Real time clock module
RTC-4574SA / JE / NB
Product number (please refer to page 5)
SERIAL REAL TIME CLOCK MODULE
Q4145745x000200
Q4145749xxxxx00
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Q4145747x000100
Built-in crystal unit allows adjustment-free efficient operation.
Serial interface which can be controlled by three signal lines.
Alarm interrupt function for day of week, day, hour, and minute.
Timer interrupt function which can be set up between 1/4096 second and 255 minutes .
Dedicated interrupt output of the two systems (alarm and regular cycle) which allows software masking.
Ability to detect stopping of oscillation and time update.
Wide range of interface voltage and clock voltage between 1.6 V and 5.5 V.
Low power consumption at 0.5 µA / 3 V. (Typ.)
Available for lead (Pb) - free soldering.
Available for lead (Pb) - free terminal.
RTC-4574SA
RTC-4574JE
RTC-4574NB
Actual size
The details are mentioned in the application manual.
Specifications (characteristics)
Absolute Max. rating
Item
Supply voltage
Input voltage
Output voltage
Storage temperature
Symbol
V
DD
V
IN
V
OUT1
V
OUT2
T
STG
Condition
V
DD
to GND
Input Pin
_______ _______
TIRQ, AIRQ
F
OUT
, DATA
Stored as bare product
after unpacking
External dimensions / Terminal connection
Max.
+7.0
V
DD
+0.3
GND -0.3
+8.0
V
DD
+0.3
-55
+125
Min.
-0.3
Unit
V
5.0
(Unit: mm)
(SOP 14-pin)
#14
#8
°C
#1
10.1±0.2
Operating range
Item
Symbol
Condition
Power voltage
V
DD
−
Clock voltage
V
CLK
−
Operating temperature T
OPR
No condensation
Min.
1.6
-40
Max.
5.5
+85
Unit
V
#7
No.
1
2
3
4
5
6
7
Pin terminal
GND
F
OUT
N.C
N.C
N.C
N.C
V
DD
No.
14
13
12
11
10
9
8
Pin terminal
F
CON
CE
1
DATA
CLK
TIRQ
AIRQ
CE
0
3.1
3.2±0.1
7.4±0.2
0° to 10°
0.6
0.35
1.27
1.2
0.05 Min.
0.15
°C
Frequency characteristics
Item
Frequency tolerance
Oscillation start up time
Frequency temperature
characteristics
Frequency voltage characteristics
Aging
Symbol
Δf/f
t
STA
T
op
f/V
fa
Condition
Ta = +25
°C,
V
DD
= 3 V
Ta = +25
°C,
V
DD
= 1.6 V
Ta = -20 °C to +70 °C
Reference at +25 °C
Ta = +25 °C, V
DD
= 1.6 V to 5.5 V
Ta = +25 °C, V
DD
= 3 V
Range
B: 5 ±23∗
3 Max.
+10
-120
±2
±5
Unit
x 10
-6
s
x 10
-6
x 10
-6
/ V
x 10
-6
/ year
#20
#11
(VSOJ 20-pin)
∗
Please ask tighter tolerance.
#1
#10
7.0±0.3
No.
1
2
3
4
5
6
7
8
9
10
Pin terminal
V
DD
F
OUT
CE
0
AIRQ
TIRQ
CLK
DATA
CE
1
F
CON
GND
No.
20
19
18
17
16
15
14
13
12
11
Pin terminal
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
DC characteristics
Item
Standby current 1
Standby current 2
Input voltage
(GND = 0 V, VDD = 1.8 V to 5.5 V, Ta = -40 °C to +85 °C)
Typ.
1.0
0.5
–
Max.
2.0
1.0
V
DD
0.2 V
DD
5.0
3.0
6.3 Max.
1.3
1.5 Max.
5.4
6.0
±0.2
Output voltage 1
Symbol
Condition
Min.
I
DD2
V
DD
= 5 V
CE
0
____
1
= GND
, CE
_____
–
I
DD2
V
DD
= 3 V DATA , AIRQ, T IRQ V
DD
V
IH
0.8 V
DD
CE
0
, CE
1
, CLK,
DATA, F
CON
pins
V
IL
0
V
OH1
V
DD
= 5 V I
OH
= -1 mA
4.5
DATA, F
OUT
pins 2.0
V
OH2
V
DD
= 3 V I
OH
= -100 µA
V
OH3
2.9
DATA, F
OUT
pins
V
OL1
V
OL2
V
DD
= 5 V
V
DD
= 3 V
I
OL
= 1 mA
DATA, F
OUT
pins
I
OL
= 100 µA
DATA, F
OUT
pins
GND
Unit
µA
V
0.65
0.22 0 Min.
