Real time clock module
Product Number (Please contact us)
RX-4045SA : Q41404552xxxx00
RX-4045NB : Q41404592xxxx00
REAL TIME CLOCK MODULE (SPI-Bus)
High-Stability Frequency
RX
-
4045SA
/
NB
Built-in
32.768 kHz crystal unit
:
Frequency adjusted for high accuracy.
(510
6
/T
a
=+25C)
Interface
Type
:
4-wire serial interface
Operating
voltage range
:
1.7Vto5.5V
Wide
Timekeeper voltage range
:
1.15Vto5.5V
Various
detection Functions
:
Oscillation stop detection function etc.
Low
backup current
:
0.48A/3V(Typ.)
32.768
kHz clock frequency output
:
N-ch open drain output
Function
of time and calendar, the various detection function,
and interrupt function etc.
Actual size
RX-4045SA
RX-4045NB
Block diagram
Overview
Features built-in 32.768kHz crystal unit
▪Frequency
adjusted forhigh accuracy
(510
6
/T
a
=+25C)
(Equivalent to 13 seconds of monthly deviation)
FOUT
32kHz
OUTPUT
CONTROL
COMPARATOR_W
ALARM_W REGISTER
(MIN,HOUR, WEEK)
ALARM_D REGISTER
(MIN,HOUR)
VOLTAGE
DETECT
V
DD
COMPARATOR_D
The various detection Function
GND
OSC
DIVIDER
CORREC
-TION
DIV
TIME COUNTER
(SEC,MIN,HOUR,WEEK,DAY,MONTH,YEAR)
▪Power
supply voltage monitoring function
(with
selectable detection threshold)
▪Stop
detection function
▪Power-on
reset detection function
OSC
DETECT
ADDRESS
DECODER
ADDRESS
REGISTER
CLK
I/O
CONTROL
DI
DO
Equipped
with alarm and timer
▪
Timer function produces a periodic interruption signal.
As for the Alarm function an optional combination is
produced. (Date of the week , time , minute)
/INT
INTERRUPT CONTROL
SHIFT REGISTER
CE
Pin function
Signal
Name
CE
CLK
DI
DO
FOUT
/ INT
TEST
V
DD
GND
Input /
Output
Input
Input
Input
Output
Output
Output
-
-
-
Function
The chip enabled input pin.
( built -in pull-down resistance )
At the "H"level, access becomes possible.
The shift clock input pin for serial data transfer.
The data input pin for serial data transfer.
The data output pin for serial data transfer.
32.768kHzclock output pin with the output control
function (N-ch open drain)
High impedance at the time of output off.
Interrupt output
(N-ch open drain)
Used
by the manufacturer for testing.
(Do not connect externally.)
Connected to a positive power supply.
Connected to a ground.
Terminal connection/External dimensions
RX4045SA
1.27
(Unit:mm)
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
RX4045NB
2.
10.1
0.2
V
DD
(GND)
TEST
FOUT
CLK
DO
DI
GND
/INT
N.C.
0.5
1.
2.
3.
4.
5.
6.
7.
N.C.
CLK
FOUT
N.C.
14.
13.
12.
11.
5.0
N.C.
DO
DI
GND
/INT
N.C.
N.C.
1.
3.
4.
5.
6.
7.
8.
9.
10.
11.
CE
6.3
Max.
4.8
1.3
0.1
5.0
0.2
22.
21.
20.
19.
18.
17.
16.
15.
14.
13.
12.
TEST
V
DD
CE
7.4
0.2
3.2
0.1
10.
9.
8.
SOP14 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.
1.7
1.15
-40
Typ.
3.0
3.0
+25
Max.
5.5
5.5
+85
Unit
V
V
C
Refer to application manual for details.
Current consumption characteristics
Item
Symbol
T
a
=-40Cto+85C
Conditions
CE=GND
V
DD
=5V
V
DD
=3V
V
DD
=3V
Min.
-
-
Typ.
0.60
0.48
Max.
1.80
Unit
I
BK
Current
Consumption
FOUT;
output OFF
(Hi-z)
µA
1.20
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Frequency / voltage
characteristics
CE=GND
Conditions
Rating
AA: 55
AC: 05
2)
1Max.
1Max.
1)
Symbol
f/f
Unit
10
6
s
10
6
I
32k
FOUT;
32.768kHz
output ON
-
0.65
2.00
µA
t
STA
f/V
T
a
=+25°C
V
DD
=3.0V
T
a
=+25°C
V
DD
=2.0V
T
a
=+25°C
V
DD
=2.0Vto5.5V
Power supply detection voltage
Item
High-voltage mode
Low-voltage mode
Symbol
V
DETH
V
DETL
Conditions
V
DD
pin
V
DD
pin
Min.
1.90
1.15
T
a
=-30Cto+70C
Typ.
2.10
1.30
Max.
2.30
1.45
Unit
V
V
1)2)
Equivalent to 13 seconds of monthly deviation (excluding offset.)
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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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