Real time clock module
Epson Toyocom
Product Number (Please contact us)
RTC-4574SA : Q41457451000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q41457491000100
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RTC - 4574 SA
/
JE
/
NB
•
Built in frequency adjusted 32.768 kHz crystal unit.
•
Interface Type
:
3-wire serial interface
•
Operating voltage range
:
1.6 V to 5.5 V
•
Wide Timekeeper voltage range
:
1.6 V to 5.5 V
•
Low backup current
:
0.5
µ
A / 3 V ( Typ. )
•
32.768 kHz frequency output function
:
C-MOS output With Control Pin
Actual size
•
The various functions include full calendar, alarm, timer.
RTC-4574SA
RTC-4574JE
RTC-4574NB
Block diagram
32.768 kHz
CONTROL LINE
Overview
•
32.768 kHz frequency output function
• FOUT pin output (C-MOS output ), CL=30 pF
• Output frequency selectable from1/30 Hz to 32.768 kHz
(32 Values)
OSC
DIVIDER
CLOCK and
CALENDAR
FOUT
FCON
/ TIRQ
/ AIRQ
DATA
CLK
CE 1
CE 0
•
Timer function
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
ALARM
REGISTER
CONTROL
REGISTER
INTERFACE
CIRCUIT
SHIFT REGISTER
∗
Functions are compatible with RX - 4574 LC.
TIMER
REGISTER
• Timer function can be set up between 1/4096 second and
255 minutes.
• It is recorded automatically to TF-bit at the time of event
occurrence, and it’s possible to output with /TIRQ pin output
(open-drain output).
• Selectable one time mode or repeat mode.
•
Alarm function
BUS
• Alarm function can be set to any combination of day of week,
hour, or minute.
• It is recorded automatically to AF-bit at the time of event
occurrence, and it’s possible to output with /AIRQ pin
output (open-drain output).
Terminal connection / External dimensions
RTC
−
4574 SA
1.27
(Unit:mm)
RTC
−
4574 JE
RTC
−
4574 NB
20.
19.
7.0
±
0.3
3.
4.
5.
6.
7.
8.
9.
10.
CE0
/ AIRQ
/ TIRQ
CLK
DATA
CE1
FCON
GND
6.0
±
0.2
5.4
18.
17.
16.
15.
14.
13.
12.
11.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
3.
4.
5.
6.
7.
8.
9.
10.
11.
N.C.
CE1
DATA
CLK
/ TIRQ
/ AIRQ
CE0
FOUT
V
DD
SON
−
22 pin
5.0
±
0. 2
4.8
6.3
Max.
2.
3.
4.
5.
6.
7.
FOUT
N.C.
N.C.
5.0
10.1
±
0.2
2.
13.
12.
11.
10.
CE1
DATA
CLK
/ TIRQ
/ AIRQ
CE0
FOUT
N.C.
2.
FCON
0.5
1.
GND
14.
FCON
0.65
1.
V
DD
N.C.
1.
GND
22.
21.
20.
19.
18.
17.
16.
1.3
±
0.1
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
−
−
N.C.
3.2
±
0.1
15.
14.
13.
12.
N.C.
V
DD
7.4
±
0 .2
9.
8.
1.5
Max.
SOP
−
14 pin
VSOJ
−
20 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)
!
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Symbol
V
DD
V
CLK
T
OPR
Condition
-
-
-
Min.
1.6
1.6
−
40
Typ.
3.0
3.0
+25
Max.
5.5
5.5
+85
Unit
V
V
°C
∗
Refer to application manual for details.
!
Current consumption characteristics
Item
Symbol
Condition
V
DD
CE0, CE1 = GND
I
BK
Current
Consumption
T
a
= -40
°C
to +85
°C
Min.
=5V
V
DD
=3V
V
DD
=5V
V
DD
=3V
Typ.
1.0
Max.
2.0
Unit
!
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Symbol
∆
f/f
Condition
T
a
= +25 °C
V
DD
= 3.0 V
T
a
= +25 °C
V
DD
= 1.6 V
Rating
5
±
23
∗
3 Max.
Unit
×
10
−
6
s
FOUT ;output OFF
( Hi - z )
µA
0.5
1.0
CE0 = GND
CE1 = V
DD
I
32k
FOUT ;
32.768 kHzoutput ON
CL = 30 pF
8.0
20.0
µA
t
STA
5.0
12.0
∗
Please ask for tighter tolerance.(Equivalent
to 1 minute of monthly deviation)
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EPSONTOYOCOM [ EPSON TOYOCOM ]
