tel: +44 1460 256 100 fax: +44 1460 256 101 e-mail: sales@golledge.com web: www.golledge.com 01 may 1998 real time clock - spi ?bus RV3049C2 03 may 2012 features ? temperature compensated accuracy ? aec q200 rev c compliant ? compliant with 4-wire spi-bus ? backup battery input (internal switchover) ? 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) chip select (cs) serial clock input (scl) serial data out (sdo) pad 6 7 8 9 10 connection ground interrupt output (/int) backup supply serial data in (sdi) clk output enable (clkoe) 15 6 10 option codes RV3049C2 product parameters product + option code eg: RV3049C2/b 25ppm -40+85c option code x (eg RV3049C2/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 the RV3049C2 is a real-time-clock module with embedded crystal. this rtc has a 4-wire serial interface (spi-bus) and offers temperature compensated time. the stc (smart temperature compensation) can be factory calibrated to achieve a very high time accuracy of 6ppm over -40c to +85c (option a) and 8ppm from -40c to +125c (option c). beside standard rtc functions, it includes a backup battery input with internal switchover function, a programmable trickle-charge circuitry, an integrated temperature sensor with digital-output and offers 8 bytes ram and 2 bytes eeprom for customer application. the calendar function tracks year and leap-year flags. the clock tracks second, minute and hour in 24-hour format. programmable alarm setting and universal timer functions increase flexibility. description ? manufactured by micro crystal ? stocked &?dis tributed by golledge frequencies (selectable): 32.768khz, 1024hz, 32hz & 1hz ? frequency tolerance @ ?25c: 10ppm typ, 20ppm max ? time accuracy: 3ppm max (0.26s/day) @ 25c ? 6ppm max (0.52s/day), -40+85c ? a 25ppm max (2.17s/day), -40+85c ? b 8ppm max (0.70s/day), -40+125c ? d 30ppm max (2.60s/day), -40+125c ? e operating temperature range: -40 to +85c ? extended op. temp range: -40 to +125c ? storage temperature range: -55 to +125c ? supply voltage (v dd ): spi bus active 1.8 ~ 5.5v ? time-keeping mode 1.3 ~ 5.5v ? supply current (v dd =3.0v): 0.80 a typ, 1.0 a max ? shock and vibration resistance: 5ppm, 5,000g, 0.3ms, ? sine ? 5ppm, 20g, 10.0 ~ 2,000hz ? soldering condition: reflow, 260c, 20 sec max ?
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