參數(shù)資料
型號: EM78P451
英文描述: Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述: 8位微控制器的通用產(chǎn)品[英文]
文件頁數(shù): 35/52頁
文件大?。?/td> 1287K
代理商: EM78P451
EM78P451
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
40
and C2. Since each resonator has its own attribute, user should refer to its specification for
appropriate values of C1 and C2. RS, a serial resistor may be necessary for AT strip cut crystal or low
frequency mode.
OSCI
OSCO
EM78P451
Ext. Clock
Fig. 18 Circuit for External Clock Input
OSCI
OSCO
EM78P451
C1
C2
XTAL
RS
Fig. 19 Circuit for Crystal/Resonator
Table 10 Capacitor Selection Guide for Crystal Oscillator Ceramic Resonators
Oscillator Type
Frequency Mode
Frequency
C1 (pF)
C2 (pF)
455 KHz
10~150
1.0 MHz
40~80
2.0 MHz
20~40
Ceramic Resonator
HXT
4.0 MHz
10~30
32.768 KHz
25
15
100 KHz
25
LXT
200 KHz
25
455 KHz
20~40
20~150
1.0 MHz
15~30
2.0 MHz
15
Crystal Oscillator
HXT
4.0 MHz
15
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