8 1 8 2 real time clock module real time clock module serial real time clock module with temperature sensor rtc-4701je / nb rx-4702cf product number (please refer to page 5) q 4 1 4 7 0 1 7 x 0 0 0 2 0 0 q 4 1 4 7 0 1 9 x 0 0 0 2 0 0 q 4 1 4 7 0 2 a x x x x x 0 0 ? built-in crystal unit allows adjustment-free efficient operation. ? serial interface which can be controlled by three signal lines. ? alarm interrupt function for day of week, day, hour, and minute. ? timer interrupt function which can be set up between 1/4096 second and 255 minutes. (except for rx-4702cf) ? ovf interrupt function based on 12-bit additional counter. ? ability to detect stopping of oscillation and time update. ? built-in temperature sensor. (voltage output rtc-4701je / nb :-7.6 mv / c typ. rx-4702cf : -7.8 mv / c typ.) ? wide range of voltage between 1.6 v and 5.5 v. ? low power consumption at 0.5 a / 3 v. (typ.) ? available for lead (pb) - free soldering. ? lead (pb) - free termainal (rx-4702cf), available for lead (pb) - free terminal (rtc-4701je / nb). the details are mentioned in the application manual. specifications (characteristics) absolute max. rating item symbol condition min. max. unit supply voltage v dd v dd to gnd -0.3 +7.0 v input voltage v in input pin gnd -0.3 v dd +0.3 output voltage v out1 t _______ irq , a _______ irq , i ______ rq +8.0 v out2 f out , data v dd +0.3 storage temperature t stg stored as bare product after unpacking -55 +125 c operating range item symbol condition min. max. unit power voltage v dd ? 1.6 5.5 v clock voltage v clk ? operating temperature t opr no condensation -40 +85 c frequency characteristics item symbol condition range unit frequency tolerance f/f ta = +25 c, v dd = 3 v b: 5 23 ? x 10 -6 oscillation start up time t sta ta = +25 c, v dd = 3.0 v 3 max. s frequency temperature characteristics t op ta = -20 c to +70 c reference at +25 c +10 -120 x 10 -6 frequency voltage characteristics f/v ta = +25 c, v dd = 1.6 to 5.5 v 2 max. x 10 -6 / v aging fa ta = +25 c, v dd = 3.0 v 5 max. x 10 -6 / year ? please ask tighter tolerance. dc characteristics (gnd = 0 v, v dd = 1.6 v to 5.5 v, ta = -40 c to +85 c) item symbol condition min. typ. max. unit standby current 1 i dd1 v dd = 5 v ce, foe, s _____ off = gnd a _ _ _ _ irq , t _ _ _ _ irq , i ____ rq = vdd 32.768 khz output is off. sensor output is off. ? 1.0 2.0 a i dd2 v dd = 3 v 0.5 1.0 standby current 2 v ih ce, clk, data, foe, s ________ off 0.8 v dd ? v dd +0.3 v input voltage v il gnd -0.3 0.2 v dd output voltage 1 v oh1 v dd = 5 v i oh = -1 ma data, f out pins 4.5 ? 5.0 v v oh2 v dd = 3 v 2.0 3.0 v oh3 i oh = -100 a data, f out pins 2.9 output voltage 2 v ol1 v dd = 5 v i ol = 1 ma data, f out pins gnd gnd +0.5 v ol2 v dd = 3 v gnd +0.8 v ol3 i ol =100 a data, f out pins gnd +0.1 v ol4 v dd = 5 v i ol = 1 ma a _____ irq , t _____ irq , i ____ rq pins gnd +0.25 v ol5 v dd = 3 v gnd +0.4 external dimensions / terminal connection (unit: mm) no. 1 2 3 4 5 6 7 8 9 10 pin terminal v dd f out ce airq tirq clk data foe vtemp soff no. 20 19 18 17 16 15 14 13 12 11 pin terminal n.c n.c n.c n.c n.c n.c n.c n.c n.c gnd 1.5 max. 5.4 1.3 (0.75) (0.75) 7.0 0.3 6.0 0.2 0.65 0.22 (vsoj 20-pin) no. 1 2 3 4 5 6 7 8 9 10 11 pin terminal gnd soff vtemp foe data clk tirq airq ce f out v dd no. 22 21 20 19 18 17 16 15 14 13 12 pin terminal n.c n.c n.c n.c n.c n.c n.c n.c n.c (son 22-pin) metal may be exposed on the top or bottom of this product. this won't affect any quality, reliability or electrical spec. 6.3 max. 4.8 5.0 0.2 1.3 0.5 0.2 0.1 no. 1 2 3 4 5 pin terminal ce clk data soff gnd no. 10 9 8 7 6 pin terminal v dd vtemp