RTC72421 EPSON Electronics, RTC72421 Datasheet
RTC72421
Manufacturer Part Number
RTC72421
Description
Manufacturer
EPSON Electronics
Datasheet
1.RTC72421.pdf
(1 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RTC72421
Manufacturer:
MAXIM
Quantity:
5 510
Part Number:
RTC72421
Manufacturer:
EPSON/爱普生
Quantity:
20 000
Company:
Part Number:
RTC72421A
Manufacturer:
EPSON
Quantity:
5 510
Part Number:
RTC72421A
Manufacturer:
EPSON/爱普生
Quantity:
20 000
Company:
Part Number:
RTC72421A/B
Manufacturer:
EPSON
Quantity:
5 510
Company:
Part Number:
RTC72421A/B
Manufacturer:
SEM
Quantity:
5 510
Part Number:
RTC72421B
Manufacturer:
EPSON/爱普生
Quantity:
20 000
*Stored as bare product after unpacking
Operating range
Stored as bare produc after unpacking
Frequency characteristics
Absolute Max. rating
Frequency voltage
Supply voltage
Power voltage
temperature *
Clock voltage
Input voltage
temperature
characteristics
characteristics
4-bit REAL TIME CLOCK MODULE
RTC - 72421
RTC - 72423
Frequency
Operating
temperature
precision
Frequency
Storage
Block diagram
Terminal connection/External dimensions
Specifications (characteristics)
Built-in crystal unit allows adjustment-free efficient operation.
24 h /12 h changeable and leap year automatically adjustable
(Gregorian calendar).
Aging
Item
Item
Item
Real time clock module
Real time clock module
Real time clock module
Real time clock module
Symbol
Symbol
Symbol
RTC-72421 (DIP 18-pin)
V
T
TOP
T
V
V
V
f/V
fa
STG
OPR
CLK
f /f
DD
I/O
DD
1.52
0.46
T
V
T
a
T
DD
a
#18
=+25 °C
RTC-72421
RTC-72423
RTC-72421
RTC-72423
a
=+25 C,V
T
T
#1
Condition
Condition
-10 C to +70 C (+25 C)
=+25 C,V
-40 C to +85 C(+25 C)
=5.0 V
a
a
=+25 C
=+25 C
-
-
RTC72421 A
EPSON
Condition
23.1 Max.
DD
DD
=5.0 V,First year
=2.0 V to 5.5 V
CS 0
AL E
CS 1
GND-0.3
72421A
72421B
72423A
W R
1234A
D3
D2
D1
D0
R D
A3
A2
A1
A0
72423
2.54
Min.
Min.
-0.3
-55
-55
4.5
2.0
-10
-40
#10
#9
Min.
0.2
V
+10 / -120
+10 / -220
DD
+125
Max.
Max.
4.2
Max.
+7.0
3.3
+85
+70
+85
5.5
5.5
5.0 Max.
5.0 Max. 10
La tc h
Min.
Ga te
Ga te
Range
+0.3
10
50
20
50
No.
1
2
3
4
5
6
7
8
9
http://www.epsontoyocom.co.jp
0 -15
Decoder
Pin
STD.P
/CS
ALE
A
A
A
A
/RD
GND
OS C
terminal
0
1
2
3
30 s ec A DJ
10
0
7.62
Unit
Unit
Unit
10
-6
V
V
C
C
-6
/year
S1 to
CF
-6
/V
R E SE T
b it
0.25
bit
No.
18
17
16
15
14
13
12
11
10
Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.
DC characteristics
S TO P
LOW output voltage (1)
LOW output voltage (2)
HIGH input voltage (1)
HIGH input voltage (2)
b it
LOW input voltage (1)
LOW input voltage (2)
Current consumption
Input leak current (1)
Input leak current (2)
HIGH output voltage
OFF leak current
Pin
V
(V
(V
CS
C
D
D
D
/W R
S 1
D1
C D
Cou nter
terminal
DD
0
1
2
3
Input capacity
D D
D D
1
)
)
D 10
S 10
Item
CE
HOL D
Actual size
RTC-72421
b it
M O1 MO 10
M I1
B U SY
b it
M I1 0
RTC-72423 (SOP 24-pin)
CF
#1
#1
#24
#24
1 S ec o nd ca rry
Symbol
EPSON 1234A
EPSON 1234A
1 M in ute c arry
RTC62423
RTC72423
I
V
V
OFFLK
1 H ou r c arry
1.27
I
I
V
V
V
V
V
I
I
DD1
DD2
C
LK1
LK2
RTC -72421/72423
OL1
OL2
IH1
OH
IH2
IL1
IL2
1
H1
Y1
16.3 Max.
16.3 Max.
64 Hz
24 /1 2
H 10
Y10
b it
Exclude input/
output current V
0.35
CS
V
O utp ut
S e lec to r
Input frequency
DD
1
I
= 0 V
V
=2.0 V to 5.5 V
V
I
OH
I
#13
#13
OL
OL
Condition
#12
#12
W
1
1
=V
=V
=-400 µA
1 MHz
RTC-72423
=2.5 mA
=2.5 mA
-
DD
DD
0.1 Min.
0.1 Min.
/0 V
/0 V
2.8 Max.
2.8 Max.
V
DD
DD
*Refer to application manual for details.
=5 V
=2 V
No.
10
11
12
1
2
3
4
5
6
7
8
9
0.2
0.2
4/5 V
S TD.P
1.0
Min.
-
2.2
-
-
2.4
-
-
-
Pin
STD.P
/CS
N.C.
ALE
A
N.C.
A1
N.C.
A
A
/RD
GND
terminal
0
2
3
DD
0
Epson Toyocom
Epson Toyocom
Epson Toyocom
Epson Toyocom
Typ.
0.9
-
-
10
20
1
0 - 10
0 - 10
No.
24
23
22
21
20
19
18
17
16
15
14
13
1/5 V
10/-10
10/-10
Max.
1/-1
-
0.8
0.4
-
0.4
-
10
5
Pin
V
(V
(V
N.C.
CS
D
N.C.
N.C.
D
D
D
/WR
terminal
DD
0
1
2
3
DD
DD
DD
1
)
)
Unit Applicable terminal
pF
V
V
V
A
A
A
All inputs other than
Input other than
D
Input other than
0
(Unit:mm)
to D
D
D
D
D
STD.P
0
0
0
0
CS
CS
-
-
to D
to D
to D
to D
3
, STD.P
1
1
3
3
3
3
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