Real time clock module Product Number (Please contact us) RX-4045SA : Q41404552xxxx00 RX-4045NB : Q41404592xxxx00 High-Stability Frequency SERIAL-INTERFACE REAL TIME CLOCK MODULE RX-4045SA/NB Built-in 32.768 kHz crystal unit : Frequency adjusted for high accuracy. (5106/Ta=+25C) Interface Type : 4-wire serial interface Operating voltage range : 1.7Vto5.5V Wide Timekeeper voltage range : 1.15Vto5.5V Various detection Functions : Oscillation stop detection function etc. Low backup current : 0.48A/3V(Typ.) 32.768 kHz clock frequency output : N-ch open drain output Function of time and calendar, the various detection function, and interrupt function etc. Actual size RX-4045SA RX-4045NB Block diagram Overview Features built-in 32.768kHz crystal unit 32kHz OUTPUT CONTROL COMPARATOR_W ALARM_D REGISTER (MIN,HOUR) COMPARATOR_D TIME COUNTER (SEC,MIN,HOUR,WEEK,DAY,MONTH,YEAR) DIV OSC DETECT INTERRUPT CONTROL CLK Input DI Input DO Output FOUT Output / INT Output TEST - Timer function produces a periodic interruption signal. DO As for the Alarm function an optional combination is produced. (Date of the week , time , minute) CE RX4045SA Function The chip enabled input pin. ( built -in pull-down resistance ) At the "H"level, access becomes possible. The shift clock input pin for serial data transfer. 1. N.C. 2. CLK The data input pin for serial data transfer. 3. FOUT The data output pin for serial data transfer. 4. N.C. 32.768kHzclock output pin with the output control function (N-ch open drain) High impedance at the time of output off. 5. TEST Interrupt output VDD - Used by the manufacturer for testing. (Do not connect externally.) Connected to a positive power supply. GND - Connected to a ground. RX4045NB 14. N.C. 6. VDD 7. CE 1. CE 2. VDD 22. N.C. 21. N.C. 20. 19. N.C. N.C. 13. DO 3. (GND) 12. DI 4. TEST 5. FOUT 18. N.C. 11. GND 6. CLK 17. N.C. 10. /INT 7. DO 16. N.C. 8. DI 15. N.C. 14. N.C. 13. 12. 5.0 (N-ch open drain) (Unit:mm) 7.40.2 9. N.C. 9. GND 8. N.C. 10. /INT 11. N.C. SOP14 pin 6.3Max. Input Equipped with alarm and timer DI Terminal connection/External dimensions Input / Output CE I/O CONTROL 0.5 Signal Name GND SHIFT REGISTER Pin function Power supply voltage monitoring function (with selectable detection threshold) Stop detection function Power-on reset detection function CLK ADDRESS REGISTER ADDRESS DECODER The various detection Function 10.1 0.2 /INT VOLTAGE DETECT 3.20.1 OSC DIVIDER CORREC -TION Frequency adjusted forhigh accuracy (5106 /Ta=+25C) (Equivalent to 13 seconds of monthly deviation) VDD 1.27 FOUT ALARM_W REGISTER (MIN,HOUR, WEEK) 4.8 1.30.1 5.00.2 SON22 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) Current consumption characteristics Recommended Operating Conditions Item Power voltage Clock voltage Operating temperature Symbol Condition Min. Typ. Max. Unit VDD VCLK - 1.7 1.15 3.0 3.0 5.5 5.5 V V TOPR - -40 +25 +85 C Symbol Frequency tolerance f/f Oscillation start-up time tSTA Frequency / voltage characteristics f/V Symbol Condition CE=GND IBK FOUT;output OFF (Hi-z) Current Consumption Frequency characteristics Item Item CE=GND Condition Ta=+25C VDD=3.0V Ta=+25C VDD=2.0V Ta=+25C VDD=2.0Vto5.5V Rating AA: 551) AC: 052) I32k Unit 10 FOUT;32.768kHz output ON Ta=40Cto+85C Min. Typ. Max. VDD =5V 0.60 1.80 VDD =3V 0.48 1.20 VDD =3V 0.65 2.00 Unit A A 6 1Max. s 1Max. 106 Power supply detection voltage Item Ta=30Cto+70C Symbol Condition Min. Typ. Max. Unit High-voltage mode VDETH VDD pin 1.90 2.10 2.30 V Low-voltage mode VDETL VDD pin 1.15 1.30 1.45 V 1)2) Equivalent to 13 seconds of monthly deviation (excluding offset.)