Real time clock module Epson Toyocom Toyocom Product Number (Please contact us) RX-4801SA : X1B000021xxxx00 RX-4801JE : X1B000041xxxx00 Built-in 32.768 kHz-DTCXO, High Stability SERIAL-INTERFACE REAL TIME CLOCK MODULE RX - 4801 SA / JE *Built in frequency adjusted 32.768 kHz crystal unit and DTCXO. *Interface Type : 4-wire serial interface *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-4801SA Block diagram RX-4801JE Overview * High Stability *UA -6 / 1.9 x 10 ( Equivalent to -6 3.4 x 10 / ( Equivalent to *UB -6 3.8 x 10 / ( Equivalent to -6 5.0 x 10 / ( Equivalent to 32.768 kHz 32kHz DTCXO CLOCK and CALENDAR DIVIDER FOUT FOE FOUT CONTROLLER TIMER REGISTER / INT INTERRUPT CONTROLLER ALARM REGISTER DI INTERFACE CIRCUIT CLK * 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. and SYSTEM CONTROLLER CE *It is possible to use it by the terminal connection as 32.768 kHz-DTCXO. Pin Function Terminal connection / External dimensions Output input input input FOUT Output FOE VDD input - 2. CLK 3. FOUT 4. N.C. 5. TEST 6. VDD 7. FOE RX-4801JE Current consumption (2) 1 ) DO 7.4 0.2 / IN T 2. GND 3. T2(Vpp) 4. DO 5. DI 6. CE 12. T2(VPP) 11. GND 10. / INT 7. CLK 9. N.C. 8. FOUT 9. N.C. 8. N.C. 10. 20. 5.4 1.5 Max. 6.0 0.2 FOE SOP - 14 pin N.C. 19. N.C. 18. N.C. 17. N.C. 16. N.C. 15. N.C. 14. N.C. 13. N.C. 12. N.C. 11. VDD VSOJ - 20 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. Condition Interface voltage Min. 1.6 Typ. 3.0 Max. 5.5 Unit V V TEM Temp. compensated voltage 2.2 3.0 5.5 V V CLK TOPR - 1.6 -40 3.0 +25 1 1.9 2 3.4 3 3.8 4 5.0 5.5 +85 V C - 1.2 3.4 - 0.8 2.1 Ta = 0 C to +50 C IBK2 Ta = -40 C to +85 C Backup Mode V DD = 5V FOE = GND, /INT = V DD V DD = 3V FOUT output : OFF Equivalent to 5 seconds of month deviation. Equivalent to 10 seconds of month deviation. 2 ) 4 ) x 10 Frequency temperature characteristics 10 5 -6 A Frequency tolerance ( x10-6 ) f/f IBK1 Ta = 0 C to +40 C Ta = -40 C to +85 C UB Current consumption (1) 13. 1. 32.768 kHz-DTCXO Frequency temperature characteristics (Example) Symbol V DD UA Stability DI 5.0 Electrical Characteristics Item Interface voltage Temp. compensated Voltage Clock voltage Operating temperature 14. 0.65 CE 7.0 0. 3 - DO DI CE CLK 1. 10.1 0.2 The open drain output for interrupt. Connected to a ground * Use by the manufacture for testing. ( Do not connect externally.) The data output pin for serial data transfer. The data input pin for serial data transfer. The chip enable input pin. The shift clock input pin for serial data transfer. The pin outputs the reference clock signal. ( CMOS output ) The input pin for the FOUT output control. Connected to a positive power supply 3.2 0.1 Function Output - 1.27 I/O / INT GND T2(VPP) (Unit:mm) RX - 4801 SA Signal Name Specifications (characteristics) 3 ) 0 C to +50 C 10 seconds of month deviation ) -40 C to +85 C 13 seconds of month deviation ) * 32.768 kHz frequency output function * FOUT pin output (C-MOS output), CL=30 pF * Output selectable < 32.768 kHz, 1024 Hz, 1 Hz > CONTROL REGISTER DO 0 C to +40 C 5 seconds of month deviation ) -40 C to +85 C 9 seconds of month deviation ) Equivalent to 9 seconds of month deviation. Equivalent to 13 seconds of month deviation. http://www.epsontoyocom.co.jp 32.768 kHz DTCXO 0 -5 -10 -15 Tuning fork X'tal -20 -25 -30 -45 -35 -25 -15 -5 5 15 25 Temperature (C) 35 45 55 65 75 85