actual size real time clock module block diagram ? ? ? ? overview ? ? 32khz output control osc comparator_d alarm_d register (min,hour) address decoder address register voltage detect div time counter (sec,min,hour,week,day,month,year) shift register i/o control ? fout interrupt control clk divider correc -tion v dd gnd comparator_w alarm_w register (min,hour, week) ce osc detect d ? ?? features built-in 32.768 ? khz crystal unit ? frequency adjusted for ? high accuracy ( ??? 5 ?? 10 ? 6 ?? /t a ? = ? +25 ?? c ? ) ? ( ? equivalent to 13 seconds of monthly deviation ? ) ? ?? the various detection function ? power supply voltage monitoring function ? (with selectable detection threshold ? ) ? stop detection function ? power-on reset detection function ??? equipped with alarm and timer ? timer function produces a periodic interruption signal. as for the alarm function an optional combination is produced. (date of the week , time , minute) pin function ? ? ? ? terminal connection ? ? ? ( unit : mm ) ? ? signal name input / output function ce input the chip enabled input pin. ( built -in pull-down resistance ) at the " ? h ? " ? level, access becomes possible. clk input the shift clock input pin for serial data transfer. di input the data input pin for serial data transfer. do output the data output pin for serial data transfer. fout output 32.768 ? khz ? clock output pin with the output control function ( ? n-ch open drain ? ) ? high impedance at the time of output off. / int output interrupt output ( ? n-ch open drain ? ) ?? test - ?? used by the manufacturer for testing. (do not connect externally.) ? v dd - connected to a positive power supply. gnd - connected to a ground. ?? rx ??? 4045 ? sa 1. n.c. 14. n.c. 2. clk 13. do 3. fout 12. di 4. n.c. 11. gnd 5. test 10. / ? int 6. v dd 9. n.c. 7. ce 10.1 ?? ? 0.2 5.0 7.4 ??? 0.2 3.2 ??? 0.1 1.27 8. n.c. sop ??? 14 pin ? rx ??? 4045 ? nb 1. ce 22. n.c. 2. v dd 21. n.c. 3. (gnd) 20. n.c. 4. test 19. n.c. 5. fout 18. n.c. 6. clk 17. n.c. 7. do 16. n.c. 8. di 15. n.c. 9. gnd 14. n.c. 10. / ? int 13. ??? 11. n.c. 4.8 6.3 ? max. 5.0 ??? 0.2 0.5 1.3 ??? 0.1 ? ??? ?? son ??? 22 pin ????? the metal case inside of the molding compound may be exposed on the top or bottom of this product. this purely cosmetic and does not have any effect on quality, reliability or electrical specs. s p ecifications ( characteristics ) ? ? refe r to a pp lication manual for details. ? ? recommended operating conditions item symbol conditions min. typ. max. unit power voltage v dd - 1.7 ?? 3.0 5.5 v clock voltage v clk - 1.15 3.0 5.5 v operating temperature t opr - -40 +25 +85 ? c ? ? frequency characteristics item symbol conditions rating unit frequency tolerance ?? f ? / ? f t a ? = ? +25c v dd ? = ? 3.0 ? v aa: 5 ??? 5 ?? ? 1) ac: 0 ??? 5 ?? ? 2) ?? 10 ? 6 oscillation start-up time t sta t a ? = ? +25 ? c v dd ? = ? 2.0 ? v 1 ?? max. s frequency / voltage characteristics f ? / ? v t a ? = ? +25 ? c v dd ? = ? 2.0 ? v ? to ? 5.5 ? v ?? 1 ?? max. ?? 10 ? 6 ? 1) ??? 2) ???? equivalent to 13 seconds of monthly deviation (excluding offset.) ? ? current consumption characteristics t a ? = ? -40 ?? c ? to ? +85 ?? c item symbol conditions min. typ. max. unit current consumption i bk ce ? = ? gnd fout ? ; output off (hi-z) v dd ? = ? 5 ? v ? - 0.60 1.80 a v dd ? = ? 3 ? v ? - 0.48 1.20 i 32k ce ? = ? gnd fout ? ; 32.768 ? khz output on v dd ? = ? 3 ? v ? - 0.65 2.00 a ? ? power supply detection voltage t a ? = ? -30 ?? c ? to ? +70 ?? c item symbol conditions min. typ. max. unit high-voltage mode v deth v dd pin 1.90 2.10 2.30 v low-voltage mode v detl v dd pin 1.15 1.30 1.45 v RX-4045sa RX-4045nb real time clock module (spi-bus) high-stability frequency rx ? - ? 4045 ? sa ? / ? nb ? built-in 32.768 khz crystal unit : frequency adjusted for high accuracy. ? ( ?? 5 ?? 10 ? 6 ? / ? t a ? = ? +25 ?? c) ? ? interface type : 4-wire serial interface ? operating voltage range : 1.7 ? v ? to ? 5.5 ? v ? wide timekeeper voltage range : 1.15 ? v ? to ? 5.5 ? v ? various detection functions : oscillation stop detection function etc. ? low backup current : 0.48 ?? a ?? / ?? 3 ? v ? (typ.) ? ? 32.768 khz clock frequency output : n-ch open drain output ? function of time and calendar, the various detection function, and interrupt function etc. product number (please contact us) RX-4045sa : q41404552xxxx00 RX-4045nb : q41404592xxxx00
