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RX-8025SA Datasheet(PDF) 1 Page - Epson Company |
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RX-8025SA Datasheet(HTML) 1 Page - Epson Company |
1 / 2 page Actual size Real time clock module Block diagram Overview OSC OSC Detect / INTA SCL SDA FOUT FOE 32 kHz Output Control Divider Correc -tion Div. Interrupt Control / INTB Shift Register Time Counter ( Sec,Min,Hour,Week,Day,Month,Year ) Address Decoder Address Register Comparator_D Comparator_W Alarm_W Register ( Min,Hour,Week ) I/O Control Alarm_D Register ( Min,Hour ) Voltage Detect GND VDD Features built-in 32.768kHz crystal unit • Frequency adjusted for high accuracy. ( 5106 / Ta=+25C) ( Equivalent to 13 seconds of monthly deviation) The various detection function • Power supply voltage monitoring function (with selectable detection threshold) • Stop detection function • Power-on reset detection function Alarm function and Timer function • Timer function produces a periodic interruption signal. As for the Alarm function an optional combination is produced. (Date of the week , time , minute) Pin Function Terminal connection /External dimensions (Unit:mm) Signal Name Input / output Function SCL Input Serial clock input pin SDA Bi-directional Data input and output pin FOUT Output FOE Input 32.768 kHzclock output pin with the output control function. (C-MOS) FOE input /CLEN1 bit /CLEN2 bit FOUT output L X X OFF ( LOW) 0 0 32.768 kHz 0 1 32.768 kHz 1 0 32.768 kHz H 1 1 OFF(LOW) / INTA Output Interrupt output A pin ( N-ch open drain) / INTB Output Interrupt output B pin ( N-ch open drain) TEST - Used by the manufacture for testing. (Do not connect externally.) VDD - Connected to a positive power supply. GND - Connected to a ground. RX 8025SA 1. N.C. 14. N.C. 2. SCL 13. SDA 3. FOUT 12. / INTB 4. N.C. 11. GND 5. TEST 10. / INTA 6. VDD 9. N.C. 7. FOE 5.0 7.40.2 8. N.C. SOP 14 pin RX 8025NB 1. FOE 22. N.C. 2. VDD 21. N.C. 3. (GND) 20. N.C. 4. TEST 19. N.C. 5. FOUT 18. N.C. 6. SCL 17. N.C. 7. SDA 16. N.C. 8. / INTB 15. N.C. 9. GND 14. N.C. 10. / INTA 13. 11. N.C. 1.30.1 4.8 5.00.2 12. SON22 pin The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs. Specifications (characteristics) Refer to application manual for details. . Recommended Operating Conditions Item Symbol Conditions Min. Typ. Max. Unit Power voltage VDD - 1.7 3.0 5.5 V Clock voltage VCLK - 1.15 3.0 5.5 V Operating temperature TOPR - -40 +25 +85 C Frequency characteristics Item Symbol Conditions Range Unit Frequency tolerance f/f Ta =+25C VDD =3.0V AA: 5 51) AC: 0 52) 106 Oscillation start-up time tSTA Ta =+25C VDD =2.0V 1 Max. s Frequency voltage characteristics f /V Ta =+25C VDD =2.0Vto5.5V 1Max. 106 1)2)Equivalent to 13 seconds of monthly deviation (excluding offset). Current consumption characteristics Ta =-40C to +85C Item Symbol Conditions Min. Typ. Max. Unit Curent Consumption IBK fSCL=0Hz FOE =GND FOUT ;output OFF(LOW) VDD = 5V - 0.60 1.80 µA VDD = 3V - 0.48 1.20 I32k fSCL=0Hz VDD, FOE=5.5V FOUT ;output ON ( Output=OPEN; CL =0pF) VDD = 5.5V - 3.0 6.5 µA Power supply detection voltage Ta =-30C to +70C Item Symbol Conditions 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 RX-8025SA RX-8025NB REAL TIME CLOCK MODULE (I 2C-Bus) High-Stability RX - 8025SA/NB Built-in 32.768 kHz crystal unit : Frequency adjusted for high accuracy ( 5106/Ta=+25C) Interface Type : I 2C-Bus Interface (400kHz) Operating voltage range: 1.70Vto5.5V Wide Timekeeper voltage range : 1.15 Vto5.5V Various detection Functions : Ex. Oscillation stop detection function Low backup current : 0.48 A/3V(Typ.) 32.768 kHz frequency output function : C-MOS output With Control Pin The various functions include full calendar, alarm, timer. * The I 2C-Bus is a trademark of NXP Semiconductors Product Number (Please contact us) RX-8025SA : Q41802552xxxx00 RX-8025NB : Q41802592xxxx00 |
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