MLAB
Module
mlab mlab-module i2c-bus real-time-clock rtc

RTC02

Real Time Clock controlled through I2C with battery backup. The accuracy of the order of 20 ppm.

This is an open-source hardware design, one of the modules from the MLAB labolatory system.

Czech

RTC02A - High-accuracy I2C Real Time Clock module

RTC02A

Real-Time Clock controlled through I2C with battery backup. The accuracy is in the order of 20 ppm.