Real time clock module
Product Number (Please contact us)
RX-4045SA AA : Q41404552000100
RX-4045SA AC : Q41404551000200
RX-4045NB AA: Q41404592000100
RX-4045NB AC: Q41404592000200
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.
2.
3.
4.
5.
6.
7.
N.C.
CLK
FOUT
N.C.
5.0
(Unit:mm)
RX4045NB
0.5
1.27
14.
10.1
0.2
N.C.
DO
DI
GND
/INT
N.C.
N.C.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
CE
V
DD
(GND)
TEST
FOUT
CLK
DO
DI
GND
/INT
N.C.
SON22
pin
5.0
0.2
4.8
1.3
0.1
22.
21.
6.3
Max.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
13.
12.
11.
10.
20.
19.
18.
17.
16.
15.
14.
13.
12.
TEST
V
DD
CE
7.4
0.2
3.2
0.1
9.
8.
SOP14 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:
AC: 05
2)
1Max.
1Max.
55
1)
Unit
10
6
s
10
6
Symbol
f/f
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.)
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.
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.
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
►Designed
for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ).
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
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.
Seiko Epson Corporation
Mouser Electronics
Authorized Distributor
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