Real Time Clock draws 130 nA at 3.0 V.
October 29, 2009 -
Housed in 5.0 x 3.2 x 1.2 mm SMD package, Model RV-2123-C2 contains 32.768 kHz Tuning Fork crystal, matched with CMOS-based oscillator and real-time-clock circuitry. Device features ultra-wide 1.1-5.5 V operating range and SPI-Bus® for communications with other circuitry. At room temperature, frequency and time keeping is within ±10 ppm or within ±20 ppm at 25°C. RoHS-compliant clock is suited for compact portable devices, especially where super capacitor is used for backup supply operation.
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Original Press release
Micro Crystal, U.S.
601-T W. Campus Dr.
Arlington Heights, IL, 60004
USA
Precise Real Time Clock Has World's Lowest Current Drain
For applications requiring ultra-low power consumption, Micro Crystal has introduced a SMD package real time clock (RTC) that typically draws just 130nA @ 3.0V. The RV-2123-C2 is ideal for compact portable devices, especially where a super capacitor is used for backup supply operation. Its ultra-wide 1.1V to 5.5V operating range provides added flexibility. Communications with other circuitry is simplified by an SPI-Bus® (SCL up to 8 MHz @ 5.0V).
The SON 10 pin ceramic package contains a built-in 32.768 kHz Tuning Fork crystal, matched with a CMOS-based oscillator and real-time-clock circuitry. At room temperature, frequency and time keeping is within +/-10ppm or within +/- 20ppm @ 25°C. A user programmable Frequency Offset Compensation Register can be used to improve time accuracy. Aging rate is at a maximum of 3ppm for the first year.
The clock function tracks minutes and seconds either in 24-hour or in 12-hour AM/PM format. Programmable alarm setting and universal timer functions further increase flexibility. A calendar function provides year, month, date, and day-of-the-week, with built-in century and leap-year flags.
Moreover, the RV-2123-C2 offers open-drain Interrupt and programmable Clock Output for peripherals devices (32.768 kHz down to 1 Hz).
Because it is entirely self-contained, the RV-2123-C2 is a simple solution that can save engineering, procurement and inventory costs. External dimensions of the standard ceramic package are 5.0 x 3.2 x 1.2 max. mm. Like all Micro Crystal products, it is RoHS compliant and 100% lead free.
Potential applications are widespread, including: battery powered handheld devices, portable point of sales terminals, GPS, digital still cameras, glucose meters, security systems, appliances, factory automation, programmable logic control and data loggers.
Micro Crystal's RV-2123-C2 Real Time Clock is available in production quantities, with 10 to 12 week delivery.
For further information, feel free to send an email to info@microcrystal.com
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