Real time clock module
Product Number (Please contact us)
RX-8803SA: X1B000152xxxx00
RX-8803LC: X1B000142xxxx00
Built-in 32.768 kHz-DTCXO, High Stability
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RX - 8803 SA/LC
Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
1/100s resolution Time register
Interface Type
Interface voltage range
: I2C-Bus interface (400kHz)
: 1.6 V to 5.5 V
Temp. compensated voltage range : 2.2 V to 5.5 V
Clock supply voltage range : 1.6 V to 5.5 V
Selectable clock output (32.768 kHz, 1024 Hz, 1 Hz)
Actual size
RX-8803SA
RX-8803LC
The various functions include full calendar, alarm, timer, EVIN input.
*The I2C-BUS is a trademark of NXP Semiconductors.
Block diagram
Overview
High Stability
UA ± 3.4 x 10-6
/ -40 ºC to +85 ºC
32.768 kHz
( Equivalent to 9 seconds of month deviation )
UB ± 5.0 x 10-6
-40 ºC to +85 ºC
( Equivalent to 13 seconds of month deviation )
UC -30 ºC to +70 ºC
± 5.0 x 10-6
AA (+5 ± 5.0) x 10-6
+25 ºC
/
32kHz
DTCXO
/
/
High Resolution: 1/100s Time register with capture buffer
CLOCK
DIVIDER
and
CALENDAR
32.768 kHz frequency output function
FOUT pin output (C-MOS output), CL=30 pF
Output selectable: 32.768 kHz, 1024 Hz, 1 Hz
FOE
FOUT
CONTROLLER
TIMER
FOUT
REGISTER
The various interrupt
Timer Function can be set between 1/ 4096 second and
4095 minutes.
EVIN
/ INT
ALARM
REGISTER
INTERRUPT
CONTROLLER
Alarm Function can be set to day of week, day, hour, or minute.
EVIN input.
CONTROL
REGISTER
and
SDA
SCL
INTERFACE
CIRCUIT
Time synchronize function with 1PPS signal input
Register compatibility: upper compatible with RX-8801.
SYSTEM
CONTROLLER
*It is possible to use it by the terminal connection as
32.768 kHz-DTCXO.
Pin Function
Terminal connection/External dimensions
(Unit:mm)
Signal Name
I / O
Function
Use by the manufacture for testing.
( Do not connect externally.)
Serial clock input pin.
The pin outputs the reference clock signal.
( CMOS output )
Use by the manufacture for testing.
( Do not connect externally. RX-8803SA only.)
Connected to a positive power supply
The input pin for the FOUT output control.
External event input.
RX8803SA
RX8803LC
T1(CE)
SCL
input
input
1. T1(CE)
2. SCL
3. FOUT
4. N.C.
5. TEST
6. VDD
14. N.C.
13. SDA
12. T2(VPP)
11. GND
10. /INT
9. EVIN
8. N.C.
1. N.C.
2. FOE
3. VDD
12. EVIN
11. /INT
10. GND
9. T2(Vpp)
8. SDA
FOUT
Output
TEST
input
5.0
2.4
4. FOUT
5. SCL
6. T1(CE)
VDD
FOE
EVIN
/ INT
GND
-
input
input
7.40.2
7. N.C.
7. FOE
2.8
Output Interrupt output (N-ch. open drain).
SOP14 pin
-
Connected to a ground
VSOJ12pin
Use by the manufacture for testing.
( Do not connect externally.)
Data input and output pin.
Metal may be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec.
T2(VPP)
SDA
-
I/O
Specifications (characteristics)
Refer to application manual for details.
Electrical Characteristics
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Item
Symbol
VDD
Condition
Interface voltage
Min.
1.6
Typ.
3.0
Max.
5.5
Unit
V
Frequency temperature characteristics
Operating voltage
10
Temp. compensated
Voltage
VTEM
Temp. compensated voltage
2.2
3.0
5.5
V
5
32.768 kHz DTCXO
0
-5
Clock supply voltage
Operating temperature
VCLK
TOPR
-
-
1.6
3.0
5.5
V
+25
+85
ºC
40
1
-10
UA
Ta= -40 ºC to +85 ºC
±3.4
±5.0
UB
UC
AA
Ta=-40 ºC to +85 ºC
Ta= -30 ºC to +70 ºC
Ta=+25 ºC
-15
6
2
Stability
f/f
10
Tuning fork X'tal
-20
-25
-30
3
5 ±5.0
Current consumption (1)
Current consumption (2)
Backup Mode
FOE = GND,
/INT = VDD
IDD1
IDD2
VDD = 5V
VDD = 3V
-
-
0.75
3.4
2.1
A
-45 -35 -25 -15
-5
5
15
25
35
45
55
65
75
85
0.75
FOUT output : OFF
Temperature (ºC)
1)
2)3)
Equivalent to 9 seconds of month deviation.
Equivalent to 13 seconds of month deviation. ( excluding offset )
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