63
Real time clock module
Specifications (characteristics)
Absolute Max. rating
Operating range
Frequency characteristics and current consumption
characteristics
Electrical characteristics
External dimensions
Terminal connection
RTC-62421
(Unit: mm)
23.1 max.
3.3 min.
0.2 min.
6.8
2.8 max.
0.05 min.
4.2 max.
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
(V
DD
) and V
DD
are to have the same level of voltage
.
Do not connect it to any external terminals.
NC is not connected internally.
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
RTC-62421
RTC-62423
RTC-62423
7.62
0.25
2.5
16.3 max.
7.9
12.2 max.
0.2
1.0
0.3
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
STD. P
CS
0
ALE
A
0
A
1
A
2
A
3
RD
GND
WR
D
3
D
2
D
1
D
0
CS
1
(V
DD
)
(V
DD
)
V
DD
62423
STD. P
CS
0
NC
ALE
A
0
NC
A
1
NC
A
2
A
3
RD
GND
WR
D
3
D
2
D
1
NC
NC
D
0
CS
1
NC
(V
DD
)
(V
DD
)
V
DD
62421
90
to
105
0
to
10
RTC62421 A
EPSON 6053 C
RTC62423 A
EPSON 9220
4-bit REAL TIME CLOCK MODULE
RTC-62421/62423
Builtin crystal unit allows adjustment-free efficient operation.
Low standby voltage and current consumption (1.8A at 2V).
Wide range of operating temperature (from -40C to +85C).
24H/12H changeable and leap year automatically adjustable (gregorian
calendar).
Similar mounting method (RTC-62423) to that used for universal type SMD IC.
Pins and functions are compatible with the MSM6242 series.
Item
Power source voltage
Input and output voltage
Storage temperature
Soldering condition
Symbol
V
DD
V
I/O
T
STG
T
SOL
Condition
Ta=25C
RTC-62421
RTC-62423
RTC-62421
RTC-62423
Specifications
-0.3 to 7.0
-0.3 to V
DD
+0.3
-55 to +85
-55 to +125
Under 260C within 10 sec.
(lead part) (package should
be less than 150C)
Twice at under 260C within
10 sec. or under 230C
within 3 min.
Unit
V
C
Item
Operating voltage
Operating temperature
Data holding voltage
CS
1
data holding time
Operation restoring time
Symbol
V
DD
T
OPR
V
DH
t
CDR
t
R
Condition
Refer to the data
holding timing
Specifications
4.5 to 5.5
-40 to +85
2.0 to 5.5
2.0 min.
Unit
V
C
V
s
Item
Frequency tolerance
Frequency temperature
characteristics
Aging
Shock resistance
Current consumption
Symbol
f/fo
fa
S.R.
I
DD1
I
DD2
Ta=25C
V
DD
=5V
62421 A
62421 B
62423 A
62423
Condition
Three drops on a
hard board from 75 cm
or 3000G x 0.3ms x 1/2 sine
wave x 3 directions
CS
1
=0V
V
DD
=5V
V
DD
=2V
Specifications
10
50
20
50
+10/-120
+10/-220
5 max.
10 max.
30 max.
1.8 max.
Unit
ppm
ppm/Y
ppm
A
Item
"H" input voltage (1)
"L" input voltage (1)
Input leak current (1)
Input leak current (2)
"L" output voltage (1)
"H" output voltage
"L" output voltage (2)
OFF leak current
Input capacity
"H" input voltage (2)
"L" input voltage (2)
Symbol
V
IH1
V
IL1
I
LK1
I
LK2
V
OL1
V
OH
V
OL2
I
OFFLK
C
1
V
IH2
V
IL2
Condition
--
V
1
=V
DD
/0V
I
OL
=2.5mA
I
OH
=
-400A
I
OL
=2.5mA
V
1
=V
DD
/0V
Input
frequency 1 MHz
V
DD
=2 to 5.5V
Min.
2.2
--
2.4
--
4/5 V
DD
--
Typ.
--
5
--
Max.
