Real time clock module
Epson Toyocom
Product Number (Please contact us)
RX-4801SA : X1B000021xxxx00
Built-in 32.768 kHz-DTCXO, High Stability
SERIAL-INTER FACE REA L TIME C LOCK MODULE
RX - 4801 SA
•Built
in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface
Type
:
4-wire serial interface
•Interface
voltage range
:
1.8 V to 5.5 V
•Temp.compensated
voltage range: 2.2 V to 5.5 V
•Wide
Timekeeper voltage range
:
1.6 V to 5.5 V
•32.768
kHz frequency output function
:
C-MOS output With Control Pin Actual size
•The
various functions include full calendar, alarm, timer.
Block diagram
Overview
•
High Stability
•UA
-6
/
± 1.9 x 10
( Equivalent to
-6
/
± 3.4 x 10
( Equivalent to
•UB
-6
/
± 3.8 x 10
( Equivalent to
-6
/
± 5.0 x 10
( Equivalent to
32.768 kHz
32kHz
DTCXO
0 ºC to +40 ºC
5 seconds of month deviation )
-40 ºC to +85 ºC
9 seconds of month deviation )
0 ºC to +50 ºC
10 seconds of month deviation )
-40 ºC to +85 ºC
13 seconds of month deviation )
DIVIDER
CLOCK
and
CALENDAR
FOUT
FOE
FOUT
CONT ROLLER
TIMER
REGIST ER
/ INT
INTERRUPT
CONT ROLLER
ALARM
REGIST ER
•
32.768 kHz frequency output function
•
FOUT pin output (C-MOS output), CL=30 pF
•
Output selectable
< 32.768 kHz, 1024 Hz, 1 Hz >
•
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.
DI
DO
CLK
CE
INT ERFACE
CIRCUIT
CONTROL
REGIST ER
and
SYST EM
CONTROLLER
Pin Function
Signal Name
CE
CLK
FOUT
TEST
V
DD
FOE
/ INT
GND
T2(V
PP
)
DO
DI
Pin No.
1
2
3
5
6
7
10
11
12
13
14
I/ O
input
input
Output
input
-
input
Output
-
-
Output
input
The chip enable input pin.
The shift clock input pin for serial data transfer.
The pin outputs the refarence clock signal.
( CMOS output )
* Use by the manufacture for testing.
( Do not connect externally.)
Connected to a positive power supply
The input pin for the FOUT output control.
The open drain output for interrupt.
Connected to a ground
* Use by the manufacture for testing.
( Do not connect externally.)
The data output pin for serial data transfer.
The data input pin for serial data transfer.
Function
Terminal connection / External dimensions
RX
−
4801 SA
1.
2.
3.
4.
5.
6.
7.
CE
CLK
FOUT
N.C.
5.0
1.27
(Unit:mm)
14.
10.1
±
0.2
DI
DO
T2(V
PP
)
GND
/ INT
N.C.
N.C.
13.
12.
11.
10.
TEST
3.2
±
0.1
V
DD
FOE
7.4
±
0 .2
9.
8.
SOP
−
14 pin
Metal may be exposed on the top or bottom of this product.
This w ill not affect any quality, reliability or electrical spec.
Specifications (characteristics)
!
Electrical Characteristics
Item
Symbol
Interface voltage
V
DD
Temp. compensated
V
TEM
voltage
Clock voltage
V
CLK
Operating temperatue T
OPR
Stability
Current consumption
(1)
Current consumption
(2)
∗
1 )
∗3
)
∗
Refer to application manual for details.
!
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Condition
Interface voltage
Temp. compensated voltage
-
-
Ta = 0 ºC to +40 ºC
UA
Ta = -40 ºC to +85 ºC
Ta = 0 ºC to +50 ºC
UB
Ta = -40 ºC to +85 ºC
Backup Mode
V
DD
= 5V
FOE = GND,
/INT = V
DD
FOUT output : OFF V
DD
= 3V
∗
2 )
Min.
1.8
2.2
1.6
−
40
Typ.
3.0
3.0
3.0
+25
±1.9
∗
1
±3.4
∗
2
±3.8
∗
3
±5.0
∗
4
1.2
0.8
Max.
5.5
5.5
5.5
+85
Unit
V
V
Frequency tolerance ( ×10
-6
)
10
5
Frequency temperature characteristics
V
°
C
×
10
−6
32.768 kHz DTCXO
0
-5
-10
-15
Tuning fork X'tal
-20
-25
-30
-45
-35
-25
-15
-5
5
15
25
35
45
55
65
75
85
∆
f /f
I
BK1
I
BK2
-
-
3.4
µ
A
2.8
Equivalent to 5 seconds of month deviation. Equivalent to 9 seconds of month deviation.
Equivalent to 10 seconds of month deviation.
∗4
)
Equivalent to 13 seconds of month deviation.
Temperature (ºC)
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EPSONTOYOCOM [ EPSON TOYOCOM ]
