概述
数据手册RX-8025SA:AA3 概述
REAL TIME CLOCK, PDSO14, SOP-14
RX-8025SA:AA3 数据手册
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PDF下载Real time clock module
Product Number (Please contact us)
RX-8025SA : Q41802552xxxx00
RX-8025NB : Q41802592xxxx00
REAL TIME CLOCK MODULE (I2C-Bus)
High-Stability
RX - 8025SA/NB
Built-in 32.768 kHz crystal unit
: Frequency adjusted for high accuracy
(5106/Ta=+25C)
Interface Type
: I2C-Bus Interface(400kHz)
Operating voltage range: 1.70Vto5.5V
Wide Timekeeper voltage range
Various detection Functions
Low backup current
: 1.15Vto5.5V
: Ex. Oscillation stop detection function
: 0.48A/3V(Typ.)
Actual size
RX-8025SA
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
RX-8025NB
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
Features built-in 32.768kHz crystal unit
• Frequency adjusted forhigh accuracy.
(5106 / Ta=+25C)
Alarm_W Register
( Min,Hour,Week )
Comparator_W
Comparator_D
FOUT
FOE
32 kHz
Output
Control
VDD
Voltage
Detect
(Equivalent to 13 seconds of monthly deviation)
Alarm_D Register
( Min,Hour )
The various detection function
• Power supply voltage monitoring function
(with selectable detection threshold)
• Stop detection function
Divider
Correc
-tion
Time Counter
( Sec,Min,Hour,Week,Day,Month,Year )
Div.
OSC
• Power-on reset detection function
Alarm function and Timer function
• Timer function produces a periodic interruption signal.
As for the Alarm function an optional combination is produced.
(Date of the week , time , minute)
Address
Decoder
Address
Register
SCL
OSC
Detect
I/O
Control
SDA
GND
/ INTA
/ INTB
Interrupt Control
Shift Register
Pin Function
Terminal connection/External dimensions
(Unit:mm)
Signal
Name
SCL
RX8025SA
RX8025NB
Input / output
Function
N.C.
22.
Input
Bi-directional
Serial clock input pin
Data input and output pin
32.768kHzclock output pin with the output
control function. (C-MOS)
1. FOE
2. VDD
1. N.C.
2. SCL
3. FOUT
4. N.C.
5. TEST
14. N.C.
13. SDA
SDA
N.C.
21.
3. (GND)
4. TEST
5. FOUT
6. SCL
7. SDA
20. N.C.
N.C.
19.
FOUT
FOE
Output
Input
FOE
input
L
/CLEN1 /CLEN2
FOUT
output
12.
11. GND
10.
9. N.C.
8. N.C.
/INTB
bit
X
0
0
1
bit
X
0
1
0
N.C.
N.C.
N.C.
N.C.
N.C.
18.
17.
16.
15.
14.
13.
12.
OFF (LOW)
32.768 kHz
32.768 kHz
32.768 kHz
OFF(LOW)
5.0
H
4.8
/INTA
1
1
8.
9. GND
10.
11. N.C.
/INTB
1.30.1
/ INTA
/ INTB
Output
Output
6.
V
DD
Interrupt output A pin (N-ch open drain)
Interrupt output B pin (N-ch open drain)
/INTA
7.40.2
7. FOE
5.00.2
Used by the manufacture for testing.
(Do not connect externally.)
TEST
SOP14 pin
SON22 pin
VDD
Connected to a positive power supply.
Connected to a ground.
GND
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
Current consumption characteristics
Ta=-40C to +85C
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Item
Symbol
Conditions
Min. Typ. Max. Unit
VDD
=5V
VDD
=3V
Power voltage
Clock voltage
Operating
VDD
VCLK
3.0
3.0
5.5
5.5
V
V
1.7
1.15
fSCL=0Hz
-
-
0.60 1.80
0.48 1.20
FOE=GND
FOUT;output
OFF(LOW)
IBK
µA
µA
TOPR
-40
+25
+85
C
temperature
Curent
Consumption
fSCL=0Hz
Frequency characteristics
VDD
=5.5V
VDD,FOE=5.5V
FOUT;output ON
(Output=OPEN;
CL=0pF)
I32k
-
3.0
6.5
Item
Symbol
Conditions
Range
AA: 551)
AC: 052)
Unit
Ta=+25C
VDD=3.0V
Ta=+25C
VDD=2.0V
Ta=+25C
Frequency
tolerance
Oscillation
start-up time
Frequency voltage
characteristics
6
6
f/f
10
s
1Max.
tSTA
Power supply detection voltage
Ta=-30C to +70C
Min. Typ. Max. Unit
Item
Symbol
Conditions
f/V
1Max.
10
VDD=2.0Vto5.5V
High-voltage mode
VDETH
VDD pin
VDD pin
1.90 2.10 2.30
1.15 1.30 1.45
V
V
1)2)Equivalent to 13 seconds of monthly deviation (excluding offset).
Low-voltage mode
VDETL
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
ISO 14000 is an international standard for environmental
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.
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,
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
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 ).
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
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