a ctual size http://www.epsontoyocom.co.jp real time clock module 112 block dia g ram ? ? ? ? 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 selectable from1/30 hz to 32.768 khz (32 values) ? timer function ? timer function can be set upbetween 1/4096 second and 255 minutes. ? it is recorded automatic to tf-bit at the time of event occurrence,and 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 automatic to af-bit at the time of event occurrence,and possible to output with /airq pin output (open-drain output). ? functions are compatible with rx - 4574 lc. terminal connection / external dimensions ? ( unit:mm ) ? rtc ? 4574 sa 1. gnd 14. fcon 2. fout 13. ce1 3. n.c. 12. data 4. n.c. 11. clk 5. n.c. 10. / tirq 6. n.c. 9. / airq 7. v dd 10.1 0.2 5.0 7.4 0.2 3.2 0.1 1.27 8. ce0 sop ? 14 pin rtc ? 4574 je 1. v dd 20. n.c. 2. fout 19. n.c. 3. ce0 18. n.c. 4. / airq 17. n.c. 5. / tirq 16. n.c. 6. clk 15. n.c. 7. data 14. n.c. 8. ce1 13. n.c. 9. fcon 12. n.c. 10. gnd 7.0 0.3 5.4 6.0 0.2 1.5 max. 0.65 11. n.c. vsoj ? 20 pin rtc ? 4574 nb 1. gnd 22. n.c. 2. fcon 21. n.c. 3. n.c. 20. n.c. 4. ce1 19. n.c. 5. data 18. n.c. 6. clk 17. n.c. 7. / tirq 16. n.c. 8. / airq 15. n.c. 9. ce0 14. n.c. 10. fout 13. ? 11. v dd 4.8 6.3 max. 5.0 0.2 0.5 1.3 0.1 12. ? son ? 22 pin metal may be exposed on the top or bottom of this product. this w ill not affect any quality, reliability or electrical spec. s p ecifications ( characteristics ) ? refer to a pp lication manual for details. ? recommended operating conditions item symbol condition min. typ. max. unit power voltage v dd - 1.6 3.0 5.5 v clock voltage v clk - 1.6 3.0 5.5 v operating temperature t opr - ? 40 +25 +85 c ? frequency characteristics item symbol condition rating unit frequency tolerance ? f / f t a = +25 c v dd = 3.0 v 5 23 ? 10 ? 6 oscillation start-up time t sta t a = +25 c v dd = 1.6 v 3 max. s ? please ask for tighter tolerance.( equivalent to 1 minute of monthly deviation) ? dc characteristics t a = -40 c to +85 c item symbol condition min. typ. max. unit v dd = 5 v 1.0 2.0 i bk ce0, ce1 = gnd fout ;output off ( hi - z ) v dd = 3 v 0.5 1.0 a v dd = 5 v 8.0 20.0 current consumption i 32k ce0 = gnd ce1 = v dd fout ; 32.768 khzoutput on cl = 30 pf v dd = 3 v 5.0 12.0 a serial-interface real time clock module rtc - 4574 sa / je / nb ? built in frequency adjusted 32.768 khz crystal unit. ? interface type : serial interface in 3 lines form. ? operating voltage range : 1.6 v to 5.5 v ? wide timekeeper voltage range : 1.6 v to 5.5 v ? low backup current : 0.5 a / 3 v ( typ. ) ? 32.768 khz frequency output function : c-mos output with control pin ? the various functions include full calendar, alarm, timer. ? lead(pb)-free : contains high melting temperature type solder (pb85 %) exempted by rohs directive. rtc-4574je rtc-4574nb rtc-4574sa
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