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參數(shù)資料
| 型號： | DS1339C-2 |
| 英文描述： | I2C Serial Real-Time Clock |
| 中文描述： | I2C串行實時時鐘 |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 279K |
| 代理商： | DS1339C-2 |
DS1339 I
2
C Serial Real-Time Clock
7 of 18
PIN DESCRIPTION
PIN
SOP
SO
NAME
FUNCTION
1
—
X1
2
—
X2
Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator
circuitry is designed for operation with a crystal having a specified load
capacitance (C
L
) of 6pF. An external 32.768kHz oscillator can also drive the
DS1339. In this configuration, the X1 pin is connected to the external oscillator
signal and the X2 pin is floated.
For more information about crystal selection and crystal layout considerations,
refer to
Application Note 58: Crystal Considerations with Dallas Real-Time
Clocks
.
Secondary Power Supply. Supply voltage must be held between 1.3V and 3.7V
for proper operation. This pin can be connected to a primary cell, such as a
lithium button cell. Additionally, this pin can be connected to a rechargeable cell
or a super cap when used in conjunction with the trickle-charge feature. Diodes
should not be placed in series between the battery and the V
BACKUP
input, or
improper operation will result. UL recognized to ensure against reverse charging
current when used with a lithium battery If a back up supply is not required,
V
BACKUP
must be grounded.
Ground. DC power is provided to the device on these pins.
Serial Data Input/Output. SDA is the input/output pin for the I
2
C serial interface.
The SDA pin is an open-drain output and requires an external pullup resistor.
Serial Clock Input. SCL is used to synchronize data movement on the serial
interface.
Square-Wave/Interrupt Output. Programmable square-wave or interrupt output
signal. The SQW/
INT
pin is an open-drain output and requires an external pullup
resistor.
Power Supply. DC power is provided to the device on these pins.
3
14
V
BACKUP
4
15
GND
5
16
SDA
6
1
SCL
7
2
SQW/
INT
8
3
V
CC
N.C.
—
4–13
No Connection. These pins are unused and must be connected to ground.
TYPICAL OPERATING CIRCUIT
DS1339
4
CPU
VCC
VCC
VCC
5
6
8
1
2
SDA
SCL
GND
X2
X1
VCC
RPU
RPU
CRYSTAL
SQW/INT
V
BACKUP
3
7
i
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1339C-2- | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock |
| DS1339C-2# | 功能描述:實時時鐘 I2C Serial RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1339C-2+ | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 16SOIC W - Bulk |
| DS1339C-3 | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1339C-3- | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock |
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