real time clock - low power RV2123C2 tel: +44 1460 256 100 fax: +44 1460 256 101 e-mail: sales@golledge.com web: www.golledge.com 21 nov 2012 features ? ultra low power consumption ? compliant with 4-wire spi-bus ? time keeping mode down to 1.1 v ? frequency-offset trimming register ? programmable alarm, timer and interrupt 1.20 (max) 5.20 (max) 3.40 (max) solder pad layout top view 2.20 0.60 1.00 0.90 0.40 1.00 pad 1 2 3 4 5 connection supply (vdd) frequency output (clkout) serial clock input (scl) serial data in (sdi) serial data out (sdo) pad 6 7 8 9 10 connection ground (vss) chip enable (ce) interrupt output (/int) not connected clk output enable (clkoe) 15 6 10 option codes RV2123C2 product parameters product + option code eg: RV2123C2/b 20ppm option code x (eg RV2123C2/x) denotes a custom spec. ordering information ? standard. ? optional - please specify required code(s) when ordering specifications ? available on t&r - 1k or 5k pcs per reel ? evaluation / development board & ?manual a vailable on request block diagram this rtc ic has been specially designed to achieve an ultra-low power consumption of typically 130na @ v dd 3.0v in time-keeping mode. the very small smt ceramic-package combines the 32.768 khz crystal unit with the cmos-based oscillator and real-time-clock circuitry. the calendar function tracks year, month, date, and day-of-the-week with built-in century and leap-year flags. the clock function tracks minute and second in 24-hour format. programmable alarm setting and universal timer functions increase flexibility. description frequencies (programmable): 32.768khz ~ ?1hz ? frequency tolerance: 10ppm ? a 20ppm ? b other ? specify turnover temperature (t 0 ): +25c 5c ? frequency / temp coefficient: -0.035ppm/c 2 10% ? operating temperature range: -40 to +85c ? storage temperature range: -55 to +125c ? supply voltage (v dd ): spi bus active 1.6 ~ 5.5v ? timekeeping mode 1.1 ~ 5.5v ? supply current (during access): 30/80 a typ/max (fscl=1mhz v dd =3v) ? 250/400 a typ/ma x (fscl=4.5mhz v dd =3v) ? supply current (time-keeping): 130/180na typ/max (fscl=0hz, v dd =3v) ? 110/160na typ/max (fscl=0hz, v dd =1v) ? ageing: 3ppm ma x first year ? shock and vibration resistance: 5ppm, 5,000g, 0.3ms, ? sine ? 5ppm, 20g, 10.0 ~ 2,000hz ? soldering condition: reflow, 260c, 20 sec max ? ? manufactured by micro crystal ? stocked &?dis tributed by golledge
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