actual size real time clock module block diagram ? ? ? ? overview ? ? i nterrupt s contro ller a larm regi ste r / int bus interf ace circui t ( 3 2. 768 khz ) contro l r egister and system control le r divi der clock power contro lle r and sda vdd scl c a lend r ti me r regi ste r dtcxo vb a t contro lle r fou t fout foe ? ? high stability ? ua 3.4 x 10 -6 / -40 oc to +85 oc ( equivalent to 9 seconds of month deviation ) ? ub 5.0 x 10 -6 / -40 oc to +85 oc ( equivalent to 13 seconds of month deviation ) ? uc 5.0 x 10 -6 / -30 oc to +70 oc ( equivalent to 13 seconds of month deviation ) ? 32.768 khz frequency output function ? fout pin output (c-mos output), cl=30 pf ? output selectable: 32.768 khz, 1024 hz, 1 hz ?? available automatic battery backup switch-over function ? ? when v dd deteriorates, internal source is switched to v bat. ? ? a very small leakage current ?? timer function ? ? timer function can be set up between 1/4096 second and 4095 minutes. ?? alarm function ? ? alarm function can be set to day of week, day, hour, and minute. ?? temp. sensor function ? the temperature data are output to a register by a temp. sensor function. (bank.2_add17h) pin function ? ? ? ? terminal connection ? ? ? ? ( uni t :mm ) ? ? 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 ) ? ? real time clock module (i 2 c-bus) built-in 32.768 khz-dtcxo, high stability and power switching rx 8900 sa ? / ? ce ? ? built in frequency adjusted 32.768 khz crystal unit and dtcxo. ? interface type : i 2 c-bus interface (400khz) ? interface voltage range : 2.5 v to 5.5 v ? temp. compensated voltage range : 2.0 v to 5.5 v ? clock supply voltage range : 1.6 v to 5.5 v ? selectable clock output (32.768 khz, 1024 hz, 1 hz) ? the various functions include full calendar, alarm, timer, temp. sensor function. .epson is prepared linux driver for this product. ( http://www5.epsondevice.com/en/quar tz/tech/linux_for_rtc/index.html ) the registered trademark linux? is used pursuant to a sublicense from lmi(linux mark institute) the i 2 c-bus is a trademark of nxp semiconductors. signal name i / o function t1(ce) input use by the manufacture for testing. ( do not connect externally.) scl input serial clock input pin. fout output the pin outputs the reference clock signal. ( cmos output ) v bat - battery supply. this pin has charge capability to backup battery. v dd - connected to a positive power supply foe input the input pin for the fout output control. / int output interrupt output (n-ch. open drain). gnd - connected to a ground t2(v pp ) - use by the manufacture for testing. ( do not connect externally.) sda i/o data input and output pin. ? ? electrical characteristics item symb ol conditions min. typ. max. unit operating voltage v dd ? interface voltage 2.5 3.0 5.5 v temp. compensated voltage v tem temp. compensated voltage 2.0 3.0 5.5 v clock supply voltage v clk internal clock 1.6 3.0 5.5 v operating temperature t opr no condensation -40 +25 +85 oc stability ?? f ? / ? f ua ta ? = -40 oc to +85 oc 3.4 ? ? 1 ?? 10 -6 ub ta ? = ? -40 oc to +85 oc 5.0 ? ? 2 uc ta ? = -30 oc to +70 oc current consumption (1) i dd 1 fscl=0hz, /int=v dd , foe =gnd v dd =v bat fout: off temp. compensation interval 2.0 s. v dd = 5v - 0.72 1.5 ? a current consumption (2) i dd 2 v dd = 3v - 0.70 1.4 ?? ? 1 ? ) equivalent to 9 seconds of month deviation. ? ? 2 ? ) ? equivalent to 13 seconds of month deviation. product number (please contact us) RX8900SA: x1b000292xxxx00 rx8900ce: x1b000301xxxx00 RX8900SA rx8900ce ? ? 32.768 khz-dtcxo frequency temperature characteristics (example) frequency temperature characteristics -30 -25 -20 -15 -10 -5 0 5 10 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 temperature (oc) frequency tolerance ( 10 - 6 ) tuning fork x'tal 32.768 khz dtcxo rx8900ce 1. foe 10. /int 2. vdd 9. gnd 3. vbat 8. t2(vpp) 4. fout 7. sda 5. scl 6. t1(ce) 2.5 0.2 3.2 0.2 ? 1.0max. ? RX8900SA 1. t1(ce) 10.1 ?? ? 0.2 5.0 7.4 ??? 0.2 3.2 ??? 0.1 1.27 14. n.c. 2. scl 13. sda 3. fout 12. t2(v pp ) 4. n.c. 11. gnd 5. v bat 10. / ? int 6. v dd 9. n.c. 7. foe 8. n.c. ?? sop ??? 14 pin RX8900SA (10.1 7.4 3.3 mm) rx8900ce (3.2 2.5 1.0 mm) ce
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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