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Epson RTC-4543SA Applications Manual

Real time clock module
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Table of Contents
MQ252-03
Application Manua
Real Time Clock Module
RTC-4543SA/SB
Model
RTC-4543SA
RTC-4543SB
Product Number
Q4145435x000200
Q4145436x000200
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  Summary of Contents for Epson RTC-4543SA

  • Page 1 MQ252-03 Application Manua Real Time Clock Module RTC-4543SA/SB Model RTC-4543SA RTC-4543SB Product Number Q4145435x000200 Q4145436x000200...
  • Page 2 • The information, applied circuit, program, using way etc., written in this material is just for reference. Seiko Epson does not assume any liability for the occurrence of infringing any patent or copyright of third party. This material does not authorize the licence for any patent or intellectual property rights.

  • Page 3: Table Of Contents

    RTC - 4543 SA/SB 1. OVERVIEW ...1 2. BLOCK DIAGRAM 3. PIN CONNECTIONS 4. PIN FUNCTIONS 5. ELECTRICAL CHARACTERISTICS 5-1. A BSOLUTE AXIMUM 5-2. O PERATING 5-3. F REQUENCY 5-4. DC C HARACTERISTICS ...3 5-5. AC C HARACTERISTICS...4 5-6. T IMING HARTS ...5 6.

  • Page 4: Overview

    In addition, this module has a 32.768 kHz/1 Hz selectable output function for hardware control that is independent of the RTC circuit. This module is available in a compact SOP 14-pin package (RTC-4543SA) and a thin SOP 18-pin package (RTC-4543SB).

  • Page 5: Pin Connections

    FOUT pin. When low, the FOUT pin goes to high impedance. Connects to positive (+) side of the power supply. Serial clock input pin. Input Data is gotten at the rising edge during a write, and data is output at the rising edge during a read.

  • Page 6: Electrical Characteristics

    RTC - 4543 SA/SB 5. Electrical Characteristics 5-1. Absolute Maximum Ratings Item Symbol Supply voltage Input voltage Output voltage Storage temperature 5-2. Operating Condition Item Symbol Operating supply voltage Data holding voltage Operating temperature 5-3. Frequency Characteristics Item Symbol Frequency tolerance Frequency temperature characteristics Frequency voltage...

  • Page 7: Ac Characteristics

    Write data hold time WR setup time WR hold time DATA output delay time DATA output floating time Clock input rise time Clock input fall time FOUT rise time (CL=30 pF) FOUT fall time (CL=30 pF) Disable time (CL=30 pF)

  • Page 8: Timing Charts

    RTC - 4543 SA/SB 5-6. Timing Charts ( 1 ) Data read CLKH CLKS DATA ( 2 ) Data write CLKH CLKS DATA ( 3 ) FOUT output FOUT ( 4 ) Disable/enable FOUT CLKL DATD CLKL Duty Disable High impedance Page - 5 100 % Enable...

  • Page 9: Timer Data Organization

    The supply voltage detection circuit monitors the supply voltage once every 0.5 seconds; if the supply voltage is lower than the detection voltage value, the FDT bit is set to “1”. TM bit: This is a test bit for SEIKO-EPSON’s use. Always set this bit to “0”. mi40...

  • Page 10: Description Of Operation

    4) If data is required in less than 52 clock pulses, that part of the data can be gotten by setting the CE pin low after the necessary number of clock pulses have been output.

  • Page 11: Data Writes (Divider Reset)

    1 Hz level) after the CE pin goes high during the time between the falling edge of the first clock cycle and the rising edge of the second clock cycle, the length of the first 1 Hz cycle after the data write operation is 1.0 s...

  • Page 12: Examples Of External Circuits

    RTC - 4543 SA/SB 8. Examples of External Circuits Example 1. When used as an RTC + clock source *1: FOUT output frequency setting (High: 1 Hz; low: 32.768 kHz) *2: Prohibits FOUT output during back up, reducing current consumption.

  • Page 13: External Dimensions

    RTC - 4543 SA/SB 9. External Dimensions RTC - 4543 SA ( SOP-14pin ) 10.1 0.2 0.35 The cylinder of the crystal oscillator can be seen in this area ( front ), but it has no affect on the performance of the device. RTC - 4543 SB ( SOP-18pin ) 11.4...

  • Page 14: Reference Data

    ( C) : Highest temperature(+25 C 5 C) : Any given temperature ( C) 2. In order to determine the clock accuracy, add in the frequency tolerance and the voltage characteristics. f/f = f/f : Clock accuracy at any given temperature...

  • Page 15: Application Notes

    RTC - 4543 SA/SB 12. Application notes 12-1. Notes on handling This module uses a C-MOS IC to realize low power consumption. Carefully note the following cautions when handling. (1) Static electricity While this module has built-in circuitry designed to protect it against electrostatic discharge, the chip could still be damaged by a large discharge of static electricity.
  • Page 16 EPSON HONG KONG LTD. 20/F., Harbour Centre, 25 Harbour Road, Wanchai, Hong kong Phone: (852) 2585-4600 Fax: (852) 2827-2152 EPSON ELECTRONIC TECHNOLOGY DEVELOPMENT (SHENZHEN )CO., LTD. Flat 16A, 16/F, New Times Plaza, No.1 Taizi Road, Shenzhen, China Phone EPSON TAIWAN TECHNOLOGY & TRADING LTD.

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