RX-8025SA:AC0

Real time clock module High-Stability I2C-Bus INTERFACE REAL TIME CLOCK MODULE RX - 8025 SA / NB • Built-in 32.768 kHz quartz oscillator : Frequency adjusted for high accuracy (± 5 ×10−6 / Ta = +25 °C) • Interface Type : I2C-Bus Interface (400 kHz) • Operating voltage range : 1.70 V to 5.5 V • Wide Timekeeper voltage range : 1.15 V to 5.5 V • Various detection Functions : Ex. Oscillation stop detection function • Low backup current : 0.48 µA / 3 V (Typ.) Actual size • 32.768 kHz frequency output function : C-MOS output With Control Pin RX-8025SA • The various functions include full calendar, alarm, timer. • Lead(Pb)-free : Contains high melting temperature type solder (Pb85 %) exempted by RoHS directive. * The I2C-Bus is a trademark of Philips Electronics N.V. RX-8025NB Block diagram Overview • Features built-in 32.768 kHz quartz oscillator FOUT FOE Alarm_W Register ( Min,Hour,Week ) Comparator_W 32 kHz Output Control Alarm_D Register ( Min,Hour ) Comparator_D Divider Correc -tion OSC Div. • The various detection function • Power supply voltage monitoring function (with selectable detection threshold ) • Stop detection function • Power-on reset detection function Time Counter ( Sec,Min,Hour,Week,Day,Month,Year ) Address Decoder OSC Detect • Alarm function and Timer function Address Register Interrupt Control • Timer function produces a periodic interruption signal. As for the Alarm function an optional combination is produced. (Date of the week , time , minute) SCL I/O Control / INTA • Frequency adjusted for high accuracy. ( ± 5 ×10−6 / Ta = +25 °C ) ( Equivalent to 13 seconds of monthly deviation ) VDD Voltage Detect SDA Shift Register / INTB GND FOE Output FOE input L Input /CLEN1 bit X 0 0 1 1 H /CLEN2 bit X 0 1 0 1 FOUT output OFF ( LOW ) 32.768 kHz 32.768 kHz 32.768 kHz OFF(LOW) / INTA Output Interrupt output A pin ( N-ch open drain ) / INTB Output Interrupt output B pin ( N-ch open drain ) TEST - VDD - ∗ Used by the manufacture for testing. (Do not connect externally.) Connected to a positive power supply. GND - Connected to a ground. N.C. 2. SCL 3. FOUT 4. N.C. RX − 8025 NB 14. 10.1 ± 0.2 FOUT 1. FOUT pin is 32.768 kHz clock output pin (C-MOS) that output control is possible. N.C. TEST 6. VDD 7. FOE 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 ∗1) ∗2) ∆f/f tSTA f/V N.C. 20. 19. N.C. N.C. (GND) 12. / INTB 4. TEST 5. FOUT 18. N.C. 11. GND 6. SCL 17. N.C. / INTA 7. SDA 16. N.C. 8. / INTB 15. N.C. 14. N.C. 10. 7.4 ± 0.2 9. N.C. 9. GND 8. N.C. 10. / INTA 11. N.C. 4.8 1.3 ± 0.1 5.0 ± 0.2 13. − 12. − SON − 22 pin Item Symbol Condition Ta = +25 °C VDD = 3.0 V Ta = +25 °C VDD = 2.0 V Ta = +25 °C VDD = 2.0 V to 5.5 V Range IBK AA: 5 ± 5 AC: 0 ± 5 I32k Unit ∗1) ∗2) 1 Max. ± 1 Max. × 10−6 Min. VDD =5V VDD =3V FOE = GND FOUT ; output OFF(LOW) fSCL = 0Hz VDD VDD, FOE = 5.5 V = 5.5 V FOUT ; output ON ( Output=OPEN; CL = 0 pF ) −6 Item Typ. Max. 0.60 1.80 0.48 1.20 3.0 6.5 Unit µA „ Power supply detection voltage s × 10 Ta = −40 °C to +85 °C Condition fSCL = 0Hz Curent Consumption Equivalent to 13 seconds of monthly deviation (excluding offset). 116 N.C. 21. 3. „ DC characteristics Condition „ Frequency characteristics Frequency tolerance Oscillation start-up time Frequency voltage characteristics 22. ∗ Refer to application manual for details. Symbol Symbol VDD Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. „ Recommended Operating Conditions Item 2. SDA Specifications (characteristics) Power voltage Clock voltage Operating temperature FOE SOP − 14 pin . Item 1. 13. 5.0 5. (Unit:mm) 0.5 RX − 8025 SA Function Input Serial clock input pin Bi-directional Data input and output pin 3.2 ± 0.1 Input / output 1.27 Signal Name SCL SDA Terminal connection / External dimensions 6.3 Max. Pin Function µA Ta = −30 °C to +70 °C 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 http://www.epsontoyocom.co.jp