irq foe fout 5.0 0.2 1.0 0.26 0.4 3.2 0.2 #10 #6 #1 #5 1.2 max. 0.6 0.35 (son 10-pin) actual size rtc-4701nb rtc-4701je temperature sensor characteristics gnd = 0 v, ta = -40 c to +85 c item symbol condition min. typ. max. unit temperature output voltage v temp ta = +25 c, gnd based output voltage vtemp pin, v dd = 2.7 v to 5.5 v 1.48 v output precision t acr ta = +25 c, v dd = 2.7 v to 5.5 v 5.0 c temperature sensitivity v se -40 c ta +85 c, v dd = 2.7 v to 5.5 v rtc-4701je / -7.1 -7.6 -8.1 mv / c rx-4702cf -7.3 -7.8 -8.3 linearity nl -40 c ta +85 c, v dd = 2.7 to 5.5 v 2.0 % output resistance ro ta = +25 c, vtemp pin, v dd = 2.7 v to 5.5 v gnd standard and v dd standard 1.0 3.0 k rtc-4701cf
8 1 8 2 real time clock module register table rtc-4701 je / nb : bank0 address register symbol bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 0 sec fos s 40 s 20 s 10 s 8 s 4 s 2 s 1 1 min fr min 40 min 20 min 10 min 8 min4 min 2 min 1 2 hour fr 0 hour 20 hour 10 hour 8 hour4 hour 2 hour 1 3 day of week fr w 6 w 5 w 4 w 3 w 2 w 1 w 0 4 day fr 0 day 20 day 10 day 8 day 4 day 2 day 1 5 month fr c 0 month 10 month 8 month 4 month 2 month 1 6 year year 80 year 40 year 20 year 10 year 8 year 4 year 2 year 1 7 minutes alarm ae a-min 40 a-min 20 a-min 10 a-min 8 a-min 4 a-min 2 a-min 1 8 hours alarm ae ? a-hr 20 a-hr 10 a-hr 8 a-hr 4 a-hr 2 a-hr 1 9 day of week alarm ae a-w 6 a-w 5 a-w 4 a-w 3 a-w 2 a-w 1 a-w 0 a day alarm ae ? a-day 20 a-day 10 a-day 8 a-day 4 a-day 2 a-day 1 b C C C C C C C C C c timer setup te ? td 1 td 0 ? ? ? ? d timer couner 128 64 32 16 8 4 2 1 e control 1 0 0 0 ti / tp af tf aie tie f control 2 0 test stop reset hold 0 0 0 rx-4702cf : bank0 address register symbol bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 b additional counter 1 128 64 32 16 8 4 2 1 c additional counter 2 fr ac1 ac0 ovf 2048 1024 512 256 d control 3 foes test1 0 0 C acie ace son e control 1 0 0 0 0 af 0 aie 0 f control 2 0 test0 stop reset hold 0 0 0 rtc-4701 je / nb : bank1 address register symbol bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 b additional counter 1 128 64 32 16 8 4 2 1 c additional counter 2 fr ac1 ac0 ovf 2048 1024 512 256 d C C C C C C C C C e C C C C C C C C C f control 3 foes test C C C acie ace son registers 0 to a are the same in bank0 and bank1. ac characteristics (gnd = 0 v, ta = -40 c to +85 c) item symbol control v dd = 3.0 v 10 % v dd = 5.0 v 10 % unit min. max. min. max. clk clock cycle t clk C 600 C 350 C ns clk h pulse width t wh 300 175 clk l pulse width t wl ce setup time t cs ce hold time t ch ce recovery time t cr 400 300 write data setup time t ds 75 50 write data hold time t dh write data disable delay time t wz 0 0 output mode switching time t do read data delay time t rd c l = 50 pf C 300 C 120 output disable time t rz c l = 50 pf r l = 10 k 200 100 rise and fall time t rf C 100 50 fout duty ratio (32.768 khz output) duty 40 60 40 60 % timing chart t ch t rf t rf t wl t clk t ds t dh d0 d1 d6 d7 d0 d6 d7 d0 d1 d6 d7 d0 d6 d7 t wz t rz t rd t wh t cs t cr ce clk d ata data read d ata data wr ite 50 % 50 % 10 % 90 % 90 % (wr ite data) (read data) f rom here the d ata pin tur ns into the output mode . (setup code , setup address) (setup code , setup address) 10 % t do block diagram v temp soff bus interf ace circuit f out controller divider t emperature sensor f out d ata clk f oe ce tirq irq airq cloc k and calendar timer register alar m register control register and system controller degital tr imming register interr upts controller osc 32.768 khz control line 4701je/nb 4701je/nb 4702cf
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