Epson offers an extensive lineup of RTC modules with built-in 32.768 kHz crystal units.
In addition to simply keeping time, there are products that also maintain accurate time even in high-temperature environments and products equipped with various other functions.
You can use the flow chart and product comparison table below to assist you in selecting the right product for your needs.

Flow Chart for Selecting an RTC Module

The flow chart shown below is for selecting an RTC module based on the main functions of products that come in a 3.2 x 2.5 mm package.
All RTC modules provide basic functions, including timekeeping, calendar, alarm, and wake-up timer.
You can click on the shapes in the flow chart to get explanations about what each function does or to view detailed comparisons between products.

<  Product Name  >
RA series　 Automotive grade
RX series　 Consumer Electronics, Industrial Equipment
8XXX series　I^２C interface
4XXX series　SPI interface

* Please refer to the product list for products other than those that come in a 3.2 x 2.5 mm package.