Real time clock module
Epson Toyocom
Low current consumption
I
2
C-Bus INTERFACE REAL TIME CLOCK MODULE
RTC - 8564 JE
/
NB
•Built
in frequency adjusted 32.768 kHz crystal unit.
•Interface
Type
׃
I
2
C-Bus Interface (400 kHz)
•Operating
voltage range
׃
1.8 V to 5.5 V
•Timekeeper
voltage range
׃
1.0 V to 5.5 V / -20
°C
to +70
°C
•Low
backup current
׃
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
*
The I C-Bus is a trademark of
NXP Semiconductors
2
Actual size
RTC-8564JE
RTC-8564NB
Block diagram
32.768 kHz
CRYSTAL
OSC
Voltage Detector
Overview
•
Interface Type
2
Control 1
Control 2
Seconds
Minutes
Hours
DIVIDER
Days
Weekdays
Month / Century
Years
00
•I C-Bus Interface. ( Hi-speed bus specifications 400 kHz )
2
∗
I C-Bus slave address : read A3h and write A2h
•
Low Timekeeper voltage range
CLKOUT
CLKOE
OUTPUT
CONTROL
•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
•
32.768 kHz frequency output function
/ INT
SCL
SDA
I C-BUS
INTERFACE
2
CONTROL
LOGIC
Minutes Alarm
Hour Alarm
Day Alarm
Weekday Alarm
CLKOUT frequency
Timer Control
Timer
0F
•CLKOUT pin output (C-MOS output ), CL=30 pF
•CLKOE pin enables output on/off control.
•Output selectable
<32.768 kHz, 1024 Hz, 32 Hz, 1 Hz>
•
The various interrupt function
ADDRESS
POR
REGISTER
•Timer function can be set up between 1/4096 second and
255 minutes.
• Alarm function can be set to any combination of day of
week, hour, or minute.
∗
Functions are compatible with RX-8564 LC series.
Pin Function
Signal Name Input/Output
SCL
SDA
CLKOUT
Input
Function
Serial clock input pin.
32.768 kHz clock output pin with the
output control function. (C-MOS)
CLKOE pin control the condition of
CLKOUT with FE-bit, etc.
CLKOE pin
input
FE
bit
1
0
1
0
CLKOUT pin
output
Output
( C-MOS )
OFF
( LOW )
OFF
( LOW )
OFF
( LOW )
Terminal connection / External dimensions
RTC
−
8564 JE
0.65
(Unit׃mm)
RTC
−
8564 NB
20.
19.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
/ INT
GND
( GND )
N.C.
SDA
SCL
CLKOUT
V
DD
CLKOE
N.C.
N.C.
5.0
±
0.2
4.8
1.3
±
0.1
0.5
6.3
Max.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
N.C.
N.C.
CLKOE
V
DD
CLKOUT
SCL
SDA
( GND )
GND
/ INT
22.
21.
20.
19.
18.
17.
16.
15.
14.
13.
12.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
−
−
Bi-directional Data input and output pin.
Output
7.0
±
0.3
5.4
1.5
Max.
6.0
±
0.2
18.
17.
16.
15.
14.
13.
12.
11.
CLKOE
Input
HIGH
LOW
/INT
V
DD
GND
Output
-
-
Interrupt output
( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
VSOJ
−
20 pin
SON
−
22 pin
Metal may be exposed on the top or bottom of this product. This will not affect any quality , reliability or electrical spec.
Specifications (characteristics)
!
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Item
Low voltage
detection
Item
Frequency
tolerance
Symbol
V
DD
V
CLK
T
OPR
Condition
-
-
-
Min.
1.8
V
LOW
-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
Condition
Min.
V
DD
=5V
T
a
=
−40 °C
to +85
°C
Typ.
330
Max.
800
Unit
f
SCL
= 0 Hz
I
BK
CLKOE = GND
CLKOUT ;
!
Low voltage detection
Symbol
V
LOW
Condition
T
a
= -20
°
C
∼
+70
°
C
T
a
= -40
°C ∼
+85
°C
Condition
T
a
= +25
°
C
V
DD
= 3.0 V
Typ.
0.9
0.9
Max.
1.0
1.1
Unit
V
V
Unit
×
10
−6
Current
Consumtion
nA
275
700
V
DD
output OFF ( LOW )
=3V
V
DD
=5V
!
Frequency characteristics
Symbol
∆
f/f
Rating
5
±
23 *
f
SCL
= 0 Hz
CLKOE = V
DD
I
32k
CLKOUT ;
2.5
3.4
µ
A
32.768 kHz output ON
V
DD
(Output=OPEN ;
=3V
CL = 0 pF)
1.5
2.2
*
Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
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