Real time clock module
Epson Toyocom
Low current consumption
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RTC - 8564 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
•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
Actual size
RTC-8564JE
RTC-8564NB
2
* The I C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
32.768 kHz
CRYSTAL
OSC
Voltage Detector
• Interface Type
2
00
Control 1
•I C-Bus Interface. ( Hi-speed bus specifications 400 kHz )
2
∗ I C-Bus slave address : read A3h and write A2h
Control 2
Seconds
• Low Timekeeper voltage range
Minutes
CLKOUT
CLKOE
•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
Hours
OUTPUT
DIVIDER
CONTROL
Days
• 32.768 kHz frequency output function
Weekdays
•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>
Month / Century
Years
/ INT
Minutes Alarm
CONTROL
Hour Alarm
LOGIC
2
SCL
SDA
• The various interrupt function
Day Alarm
I C-BUS
•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.
Weekday Alarm
INTERFACE
CLKOUT frequency
ADDRESS
Timer Control
REGISTER
POR
0F
Timer
∗ Functions are compatible with RX-8564 LC series.
Terminal connection / External dimensions
Serial clock input pin.
Bi-directional Data input and output pin.
CLKOUT
Output
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
CLKOE
HIGH
Input
LOW
FE
bit
1
0
1
0
Interrupt output
CLKOUT pin
output
Output
( C-MOS )
OFF
( LOW )
OFF
( LOW )
OFF
( LOW )
/INT
Output
( N-ch open drain )
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
1.
N.C.
2.
N.C.
3.
CLKOE
4.
VDD
5.
CLKOUT
6.
SCL
7.
SDA
8.
( GND )
9.
GND
10.
/ INT
5.4
1.5 Max.
6.0 ± 0.2
RTC − 8564 NB
20.
N.C.
1.
/ INT
19.
N.C.
2.
GND
22.
18.
N.C.
3.
( GND )
17.
N.C.
4.
N.C.
16.
N.C.
5.
SDA
15.
N.C.
0.5
SDA
RTC − 8564 JE
Function
Input
7.0 ± 0.3
SCL
0.65
Signal Name Input/Output
(Unit‫׃‬mm)
6.
SCL
7.
CLKOUT
8.
VDD
9.
CLKOE
14.
N.C.
13.
N.C.
12.
N.C.
10.
N.C.
11.
N.C.
11.
N.C.
6.3 Max.
Pin Function
4.8
1.3 ± 0.1
5.0 ± 0.2
VSOJ − 20 pin
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.
13.
−
12.
−
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)
∗ Refer to application manual for details.
! Current consumption characteristics
! Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Symbol
VDD
VCLK
Condition
-
Min.
1.8
VLOW
Typ.
3.0
3.0
Max.
5.5
5.5
Unit
V
V
TOPR
-
-40
+25
+85
°C
Item
IBK
! Low voltage detection
Item
Low voltage
detection
Symbol
VLOW
Condition
Ta = -20 °C ∼ +70 °C
Ta = -40 °C ∼ +85 °C
Typ.
0.9
0.9
Max.
1.0
1.1
Unit
V
V
! Frequency characteristics
Item
Frequency
tolerance
Symbol
∆f/f
Symbol
Condition
= +25 °C
DD
V = 3.0 V
Ta
Rating
5 ± 23 *
Unit
× 10−6
* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
http://www.epsontoyocom.co.jp
Typ.
Max.
330
800
fSCL = 0 Hz
CLKOE = GND
CLKOUT ;
VDD
=3V
275
700
VDD
=5V
2.5
3.4
32.768 kHz output ON VDD
(Output=OPEN ;
=3V
CL = 0 pF)
1.5
2.2
fSCL = 0 Hz
CLKOE = VDD
I32k
Min.
VDD
output OFF ( LOW )
Current
Consumtion
Ta = −40 °C to +85 °C
Condition
=5V
Unit
nA
µA
CLKOUT ;