Real time clock module
Epson Toyocom
Product Number (Please contact us)
RTC-8564JE : Q41856471000100
Low current consumption
RTC-8564NB : Q41856491000200
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RTC - 8564JE
/
NB
•Built in frequency adjusted 32.768 kHz crystal unit.
•Interface Type
I2C-Bus Interface (400 kHz)
1.8 V to 5.5 V
•Operating voltage range
•Timekeeper voltage range
•Low backup current
1.0 V to 5.5 V / -20 °C to +70 °C
275 nA / 3.0 V(Typ.)
•32.768 kHz frequency output function׃
C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer,
and power supply voltage monitoring function
Actual size
RTC-8564JE
RTC-8564NB
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
• Interface Type
32.768 kHz
•I2C-Bus Interface. ( Hi-speed bus specifications 400 kHz )
I2C-Bus slave address : read A3h and write A2h
Control 1
00
CRYSTAL
OSC
Voltage Detector
DIVIDER
Control 2
Seconds
Minutes
Hours
• Low Timekeeper voltage range
•1.0 V to 5.5 V / Ta = -20 °C to +70 °C
•1.1 V to 5.5 V / Ta = -40 °C to +85 °C
CLKOUT
CLKOE
OUTPUT
CONTROL
Days
Weekdays
• 32.768 kHz frequency output function
•CLKOUT pin output (C-MOS output ), CL=30 pF
•CLKOE pin enables output on/off control.
•Output selectable
Month / Century
Years
/ INT
Minutes Alarm
Hour Alarm
CONTROL
LOGIC
<32.768 kHz, 1024 Hz, 32 Hz, 1 Hz>
I2C-BUS
INTERFACE
SCL
SDA
Day Alarm
• The various interrupt function
•Timer function can be set up between 1/4096 second and
255 minutes.
Weekday Alarm
CLKOUT frequency
Timer Control
Timer
• Alarm function can be set to any combination of day of
week, hour, or minute.
ADDRESS
REGISTER
0F
POR
Functions are compatible with RX-8564 LC series.
Pin Function
Terminal connection / External dimensions
Signal Name Input/Output
Function
Serial clock input pin.
Bi-directional Data input and output pin.
RTC − 8564 JE
RTC − 8564 NB
SCL
SDA
Input
1. / INT
2. GND
3. ( GND )
4. N.C.
5. SDA
6. SCL
7. CLKOUT
DD
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. N.C.
2. N.C.
3. CLKOE
DD
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. N.C.
13. N.C.
12. N.C.
32.768 kHz clock output pin with the
output control function. (C-MOS)
CLKOE pin control the condition of
CLKOUT with FE-bit, etc.
CLKOUT
Output
4.
V
5. CLKOUT
6. SCL
CLKOE pin
input
FE
bit
1
CLKOUT pin
output
4.8
5.4
Output
( C-MOS )
( LOW )
( LOW )
( LOW )
HIGH
7. SDA
CLKOE
/INT
Input
OFF
OFF
OFF
0
8.
V
1
0
1.3 ±
0.1
1.5Max.
8.
9. GND
10.
( GND )
LOW
9. CLKOE
10. N.C.
11. N.C.
−
13.
Output
Interrupt output ( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
5.0
±
0.2
±
6.0 0.2
11. N.C.
/ INT
−
12.
DD
V
−
−
VSOJ 20 pin
SON 22 pin
GND
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality , reliability or electrical spec.
Specifications (characteristics)
Refer to application manual for details.
!
!
Current consumption characteristics
Recommended Operating Conditions
Ta = −40 °C to +85 °C
Item
Symbol
Condition
Min.
Typ.
3.0
Max.
5.5
Unit
V
Item
Symbol
Condition
Min. Typ. Max. Unit
DD
V
Power voltage
Clock voltage
Operating
1.8
CLK
V
LOW
V
3.0
5.5
V
DD
= 5 V
V
f
SCL = 0 Hz
330 800
nA
OPR
T
°
C
-40
+25
+85
CLKOE = GND
temperature
BK
I
CLKOUT ;
!
Low voltage detection
DD
= 3 V
V
275 700
output OFF ( LOW )
Item
Symbol
Condition
Typ.
0.9
0.9
Max.
1.0
1.1
Unit
V
V
Current
Consumtion
°
°
°
+70 C
T
T
a
a
= -20
= -40
C
C
Low voltage
VLOW
f
SCL
= 0 Hz
detection
°
+85 C
DD
V
2.5
1.5
3.4
2.2
DD
CLKOE = V
= 5 V
!
Frequency characteristics
µ
A
32k
I
CLKOUT ;
Item
Symbol
Condition
Rating
Unit
32.768 kHz output ON
(Output=OPEN ;
CL = 0 pF)
V
DD
= 3 V
a
°
Frequency
T
= +25 C
6
−
∆
±
×
10
f / f
5
23 *
tolerance
DD
V
= 3.0 V
* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
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