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RTCs with small size, long battery life, and best in class accuracy


The RX8130CE and RX8900CE from Epson are the most advanced Real-Time Clocks available today with long battery life, small size, and best in class accuracy. Both modules are offered in a very small package (3.2 x 2.5 x 1.0 mm) with an integrated IC and crystal. By integrating the crystal, these new RTCs save board space, reduce cost, and improve accuracy as well as functional safety.

To protect against power failure, most RTCs use external components, typically a diode, to switch from main to battery power. Beside using board space these external components the voltage drop across the diode reduces battery life. Epson's RX8130CE and RX8900CE include different versions of automatic power switch that requires no external components and maximizes operating life.

The RX8130CE is a cost optimized low power module featuring a power switch function and achieving an accuracy of 5 ± 23 ppm at 25°C. The RX8900CE uses DTCXO (digital temperature-compensated crystal oscillator) technology to achieve ± 5 or ± 3.4 ppm accuracy over the entire -40 to +85°C operating range. The RA8900CE is AEC-Q200 compliant and manufactured on a dedicated automotive assembly line.


Specifications

ProductRA8900CERX8900CERX8130CE
Operating current (typ.)0.7mA0.7mA 0.3mA
Supply voltage1.6 to 5.5V1.6 to 5.5V 1.1 to 5.5V
Accuracy± 5/± 3.4 ppm*± 5/± 3.4 ppm*± 5/± 3.4 ppm**
Temperature-40 to +85°C-40 to +85°C-40 to +85°C
Size3.2x2.5x1.0mm3.2x2.5x1.0mm3.2x2.5x1.0mm
Automotive qualificationAEC-Q200NoNo
InterfaceI2CI2CI2C

* @ -40 to +85°C** @ 25°C



Applications
•  Factory automation
•  Metering
•  Sensor networks
•  Surveillance camera (combined with Epson Gyro-sensors)




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