Real time clock module
Epson Toyocom
Product Number (Please contact us)
RX-4801SA : X1B000021xxxx00
RX-4801JE : X1B000041xxxx00
Built-in 32.768 kHz-DTCXO, High Stability
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX - 4801SA JE
/
•Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface Type
: 4-wire serial interface
: 1.6 V to 5.5 V
•Interface voltage range
•Temp.compensated voltage range: 2.2 V to 5.5 V
•Wide Timekeeper voltage range : 1.6 V to 5.5 V
Actual size
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
RX-4801SA
RX-4801JE
Block diagram
Overview
• High Stability
•UA
32.768 kHz
± 1.9 x 10-6
/
0 ºC to +40 ºC
( Equivalent to 5 seconds of month deviation )
± 3.4 x 10-6
-40 ºC to +85 ºC
( Equivalent to 9 seconds of month deviation )
•UB
± 3.8 x 10-6
( Equivalent to 10 seconds of month deviation )
± 5.0 x 10-6
-40 ºC to +85 ºC
32kHz
DTCXO
/
/
0 ºC to +50 ºC
CLOCK
and
/
DIVIDER
CALENDAR
( Equivalent to 13 seconds of month deviation )
FOUT
FOE
• 32.768 kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• Output selectable
FOUT
CONTROLLER
TIMER
REGISTER
< 32.768 kHz, 1024 Hz, 1 Hz >
INTERRUPT
CONTROLLER
ALARM
REGISTER
/ INT
• The various interrupt
• Timer Function can be set up between
1/ 4096 second and 255 minutes.
• Alarm Function can be set to day of week,
day, hour, or minute.
D I
CONTROL
REGISTER
DO
CLK
CE
INTERFACE
CIRCUIT
and
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)
RX − 4801 SA
RX−4801JE
Signal Name I / O
Function
1. / INT
2. GND
3. T2(Vpp)
4. DO
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. N.C.
1. CE
2. CLK
3. FOUT
4. N.C.
5. TEST
DD
14. DI
/ INT
GND
Output The open drain output for interrupt.
-
13. DO
12. T2(V
Connected to a ground
* Use by the manufacture for testing.
( Do not connect externally.)
PP
)
T2(VPP)
-
5. DI
11. GND
DO
D I
CE
Output The data output pin for serial data transfer.
input The data input pin for serial data transfer.
input The chip enable input pin.
5.0
6. CE
5.4
10.
/ INT
7. CLK
8. FOUT
9. N.C.
1.5Max. 13. N.C.
6.
V
9. N.C.
8. N.C.
CLK
input
The shift clock input pin for serial data transfer.
The pin outputs the reference clock signal.
( CMOS output )
12. N.C.
11. VDD
7.4 ± 0.2
7. FOE
6.0 ± 0.2
10. FOE
FOUT
Output
SOP − 14 pin
VSOJ − 20 pin
FOE
VDD
input
-
The input pin for the FOUT output control.
Connected to a positive power supply
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.
Electrical Characteristics
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Item
Symbol
VDD
Condition
Min.
1.6
Typ.
3.0
Max.
5.5
Unit
V
Interface voltage
Temp. compensated
Voltage
Interface voltage
Frequencytemperaturecharacteristics
10
VTEM
Temp. compensated voltage
2.2
3.0
5.5
V
5
Clock voltage
Operating temperature
VCLK
TOPR
-
-
1.6
−40
3.0
+25
5.5
+85
V
ºC
32.768 kHz DTCXO
0
-5
∗1
Ta = 0 ºC to +40 ºC
UA
±1.9
±3.4
±3.8
±5.0
∗2
∗3
∗4
Ta = -40 ºC to +85 ºC
−6
Stability
Δ f / f
× 10
-10
Ta = 0 ºC to +50 ºC
UB
-15
Ta = -40 ºC to +85 ºC
Tuning fork X'tal
Current consumption (1)
Current consumption (2)
Backup Mode
VDD = 5V
-20
-25
-30
IBK1
IBK2
-
-
1.2
0.8
3.4
2.1
FOE = GND,
μA
/INT = VDD
FOUT output : OFF
VDD = 3V
∗1 )
∗2 )
-45 -35 -25 -15
-5
5
15
25
35
45
55
65
75
85
Equivalent to 5 seconds of month deviation.
Equivalent to 10 seconds of month deviation.
Equivalent to 9 seconds of month deviation.
∗4 )
Equivalent to 13 seconds of month deviation.
∗3 )
Temperature (ºC)
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