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UPD72012 View Datasheet(PDF) - NEC => Renesas Technology

Part Name
Description
View to exact match
UPD72012
NEC
NEC => Renesas Technology NEC
UPD72012 Datasheet PDF : 36 Pages
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Recommended Oscillator Circuit Constants
Crystal oscillator (TA = 0 to +70°C)
Manufacturer
Product name
Frequency (MHz)
DAISHINKU CORP.
AT-49
HC-49/U
4.000
4.000
X1
X2
µPD72012
Oscillator circuit constant (pF)
C1
C2
10
10
9
9
C1
C2
Cautions 1. The oscillator circuit constants, which show the conditions for stabilizing and oscillating,
do not guarantee oscillation frequency accuracy. If the mounting circuit requires oscillation
frequency accuracy, it must be possible to adjust the oscillation frequency of the oscillator
in the mounting circuit. Therefore, ask the manufacturer of the oscillator you use about this
directly.
2. When using an oscillator circuit, wire portions shown using broken lines in the figure as
follows to avoid affecting wire capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with the other signal lines.
Do not route the wring near a signal line through which a high fluctuating current flows.
Always keep the ground point of the oscillator capacitor to the same potential as VSS.
Do not ground the capacitor to a ground pattern in which a high current flows.
Do not fetch signals from the oscillator.
Data Sheet S13918EJ3V0DS
23
 

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