53 real time clock module absolute max. rating specifications (characteristics) operating range frequency characteristics dc characteristics external dimensions (unit: mm) r4543 b 607 6a e 7.4 0.2 3.2 0.1 5.0 3.1 10.1 0.2 terminal connection 0.15 0.6 0.05 min. no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 4543sa gnd n.c ce f sel wr f oe n.c n.c v dd clk data n.c n.c f out ? ? ? ? 4543sb n.c n.c n.c n.c f oe wr f sel ce gnd f out data clk n.c v dd n.c n.c n.c n.c 1234567 14 13 12 11 10 9 8 123456 18 17 16 15 14 13 7 12 8 11 9 10 0? to 10? RTC-4543sa RTC-4543sa (sop 14-pin) RTC-4543sb RTC-4543sb (sop 18-pin) 0.4 1.27 7.8 0.2 2.0 max. 5.4 1.8 11.4 0.2 0.15 0.6 0.05 min. 0? to 10? r4543 b 6076a e ? built-in crystal unit allows adjustment-free efficient operation. ? automatic leap year correction. ? output selectable between 32.768 khz/1 hz. ? operating voltage range: 2.5v to 5.5v. ? supply voltage detection voltage: 1.7?.3v. ? low current consumption: 1.0 ?/2.0v (max.) serial-interface real time clock module RTC-4543sa / sb item power source voltage input voltage output voltage storage temperature symbol v dd v in v out t stg condition v dd -gnd min. -0.3 -55 max. 7.0 v dd +0.3 +125 unit v ?c item operating voltage date holding voltage operating temperature symbol v dd v clk t opr condition min. 2.5 1.4 -40 max. 5.5 +85 unit v ?c item frequency tolerance frequency temperature characteristics frequency voltage characteristics oscillation start time aging symbol d f/fo t op f v t osc fa condition ta=25?c, v dd =5v -10 to +70?c ta=25?c, v dd =2.0 to 5.5v ta=25?c, v dd =2.5v first year ta=25?c, v dd =5v range 5?3 +10/-120 ? 3 ? unit ppm ppm/v s ppm/year item ??input voltage ??input voltage input off-leak current ??output voltage ??output voltage output leak current supply detection voltage output load conditions current consumption symbol v ih v il i off v oh1 v oh2 v ol1 v ol2 i ozh i ozl v dt c l n i dd1 i dd2 i dd3 i dd4 i dd5 i dd6 1 2 3 4 5 6 condition min. typ. max. unit v dd =5.0v v dd =3.0v v dd =5.0v v dd =3.0v v out =5.5v v out =0v i oh =-1.0 ma data, f out pins i ol =1.0 ma data, f out pins ce="l", f oe ="l" f sel ="h" ce="l", f oe ="h" f sel ="l" no load on the f out pin data, f out pins f out pin 30 pf(max.) 2ls-ttl 1.7 v dd =5.0v v dd =3.0v v dd =2.0v v dd =5.0v v dd =3.0v v dd =2.0v 1.5 1.0 0.5 4.0 2.5 1.5 3.0 2.0 1.0 10.0 6.5 4.0 wr, data, ce, clk, f oe ,f sel pins wr, ce, clk, f oe ,f sel pins 0.8v dd 4.5 2.5 -1.0 1.4 0.2v dd 0.5 0.5 0.8 1.0 2.0 v m a m a m a v v (v dd =5v?.5v, ta=-40 to +85?c) actual size
54 real time clock module fdt msb seconds (0 to 59) s 40 s 20 s 10 s 8 s 4 s 2 s 1 * minutes (0 to 59) mi 40 mi 20 mi 10 mi 8 mi 4 mi 2 mi 1 * hour (0 to 23) * h 20 h 10 h 8 h 4 h 2 h 1 day of the week (1 to 7) * w 4 w 2 w 1 * day (1 to 31) * d 20 d 10 d 8 d 4 d 2 d 1 tm month (1 to 12) * * mo 10 mo 8 mo 4 mo 2 mo 1 y 80 year (0 to 99) y 40 y 20 y 10 y 8 y 4 y 2 y 1 fdt bit: supply voltage detection bit. tm bit: test bit always set this bit to "0". switching characteristics block diagram register table timing chart 32.768 khz f out clk wr ce f sel f oe data (ta=-40 to +85?c, c l =50 pf) output controller i/o controller control circuit voltage detecter divider oscillator clock and calendar shift register f oe f out f out data clk ce wr data clk ce wr v il v ih enabled high impedance disabled t xz t f 2 t sd t hd t data