--
0.8
1/-1
10/-10
0.4
--
0.4
10
--
1/5 V
DD
Unit
V
A
V
A
pF
V
Applicable
terminal
All inputs
other than
CS
1
Input other
than D
0
to D
3
D
0
to D
3
STD.P
CS
1
-10 to +70C
(25C reference temperature)
-40 to +85C
(25C reference temperature)
V
DD
=5V, Ta=25C,
first year
Actual size
64
Real time clock module
CS
1
CS
0
or WR not occurred
CS
1
1/5V
DD
V
DD
4V
4V
V
IH
2
V
IH
2
V
IL
2
V
IL
2
t
CDR
t
R
2 to 4V
Data storage mode
Interface possible
with external
terminals
Interface possible
with external
terminals
Data holding timing
Register table
32.768 kHz
WR
RD
D
3
D
2
D
1
D
0
A
3
A
2
A
1
A
0
CS
0
ALE
CS
1
OCS
G
A
T
E
G
A
T
E
G
A
T
E
&
L
A
T
C
H
D
E
C
O
D
E
R
S
I
to C
F
COUNTER
1 Hz
RESET
bit
STOP
bit
HOLD
bit
BUSY
bit
64Hz
STD.P
1 sec carry
1 minute carry
1 hour carry
30s.ADJ
bit
30s.ADJ bit
24 / 12 bit
S
1
S
10
D
1
D
10
M
10
H
1
H
10
Y
1
Y
10
W
M
1
MO
10
MO
1
C
D
C
E
C
F
V
DD
Switching characteristics
Read mode
Write mode
V
IH2
V
IH2
V
IH
1
V
IH
1
V
IH
1
V
IH
1
V
IL
1
V
IL
1
V
IL
1
V
IL
1
V
IH
1
V
IH
1
V
IH
1
V
IH
1
V
IL
1
V
IH
1
V
IL
1
CS
0
ALE
WR
A
3
to A
0
D
3
to D
0
(Input )
t
C1H
t
CIS
t
AS
t
RCV
t
AH
t
AW
t
WAL
t
ALW
t
WW
t
DS
t
DH
CS
1
V
IH2
V
IH2
V
IH
1
V
IL
1
V
IH
1
V
IL
1
V
IL
1
V
IH
1
V
IH
1
V
OH
V
OL
V
IH
1
V
IH
1
V
IL
1
CS
0
ALE
RD
A
3
to A
0
D
3
to D
0
(output )
t
CIH
t
C1S
t
AS
t
RCV
t
RD
t
DR
t
AH
t
ALR
CS
1
"Z"
Block diagram
Supplement
0="L" level. 1="H" level
Note: Do not enter erroneous data for clock. This may result in time keeping error.
( V
DD
= 5V
0.5V, Ta = -40 to + 85C )
( ALE = While in use)
t
AW
t
RAL
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
A
3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A
2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Name of
register
S
1
S
10
MI
1
MI
10
H
1
H
10
D
1
D
10
MO
1
MO
10
Y
1
Y
10
W
C
D
C
E
C
F
D
3
s
8
mi
8
h
8
d
8
mo
8
y
8
y
80
30 sec.
ADJ
t
1
TEST
D
2
s
4
s
40
mi
4
mi
40
h
4
PM/AM
d
4
mo
4
y
4
y
40
w
4
IRQ
FLAG
t
0
24/12
D
1
s
2
s
20
mi
2
mi
20
h
2
h
20
d
2
d
20
mo
2
y
2
y
20
w
2
BUSY
ITRPT
/STND
STOP
D
0
s
1
s
10
mi
1
mi
10
h
1
H
10
d
1
d
10
mo
1
mo
10
y
1
y
10
w
1
HOLD
MASK
RESET
Count
0 to 9
0 to 5
0 to 9
0 to 5
0 to 9
0 to 2
or
0 to 1
0 to 9
0 to 3
0 to 9
0 to 1
0 to 9
0 to 6
Note
1 - sec. digit register
10 - sec. digit register
1 - min. digit register
10 - min. digit register
1 - hour digit register
10 - hour digit register
1 - day digit register
10 - day digit register
1 - month digit register
10 - month digit register
1 - year digit register
10 - year digit register
Week register
Control register D
Control register E
Control register F
1
0
PM/AM
PM
AM
24/12
24
12
ITRPT/STND
ITRPT
STND
Bit name
mark
BUSY
IRQ FLAG
24H/12H
TEST
Description
Writable. Recognized as 0 while in read mode.
Read only (effective only when HOLD=1)
Enter "0" only when clearing interruption. Enter "1" otherwise.
Set able only when RESET=1
For our company's testing. TEST should be "0" in normal use.
Item
CS
1
setup time
CS
1
hold time
Address setup time
Address hold time
ALE pulse width
ALE before WRITE
ALE before READ
ALE after WRITE
ALE after READ
WRITE pulse width
RD
__
to data
DATA hold
DATA setup time
DATA hold time
RD
__
/WR
___
recovery time
Symbol
t
CIS
t
CIH
t
AS
t
AH
t
AW
t
ALW
t
ALR
t
WAL
t
RAL
t
WW
t
RD
t
DR
t
DS
t
DH
t
RCV
Condition
--
C
L
=150pF
--
Min.
1000
1000
25
25
40
10
10
20
10
120
0
100
10
60
Max.
--
120
45
--
Unit
ns
Address
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