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參數(shù)資料
| 型號： | 1339-31DCGI8 |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, SOIC-8 |
| 文件頁數(shù)： | 20/26頁 |
| 文件大?。?/td> | 330K |
| 代理商： | 1339-31DCGI8 |
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IDT1339
REAL-TIME CLOCK WITH SERIAL I2C INTERFACE
RTC
IDT
REAL-TIME CLOCK WITH SERIAL I2C INTERFACE
3
IDT1339
REV N 060311
Typical Operating Circuit
Detailed Description
The following sections discuss in detail the Oscillator block,
Power Control block, Clock/Calendar Register, Alarms,
trickle Charger, and Serial I2C block.
Oscillator Block
Selection of the right crystal, correct load capacitance and
careful PCB layout are important for a stable crystal
oscillator. Due to the optimization for the lowest possible
current in the design for these oscillators, losses caused by
parasitic currents can have a significant impact on the
overall oscillator performance. Extra care needs to be taken
to maintain a certain quality and cleanliness of the PCB.
Crystal Selection
The key parameters when selecting a 32 kHz crystal to work
with IDT1339 RTC are:
Recommended Load Capacitance
Crystal Effective Series Resistance (ESR)
Frequency Tolerance
Effective Load Capacitance
Please see diagram below for effective load capacitance
calculation. The effective load capacitance (CL) should
match the recommended load capacitance of the crystal in
order for the crystal to oscillate at its specified parallel
resonant frequency with 0ppm frequency error.
In the above figure, X1 and X2 are the crystal pins of our
device. Cin1 and Cin2 are the internal capacitors which
include the X1 and X2 pin capacitance. Cex1 and Cex2 are
the external capacitors that are needed to tune the crystal
frequency. Ct1 and Ct2 are the PCB trace capacitances
between the crystal and the device pins. CS is the shunt
capacitance of the crystal (as specified in the crystal
manufacturer's datasheet or measured using a network
analyzer).
Note: IDT1339CSRI integrates a standard 32.768 kHz
(±20ppm) crystal in the package and contributes an
additional frequency error of 10ppm at nominal VCC (+3.3 V)
and TA=+25°C.
CPU
X1
X2
VCC
SQW/INT
VBACKUP
GND
SDA
SCL
CRYSTAL
IDT1339
+
-
VCC
RPU
2k
VCC
10k
RPU
2k
12
6
5
7
3
4
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 13715-806-XTD | 300 MHz, OTHER CLOCK GENERATOR, PDSO16 |
| 1374610-3 | INTERCONNECTION DEVICE |
| 1376137-1 | POWER CONNECTOR |
| 1380B-8 | BRASS, GOLD FINISH, PCB TERMINAL |
| 1390D-17 | BRASS, PCB TERMINAL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 1339-31DVGI | 功能描述:實時時鐘 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 |
| 1339-31DVGI8 | 功能描述:實時時鐘 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 |
| 133933 | 制造商:ERNI Electronics 功能描述:133933 / MODULAR JACK |
| 133934 | 制造商:ERNI Electronics 功能描述:Conn Telephone/Telecom F 8 POS 2.54mm Solder ST Thru-Hole 8 Terminal 1 Port Tray Cat 5 |
| 1339342-1 | 功能描述:集管和線殼 1 Pair Double Red Pivot Conn RoHS:否 產(chǎn)品種類:1.0MM Rectangular Connectors 產(chǎn)品類型:Headers - Pin Strip 系列:DF50 觸點類型:Pin (Male) 節(jié)距:1 mm 位置/觸點數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點材料:Brass 觸點電鍍:Gold 制造商:Hirose Connector |
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