(0.75)
(0.75)
(SON 22-pin)
–
Output voltage 2
V
OL3
V
OL4
V
OL5
GND +0.1
GND +0.25
GND +0.4
0.5
#1
V
DD
= 5 V
______
= 1 mA
I
OL
______
AIRQ, TIRQ pins
V
DD
= 3 V
#11
0.2
1.3
±0.1
Metal may be exposed on the top or bottom of this product. This won't affect any quality, reliability or electrical spec.
83
5.0±0.2
GND +0.5
GND +0.8
V
#22
#14
No.
1
2
3
4
5
6
7
8
9
10
11
Pin terminal
GND
F
CON
N.C
CE
1
DATA
CLK
TIRQ
AIRQ
CE
0
F
OUT
V
DD
No.
22
21
20
19
18
17
16
15
14
(13)
(12)
Pin terminal
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
-
-
4.8
Real time clock module
Register table
Address
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Register symbol
Sec
Min
Hour
Day of Week
Day
Month
Year
Minutes Alarm
Hours Alarm
Week Alarm
Day Alarm
F
OUT
control
Timer interrupt control
Count Down Timer
Control 1
Control 2
bit 7
fos
fr
fr
fr
fr
fr
Year 80
AE
AE
AE
AE
FE
TE
Timer 128
0
0
bit 6
S 40
Min 40
0
W6
0
0
Year 40
A-Min 40
∗
A-W 6
∗
∗
∗
Timer 64
0
TEST
bit 5
S 20
Min 20
Hour 20
W5
Day 20
0
Year 20
A-Min 20
A-Hr20
A-W 5
A-Day 20
FD
4
TD
1
Timer 32
0
STOP
bit 4
S 10
Min 10
Hour 10
W4
Day 10
Month 10
Year 10
A-Min 10
A-Hr10
A-W 4
A-Day 10
FD
3
TD
0
Timer 16
TI / TP
RESET
bit 3
S8
Min 8
Hour 8
W3
Day 8
Month 8
Year 8
A-Min 8
A-Hr8
A-W 3
A-Day 8
∗
∗
Timer 8
AF
HOLD
bit 2
S4
Min 4
Hour 4
W2
Day 4
Month 4
Year 4
A-Min 4
A-Hr4
A-W 2
A-Day 4
FD
2
∗
Timer 4
TF
0
bit 1
S2
Min 2
Hour 2
W1
Day 2
Month 2
Year 2
A-Min 2
A-Hr2
A-W 1
A-Day 2
FD
1
∗
Timer 2
AIE
0
bit 0
S1
Min 1
Hour 1
W0
Day 1
Month 1
Year 1
A-Min 1
A-Hr1
A-W 0
A-Day 1
FD
0
∗
Timer 1
TIE
0
AC characteristics
Item
CLK clock cycle
CLK H Pulse Width
CLK L Pulse Width
CE setup time
CE hold time
CE recovery time
Write data setup time
Write data hold time
Write data disable delay time
Read data delay time
Output disable time
Rise and fall time
FOUT duty ratio
(32.768 kHz output)
Symbol Control
t
CLK
t
WH
t
WL
t
CS
t
CH
t
CR
t
DS
t
DH
t
WZ
t
RD
C
L
= 50 pF
t
RZ
t
RF
Duty
–
C
L
= 50 pF
R
L
= 10 kΩ
–
(GND = 0 V, Ta = -40 °C to +85 °C)
V
DD
= 3.0 V ± 10 % V
DD
= 5.0 V ± 10 %
Unit
Min. Max. Min. Max.
800
350
Timing chart
50 %
CE
CLK
t
CS
t
WH
t
WL
50 %
t
RF
t
CLK
10 %
t
RF
90 %
t
CH
t
CR
400
–
600
100
80
0
300
–
200
100
35
65
175
–
300
ns
50
0
120
–
100
50
40
60
%
Data Read
DATA
Data Write
DATA
t
DS
t
DH
D0
D1
D6
D7
D0
D6
(Write data)
D7
(Setup code, setup address)
t
WZ
D7
t
RD
D0
D6
(Read data)
t
RZ
D7
90 %
10 %
D0
D1
D6
(Setup code, setup address)
From here the DATA pin turns into the output mode.
Block diagram
32.768 kHz
OSC
F
OUT
F
CON
TIRQ
AIRQ
DATA
CLK
CE1
CE0
Bus interface circuit
Shift register
Divider
Control line
Clock and Calendar
Output controller
Interrupts controller
Timer register
Alarm register
Control register
84
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