promotion of environm ental management system conforming to international standards at seiko epson, all environmental initiatives operate under the plan-do-check-action (pdca) cycle designed to achieve continuous improvements. the environmental management system (ems) operates under the iso 14001 environmental management standard. all of our major manufacturing and non-manufacturing sites, in japan and overseas, completed the acquisition of iso 14001 certification. working for high quality in order provide high quality a nd reliable products and services than meet customer needs, seiko epson made early efforts towards obtaining iso9000 series certification and has acquired iso9001 for all business establishments in japan and abroad. we have also acquired iso/ts 16949 certification that is requested strongly by major automotive manufacturers as standard. ? explanation of the mark that are using it for the catalog ? pb free. ? complies with eu rohs directive. *about the products without the pb-free mark. contains pb in products exempted by eu rohs directive. (contains pb in sealing glass, high melting temperature type solder or other.) ? designed for automotive applications such as car multim edia, body electronics, remote keyless entry etc. ? designed for automotive applications related to drivi ng safety (engine control unit, air bag, esc etc ). seiko epson corporation notice ? this material is subjec t to change without notice. ? any part of this material may not be reproduced or duplicated in any form or any means without the written permission of seiko epson. ? the information about applied circuitry, software, usage, etc. wr itten in this material is intended for reference only. seiko epson does not assume any liability for the occurrence of infringing on any pat ent or copyright of a third party. this material does not a uthorize the licensing for any patent or intellectual copyrights. ? when exporting the products or technology described in this material, you should comp ly with the applicable export control law s and regulations and follow the procedures r equired by such laws and regulations. ? you are requested not to use the products (and any technical information furnished, if any) for the development and/or manufac ture of weapon of mass destruction or for other milit ary purposes. you are also requested that you would not make the products availabl e to any third party who may use the products for such prohibited purposes. ? these products are intended for general use in electronic equipment. when using them in s pecific applications that require ext remely high reliability, such as the applications stated below, y ou must obtain permission from seiko epson in advance. / space equipment (artificial satellites, rockets, etc.) / trans portation vehicles and related ( automobiles, aircraft, trains, vessels, etc.) / medical instruments to sustain life / submari ne transmitters / power stations and related / fire work equipmen t and security equipment / traffic control equipment / and others requiring equivalent reliability. ? all brands or product names mentioned herein are trademar ks and/or registered trademarks of their respective. iso 14000 is an international standard for environmental management that was established by the international standards organization in 1996 against the background of growing concern regarding global warming, destruction of the ozone layer, and global deforestation. iso/ts16949 is the international standard that added the sector-specific supplemental requirements for automotive industry based on iso9001.
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