Epson Toyocom Real time clock module Product Number (Please contact us) RX-8801SA : X1B000011xxxx00 RX-8801JE : X1B000031xxxx00 Built-in 32.768 kHz-DTCXO, High Stability I2C-Bus INTERFACE REAL TIME CLOCK MODULE RX - 8801 SA / JE •Built in frequency adjusted 32.768 kHz crystal unit and DTCXO. •Interface Type : I2C-Bus Interface (400 kHz) •Interface voltage range : 1.6 V to 5.5 V •Temp.compensated voltage range: 2.2 V to 5.5 V •Wide Timekeeper voltage range : 1.6 V to 5.5 V •32.768 kHz frequency output function : C-MOS output With Control Pin •The various functions include full calendar, alarm, timer. Actual size RX-8801JE RX-8801SA 2 * The I C-Bus is a trademark of NXP Semiconductors Block diagram Overview • High Stability •UA ± 1.9 x 10-6 / 0 ºC to +40 ºC ( Equivalent to 5 seconds of month deviation ) -6 ± 3.4 x 10 / -40 ºC to +85 ºC ( Equivalent to 9 seconds of month deviation ) •UB ± 3.8 x 10-6 / 0 ºC to +50 ºC ( Equivalent to 10 seconds of month deviation ) ± 5.0 x 10-6 / -40 ºC to +85 ºC ( Equivalent to 13 seconds of month deviation ) 32.768 kHz 32kHz DTCXO CLOCK and CALENDAR DIVIDER FOUT FOE FOUT CONTROLLER TIMER REGISTER / INT INTERRUPT CONTROLLER ALARM REGISTER • 32.768 kHz frequency output function • FOUT pin output (C-MOS output), CL=30 pF • Output selectable < 32.768 kHz, 1024 Hz, 1 Hz > • The various interrupt • Timer Function can be set up between 1/ 4096 second and 255 minutes. • Alarm Function can be set to day of week, day, hour, or minute. CONTROL REGISTER SCL INTERFACE CIRCUIT SDA and SYSTEM CONTROLLER *It is possible to use it by the terminal connection as 32.768 kHz-DTCXO. Pin Function input FOUT Output TEST input VDD FOE / INT GND input Output - T2(VPP) - SDA I/O 1. T1(CE) 2. SCL 3. FOUT 4. N.C. 14. N.C. TEST 6. VDD 7. 7.4 ± 0.2 FOE 13. SDA 3. T2(V PP) T2(VPP) 4. SDA 5. 11. GND 6. 10. / INT 7. SCL 9. N.C. 8. FOUT 9. N.C. 10. FOE 8. N.C. ∗1 ) ∗3 ) 18. N.C. 17. N.C. N.C. 16. N.C. T1(CE) 15. N.C. 14. N.C. 5.4 1.5 Max. 6.0 ± 0.2 13. N.C. 12. N.C. 11. V DD 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. Typ. 3.0 Max. 5.5 Unit V VTEM Temp. compensated voltage 2.2 3.0 5.5 V VCLK TOPR - 1.6 −40 3.0 +25 ±1.9 ∗1 5.5 +85 V ºC IBK2 Ta = 0 ºC to +50 ºC ±3.4 ∗2 ±3.8 ∗3 Ta = -40 ºC to +85 ºC ±5.0 ∗4 Ta = -40 ºC to +85 ºC Δf/f IBK1 Ta = 0 ºC to +40 ºC Backup Mode VDD = 5V FOE = GND, /INT = VDD VDD = 3V FOUT output : OFF Equivalent to 5 seconds of month deviation. Equivalent to 10 seconds of month deviation. ∗2 ) ∗4 ) × 10 −6 - 1.2 3.4 - 0.8 2.1 Equivalent to 9 seconds of month deviation. Frequency temperature characteristics 10 5 32.768 kHz DTCXO -6 Min. 1.6 Frequency tolerance ( ×10 ) Condition Interface voltage UB Current consumption (2) N.C. N.C. 32.768 kHz-DTCXO Frequency temperature characteristics (Example) Symbol VDD UA Current consumption (1) 20. 19. VSOJ − 20 pin Specifications (characteristics) Stability GND SOP − 14 pin Electrical Characteristics Item Interface voltage Temp. compensated Voltage Clock voltage Operating temperature 2. 12. 5.0 5. / INT 7.0 ± 0. 3 SCL * Use by the manufacture for testing. ( Do not connect externally.) Serial clock input pin The pin outputs the reference clock signal. ( CMOS output ) * Use by the manufacture for testing. ( Do not connect externally.) Connected to a positive power supply The input pin for the FOUT output control. Interrupt output ( N-ch open drain ) Connected to a ground * Use by the manufacture for testing. ( Do not connect externally.) Data input and output pin 1. 0.65 input RX−8801JE 10.1 ± 0.2 T1(CE) (Unit:mm) RX − 8801 SA Function 3.2 ± 0.1 I/O 1.27 Signal Name Terminal connection / External dimensions μA 0 -5 -10 -15 Tuning fork X'tal -20 -25 -30 Equivalent to 13 seconds of month deviation. http://www.epsontoyocom.co.jp -45 -35 -25 -15 -5 5 15 25 Temperature (ºC) 35 45 55 65 75 85