Real time clock module
4-bit REAL TIME CLOCK MODULE
RTC-62421 62423
/
Product number (please contact us)
RTC-62421
RTC-62423
: Q42624211xxxx00
: Q42624231xxxx00
•Built-in crystal unit allows adjustment-free efficient operation.
•24 h /12 h changeable and leap year automatically adjustable
(Gregorian calendar).
•Pins and functions are compatible with the MSM6242 series.
•Complies with EU RoHS directive.
RTC-62421
RTC-62423
Actual size
Refer to application manual for details.
http://www.epsondevice.com
■
Block diagram
OSC
Counter
D
D3
BUSY
bit
RESET
bit
STOP
bit
HOLD
bit
D2
Gate
Gate
24/12
bit
D1
0
30 sec ADJ
bit
W
S1
S10
D10
MI1 MI10
H1
Y1
H10
WR
RD
S1 to CF
A3
A
A2
MO10
MO1
D1
Y10
Latch
A1
0
CS0
Decoder
Output
DD
V
Selector
ALE
CS1
STD.P
64 Hz
1
1
1
Second carry
Minute carry
Hour carry
CD
CE
CF
■
■
Specifications (characteristics)
Absolute Max. rating
■
DC characteristics
Item
Symbol
V
Condition
Min.
-0.3
Max.
Unit
Item
Symbol
Condition
Min. Typ.
Max.
30
Unit Applicable terminal
µA
Supply voltage
Input voltage
Storage
T
=+25 °C
+7.0
DD+0.3
+85
I
V
=5 V
15
VDI/OD
Ta
a=+25 °C
GND-0.3
-55
V
IDDDD21
VDDDD=2 V
1
1.8
Current consumption
V
CS
1
= 0 V
RTC-62421
RTC-62423
“H” input voltage (1)
“L” input voltage (1)
“L” output voltage (1)
V
IH1
IL1
2.2
All inputs other than
V
TSTG
°C
temperature *
CS
1
-55
+125
V
0.8
0.4
*Stored as bare product after unpacking
V
OL1
I
OL=2.5 mA
OH=-400 µA
OL=2.5 mA
=VDD/0 V
Input frequency 1 MHz
D0 to D3
V
“H” output voltage
V
OH
I
2.4
■
Operating range
Item
Symbol
Condition
Min.
4.5
Max.
5.5
Unit
V
“L” output voltage (2)
OFF leak current
Input capacity
V
OL2
I
0.4
STD.P
Power voltage
Clock voltage
Operating
V
DD
I
OFFLK
V
1
10/-10 µA
pF
V
CLK
2.0
5.5
C
1
5
Input Pins
Stored as bare product
after unpacking
TOPR
-40
+85
°C
“H” input voltage (2)
V
IH2
4/5 VDD
temperature
V
DD=2.0 V to 5.5 V
V
CS1
“L” input voltage (2)
V
IL2
1/5 VDD
■Frequency characteristics
Input other than
Item
Symbol
Condition
Range
Unit
Input leak current (1)
Input leak current (2)
I
LK1
1/-1
µA
10/-10
V1=VDD/0 V
D
to D
62421A
±10
±50
±20
±50
ILK2
D0
0
to D3
3
62421B
62423A
62423
Frequency
precision
T =+25 °C
VaDD=5.0 V
∆f /f
×10-6
Frequency
temperature
characteristics
-10 °C to +70 °C (+25 °C)
-40 °C to +85 °C(+25 °C)
=+25 °C,VDD=4.5 V to 5.5 V
+10 / -120
+10 / -220
±5.0 Max.
TOP
Frequency voltage
characteristics
f/V
fa
T
a
×10-6/V
Aging
Ta
=+25 °C,VDD=5.0 V,First year
±5.0 Max. ×10-6/year
■
Terminal connection/External dimensions
(Unit:mm)
RTC-62421 (DIP 18-pin)
RTC-62423 (SOP 24-pin)
No.
Pin
terminal
No.
Pin
No.
Pin
No.
Pin
terminal
terminal
terminal
23.1 Max.
116.3 MMaaxx..
1
2
STD.P
/CS0
N.C.
ALE
A0
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1
2
3
4
5
6
7
8
9
STD.P
/CS0
ALE
A0
18
17
16
15
14
13
12
11
10
VDD
(VDD
(VDD
CS1
C0
(VDD
(VDD
N.C.
CS1
)
)
#18
#10
#
2
4
#113
)
)
3
RTC62421 A
4
5
A1
RTC6622442233
EPSSOONN 11223344AA
EPSON 1234A
6
N.C.
A1
D
0
A
2
A3
D
1
7
N.C.
#1
#9
D2
8
N.C.
N.C.
/RD
GND
D3
9
A
2
A3
D
1
D2
/WR
10
11
12
#
1
#112
/RD
GND
D3
/WR
7.62
0.2
4.2
00.2
Min.
Max.
2.8 MMaaxx..
1.52
0.46
3.3
0
.
1
M
°
°°
10
0
-
Min.
1.0
0.35
2.54
1.27
0.25
°
°
0
-15
Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.
73