Real time clock module Epson Toyocom Product Number (Please contact us) RTC-4574SA : Q41457451000200 RTC-4574JE : Q41457471000100 RTC-4574NB : Q41457491000100 SERIAL-INTERFACE REAL TIME CLOCK MODULE RTC - 4574 SA / JE / NB *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 : 1.6 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. Actual size RTC-4574SA Block diagram RTC-4574JE RTC-4574NB Overview 32.768 kHz CONTROL LINE OSC * 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) CLOCK and DIVIDER CALENDAR * Timer function FOUT FCON / TIRQ OUTPUT CONTROLLER TIMER INTERRUPTS ALARM CONTROLLER / AIRQ * Timer function 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. REGISTER REGISTER * Alarm function DATA * 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). CONTROL REGISTER BUS CLK INTERFACE CE 1 CIRCUIT CE 0 SHIFT REGISTER Functions are compatible with RX - 4574 LC. Terminal connection / External dimensions 3. N.C. 4. N.C. 13. CE1 12. DATA 11. CLK 5.0 N.C. 6. N.C. 7. VDD 10. 3.2 0.1 5. 7.4 0.2 / TIRQ 9. / AIRQ 8. CE0 2. FOUT 3. CE0 4. / AIRQ RTC - 4574 NB 20. N.C. 1. GND 19. N.C. 2. FCON 18. N.C. 3. N.C. 17. N.C. 4. CE1 5. DATA 18. N.C. 6. CLK 17. N.C. 7. / TIRQ 16. N.C. 8. / AIRQ 9. CE0 5. / TIRQ 16. N.C. 6. CLK 15. N.C. 7. DATA 14. N.C. 8. CE1 13. N.C. 9. FCON 10. 5.4 1.5 Max. 6.0 0.2 GND SOP - 14 pin 12. N.C. 10. FOUT 11. N.C. 11. VDD VSOJ - 20 pin 0.5 VDD 0.65 1. 6.3 Max. FOUT FCON 7.0 0.3 2. RTC - 4574 JE 14. 10.1 0.2 GND 1.27 RTC - 4574 SA 1. (Unit:mm) 4.8 1.3 0.1 5.0 0.2 22. N.C. 21. N.C. 20. N.C. 19. N.C. 15. N.C. 14. N.C. 13. - 12. - SON - 22 pin Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. Refer to application manual for details. Specifications (characteristics) Recommended Operating Conditions Item Power voltage Clock voltage Operating temperature Current consumption characteristics Symbol Condition Min. Typ. Max. Unit VDD VCLK - 1.6 1.6 3.0 3.0 5.5 5.5 V V TOPR - -40 +25 +85 C Frequency characteristics Item Frequency tolerance Oscillation start-up time Symbol f/f tSTA Condition = +25 C VDD = 3.0 V Ta Ta = +25 C VDD = 1.6 V Rating Unit 5 23 x 10-6 3 Max. Item Symbol IBK Current Consumption I32k s Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation) http://www.epsontoyocom.co.jp Ta = -40 C to +85 C Condition Min. Typ. Max. CE0, CE1 = GND VDD =5V 1.0 2.0 FOUT ;output OFF ( Hi - z ) VDD =3V 0.5 1.0 CE0 = GND CE1 = VDD VDD =5V 8.0 20.0 FOUT ; 32.768 kHzoutput ON CL = 30 pF VDD =3V 5.0 12.0 Unit A A