Real time clock module
SERIAL REAL TIME CLOCK MODULE WITH TEMPERATURE SENSOR
RTC-4701JE/NB RX- 4702CF
Product number (please refer to page 2)
Q4 1 4 7 0 1 7 x 0 0 0 2 0 0
Q4 1 4 7 0 2Ax x x x x 0 0
•
•
•
•
Q 414 7 0 1 9 x0 0 0 2 00
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 . (Except for RX-4702CF)
• OVF interrupt function based on 12-bit additional counter.
• Ability to detect stopping of oscillation and time update.
• Automatic adjustment for leap year.
• Built-in temperature sensor.(voltage output RTC-4701JE/NB :-7.6 mV/ °C Typ. RX-4702CF :-7.8 mV/ °C Typ.)
• Wide range of voltage between 1.6 V and 5.5 V.
• Low power consumption at 0.5 µA/3 V. (Typ.)
The details are mentioned in the application manual.
http://www.epsondevice.com
RTC-4701JE
RTC-4701NB
RX-4702CF
Actual size
Specifications (characteristics)
Absolute Max. rating
Item
Supply voltage
Input voltage
Output voltage
Storage temperature
Symbol
V
DD
V
IN
V
OUT1
V
OUT2
Condition
V
DD
to GND
Min.
-0.3
Max.
+7.0
V
DD
+0.3
Unit
External dimensions/Terminal connection
RTC-4701JE
(VSOJ 20-pin)
R4701
E 1234A
7.0
±0.3
1.3
0.65
No.
1
2
3
4
5
6
7
8
9
10
(Unit: mm)
Pin terminal
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
GND
Input Pin
TIRQ, AIRQ, IRQ
F
OUT,
DATA
Stored as bare product
after unpacking
V
V
DD
+0.3
-55
+125
°C
1.5 Max.
Operating range
Item
Power voltage
Clock voltage
T
STG
5.4
GND-0.3
+8.0
Pin terminal No.
20
V
DD
19
F
OUT
18
CE
17
AIRQ
16
TIRQ
15
CLK
14
DATA
13
FOE
12
VTEMP
11
SOFF
6.2 Max
Symbol
V
DD
V
CLK
V
OPR
Condition
—
—
Min.
1.6
-40
Max.
5.5
+85
Unit
V
°C
0.22
(0.75)
(0.75)
Operating temperature
No condensation
RTC-4701NB
(SON 22-pin)
6.3 Max.
4.8
5.0
±0.2
Frequency characteristics
Item
Frequency tolerance
Symbol
∆f/fo
t
STA
T
op
f/V
fa
Condition
Range
5±23∗
3 Max.
+10
-120
±2 Max.
±5 Max.
Unit
x 10
s
x 10
-6
x 10
-6
/V
x 10
-6
/year
0.5
-6
R4701
E 1234A
0.2
Ta=+25 °C, V
DD
=3 V
Ta=+25 °C,V
DD
=3.0 V
Oscillation start up time
Frequency temperature
characteristics
Frequency voltage characteristics
Aging
Ta=-10 to +70 °C,
Reference at +25 °C
Ta=+25 °C,V
DD
=1.6 to 5.5 V
Ta=+25 °C, V
DD
=3 V
∗
Please ask tighter tolerance.
Item
Standby current 1
Standby current 2
Input voltage
Metal may be exposed on the top or bottom of this product. This won't affect any quality, reliability or electrical spec.
DC characteristics
Symbol
I
DD1
I
DD2
V
IH
V
IL
I
LK
R
DWN1
R
DWN2
V
OH1
V
OH2
V
OH3
V
OL1
V
OL2
(GND=0 V, V
DD
=1.6 V to 5.5 V,Ta=-40
°C
to +85
°C)
Condition
Min.
CE,FOE,SOFF=GND
V
DD
=5 V AIRQ,TIRQ,IRQ=V
DD
—
32.768 kHz output is OFF.
V
DD
=3 V Sensor output is OFF.
