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器件3D模型￥ 46.741
RTC-72421B 产品手册 - Epson Electronics（爱普生）
制造商:
Epson Electronics（爱普生）
分类:
实时时钟芯片
封装:
DIP-18
描述:
Epson### 实时时钟 (RTC)
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
封装尺寸在P1
技术参数、封装参数在P1
电气规格在P1
导航目录
RTC-72421B数据手册
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94
Specifications (characteristics)
Absolute Max. rating
Operating range
Frequency characteristics
DC characteristics
External dimensions
Terminal connection
RTC-72421
(Unit: mm)
23.1 Max.
3.3 Min. 0.2 Min.
6.3
4.2
#1
#18
#9
#10
RTC72421 A
EPSON 1234A
RTC72423 A
EPSON 1234A
(VDD) and VDD are to have the same level of voltage. Do not connect it to any external terminals.
NC is not connected internally.
#1
#24
#12
#13
RTC-72421
RTC-72423
RTC-72423
0.1 Min.
2.8 Max.
7.62
0.25
16.3 Max.
7.9
12.2 Max.
0.2
1.0
90° to 105°
0° to 10°
1.27 0.35
2.54 0.65 Max.
(DIP 18-pin)
(SOP 24-pin)
No.
1
2
3
4
5
6
7
8
9
Pin terminal
STD. P
CS
0
ALE
A
0
A1
A2
A3
RD
GND
No.
18
17
16
15
14
13
12
11
10
Pin terminal
VDD
(
V
DD
)
(
V
DD
)
CS
1
D0
D1
D2
D3
WR
No.
1
2
3
4
5
6
7
8
9
10
11
12
Pin terminal
STD. P
CS
0
NC
ALE
A
0
NC
A
1
NC
A
2
A3
RD
GND
No.
24
23
22
21
20
19
18
17
16
15
14
13
Pin terminal
VDD
(
V
DD
)
(
V
DD
)
NC
CS1
D0
NC
NC
D1
D2
D3
WR
Item
Frequency tolerance
Frequency temperature
characteristics
Frequency voltage
characteristics
Aging
Item
Current consumption
“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
∆f/fo
T
OP
f/V
fa
Symbol
IDD1
IDD2
VIH1
VIL1
ILK1
ILK2
VOL1
VOH
VOL2
IOFFLK
C1
VIH2
VIL2
Min.
—
2.2
—
2.4
—
4/5 VDD
—
Typ.
1
0.9
—
10
20
—
Max.
10
5
—
0.8
±1
±10
0.4
—
0.4
10
—
1/5 VDD
Unit
µA
V
µA
V
µA
pF
V
D0 to D3
STD.P
D0 to D3
CS1
Input other
than D
0 to D3
Input other
than D
0 to D3
All inputs
other than
CS
1
Applicable
terminal
Condition
—
V
1=VDD/0 V
I
OL=2.5 mA
IOH=-400 µA
IOL=2.5 mA
V1=VDD/0 V
Input
frequency 1 MHz
VDD=2 to 5.5 V
Condition Range
±10
±50
±20
±50
+10/-120
+10/-220
±5 Max.
±5 Max.
Unit
x 10
-6
x 10
-6
/V
x 10
-6
/year
-10 °C to +70 °C
(Reference at +25 °C)
-40 °C to +85 °C
(Reference at +25 °C)
Ta=+25 °C
VDD=2.0 V to 5.5 V
VDD=5 V, Ta=+25 °C, first year
72421 A
72421 B
72423 A
72423
Ta=+25 °C
VDD=5 V
CS1=0 V
Exclude input/
output current
VDD=5 V
VDD=2 V
—
4-bit REAL TIME CLOCK MODULE
RTC-72421/72423
• Built-in crystal unit allows adjustment-free efficient operation.
• 12/24 h clock switchover function and automatic leap year setting.
• Interrupt masking.
Item
Supply voltage
Input and output voltage
Storage temperature
∗
Symbol
V
DD
VI/O
TSTG
Condition
Ta=+25 °C
Ta=+25 °C
RTC-72421
RTC-72423
Min. Max.
-0.3 7.0
GND -0.3 V
DD+0.3
-55 +85
-55 +125
Unit
V
°C
Item
Power voltage
Supply voltage
Operating temperature
∗
Symbol
V
DD
VCLK
TOPR
Condition
—
—
RTC-72421
RTC-72423
Min. Max.
4.5 5.5
2.0 5.5
-10 70
-40 85
Unit
V
V
°C
Actual size
The details are mentioned in the application manual.
http://www.epsondevice.com
Product number (please refer to page 2)
Q4272421xxxxx00
Q4272423xxxxx00
Real time clock module
∗Stored as bare product after unpacking
∗
No condensation
RTC-72423RTC-72421
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