Actual size
Real time clock module
Block diagram
Overview
OSC
FOUT
I / O
CONTROLLER
SHIFT REGISTER
CLK
DATA
CE
WR
32.768 kHz
DIVIDER
OUTPUT
CONTROLLER
FOE
CONTROL
CIRCUIT
FSEL
VOLTAGE
DETECT
CLOCK AND CALENDAR
32.768 kHz frequency output function
•FOUT pin output (C-MOS output ), CL=30 pF
•FOE pin enables output on/off control.
•FSEL pin enables output selectable 32.768 kHz or 1 Hz.
Power supply voltage monitoring function
•Detection that power supply voltage descended to 1.7 V or less.
•Automatic record to FDT-bit at the time of power supply
decline detection.
Pin Function
Terminal connection
/
External dimensions
(
Unit:mm
)
Signal Name Input / Output Function
CE Input The chip enabled input pin.
At the HIGHlevel, acc ess becomes possible.
CLK Input The shift clock input pin for serial data transfer.
WR Input DATA pin input / output switching pin.
DATA Bi-directional The data input / output pin for serial data transfer.
FOUT Output 32.768kHzor 1Hz clock output pin
(C-MOS output).
High impedance at output off.
FOE Input The input pin for the FOUT output control.
FSEL Input Select the frequency that is output from the
FOUT pin.
VDD
-
Connected to a positive power supply.
GND
-
Conn ected t o a grou nd.
RTC4543SA
1. GND 14. FOUT
2. N.C. 13. N.C.
3. CE 12. N.C.
4. FSEL 11. DATA
5. WR 10. CLK
6. FOE 9. VDD
7. N.C.
10.1 0.2
5.0
7.40.2
3.20.1
1.27
8. N.C.
SOP14 pin
RTC4543SB
1. N.C. 18. N.C.
2. N.C. 17. N.C.
3. N.C. 16. N.C.
4. N.C. 15. N.C.
5. FOE 14. VDD
6. WR 13. N.C.
7. FSEL 12. CLK
8. CE 11. DATA
9. GND
5.4
11.40.2
7.80.2
1.27
2.0Max
.
10. FOUT
SOP18 pin
The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
S
p
ecifications
(
characteristics
)
*Refer to a
pp
lication Manual for details.
Recommended Operating Conditions
Item Symbol Conditions Min. Typ. Max. Unit
Power voltage VDD
-
2.5 5.0 5.5 V
Clock voltage VCLK
-
1.4 5.0 5.5 V
Operating
temperature TOPR
-
-40 +25 +85 °C
Frequency characteristics
Item Symbol Conditions Rating Unit
Frequency
tolerance f/f Ta=+25°C
VDD=5.0V 523 106
Oscillation
start-up time tSTA Ta=+25°C
VDD=2.5V 3Max. s
Please ask for tigh t er tol erance. (E qu i val en t to 1 min ut e of m ont hl y d evi ati on )
Current consumption characteristics Ta=-40Cto+85C
Item Symbol Conditions Min. Typ. Max. Unit
Current
Consumption IBK
CE=GND
FOE=GND
FOUT;output OFF
(Hi-z)
VDD
=5V 1.5 3.0
µA
VDD
=3V 1.0 2.0
VDD
=2V 0.5 1.0
Supply Voltage Detection Characteristic Ta=-40Cto+85C
Item Symbol Conditions Min. Typ. Max. Unit
Power supp ly
detection voltage VDT VDD pin 1.4 1.7 2.0 V
RTC-4543SA RTC-4543SB
Simple Function
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RTC - 4543SA/SB
Built in frequency adjusted 32.768 kHz crystal unit.
Interface type : 3-wire serial interface
Operating voltage range : 2.5Vto5.5V
Wide T imekeepe r volt age range : 1.4Vto5.5V
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, timer, and low voltage detection.
Product Number (Please contact us)
RTC-4543SA : Q41454352000200
RTC-4543SB : Q41454361000200
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.
WORKING FOR HIGH QUALITY
In order provide high quality and reliable products and services
than meet customer needs,
Seiko Epson made early efforts towards obtaining ISO9000 series
certification and has acquired ISO9001 for all business
establishments in Japan and abroad. We have also acquired ISO/TS
16949 certification that is requested strongly by major automotive
manufacturers as standard.
►Explanation of the mark that are using it for the catalog
►Pb free.
►Complies with EU RoHS directive.
*About the products without the Pb-free mark.
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.
Seiko Epson Corporation
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.
• You are requested not to use the products (and any technical information furnished, if any) for the development and/or manufacture of
weapon of mass destruction or for other military purposes. You are also requested that you would not make the products available to
any third party who may use the products for such prohibited purposes.
• These products are intended for general use in electronic equipment. When using them in specific applications that require extremely
high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance.
/ Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains,
vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment
and security equipment / traffic control equipment / and others requiring equivalent reliability.
• All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective.
ISO 14000 is an international standard for environmental
management that was established by the International
Standards Organization in 1996 against the background of
growing concern regarding global warming, destruction of
the ozone layer, and global deforestation.
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
