Real time clock module
Epson Toyocom
Product Number (Please contact us)
RX-8801SA : X1B000011xxxx00
Built-in 32.768 kHz-DTCXO, High Stability
I
2
C-Bus INTERFACE REAL TIME CLOCK MODULE
RX - 8801 SA
•Built
in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface
Type
:
I
2
C-Bus Interface (400 kHz)
•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.
*
The I
2
C-Bus is a trademark of NXP Semiconductors
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
CONTROLLER
TIMER
REGISTER
/ INT
INTERRUPT
CONTROLLER
ALARM
REGISTER
•
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.
CONTROL
REGISTER
SCL
SDA
INTERFACE
CIRCUIT
and
SYSTEM
CONTROLLER
Pin Function
Signal Name
T1(CE)
SCL
FOUT
TEST
V
DD
FOE
/ INT
GND
T2(V
PP)
SDA
Pin No.
1
2
3
5
6
7
10
11
12
13
I/ O
input
input
Output
input
-
input
Output
-
-
I/ O
Function
* Use by the manufacture for testing.
( Do not connect externally.)
Serial clock input pin
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.
Interrupt output ( N-ch open drain )
Connected to a ground
* Use by the manufacture for testing.
( Do not connect externally.)
Data input and output pin
Terminal connection / External dimensions
RX
−
8801 SA
1.
2.
3.
4.
5.
6.
7.
T1(CE)
SCL
FOUT
N.C.
5.0
1.27
(Unit:mm)
14.
10.1
±
0.2
N.C.
SDA
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
= 5 V
FOE = GND,
/INT = V
DD
FOUT output : OFF V
DD
= 3 V
∗
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 ]
