Datasheet

Actual size
Real time clock module
 Block diagram
Overview
BUS
INTERFACE
CIRCUIT
CE 1
CLK
DATA
32.768 kHz
CE 0
CONTROL
REGISTER
SHIFT REGISTER
ALARM
REGISTER
TIMER
REGISTER
CLOCK and
CALENDAR
INTERRUPTS
CONTROLLER
OUTPUT
CONTROLLER
DIVIDER
CONTROL LINE
FOUT
/ TIRQ
/ AIRQ
OSC
FCON
•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)
•Timer function
• 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
• 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).
 Functions are compatible with RX-4574LC.
 Terminal connection/External dimensions
(Unit:mm)
RTC4574SA
1.
GND
14.
FCON
2.
FOUT
13.
CE1
3.
N.C.
12.
DATA
4.
N.C.
11.
CLK
5.
N.C.
10.
/TIRQ
6.
N.C.
9.
/AIRQ
7.
VDD
10.1 0.2
5.0
7.40.2
3.20.1
1.27
8.
CE0
SOP14 pin
RTC4574JE
1.
VDD
20.
N.C.
2.
FOUT
19.
N.C.
3.
CE0
18.
N.C.
4.
/AIRQ
17.
N.C.
5.
/TIRQ
16.
N.C.
6.
CLK
15.
N.C.
7.
DATA
14.
N.C.
8.
CE1
13.
N.C.
9.
FCON
12.
N.C.
10.
GND
7.00.3
5.4
6.00.2
1.5Max.
0.65
11.
N.C.
VSOJ20 pin
RTC4574NB
1.
GND
22.
N.C.
2.
FCON
21.
N.C.
3.
N.C.
20.
N.C.
4.
CE1
19.
N.C.
5.
DATA
18.
N.C.
6.
CLK
17.
N.C.
7.
/TIRQ
16.
N.C.
8.
/AIRQ
15.
N.C.
9.
CE0
14.
N.C.
10.
FOUT
13.

11.
VDD
4.8
6.3Max.
5.00.2
0.5
1.30.1
12.

SON22 pin
The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
Specifications (characteristics)
Refer to application manual for details.
 Recommended Operating Conditions
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Power voltage
VDD
-
1.6
3.0
5.5
V
Clock voltage
VCLK
-
1.6
3.0
5.5
V
Operating
temperature
TOPR
-
-40
+25
+85
°C
 Frequency characteristics
Item
Symbol
Conditions
Rating
Unit
Frequency
tolerance
f/f
Ta=+25°C
VDD=3.0V
B: 523

10
6
Oscillation
start-up time
tSTA
Ta=+25°C
VDD=1.6V
3Max.
s
 Please ask for tighter tolerance.(Equivalent to ±1 minute of monthly deviation)
 Current consumption characteristics
Ta=-40Cto+85C
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Current
Consumption
IBK
CE0,CE1=GND
FOUT;output OFF
(Hi-z)
VDD
=5V

-
1.0
2.0
µA
VDD
=3V

-
0.5
1.0
I32k
CE0=GND
CE1=VDD
FOUT;
32.768kHzoutput ON
CL=30pF
VDD
=5V

-
8.0
20.0
µA
VDD
=3V

-
5.0
12.0
REAL TIME CLOCK MODULE (SPI-Bus)
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A/3V(Typ.)
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
RTC-4574JE
RTC-4574NB
RTC-4574SA
Product Number (Please contact us)
RTC-4574SA : Q41457452000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q4145749x000100