Typ.
1.0
0.5
Max.
Unit
2.0
RX-4702CF
(SON 10-pin)
5.0
±0.2
#10
#6
1.3
±0.1
No. Pin terminal
1
GND
2
SOFF
3
VTEMP
4
FOE
5
DATA
6
CLK
7
TIRQ
8
AIRQ
9
CE
10
F
OUT
11
V
DD
No. Pin terminal
22
N.C
21
N.C
20
N.C
19
N.C
18
N.C
17
N.C
16
N.C
15
N.C
14
N.C
13
—
12
—
0.4
0.26
1.0
1.0
CE,CLK,DATA,
FOE,SOFF
CLK,DATA,FOE,SOFF
V
IN
=V
DD
or GND
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
CE pins
V
IN
=V
DD
I
OH
=-
1 mA
DATA,F
OUT
pins
0.8V
DD
GND-0.3
-0.5
75
150
—
V
DD
+0.3
0.2V
DD
0.5
V
#1
#5
3.2
±0.2
Pulldown R1
Pulldown R2
150
300
300
600
5.0
3.0
GND+0.5
kΩ
4.5
2.0
2.9
Output voltage 1
V
DD
=3 V I
OH
=-
100
µ
A
DATA,F
OUT
pins
V
DD
=5 V
V
DD
=3 V
I
OL
=
1 mA
Temperature sensor characteristics
V,Ta=-40
°C
to +85
°C
GND=0
Parameter
Temperature output
voltage
Symbol
V
TEMP
Condition
Min.
Typ.
1.48
Max.
Unit
V
DATA,F
OUT
pins
I
OL
=
100
µ
A
DATA,F
OUT
pins
—
GND
GND+0.8
GND+0.1
GND+0.25
GND+0.4
V
Output precision
Temperature
sensitivity
Linearity
T
ACR
V
SE
∆NL
Ro
Ta=+25 °C, GND based
output voltage VTEMP
pin, V
DD
=2.7 V to 5.5 V
Ta=+25 °C, V
DD
=2.7 V to 5.5 V
-40 °C
≤
Ta
≤
+85 °C,
V
DD
=2.7 V to 5.5 V
RTC-4701JE/NB
RX-4702CF
1.2 Max.
Input leakage current
µA
0.6
No. Pin terminal
1
CE
2
CLK
3
DATA
4
SOFF
5
GND
No. Pin terminal
10
V
DD
9
VTEMP
8
IRQ
7
FOE
6
FOUT
0.35
µA
E4702
123A
±5.0
-7.1
-7.3
-7.6
-7.8
°C
Output voltage 2
V
OL3
V
OL4
V
OL5
V
DD
=5 V
I
OL
=
1 mA
AIRQ, TIRQ, IRQ pins
V
DD
=3 V
V
OUT
=GND or V
DD
,
Leakage current
I
OZ
FOUT,DATA
, AIRQ, TIRQ, IRQ pins
-0.5
0.5
µA
Output resistance
-40 °C
≤
Ta
≤
+85 °C,VDD=2.7 to 5.5 V
Ta=+25 °C, VTEMP pin,
V
DD
=2.7 V to 5.5 V GND
standard and V
DD
standard
-8.1
-8.3
±2.0
3.0
mV/°C
%
kΩ
1.0
79
Real time clock module
Register table
RTC-4701 JE/NB : BANK0
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
Day of week Alarm
Day Alarm
–
Timer setup
Timer Couner
Control 1
Control 2
bit 7
fos
fr
fr
fr
fr
fr
Year 80
AE
AE
AE
AE
–
TE
128
0
0
bit 6
S 40
Min 40
0
bit 5
S 20
Min 20
Hour 20
W5
Day 20
0
bit 4
S 10
Min 10
Hour 10
W4
Day 10
Month 10
Year 10
A-Min 10
A-Hr 10
A-W 4
A-Day 10
–
TD
0
16
TI/TP
RESET
bit 4
16
OVF
0
0
bit 3
S8
Min 8
Hour 8
W3
Day 8
Month 8
Year 8
A-Min 8
A-Hr 8
A-W 3
A-Day 8
–
∗
8
AF
HOLD
bit 3
8
2048
–
AF
HOLD
