Real time clock module Product Number (Please contact us) RX-4574LC : Q414574C2000300 Small size, low profile model package SERIAL-INTERFACE REAL TIME CLOCK MODULE RX - 4574LC Built in frequency adjusted 32.768 kHz crystal unit. Interface Type : 3-wire serial interface Operating voltage range : 1.6Vto5.5V Wide Timekeeper voltage range : 1.3Vto5.5V Low backup current : 0.35A/3V(Typ.) 32.768 kHz frequency output function : C-MOS output With Control Pin The various functions include full calendar, alarm, timer. Actual size Block diagram Overview 32.768 kHz OSC CONTROL LINE 32.768 kHz frequency output function * FOUT pin output (C-MOS output), CL=30 pF * Output frequency is selectable from 1/30Hzto 32.768kHz (32 Values) CLOCK and DIVIDER CALENDAR Timer function FOUT FCON OUTPUT / TIRQ INTERRUPTS CONTROLLER REGISTER ALARM CONTROLLER / AIRQ * Timer function which can be set up between 1/4096 second and 255 minutes. * It is recorded automatically to TF-bit at the time of event occurrence, and it's possible to output with /TIRQ pin output (open-drain output). * Selectable one time mode or repeat mode. TIMER REGISTER Alarm function DATA * Alarm function can be set to any combination of day of week, hour, or minute. *It is recorded automatically to AF-bit at the time of event occurrence, and it's possible to output with /AIRQ pin output (open-drain output). CONTROL BUS REGISTER CLK INTERFACE CE 1 CIRCUIT CE 0 SHIFT REGISTER Functions are compatible with RTC-4574SA/JE/NB. Pin Function Terminal connection/External dimensions (Unit:mm) RX4574LC CE1 Input The chip enabled input pin 0. (Built-in pull-down resistance) When both CE0 and CE1 pins are at the "H" level , access to this Real time clock module becomes possible. The chip enabled input pin 1. When the CE1 pin is at the HIGH level, the FOUT pin is in the output state. The shift clock input pin for serial data transfer. 1. N.C. The data input / output pin for serial data transfer. This pin outputs the reference clock signal at 32.768 kHz ( C-MOS output ). High impedance at the time of output off. The input pin for the FOUT output control. 4. / AIRQ CLK Input DATA Bi-directional FOUT Output FCON Input / AIRQ Output / TIRQ Output VDD - Connected to a positive power supply. GND - Connected to a ground. 2. N.C. 3. / TIRQ 5. FCON 6. FOUT Conditions Min. Typ. Max. Unit VDD VCLK - 1.6 1.3 3.0 3.0 5.5 5.5 V V TOPR - -40 +25 +85 C Oscillation Start-up time f/f tSTA 7. GND Refer to application manual for details. Current consumption characteristics Item Symbol Conditions Ta=+25C VDD=3.0V Ta=+25C VDD=1.6V Ta=-40Cto+85C VDD=1.6V *Equivalent to 1 minute of monthly deviation Rating Unit 523* 106 1Max. s 3Max. s Current Consumption FOUT;output OFF (Hi-z) CE0=GND CE1=VDD I32k Ta=40Cto+85C Conditions CE0,CE1=GND Frequency characteristics Frequency tolerance 2.8 8. CE0 *Stop using the glue Any glue must never use it after soldering LC-package to a circuit board.This product has glass on the back side of a package.When glue invasions between circuit board side and glass side, then glass cracks by thermal expansion of glue.In this case a crystal oscillation stops.Consider glue abolition or glue do not touch to LC-package Symbol Symbol 9. DATA VSOJ12pin The open drain output pin for timer interrupt. IBK Item 2.4 Specifications (characteristics) Item 11. CE1 10. CLK The open drain output pin for alarm and time update interrupts. Recommended Operating Conditions Power voltage Clock voltage Operating temperature 12. VDD 3.6 Input 1.2Max. CE0 Function 0.5 Signal Name Input / Output FOUT; 32.768kHz output ON CL=30pF Min. VDD =5V VDD =3V VDD =5V VDD =3V Typ. Max. 0.45 0.9 Unit A 0.35 0.7 8.0 20.0 5.0 12.0 A PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Seiko Epson, all environmental initiatives operate under the Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous improvements. The environmental management system (EMS) operates under the ISO 14001 environmental management standard. All of our major manufacturing and non-manufacturing sites, in Japan and overseas, completed the acquisition of ISO 14001 certification. 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Contains Pb in products exempted by EU RoHS directive. (Contains Pb in sealing glass, high melting temperature type solder or other.) The products have been designed for high reliability applications such as Automotive. Notice * * * * * * This material is subject to change without notice. Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson. The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of infringing on any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual copyrights. When exporting the products or technology described in this material, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. 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