Seiko Epson Corporation has added two new real-time clock (RTC) modules to its lineup: the RX8111CE and RX4111CE. Both come in a tiny 3.2 x 2.5 x 1.0 mm package and are equipped with a time-stamp function. Epson began shipping samples of the RX8111CE in November 2019 and the RX4111CE in December 2019. Epson expects to commence volume production in March 2020.
Epson’s RTC modules are widely used in equipment that needs time of day information to be logged and stored. In recent years, electronic equipment has continued a trend of integration while realizing a reduction in their physical and environmental footprints. The need for RTC modules that consume less current and maintain accurate time over a wider temperature range has grown in kind.
Like their predecessor, Epson’s RX8130CE, the new RTC modules are small, have a built-in frequency-adjusted 32.768 kHz crystal unit, and an automatic battery switchover function. However, the new modules are also equipped with a time-stamp function that logs and stores time information. The function can be used, for example, to record the time of system software updates, battery replacements, and system alerts. Time-stamps are stored even when power is switched over to the alternative battery source, contributing to system robustness. The new modules consume 100nA, a 67% improvement from their predecessor. This significant reduction in current consumption makes it possible to use a smaller, cheaper secondary battery or capacitor. In addition, Epson has also expanded the interface options by offering an SPI-Bus interface in addition to an I2C-Bus*2 interface.
For more information, please visit http://www.epson-electronics.de.