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Epson RTC-4543SA manual

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Table of contents for the manual

  • Page 1

    M Q 252-0 3 Application Manua l Real Time Clock Module RTC-4543SA/SB Model Product Number R T C - 4543SA Q4145435 x 000200 R T C - 4543SB Q4145436 x 000200[...]

  • Page 2

    N O T I C E • The 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, applied circuit, program, using way etc., w ritten in this material is just for reference. Seiko Epson does not assume any li[...]

  • Page 3

    RTC - 4543 SA/SB CONTENTS 1. OVERVIEW ........................................................................................................ 1 2. BLOCK DIAGRAM ........................................................................................... 1 3. PIN CONNECTI O NS .........................................................................[...]

  • Page 4

    RTC - 4543 SA/SB Page - 1 MQ - 252 - 03 32-kHz Output Serial RTC Module RTC - 4543 SA/SB z Built-in cryst al permits operat ion w ithout requiring adjustment z Built-in time counters (seconds, minutes, hours) and calendar counters (day s, day s of the week months, years) z Operating v olt age range: 2. 5 V t o 5.5 V z Supply v olt age d[...]

  • Page 5

    RTC - 4543 SA/SB Page - 2 MQ - 252 - 03 3. Pin Connections 1 78 14 2 3 4 5 6 1 7 14 12 11 10 9 8 13 GND CLK WR FOUT DATA CE DD V FOE N.C FSEL N.C N.C N.C N.C RTC - 4543SA SOP - 14pin 1 91 0 18 2 3 4 5 6 1 7 9 8 GND WR CE DD V FOE N.C FSEL N.C N.C 17 16 15 14 13 18 12 10 11 N.C N.C N.C N.C N.C CLK DATA FOUT N.C RTC - 4543SB SOP - 18pin 4. Pin Functi[...]

  • Page 6

    RTC - 4543 SA/SB Page - 3 MQ - 252 - 03 5. Electrical Characteristics 5-1. Abso lute M ax imum R atings Item Sy m bol Conditions Min. Max. Unit Supply voltage V DD -0.3 7.0 V Input voltage V I T a=+25 ° C GND-0.3 V DD +0.3 V Output voltage V O GND-0.3 V DD +0.3 V Storage tem perature T STG - -55 +125 ° C 5-2. Oper at ing Condition Item Symbol Con[...]

  • Page 7

    RTC - 4543 SA/SB Page - 4 MQ - 252 - 03 5-5. AC Charact er ist ics Unless spec ified otherwise: Ta = - 40 to +85 ° C, CL = 50 pF Item Symbol V DD =5 V ± 10 % V DD =3 V ± 10 % Unit Min. Max . Min. Max. CLK cl ock cy cle t CLK 0.75 7800 1.5 7800 µ s CLK low pulse width t CLKL 0.375 3900 0.75 3900 µ s CLK high pulse width t CLKH 0.375 3900 0.75 3[...]

  • Page 8

    RTC - 4543 SA/SB Page - 5 MQ - 252 - 03 5-6. T iming Charts ( 1 ) Data read WR t WR S CE t t f1 r1 CLK t CES t CLK DATA t CLKH t CLKL t DAT D t WR H t CEH t DZ t RCV t CE t CLKS ( 2 ) D a t a w r i t e WR t WR S CE t t f1 r1 CLK t CES t CLK DATA t CLKH t CLK L t WR H t CEH t SD t HD t RCV t CE t CLKS ( 3 ) FOUT output FOUT t t r2 10% 90% 50% t f2 t[...]

  • Page 9

    RTC - 4543 SA/SB Page - 6 MQ - 252 - 03 6. Timer Data Organization • The counter data is BCD code. • The tim er automatic ally adjusts for different m onth lengths and for leap year. • The tim e is indicated in 24-hour f ormat. • W rites and r eads are both perform ed on an LSB-firs t basis. MSB LSB Second ( 0 to 59 ) FDT s40 s20 s10 s8 s4 [...]

  • Page 10

    RTC - 4543 SA/SB Page - 7 MQ - 252 - 03 7. Description of Operation 7-1.Data r eads CLK WR DATA FDT s40 s20 s10 s8 s4 s2 s1 y8 y1 0 y20 y4 0 CE y8 0 1 52 Se c 2 53 54 54+n Output data does not change Year 1) W hen the W R pin is low and the CE pin is high, the RTC enters data output mode. 2) At the f irst rising edge of the CLK signal, the c lock a[...]

  • Page 11

    RTC - 4543 SA/SB Page - 8 MQ - 252 - 03 7-3. Data writes ( Divider Reset ) CLK WR DATA s40 s20 s10 s8 s4 y8 y1 0 y20 y4 0 CE y8 0 1 52 2 N Seconds s1 Divider rese t Pul se s2 Tim er,counter N se co nd s N s e conds 0 seconds Ca rry sto p Pul se After the c ounter is reset, carr ies to the seconds digit are halted.Af ter the data write operation, th[...]

  • Page 12

    RTC - 4543 SA/SB Page - 9 MQ - 252 - 03 8. Examples of Ex ternal Circuits • Example 1. W hen used as an RTC + clock source RT C 4543 VDD CE GND 0.1 µ F FOUT FSEL WR DATA CLK FOE VDD VDD P o we r supply De te ct io n ci rcu i t Pow e r supply Switching c ircuit *1 *2 *1: FOUT output frequency setting (H igh: 1 Hz; low : 32.768 kHz) *2: Prohibits [...]

  • Page 13

    RTC - 4543 SA/SB Page - 10 MQ - 252 - 03 9. External Dimensions RTC - 4543 SA ( SOP-14pin ) 10.1 ± 0.2 5.0 7.4 ± 0.2 1.27 1.2 0.05 Min. 3.2 ± 0.1 0.35 0.6 0.15 0 - 10 ° ∗ The c ylinder of t he crystal oscillator c an be seen in this area ( front ), but it has no affect on the perform ance of the devic e. RTC - 4543 SB ( SOP-18pin ) 7.8 ± 0. [...]

  • Page 14

    RTC - 4543 SA/SB Page - 11 MQ - 252 - 03 11. Reference Data (1) Example of Frequency-Temperature Characteristics θ T = +25 ° C Typ. α = -0.035 × 10 -6 / ° C 2 Typ. T emperatur e [°C] -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 +10 -50 -40 -30 -20 -10 0 +10 +20 +30 +40 + 50 +60 +70 + 80 +90+100 F req uency fT ∆ × 10 [...]

  • Page 15

    RTC - 4543 SA/SB Page - 12 MQ - 252 - 03 12. Application notes 12-1. Notes on handling This module uses a C-M OS IC to realize low pow er consumption. Carefully note the follow ing cautions when handling. (1) Static electricity W hile this module has built-in circuitry designed to protect it against electrostatic discharge, the chip could still be [...]

  • Page 16

    Application Manual AME RIC A EPSON ELECTRONICS AMERICA, INC. HEA DQUA RTER 150 River Oaks Parkway, San Jose, CA 95134, U.S.A. Phone: (1)800-228-3964 (Toll free) : (1)408-922-0200 (Mai n) Fax: (1)408-922-0238 htt p:// www. eea.epson.com A tlanta Offi ce 3010 Roy al Bl vd. South, Ste. 170, A lpharetta, GA 30005, U.S.A. Phone: (1)877-332-0020 (Toll fr[...]