欢迎访问ic37.com |
会员登录 免费注册
发布采购

PT2272-M2S 参数 Datasheet PDF下载

PT2272-M2S图片预览
型号: PT2272-M2S
PDF下载: 下载PDF文件 查看货源
内容描述: 遥控解码 [Remote Control Decoder]
分类和应用: 遥控
文件页数/大小: 22 页 / 539 K
品牌: PTC [ PRINCETON TECHNOLOGY CORP ]
 浏览型号PT2272-M2S的Datasheet PDF文件第4页浏览型号PT2272-M2S的Datasheet PDF文件第5页浏览型号PT2272-M2S的Datasheet PDF文件第6页浏览型号PT2272-M2S的Datasheet PDF文件第7页浏览型号PT2272-M2S的Datasheet PDF文件第9页浏览型号PT2272-M2S的Datasheet PDF文件第10页浏览型号PT2272-M2S的Datasheet PDF文件第11页浏览型号PT2272-M2S的Datasheet PDF文件第12页  
Tel: 886-2-66296288  
Fax: 886-2-29174598  
URL: http://www.princeton.com.tw  
Remote Control Decoder  
PT2272  
SINGLE RESISTOR OSCILLATOR  
The built-in oscillator circuitry of PT2272 allows a precision oscillator to be constructed with only an  
external resistor. For the PT2272 to decode correctly the waveform that was received, the oscillator  
frequency of PT2272 must be 2.5~8 times that of the transmitting PT2262. It is a good practice to  
center the PT2272 oscillator frequency in this window to gain best window margin at both sides. The  
typical oscillator with various resistor values is shown below for both PT2262 and PT2272.  
Encoder OSC Frequency  
Decoder OSC Frequency  
KHz  
100  
KHz  
1000  
R = 510 K  
R = 1 M  
R = 2 M  
R = 100 K  
R = 240 K  
R = 510 K  
R = 1 M  
100  
10  
R = 3.3 M  
R = 4.7 M  
10  
1
R = 2 M  
3
6
9
12  
15  
3
6
9
12  
15  
V O L T A G E  
V O L T A G E  
Suggested oscillator resistor values are shown below.  
PT2262  
4.7M  
3.3MΩ  
1.2MΩ  
PT2272  
820K*  
680K*  
200K**  
Note:  
* -- Operates when PT2272's VCC=5V to 15V  
** -- Operates when PT2272's VCC= 4V to 15V  
This means that if the PT2272 supply voltage is lower than 5V, you have to use a lower oscillator  
resistor value for both PT2262 and PT2272.  
PT2272 V3.7  
- 8 -  
June, 2008