Epson Timing Devices AUTOMOTIVE RA8900CE DTCXO RTC

Epson's RA8900CE is specifically designed for high-precision timing, using digital temperature compensated crystal oscillator (DTCXO) technology to achieve accuracy of ± 3.4 or ± 5 ppm over the entire temperature range, equivalent to+9 or ± 13 seconds per month. Compared to other RTCs that require external crystal units integrated into MCUs, Epson's RA8900CE does not require external crystal units and load capacitors, as these are already integrated internally and adjusted before leaving the factory. It has higher accuracy and lower power consumption.

Built in kHz crystal unit

High precision, enabling function, using digital temperature compensation technology (DTCXO)

Automatic backup battery switching function

Small size

low power consumption

Epson pioneered real-time clocks, then introduced RTC in 1986, and was the first to introduce RTC with digital temperature compensation (DTCXO) in 2008. Epson has always maintained the top market share in the RTC module market and has been leading this market. Epson will continue to innovate and strive to manufacture RTCs with higher precision, lower power consumption, and a wider operating temperature range.

Essentially, RTC is like an I2C communication watch that measures the time of an electronic system. The Epson RA8900CE contains a crystal unit and a digital compensation function crystal oscillator (DTCXO) inside. Its counter is able to store traces of time and date. Epson RA8900CE also comes with time keeping functions, such as alarm and timers

High precision digital temperature compensation RTC with enabling function

The traditional RTC accuracy is based on the temperature characteristics of the tuning fork crystal unit (tuning fork crystal 1), which depends on this. The precision of traditional crystals usually refers to the accuracy at room temperature. Within the entire temperature range of -40 t0+85, the frequency error will reach a maximum of -150 ppm, equivalent to 6.5 minutes per month.

The Epson RA8900CE has a specific temperature compensation function. After factory calibration, the full temperature range is -40 to+85 with an accuracy of<± 3.4ppm, which is equivalent to only+9 seconds per month. This is the most basic requirement for automotive grade. Suitable for car clocks, entertainment, power management, or other automotive grade applications

Don't apply it.

DTCXO technology can only be achieved through integrated crystals. Integrated crystals can eliminate frequency changes caused by load capacitance on the circuit board and allow for factory calibration by combining oscillators and crystals.

Time Keeping Functions

All clock and calendar functions, including a1arms and timers, can be accessed through the I2C interface. Epson's RA8900CE also has frequency output pins that can be set to 1 Hz, 1024 Hz, or 32.768 kHz

Automotive Quality

The Epson RA8900CE is manufactured using a dedicated automotive production line and meets all applicable automotive quality standards, including AEC-Q2003 level ISO9001 and TS16949. PPAP data can be provided upon request,

Automatic Battery Backup

Epson's RA8900CE can detect the main power supply and automatically switch to a battery or supercapacitor, using a backup power supply. The Aisheng RA8900CE is suitable for 2.5-5.5 V main power supply. In backup mode, the battery voltage can still be maintained for a period of time when it drops to 1.6V, and there is still temperature compensation function above 2V.

Ordering Options

Epson's RA8900CE comes in three optional levels and one packaging size.