bit 2
S4
Min4
Hour4
W2
Day 4
Month 4
Year 4
A-Min 4
A-Hr 4
A-W 2
A-Day 4
–
∗
4
TF
0
bit 1
S2
Min 2
Hour 2
W1
Day 2
Month 2
Year 2
A-Min 2
A-Hr 2
A-W 1
A-Day 2
–
∗
2
AIE
0
bit 0
S1
Min 1
Hour 1
W0
Day 1
Month 1
Year 1
A-Min 1
A-Hr 1
A-W 0
A-Day 1
–
∗
1
TIE
0
W6
0
C
Year 40
A-Min 40
∗
A-W 6
∗
–
∗
64
0
Year 20
A-Min 20
A-Hr 20
A-W 5
A-Day 20
–
TD
1
32
0
RX-4702CF : BANK0
Address
B
C
D
E
F
TEST
bit 6
64
AC1
TEST1
0
STOP
bit 5
32
AC0
0
0
Register symbol
Additional counter 1
Additional counter 2
Control 3
Control 1
Control 2
bit 7
128
fr
FOES
0
0
bit 2
4
1024
ACIE
0
0
bit 1
2
512
ACE
AIE
0
bit 0
1
256
SON
0
0
RTC-4701 JE/NB : BANK1
Address
B
C
D
E
F
Register symbol
Additional counter 1
Additional counter 2
–
–
Control 3
TEST0
STOP
RESET
bit 7
128
fr
–
–
FOES
bit 6
64
AC1
–
–
TEST
bit 5
32
AC0
–
–
–
bit 4
16
OVF
–
–
–
bit 3
8
2048
–
–
–
bit 2
4
1024
–
–
ACIE
bit 1
2
512
–
–
ACE
bit 0
1
256
–
–
SON
0 : Always set this bit to“0”. Registers 0 to A are the same in BANK0 and BANK1.
AC characteristics
Item
(GND=0 V,Ta=-40 ˚C to +85 ˚C)
V
DD
=3.0 V±10 %
V
DD
=5.0 V±10 %
Unit
Symbol
Control
Min.
600
Timing chart
50 %
Max.
Min.
350
Max.
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
t
CLK
t
WH
t
WL
t
CS
t
CH
t
CR
t
DS
t
DH
t
WZ
t
DO
t
RD
t
RZ
t
RF
Duty
—
—
CE
300
t
CS
t
WH
t
WL
50 %
t
RF
t
CLK
10 %
t
RF
90 %
t
CH
t
CR
175
CLK
—
—
400
75
300
50
ns
Data Write
DATA
t
DS
t
DH
D0
D1
D6
D7
D0
D6
(Write data)
D7
Write data disable delay time
Output mode switching time
Read data delay time
Output disable time
Rise and fall time
FOUT duty ratio
(32.768 kHz output)
(Setup code, setup address)
0
0
t
WZ
t
DO
D7
D0
t
RZ
D7
90 %
10 %
Data Read
120
C
L
=50 pF
C
L
=50 pF
R
L
=10 kΩ
—
300
200
100
40
DATA
D0
D1
D6
D6
(Read data)
—
100
(Setup code, setup address)
t
RD
50
40
From here the DATA pin turns into the output mode.
60
60
%
Block diagram
32.768 kHz
Control line
OSC
V
TEMP
SOFF
F
OUT
F
OE
TIRQ
AIRQ
IRQ
4701JE/NB
4701JE/NB
4702CF
Divider
Degital Trimming register
Temperature
Sensor
Fout controller
Clock and Calendar
Timer register
Alarm register
Control register
and
System Controller
Interrupts controller
DATA
CLK
CE
Bus interface circuit
80
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