t clkh t clkh t ces t ces t clk t clk t wrs t wrs t r1 t ce t ce t f1 t r1 t f1 t ceh t oz t ceh t rcv t rcv t wrh t wrh t clkl t clkl t r2 t t h t zx duty= x 100 t t h [%] data read data write f out disabled and enabled item clk clock cycle clk high pulse width clk low pulse width ce setup time ce hold time ce enable time write data setup time write data hold time wr setup time wr hold time data output delay time data output floating time clock input rise time clock input fall time f out rise time f out fall time disable time enable time f out duty ratio wait time symbol t clk t clkh t clkl t ces t ceh t ce t sd t hd t wrs t wrh t data t dz t r1 t f1 t r2 t f2 t xz t zx duty t rcv min. 0.75 0.375 0.1 100 40 0.95 max. 7800 3900 0.9 0.2 0.1 50 100 60 min. 1.5 0.75 0.2 0.1 100 40 1.9 max. 7800 3900 0.9 0.4 0.2 100 200 60 unit m s s m s ns m s ns % m s c l = 30pf v dd = 5v 10% v dd = 3v 10%
86 epson seiko epson corporation electronics device & components marketing div. 3f od bldg.421-8 hino,hino-shi,tokyo,191-8501 dec.28,1998 re :the year 2000 readiness disclosure for real time clock module dear valued customer: 1. our rtc products do not have counters of the four-digit year. 2. in other words, there are two categories regarding the counter construction. a: year counter consists of the bottom two digits of the four-digit year .(rtc shown in appendix a) or b: year counter consists of one digit and it is available with zero to three (ie,0,1,2,3) (rtc shown in appendix b) this counter is incremented every year (it will go to 0 after 3). initial setting of the year counter is required as follows; leap year ; set "0" to the year counter leap year +1 ; set "1" leap year +2 ; set "2" year before leap year ; set "3" 3. the years having multiples of four or having 00 are recognized as a leap year. (rtc shown in appendix a ) 4. the years having 0 in the year counter are recognized as a leap year.(rtc shown in appendix b) 5. for your information, year 2000 is a leap year, however, 1900 or 2100 is not a leap year. (usually, multiples of a hundred is not a leap year, but a leap year comes every 400 years.) in terms of a leap year recognition, our rtc products will work correctly until 2099. you are requested to prepare for so-called year 2000 issue by yourself in conjunction with the above rtc products. you need to make or modify your own program algorithm accordingly based on the above information. if you do not, the above rtc products may not work appropriately. if you have any questions regarding this matter, please contact a nearest sales office or representatives appendix a rtc45xx,rtc58xxx,rtc62xxx,rtc63xxx,rtc64xxx,rtc65xxx,rtc72xxx series and rtc8563 appendix b rtc-8583,rtc8593 sincerely yours, y2k project electronics device & components marketing div. this letter is to inform you of the operation of our real time clock module (rtc) products with respect to so-called year 2000 issue. please refer to the following information. in addition, information concerning year 2000 readiness disclosed herein constitutes a year 2000 readiness disclosure as that term is defined in the year 2000 information and readiness disclosure act, u.s. p.l. 105-271. nothing in this disclosure shall be deemed to amend the terms of any contract or warranty unless otherwise expressly agreed by seiko epson corporation.
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