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EM78P259NSO14J 参数 Datasheet PDF下载

EM78P259NSO14J图片预览
型号: EM78P259NSO14J
PDF下载: 下载PDF文件 查看货源
内容描述: [EM78Q153SN EM78P153SP EM78P153SN EM78156EH EM78156EP EM78156EM EM78156EKM EM78Q156ELP EM78Q156ELM EM78Q156ELKM EM78P156ELP EM78P156ELM EM78P156ELKM EM78P156NP EM78P156NM EM78447SH EM78447SAP EM78447SAM EM78447SAS EM78447SBP EM78447SBWM EM78Q447SH EM78Q447SAP EM78Q447SAM EM78Q447SBP EM78Q447SBWM EM78P447SAP EM78P447SAM EM78P447SAS EM78P447SBP EM78P447SBWM EM78Q257 EM78Q257AP EM78Q257AM EM78Q257BP EM78Q257BM EM78P257AP EM78P257AM EM78P257BP EM78P257BM EM78451H EM78451P EM78451AQ EM]
分类和应用:
文件页数/大小: 81 页 / 2574 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM78P258N  
8-Bit Microprocessor with OTP ROM  
In the most applications, Pin OSCI and Pin OSCO can be connected with a crystal or  
ceramic resonator to generate oscillation. Fig. 6-14 below depicts such circuit. The  
same applies to the HXT mode and the LXT mode.  
C1  
OSCI  
EM78P258N  
XTAL  
OSCO  
RS  
C2  
Fig. 6-14 Crystal/Resonator Circuit  
The following table provides the recommended values for C1 and C2. Since each  
resonator has its own attribute, you should refer to the resonator specifications for  
appropriate values of C1 and C2. RS, a serial resistor, may be required for AT strip cut  
crystal or low frequency mode.  
Capacitor selection guide for crystal oscillator or ceramic resonators:  
Oscillator Type  
Frequency Mode  
Frequency  
C1(pF)  
C2(pF)  
455 kHz  
2.0 MHz  
4.0 MHz  
32.768kHz  
100KHz  
200KHz  
455KHz  
1.0MHz  
2.0MHz  
4.0MHz  
100~150  
20~40  
10~30  
25  
100~150  
20~40  
10~30  
15  
Ceramic Resonators  
HXT  
LXT  
HXT  
25  
25  
25  
25  
Crystal Oscillator  
20~40  
15~30  
15  
20~150  
15~30  
15  
15  
15  
Circuit diagrams for serial and parallel modes Crystal/Resonator:  
330  
330  
C
OSCI  
7404  
7404  
7404  
EM78P258N  
XTAL  
Fig. 6-15 Serial Mode Crystal/Resonator Circuit Diagram  
Product Specification (V1.0) 06.16.2005  
57  
(This specification is subject to change without further notice)  
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