battery, is connected.

Overall, the Maxim Integrated MAX6902ETA+T is a robust and reliable RTC module that offers precision timekeeping in a small form factor. It is an ideal solution for designers looking to add time and date functionality to their projects without sacrificing space or power efficiency.