概述
数据手册RTC-72421A 概述
0 TIMER(S), REAL TIME CLOCK, PDIP18, DIP-18
RTC-72421A 数据手册
通过下载RTC-72421A数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载Real time clock module
Product Number (Please contact us)
RTC-72421A : Q42724212000100
RTC-72421B : Q42724212000200
RTC-72423A : Q42724232000600
RTC-72423B : Q42724232000700
REAL TIME CLOCK MODULE (4-bit)
RTC-72421
RTC-72423
•Built-in crystal unit allows adjustment-free efficient operation.
•24 h /12 h changeable and leap year automatically adjustable
(Gregorian calendar).
Actual size
RTC-72421
Note
RTC-72423
•7242series does not have complete compatibility ability for
the "old product RTC-6242 series”.
•when replace to 7242series from 6242 series, confirm the technical
information of RTC7242 latest manual by all means.
Block diagram
RTC-72421/72423
OSC
Counter
D3
D2
D1
D0
RESET STOP
bit bit
HOLD BUSY
Gate
Gate
bit
bit
24/12
bit
30 sec ADJ
bit
S1
S10
D10
MI1 MI10
H1
Y1
H10
Y10
W
W R
RD
S1 to
CF
A3
A2
D1
MO1 MO10
Decoder
A1
Latch
A0
CS0
Output
Selector
ALE
CS1
STD.P
64 Hz
1
1
Second carry
Minute carry
CD
CE
CF
1
Hour carry
Terminal connection/External dimensions
(Unit:mm)
RTC-72421 (DIP 18-pin)
RTC-72423 (SOP 24-pin)
No.
Pin
terminal
STD.P
/CS
ALE
No.
Pin
terminal
VDD
(VDD
(VDD
No.
Pin
terminal
STD.P
/CS
N.C.
ALE
No.
Pin
terminal
VDD
16.3 Max.
23.1 Max.
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
#24
#13
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
#18
#10
0
)
)
0
(VDD
(VDD
N.C.
)
)
RTC72421 A
A
A
A
A
0
1
2
3
CS1
RTC72423
EPSON 1234A
C
D
D
D
0
1
2
3
A
0
CS1
D0
N.C.
N.C.
N.C.
A1
N.C.
EPSON 1234A
#1
#9
/RD
GND
/WR
A
A
2
D
D
D
1
2
3
#1
#12
10
11
12
3
/RD
GND
7.62
/WR
0.2
Min.
4.2
0.2
2.8 Max.
0.1 Min.
Max.
1.52
0.46
3.3
Min.
0° - 10°
1.0
0.35
1.27
2.54
0.25
0° -15°
The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
Specifications (characteristics)
*Refer to application manual for details.
Absolute Max. rating
DC characteristics
Item
Supply voltage
Symbol
Conditions
Min.
-0.3
Max.
+7.0
Unit
Item
Symbol
Conditions
Min.
Typ.
1
Max. Unit Applicable terminal
10
CS1= 0 V
VDD
I
DD1
VDD=5 V
T
a=+25 °C
V
Current consumption
Exclude input/
output current
µA
Input voltage
VI/O
GND-0.3
V
DD+0.3
I
DD2
VDD=2 V
0.9
5
T
a=+25 °C
RTC-72421
RTC-72423
-55
-55
+85
HIGH input voltage (1)
LOW input voltage (1)
LOW output voltage (1)
V
IH1
IL1
OL1
OH
2.2
Storage
temperature *
All inputs other than
V
T
STG
°C
CS1
+125
V
0.8
0.4
V
I
OL=2.5 mA
OH=-400 µA
OL=2.5 mA
=VDD/0 V
*Stored as bare product after unpacking
D0 to D3
HIGH output voltage
V
I
2.4
V
Operating range
Item
Power voltage
LOW output voltage (2)
OFF leak current
VOL2
I
0.4
Symbol
V
Conditions
Min.
4.5
Max.
