參數(shù)資料
型號： RTC72421A
英文描述： 4-bit REAL TIME CLOCK MODULE(71.62 k)
中文描述： 4位實時時鐘模塊（71.62十一）
文件頁數(shù)： 1/2頁
文件大?。?/td> 71K
代理商： RTC72421A
65
Real time clock module
Specifications (characteristics)
Absolute Max. rating
Symbol
Operating range
Item
Operating voltage
Frequency characteristics and current consumption
characteristics
Symbol
Condition
Electrical characteristics
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
External dimensions
RTC-72421
Terminal connection
RTC-72421
(Unit: mm)
23.1 max.
3
0
6
4
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
RTC72421 A
EPSON 5053C
RTC72423 A
EPSON 6150
(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-72423
RTC-72423
0.05 min.
2.8 max.
7.62
0.25
2
16.3 max.
7
1
0
1.0
0
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
72423
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
72421
90
°
to
105
°
0
°
to
10
°
4-bit REAL TIME CLOCK MODULE
RTC-72421
/
72423
Builtin crystal unit allows adjustment-free efficient operation.
ALE input terminal available for 8048, 8051, and 8085 series.
12/24H clock switchover function and automatic leap year setting.
Interrupt masking.
30 second adjustment function.
Low current consumption and features a backup function.
Item
Power source voltage
Input and output voltage
Storage temperature
Soldering condition
V
DD
V
I/O
T
STG
T
SOL
Condition
Ta=25C
Ta=25C
RTC-72421
RTC-72423
RTC-72421
RTC-72423
Specifications
-0.3 to 7.0
GND -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
Unit
V
C
Operating temperature
Data holding voltage
CSI data holding time
Operation restoring time
Symbol
V
DD
T
OPR
V
DH
t
CDR
t
R
Condition
RTC-72421
RTC-72423
Refer to the data
holding timing
Specifications
4.5 to 5.5
-10 to 70
-40 to 85
2.0 to 5.5
2.0 min.
Unit
V
C
V
μs
Item
Frequency tolerance
Frequency temperature
characteristics
Aging
Shock resistance
Current consumption
f/fo
fa
S.R.
I
DD1
I
DD2
Ta=25C
V
DD
=5V
72421 A
72421 B
72423 A
72423
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
Exclude input/
output current
V
DD
=5V
V
DD
=2V
Specifications
±10
±50
±20
±50
+10/-120
±5 max.
±10 max.
10 max.
5 max.
Unit
ppm
ppm/Y
ppm
μA
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
=-400μA
I
OL
=2.5mA
V
1
=V
DD
/0V
frequency 1 MHz
V
DD
=2to5.5V
Min.
2.2
—
2.4
—
4/5 V
DD
—
Typ.
—
10
20
—
Max.
—
0.8
±1
±10
0.4
—
0.4
10
—
1/5 V
DD
Unit
V
μA
V
μA
pF
V
Applicable
terminal
All inputs
other than
CS
1
Input other
0
to D
3
D
0
to D
3
STD.P
Input other
0
to D
3
D
0
to D
3
CS
1
(25C reference temperature)
V
DD
=5V, Ta=25C,
Actual size
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RTC-72421A 功能描述:IC REAL TIME CLOCK 18-DIP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件
RTC72421AROHS 制造商:Epson Electronics America Inc 功能描述:Real Time Clock Parallel 18-Pin PDIP
RTC72421B 制造商:Epson Toyocom Corporation 功能描述:IC RTC 72421 DIP18 制造商:Epson Toyocom Corporation 功能描述:IC, RTC, 72421, DIP18 制造商:Epson Toyocom Corporation 功能描述:IC, RTC; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Digital IC Case Style:DIP; No. of Pins:18; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:18-DIP;RoHS Compliant: Yes
RTC-72421B 功能描述:IC REAL TIME CLOCK 18-DIP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件
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