real time clock module actual size ? block diagram ? ? ? ? overview ? ? bus interface circuit ce 1 clk data 32.768 khz ce 0 control register shift register a larm register timer register clock and calendar interrupts controller output controller divider control line fout / tirq / airq osc fcon ?? 32.768 khz frequency output function ? fout pin output (c-mos output), cl=30 pf ? output frequency is selectable from 1/30 ? hz ? to ? 32.768 ? khz (32 values) ?? timer function ? timer function which can be set up between 1/4096 second and 255 minutes. ? it is recorded automatically to tf-bit at the time of event occurrence, and it?s possible to output with /tirq pin output (open-drain output). ? selectable one time mode or repeat mode. ?? alarm function ? alarm function can be set to any combination of day of week, hour, or minute. ?it is recorded automatically to af-bit at the time of event occurrence, and it?s possible to output with /airq pin output (open-drain output). ?? functions are compatible with rtc-4574 ? sa ? / ? je ? / ? nb. pin function ? ? ? ? terminal connection ? / external dimension s ? ( unit:mm ) ? signal name input / output function ce0 input the chip enabled input pin 0. (built-in pull-down resistance) when both ce0 and ce1 pins are at the ?h? level , access to this real time clock module becomes possible. ce1 input the chip enabled input pin 1. when the ce1 pin is at the high level, the fout pin is in the output state. clk input the shift clock input pin for serial data transfer. data bi-directional the data input / output pin for serial data transfer. fout output this pin outputs the reference clock signal at 32.768 khz ( c-mos output ). high impedance at the time of output off. fcon input the input pin for the fout output control. / airq output the open drain output pin for alarm and time update interrupts. / tirq output the open drain output pin for timer interrupt. v dd - connected to a positive power supply. gnd - connected to a ground. rx ??? 4574 ? lc 1. n.c. 12. v dd 2. n.c. 11. ce1 3. / ? tirq 10. clk 4. / ? airq 9. data 5. fcon 8. ce0 6. fout 0.5 2.4 3.6 1.2 ? max. ? 2.8 7. gnd vsoj ??? 12pin s p ecifications ( characteristics ) ? refer to a pp lication manual for details. ? ? recommended operating conditions item symbol conditions min. typ. max. unit power voltage v dd - 1.6 3.0 5.5 v clock voltage v clk - 1.3 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 ? = ? +25 ?? c v dd ? = ? 3.0 ? v ?? b: 5 ??? 23 ? * ?? 10 ? 6 oscillation start-up time t sta t a ? = ? +25 ?? c v dd ? = ? 1.6 ? v 1 ?? max. s t a ? = ? -40 ?? c ? to ? +85 ? ? c v dd ? = ? 1.6 ? v 3 ?? max. s *equivalent to 1 minute of monthly deviation ? ? current consumption characteristics ? t a ? = ? -40 ?? c ? to ? +85 ?? c item symbol conditions min. typ. max. unit current consumption i bk ce0, ? ce1 ? = ? gnd fout ? ;output off ? ( ? hi ? - ? z ? ) v dd ? = ? 5 ? v ? - 0.45 0.9 a v dd ? = ? 3 ? v ? - 0.35 0.7 i 32k ce0 ? = ? gnd ce1 ? = ? v dd fout ? ; 32.768 ? khz output on cl ? = ? 30 ? pf v dd ? = ? 5 ? v ? - 8.0 20.0 a v dd ? = ? 3 ? v ? - 5.0 12.0 real time clock module (spi-bus) rx - 4574 ? lc ? built in frequency adjusted 32.768 khz crystal unit. ? interface type : 3-wire serial interface ? operating voltage range : 1.6 ? v ? to ? 5.5 ? v ? wide timekeeper voltage range : 1.3 ? v ? to ? 5.5 ? v ? low backup current : 0.35 ?? a ?? / ?? 3 ? v ? (typ.) ? ? 32.768 khz frequency output function : c-mos output with control pin ? the various functions include fu ll calendar, alarm, timer. product number (please contact us) RX-4574LC : q414574c2000300 *stop using the glue any glue must never use it after soldering lc-package to a circuit board.this product has glass on the back side of a package.when glue invasions between circuit board side and glass side, then glass cracks by thermal expansion of glue.in this case a crystal oscillation stops.consider glue abolition or glue do not touch to lc-package
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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