RX-8581SA Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (I2C-Bus)

Real time clock module
REAL TIME CLOCK MODULE (I²C-Bus)
RX - 8581SA/JE/NB
Built-in frequency adjusted 32.768kHz crystal unit.
Interface Type
: I²C-Bus Interface(400kHz)
Operating voltage range
: 1.8V to5.5V
Wide Timekeeper voltage range : 1.6Vto5.5V
Low backup current
: 0.45A/3V(Typ.)
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
Actual size
* The I²C-Bus is a trademark of NXP Semiconductors
RX-8581SA
Product Number (Please contact us)
RX-8581SA : Q41858152xxxx00
RX-8581JE : Q41858171xxxx00
RX-8581NB : Q41858192000200
RX-8581JE
RX-8581NB
Block diagramç
32.768 kHz
OSC
FOUT
FOE
/ INT
DIVIDER
FOUT
CONTROLLER
INTERRUPTS
CONTROLLER
SCL
SDA
I²C-BUS
INTERFACE
CIRCUIT
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
ç ç ç Overviewç
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 Interface Type
• I²C-Bus interface. (Hi-speed bus specifications 400kHz)
I²C-Bus slave address:read A3h and write A2h
32.768 kHz frequency output function
• FOUT pin output (C-MOS output ), CL=30 pF
• 32.768 kHz clock frequency output. (Duty 50 ±5 %)
Timer function
• Timer interrupt 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
(N-ch open-drain output).
Interrupt function
• Alarm interrupt function, Time update interrupt function.
Terminal connection/External dimensionsç
1. N.C.
2. SCL
3. SDA
4. N.C.
5. GND
6. N.C.
7. /INT
RX8581SA
5.0
7.40.2
SOP14 pin
14. FOUT
13. N.C.
12. N.C.
11. VDD
10. FOE
9. N.C.
8. N.C.
RX8581JE
1. N.C.
2. N.C.
3. FOE
4. VDD
5. FOUT
6. SCL
7. SDA
8. (VDD)
9. GND
10. /INT
5.4
6.00.2
20.
19.
18.
17.
16.
15.
14.
1.5Max. 13.
12.
11.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
VSOJ20 pin
(Unit:mm)ç
RX8581NB
1. /INT
2. GND
3. (VDD)
4. N.C.
5. SDA
6. SCL
7. FOUT
8. VDD
9. FOE
10. N.C.
11. N.C.
22. N.C.
21. N.C.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
4.8
16. N.C.
15. N.C.
1.30.1
14. N.C.
5.00.2
13. 
12. 
SON22 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)
 Refer to application manual for details.
 Recommended Operating Conditions
Item
Symbol Conditions
Min. Typ. Max.
Power voltage
VDD
-
1.8 3.0 5.5
Clock voltage
VCLK
-
1.6 3.0 5.5
Operating
temperature
TOPR
-
-40 +25 +85
 Frequency characteristics
Item
Symbol
Conditions
Rating
Frequency
tolerance
FOUT output Duty
f/f
tw/t
Ta=+25C
VDD=3.0V
Ta=-40Cto+85C
VDD=2.4Vto5.5V
B: 523
505
Please ask for tighter tolerance.( Equivalent to 1 minute of monthly deviation )
Unit
V
V
C
Unit
10^6
%
 Current consumption characteristics
Item Symbol
Conditions
Ta=-40Cto+85C
Min. Typ. Max. Unit
fSCL=0Hz
FOE=GND
IBK
VDD
=5V
-
FOUT;
output OFF(LOW)
VDD
=3V
-
Current
Consumption
fSCL=0Hz
FOE=VDD
VDD
=5V
-
I32k _FOUT;
32.768kHz output ON ^VDD
CL=30pF
=3V
-
0.65 1.2
µA
0.45 0.8
8.0 20.0
µA
5.0 12.0