Real time clock module
Product Number (Please contact us)
RX-4571LC : Q414571C2000100
RX-4571NB : Q41457192000100
RX-4571SA : Q41457152000100
REAL TIME CLOCK MODULE (SPI-Bus)
LOW BACKUP VOLTAGE
RX - 4571LC/NB/SA
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: 3-wire serial interface
Operating voltage range
Wide Timekeeper voltage range
Low backup current
: 1.6Vto5.5V
: 1.0Vto5.5V / Ta=+25C
: 0.32A(Typ.)/3V
32.768 kHz frequency output function : C-MOS output With Control Pin
Real-time clock function
Clock/calendar function, auto leap year correction function,
alarm interrupt function, etc.
Actual size
RX-4571LC
RX-4571NB
RX-4571SA
Block diagram
Overview
32.768 kHz frequency output function
• FOUT pin output(C-MOS output), CL=30 pF
CONTROL LINE
32.768 kHz
Timer function
• Timer function which can be set up between
1/4096 second and 4095 minutes.
DIVIDER
CLOCK and
CALENDAR
OSC
Alarm function
• Alarm function can be set to any combination of day,
day of week, hour, or minute.
FOUT
FOE
FOUT
TIMER
CONTROLLER
REGISTER
REGISTER
Pin Function
Signal
Name
Function
Input/Output
INTERRUPTS
CONTROLLER
ALARM
/IRQ
The chip enabled input pin 0.
( It has a built -in pull-down resistance )
Input
CE
Input
The shift clock input pin for serial data transfer.
The data input / output pin for serial data transfer.
CLK
DIO
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
BUS
DIO
CLK
CE
Bi-directional
INTERFACE
CIRCUIT
32.768kHzclock output pin with the output control
function. (C-MOS)
FOUT
Output
FOE pin control the condition of FOUT with
FSEL1-bit, FSEL0-bit, etc.
FOE
Input
/ IRQ
Output
Interrupt output (N-ch open drain)
Connected to a positive power supply.
Connected to a ground.
DD
V
GND
Terminal connection/External dimensions
(Unit:mm)
RX4571LC
RX4571NB
4571SA
RX
1. FOE
2. DIO
3. (GND)
4. CLK
5. CE
22. N.C.
21. N.C.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. N.C.
1. FOE
2. N.C.
3. DIO
4. CLK
5. CE
12.
V
1. GND
2. N.C.
3. CE
14. FOUT
13. N.C.
12. N.C.
11. N.C.
DD
11. N.C.
10. N.C.
9. N.C.
8. /IRQ
7. FOUT
4. CLK
5. DIO
6. N.C.
7. FOE
6. GND
7. N.C.
8. N.C.
9. FOUT
10. /IRQ
DD
5.0
2.4
4.8
10.
/IRQ
1.30.1
9. N.C.
8. VDD
13.
12.
6. GND
7.40.2
2.8
5.00.2
11.
V
SOP - 14 pin
VSOJ12pin
SON22 pin
*Stop using the glue
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.
Any glue must never use it after soldering LC-package to a circuit board.This product has glass on the back side
of a package.When glue invasions between circuit board side and glass side, then glass cracks by thermal
expansion of glue.In this case
LC-package
a
crystal oscillation stops.Consider glue abolition or glue do not touch to
Specifications (characteristics)
Refer to application manual for details.
Recommended Operating Conditions
Current consumption characteristics
Ta=-40Cto+85C
Item
Symbol
VDD
Conditions
Min.
Typ.
Max.
Unit
Symbol
Conditions
Min.
Typ.
0.40
Max.
Unit
Power voltage
1.6
1.0
1.1
3.0
3.0
3.0
5.5
5.5
5.5
V
V
V
VDD
=5V
CE=GND
/IRQ=OFF
Ta=+25C
Ta=-40to+85C
-
1.00
Clock voltage
VCLK
TOPR
IBK
A
Operating
temperature
FOUT;
-40
+25
+85
C
VDD
=3V
-
-
-
0.32
8.0
0.95
14.0
8.5
output OFF(Hi-z)
Frequency characteristics
CE=GND
/IRQ=OFF
VDD
=5V
Item
Symbol
Conditions
Rating
Unit
Ta=+25C
FOUT;
Frequency
tolerance
Oscillation
6
I32k
A
f/f
B: 523 *
10
VDD=3.0V
Ta=+25C
VDD=1.6V
32.768kHz output
VDD
=3V
5.0
ON
s
1Max.
tSTA
CL=30pF
start-up time
* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)