Real time clock module
Low current consumption /
Small size, low profile model package
I
2
C-Bus INTERFACE REAL TIME CLOCK MODULE
Epson Toyocom
Product Number (Please contact us)
RX-8564LC : Q418564C0xxxx00
RX - 8564 LC
•
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
•
Wide Timekeeper voltage range
:
1.0 V to 5.5 V / T
a
= +25
°
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.
Actual size
*
The I
2
C-Bus is a trademark of
NXP Semiconductors
Block diagram
32.768 kHz
CRYSTAL
OSC
Voltage Detector
Overview
•
Interface Type
Control 1
Control 2
Seconds
Minutes
00
• I C hi-speed bus specifications. ( 400 kHz )
2
∗
I C-Bus slave address : read A3h and write A2h
2
•
Low Timekeeper voltage
CLKOUT
CLKOE
Hours
OUTPUT
CONTROL
DIVIDER
Days
Weekdays
Month / Century
Years
• 1.0 V to 5.5 V / T
a
= +25
°C
• 1.3 V to 5.5 V / T
a
=
−40 °C
to +85
°C
•
32.768 kHz frequency output function
• 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>
/ INT
SCL
SDA
I C-BUS
INTERFACE
2
CONTROL
LOGIC
Minutes Alarm
Hour Alarm
Day Alarm
Weekday Alarm
CLKOUT frequency
•
The various interrupt function
• 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 RTC-8564 JE / NB series.
ADDRESS
REGISTER
POR
Timer Control
Timer
0F
Pin Function
Signal Name
SCL
SDA
Input / Output
Input
Bi-directional
Serial clock input pin
Data input and output pin
32.768 kHz clock output pin with the output control function. (C-MOS)
CLKOE pin control the condition of CLKOUT pin with FE-bit, FD1-bit,
FD0-bit.
C L K O E p in
i n p ut
FE
b it
C L K O U T pi n
o u tp ut
Terminal connection / External dimensions
Function
0.5
(Unit:mm)
RX
−
8564 LC
1.
2.
3.
4.
5.
6.
N.C.
N.C.
N.C.
N.C.
/ INT
GND
2.8
2.4
1. 2 Max.
12.
3.6
N.C.
CLKOE
V
DD
CLKOUT
SCL
SDA
11.
10.
9.
8.
7.
CLKOUT
Output
H IG H
CLKOE
Input
LO W
1
0
1
0
O utp ut
O FF
O FF
O FF
( C -M O S )
( LO W )
( LO W )
( LO W )
/INT
V
DD
GND
Output
-
-
Interrupt output ( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
VSOJ
−
12pin
Specifications (characteristics)
!
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
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
V
DD
Min.
=5V
V
DD
=3V
V
DD
=5V
T
a
= -40
°C
to +85
°C
Typ.
330
Max. Unit
800
nA
f
SCL
= 0 Hz
I
BK
Current
Consumption
CLKOE = GND
CLKOUT ;
output OFF ( LOW )
275
700
!
Low voltage detection
Item
Low voltage
detection
Symbol
Condition
T
a
= +25
°
C
Min.
Typ.
0.9
0.9
0.9
Max.
1.0
1.2
1.3
Unit
V
V
V
f
SCL
= 0 Hz
CLKOE = V
DD
I
32k
2.5
3.4
µA
V
LOW
T
a
= -20
°
C to +70
°
C
T
a
= -40
°
C to +85
°
C
!
Frequency characteristics
Item
Frequency
tolerance
Symbol
∆
f/f
Condition
T
a
= +25
°
C
V
DD
= 3.0 V
Rating
5
±
23 *
Unit
×
10
−
6
CLKOUT ;
32.768 kHz Output ON V
DD
=3V
(Output=OPEN ;
CL = 0 pF)
1.5
2.2
*
Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
http://www.epsontoyocom.co.jp
EPSONTOYOCOM [ EPSON TOYOCOM ]
