Actual size
Real time clock module
Block diagram
BUS
INTERFACE
CIRCUIT
CE 1
CLK
DATA
32.768 kHz
CE 0
CONTROL
REGISTER
SHIFT REGISTER
ALARM
REGISTER
TIMER
REGISTER
CLOCK and
CALENDAR
INTERRUPTS
CONTROLLER
OUTPUT
CONTROLLER
DIVIDER
CONTROL LINE
FOUT
/ TIRQ
/ AIRQ
OSC
FCON
•32.768 kHz frequency output function
• FOUT pin output (C-MOS output ), CL=30 pF
• Output frequency selectable from1/30Hz to 32.768kHz
(32 Values)
•Timer function
• Timer function 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.
•Alarm function
• 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).
Functions are compatible with RX-4574LC.
Terminal connection/External dimensions
(Unit:mm)
RTC4574SA
1.
GND
14.
FCON
2.
FOUT
13.
CE1
3.
N.C.
12.
DATA
4.
N.C.
11.
CLK
5.
N.C.
10.
/TIRQ
6.
N.C.
9.
/AIRQ
7.
VDD
10.1 0.2
5.0
7.40.2
3.20.1
1.27
8.
CE0
SOP14 pin
RTC4574JE
1.
VDD
20.
N.C.
2.
FOUT
19.
N.C.
3.
CE0
18.
N.C.
4.
/AIRQ
17.
N.C.
5.
/TIRQ
16.
N.C.
6.
CLK
15.
N.C.
7.
DATA
14.
N.C.
8.
CE1
13.
N.C.
9.
FCON
12.
N.C.
10.
GND
7.00.3
5.4
6.00.2
1.5Max.
0.65
11.
N.C.
VSOJ20 pin
RTC4574NB
1.
GND
22.
N.C.
2.
FCON
21.
N.C.
3.
N.C.
20.
N.C.
4.
CE1
19.
N.C.
5.
DATA
18.
N.C.
6.
CLK
17.
N.C.
7.
/TIRQ
16.
N.C.
8.
/AIRQ
15.
N.C.
9.
CE0
14.
N.C.
10.
FOUT
13.

11.
VDD
4.8
6.3Max.
5.00.2
0.5
1.30.1
12.

SON22 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.
Specifications (characteristics)
Refer to application manual for details.
Recommended Operating Conditions
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Power voltage
VDD
-
1.6
3.0
5.5
V
Clock voltage
VCLK
-
1.6
3.0
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=3.0V
B: 523
106
Oscillation
start-up time
tSTA
Ta=+25°C
VDD=1.6V
3Max.
s
 Please ask for tighter tolerance.(Equivalent to ±1 minute of monthly deviation)
Current consumption characteristics
Ta=-40Cto+85C
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Current
Consumption
IBK
CE0,CE1=GND
FOUT;output OFF
(Hi-z)
VDD
=5V
-
1.0
2.0
µA
VDD
=3V
-
0.5
1.0
I32k
CE0=GND
CE1=VDD
FOUT;
32.768kHzoutput ON
CL=30pF
VDD
=5V
-
8.0
20.0
µA
VDD
=3V
-
5.0
12.0
REAL TIME CLOCK MODULE (SPI-Bus)
RTC - 4574SA/JE/NB
•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 : 1.6Vto5.5V
•Low backup current : 0.5A/3V(Typ.)
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
RTC-4574JE
RTC-4574NB
RTC-4574SA
Product Number (Please contact us)
RTC-4574SA : Q41457452000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q4145749x000100
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.)
►Designed for automotive applications such as Car Multimedia, Body Electronics, Remote Keyless Entry etc.
►Designed for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ).
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 data, circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson
does not assume any liability for the occurrence of customer damage or infringing on any patent or copyright of a third party. This
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• These products are intended for general use in electronic equipment. When using them in specific applications that require extremely
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/ Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains,
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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.