参数资料
型号: EM78459
英文描述: Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
中文描述: 8位微控制器的通用产品
文件页数: 40/57页
文件大小: 854K
代理商: EM78459
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
45
Table 13 Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonators
Oscillator Type
Frequency Mode
Frequency
C1(pF)
C2(pF)
455 kHz
100~150
2.0 MHz
20~40
Ceramic
Resonators
HXT
4.0 MHz
10~30
32.768kHz
25
15
100KHz
25
LXT
200KHz
25
455KHz
20~40
20~150
1.0MHz
15~30
2.0MHz
15
Crystal Oscillator
HXT
4.0MHz
15
OSCI
7404
XTAL
7404
330
C
EM78458
EM78459
Fig. 20 Circuit for Crystal/Resonator-Series Mode
OSCI
7404
XTAL
C1
C2
10K
4.7K
Vdd
10K
EM78458
EM78459
Fig. 21 Circuit for Crystal/Resonator-Parallel Mode
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