Real time clock module
Simple Function
SERIAL-INTER FACE REA L TIME C LOCK MODULE
RTC - 4543 SA
/
SB
•Built
in frequency adjusted 32.768 kHz crystal unit.
•Interface
type
:
Serial-interface
•Operating
voltage range
:
2.5 V to 5.5 V
•Wide
Timekeeper voltage range
:
1.4 V to 5.5 V
•32.768
kHz frequency output function
:
C-MOS output With Control Pin
•The
various functions include full calendar, timer, and low voltage detection.
•Lead(Pb)-free
: Contains high melting temperature type solder (Pb85 %)
exempted by RoHS directive.
Actual size
RTC-4543SA
RTC-4543SB
Block diagram
32.768 kHz
Overview
•
32.768 kHz frequency output function
CLOCK AND
CALENDAR
OSC
DIVIDER
•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 1Hz.
•
Power supply voltage monitoring function
FOUT
FSEL
FOE
VOLTAGE
DATA
CLK
WR
CE
I/O
CONTROLLER
DETECT
CONTROL
CIRCUIT
OUTPUT
CONTROLLER
SHIFT REGISTER
•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
Signal Name Input / Output
Terminal connection / External dimensions
Function
The chip enabled input pin.
At the HIGH level, access becomes possible.
The shift clock input pin f or serial dat a transfer.
DATA pin input / output switching pin.
(Unit:mm)
RTC
−
4543 SA
1.
2.
3.
4.
5.
6.
7.
GND
N.C.
CE
FSEL
WR
3.2
±
0.1
5.0
1.27
RTC
−
4543 SB
2.
3.
12.
11.
10.
9.
8.
N.C.
DATA
CLK
V
DD
N.C.
4.
5.
6.
7.
8.
9.
N.C.
N.C.
N.C.
FOE
WR
FSEL
CE
GND
7.8
±
0.2
5.4
2.0
Ma x.
1.27
CE
CLK
WR
DATA
FOUT
FOE
FSEL
V
DD
GND
Input
Input
Input
14.
10.1
±
0.2
FOUT
N.C.
1.
N.C.
18.
17.
11.4
±
0.2
N.C.
N.C.
N.C.
N.C.
V
DD
N.C.
CLK
DATA
FOUT
13.
16.
15.
14.
13.
12.
11.
10.
Bi-directional The data input / output pin for serial data transfer.
Output
Input
Input
-
-
32.768 kHz or 1Hz clock output pin
(C-MOS output).
High impedance at output off.
The input pin f or the FOUT output control.
Select t he frequency that is output from the
FOUT pin.
Connected to a positive power supply.
Connected to a ground.
FOE
N.C.
7.4
±
0 .2
SOP
−
14 pin
SOP
−
18 pin
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.
Specifications (characteristics)
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
*
Refer to application Manual for details.
DC characteristics
Typ.
5.0
5.0
+25
Max.
5.5
5.5
+85
Unit
V
V
°C
Current
Consumption
T
a
= -40
°C
to +85
°C
Symbol
V
DD
V
CLK
T
OPR
Condition
-
-
-
Min.
2.5
1.4
-40
Item
Symbol
Condition
V
DD
=5V
V
DD
=3V
V
DD
=2V
Min.
Typ.
1.5
1.0
0.5
Max.
3.0
2.0
1.0
Unit
I
BK
CE = GND
FOE = GND
FOUT ;output OFF
(Hi-z)
µA
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Symbol
∆
f/f
Condition
T
a
= +25 °C
V
DD
= 5.0 V
T
a
= +25 °C
V
DD
= 2.5 V
Rating
5
±
23
∗
3 Max.
Unit
×
10
−
6
s
Supply Voltage Detection Characteristic
Item
Power supply
detection voltage
T
a
= -40
°C
to +85
°C
t
STA
Symbol
V
DT
Condition
V
DD
pin
Min.
1.4
Typ.
1.7
Max.
2.0
Unit
V
∗
Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation )
http://www.epsontoyocom.co.jp
115
End to End EPSON TOYOCOM
The development of our ubiquitous network society has caused
a diversification of applications and has increased the demand for
high-level quartz devices in terms of quality, quantity, and
function.
The Quartz Device Operations Division of SEIKO EPSON
CORPORATION (EPSON)and TOYO COMMUNICATION
EQUIPMENT CO.,LTD.(TOYOCOM) were integrated on October
1,2005 to establish a new company, EPSON TOYOCOM
CORPORATION, to meet these market and customer demands.
Each company contributes its own strength; EPSON holds a
strong presence in consumer products and TOYOCOM is strong
in industrial products. The consolidation of these two companies
in a new company that provides advanced expertise with a wide
range of products for terminals and infrastructure to our
customers.
Quartz device have become crucial in the network environment
where products are increasingly intended for broadband,
ubiquitous applications and where various types of terminals can
transfer information almost immediately via LAN and WAN on a
global scale. EPSON TOYOCOM CORPORATION addresses
every single aspect within a network environment. The new
corporation offers “end-to-end” solutions to problems arising with
products for consumer use, such as core network systems and
automotive systems.
PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM
CONFORMING INTERNATIONAL STANDARD
At EPSON TOYOCOM, 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.
In May 2001, all of our major manufacturing and non-manufacturing sites, in Japan and overseas, completed the acquisition of ISO 14001 certification.
In the future, new group companies will be expected to acquire the certification around the third year of operations.
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.
WORKING FOR HIGH QUALITY
EPSON TOYOCOM quickly began working to aquire company-wide ISO 9000 series certification, and has acquired ISO 9001 or ISO 9002 certification
with all targeted products manufactured in Japanese and overseas plants.
The Quartz Device Operations Division (Ina Japan,EPM and SZE) have acquired QS-9000 certification, which are of higher Level.
Also QS-9000 and TS 16949 certification, which is of higher level, has been acquired.
QS-9000 is an enhanced standard for quality
assurance systems formulated by leading
U.S.automobile manufacturers based on
the international ISO 9000 series.
ISO/TS 16949 is a global standard based on
QS-9000, a severe standard corresponding to
the requirements from automobile industry.
Notice
●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 EPSON TOYOCOM.
●The
information, applied circuit, program, usage etc., written in this material is just for reference. EPSON TOYOCOM does not assume any liability for
the occurrence of infringing any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual
copyrights.
●Any
product described in this material may contain technology or the subject relating to strategic products under the control of the Foreign
Exchange and Foreign Trade Law of Japan and may require an export licence from the Ministry of International Trade and industry or other
approval from another government agency.
●These
products are intended for general use in electronic equipment. When using them in specific applications that require extremely high reliability
such as applications stated below, it is required to obtain the permission from EPSON TOYOCOM 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.
●
In this new crystal master for EPSON TOYOCOM, product code and marking will still remain as previously identified prior to the merger.
Due to the on going strategy of gradual unification of part numbers, please review product code and marking as they will change during the course of
the coming months.
We apologize for the inconvenience, but we will eventually have a unified part numbering system for Epson Toyocom which will be user friendly.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
