Real time clock module
Product Number (Please contact us)
RX-4581NB : Q41458192000200
REAL TIME CLOCK MODULE (SPI-Bus)
Built-in SRAM
RX - 4581
NB
Built
in frequency adjusted 32.768 kHz crystal unit.
Interface
Type
:
4-wire serial interface
Operating
voltage range
:
1.6Vto5.5V
Wide
Timekeeper voltage range
:
1.6Vto5.5V
Low
backup current
:
0.4A/3V(Typ.)
Built-in
SRAM
:
Built-in 128bit(8bit16)RAM.
32.768
kHz frequency output function
:
C-MOS output With Control Pin
The
various functions include full calendar, alarm, timer.
Actual size
Block diagram
32.768 kHz
CLOCK
and
CALENDAR
Overview
Built-in
SRAM
• Include 128bit(8bit16)RAM.
DIVIDER
OSC
Interface
Type
• Serial interface in 4 lines form.
It
is possible to make it to 3 lines by wired-OR connecting
DI and DO pins.
FOUT
FOE
FOUT
CONTROLLER
TIMER
REGISTER
/ AIRQ
/ TIRQ
INTERRUPTS
CONTROLLER
ALARM
REGISTER
32.768
kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• FOE pin enables output on/off control.
DI
DO
CLK
CE1
CE0
BUS
INTERFACE
CIRCUIT
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
Timer function
• Timer function can be set up between
1/4096 second and 4095 minutes.
• It is recorded automatic to TF-bit at the time of event
occurrence,and possible to output with /TIRQ pin output
(open-drain output).
Interrupt
function
RAM
128 bit
• Alarm interrupt function , and timer interrupt function.
( 8 bit
16 )
Pin Function
Signal Name Input/Output
CE0
CE1
CLK
DI
DO
FOUT
FOE
/ AIRQ
/ TIRQ
V
DD
GND
Input
Input
Input
Input
Output
Output
Input
Output
Output
-
-
The chip enabled input pin 0.
The chip enabled input pin 1.
Terminal connection/External dimensions
RX
4581NB
(Unit:mm)
Function
( It has a built -in pull-down resistance )
(It does not have a built -in pull-down resistance
)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
GND
0.5
22.
21.
6.3
Max.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
CE1
CE0
DI
DO
CLK
/TIRQ
/AIRQ
FOE
FOUT
V
DD
20.
19.
18.
17.
The shift clock input pin for serial data transfer.
The data input pin for serial data trasfer.
The data output pin for serial data trasfer.
This pin outputs the reference clock signal at 32.768 kHz ( CMOS output ).
High impedance at the time of output off.
The input pin for the FOUT output control.
The open drain output pin for alarm and time update interrupts.
The open drain output pin for timer interrupt.
Connected to a positive power supply.
Connected to a ground.
4.8
1.3
0.1
16.
15.
14.
13.
12.
5.0
0.2
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
*
Refer to application manual for details.
Current consumption characteristics
Item
Symbol
Conditions
CE0,CE1=GND
FOE=GND
FOUT;
output OFF
(Hi-z)
Current
Consumption
T
a
=-40Cto+85C
Min.
V
DD
=5V
V
DD
=3V
V
DD
=5V
-
Typ.
0.6
Max.
1.2
Unit
I
BK
A
-
0.4
0.8
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Symbol
f/f
Conditions
T
a
=+25C
V
DD
=3.0V
T
a
=+25C
V
DD
=3.0V
Rating
B:
523
3Max.
Unit
10
s
6
CE0,CE1=GND
FOE= V
DD
I
32k
FOUT;
-
8.0
20.0
A
t
STA
32.768kHz output ON
V
DD
=3V
CL=30pF
-
5.0
12.0
Please
ask for tighter tolerance. (
Equivalent to 1 minute of monthly deviation)
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.
►Designed
for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ).
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
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 circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does
not assume any liability for the occurrence of 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