5.5
Unit
V
STD.P
DD
I
OFFLK
V
1
10/-10
µA
Input other than
Clock voltage
V
CLK
2.0
5.5
10
20
Input frequency
1 MHz
D0
to D
3
Input capacity
C
1
pF
RTC-72421
RTC-72423
-10
-40
+70
+85
D0
to D , STD.P
3
Operating
temperature
T
OPR
°C
HIGH input voltage (2)
LOW input voltage (2)
VIH2
4/5 VDD
V
DD=2.0 V to 5.5 V
V
CS1
V
IL2
1/5 VDD
1/-1
Stored as bare produc after unpacking
Input other than
Input leak current (1)
Input leak current (2)
I
I
LK1
µA
Frequency characteristics
D0
0
to D
3
3
V1=VDD/0 V
LK2
10/-10
D
to D
Item
Symbol
Conditions
Range
±10
Unit
72421A
72421B
72423A
72423B
±50
Frequency
precision
T
V
a
=+25 °C
DD=5.0 V
∆f /f
±20
×10-6
±50
Frequency
temperature
characteristics
Frequency voltage
characteristics
+10 / -120
+10 / -220
-10 °C to +70 °C (+25 °C)
TOP
-40 °C to +85 °C(+25 °C)
=+25 °C,VDD=2.0 V to 5.5 V ±5.0 Max. ×10-6/V
a
=+25 °C,VDD=5.0 V,First year ±5.0 Max. ×10-6/year
f/V
fa
T
a
Aging
T
PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM
CONFORMING TO INTERNATIONAL STANDARDS
At Seiko Epson, all environmental initiatives operate under the
Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous
ISO 14000 is an international standard for environmental
improvements. The environmental management system (EMS)
operates under the ISO 14001 environmental management standard.
All of our major manufacturing and non-manufacturing sites, in
Japan and overseas, completed the acquisition of ISO 14001
certification.
management that was established by the International
Standards Organization in 1996 against the background of
growing concern regarding global warming, destruction of
the ozone layer, and global deforestation.
WORKING FOR HIGH QUALITY
In order provide high quality and reliable products and services
than meet customer needs,
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
Seiko Epson made early efforts towards obtaining ISO9000 series
certification and has acquired ISO9001 for all business
establishments in Japan and abroad. We have also acquired ISO/TS
16949 certification that is requested strongly by major automotive
manufacturers as standard.
►Explanation of the mark that are using it for the catalog
►Pb free.
►Complies with EU RoHS directive.
*About the products without the Pb-free mark.
Contains Pb in products exempted by EU RoHS directive.
(Contains Pb in sealing glass, high melting temperature type solder or other.)
►Designed for automotive applications such as Car Multimedia, Body Electronics, Remote Keyless Entry etc.
►Designed for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ).
Notice
•
•
•
This material is subject to change without notice.
Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson.
The information about applied data, circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson
does not assume any liability for the occurrence of customer damage or infringing on any patent or copyright of a third party. This
material does not authorize the licensing for any patent or intellectual copyrights.
•
•
When exporting the products or technology described in this material, you should comply with the applicable export control laws and
regulations and follow the procedures required by such laws and regulations.
You are requested not to use the products (and any technical information furnished, if any) for the development and/or manufacture of
weapon of mass destruction or for other military purposes. You are also requested that you would not make the products available to
any third party who may use the products for such prohibited purposes.
•
These products are intended for general use in electronic equipment. When using them in specific applications that require extremely
high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance.
/ Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains,
vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment
and security equipment / traffic control equipment / and others requiring equivalent reliability.
•
All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective.
Seiko Epson Corporation
RTC-72421A 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| RTC-72421B | ETC | Real-Time Clock | 获取价格 |
|
| RTC-72421BS:ROHS | SEIKO | IC,REAL-TIME CLOCK,DIP,18PIN,PLASTIC | 获取价格 |
|
| RTC-72423 | EPSON | Real time clock module(4-bit REAL TIME CLOCK MODULE) | 获取价格 |
|
| RTC-72423 | EPSONTOYOCOM | 4-bit REAL TIME CLOCK MODULE | 获取价格 |
|
| RTC-72423:A-0 | SEIKO | REAL TIME CLOCK | 获取价格 |
|
| RTC-72423:A-3 | SEIKO | REAL TIME CLOCK | 获取价格 |
|
| RTC-72423:B-0 | SEIKO | REAL TIME CLOCK | 获取价格 |
|
| RTC-72423:B-3 | SEIKO | REAL TIME CLOCK | 获取价格 |
|
| RTC-72423A | ETC | Real-Time Clock | 获取价格 |
|
| RTC-72423A-0 | SEIKO | 0 TIMER(S), REAL TIME CLOCK, PDSO24, SOP-24 | 获取价格 |
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