Real time clock module
Product Number (Please contact us)
RTC-4574SA : Q41457452000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q41457492000100
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
:
0.5A/3V(Typ.)
32.768
kHz frequency output function
:
C-MOS output With Control Pin
The
various functions include full calendar, alarm, timer.
Actual size
RTC-4574SA
RTC-4574JE
RTC-4574NB
Block diagram
32.768 kHz
CONTROL LINE
Overview
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)
OSC
DIVIDER
CLOCK and
CALENDAR
FOUT
FCON
/ TIRQ
/ AIRQ
DATA
CLK
CE 1
CE 0
Timer
function
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
ALARM
REGISTER
CONTROL
REGISTER
INTERFACE
CIRCUIT
SHIFT REGISTER
TIMER
REGISTER
• 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
BUS
• 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
RTC4574SA
1.27
(Unit:mm)
RTC4574NB
20.
19.
7.0
0.3
RTC4574JE
14.
10.1
0.2
2.
13.
12.
11.
CE1
DATA
CLK
/TIRQ
/AIRQ
CE0
3.
4.
5.
6.
10.
7.
8.
9.
10.
FOUT
CE0
/AIRQ
/TIRQ
CLK
DATA
CE1
FCON
GND
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
FCON
N.C.
CE1
DATA
CLK
/TIRQ
/AIRQ
CE0
FOUT
V
DD
0.5
1.
2.
3.
4.
5.
6.
7.
GND
FOUT
N.C.
N.C.
FCON
0.65
1.
V
DD
N.C.
1.
GND
6.3
Max.
22.
21.
20.
19.
18.
17.
4.8
1.3
0.1
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
18.
17.
16.
15.
5.0
N.C.
3.2
0.1
5.4
14.
1.5
Max.
13.
16.
15.
14.
13.
12.
N.C.
V
DD
7.4
0.2
9.
8.
12.
6.0
0.2
11.
5.0
0.2
SOP14
pin
VSOJ20
pin
SON22
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)
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Symbol
V
DD
V
CLK
T
OPR
Conditions
-
-
-
Min.
1.6
1.6
-40
Typ.
3.0
3.0
+25
Max.
5.5
5.5
+85
Unit
V
V
°C
I
BK
Item
Symbol
Refer
to application manual for details.
Current consumption characteristics
Conditions
V
DD
=5V
V
DD
=3V
V
DD
=5V
V
DD
=3V
Min.
-
T
a
=-40Cto+85C
Typ.
1.0
Max.
2.0
Unit
CE0,CE1=GND
FOUT;output OFF
(Hi-z)
µA
-
0.5
1.0
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Symbol
f/f
Conditions
T
a
=+25°C
V
DD
=3.0V
T
a
=+25°C
V
DD
=1.6V
Rating
B:
523
3Max.
Unit
10
6
s
Current
Consumption
CE0=GND
CE1=V
DD
I
32k
FOUT;
32.768kHzoutput ON
CL=30pF
-
8.0
20.0
µA
t
STA
-
5.0
12.0
Please ask for tighter tolerance.(Equivalent
to 1 minute of monthly deviation)
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CONFORMING TO INTERNATIONAL STANDARDS
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certification.
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
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 ).
ISO/TS16949 is the international standard that added the
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