µPD6121, 6122
Recommended Ceramic Resonators (TA = –20 to +75 °C, VDD = 2.0 to 3.3 V)
•
µPD6121, 6122
Recommended constant [pF]
Operating voltage [V]
Maker
Product
CSB455E
C1
C2
MIN.
2.0
MAX.
3.3
Murata Seisakusho Corp.
220
220
120
220
220
220
300
220
CSB480E
2.0
3.3
Toko Corp.
CRK455
2.0
3.3
Kyocera Corp.
KBR-455BTLR
2.0
3.3
Example of external circuit
OSCI
OSCO
C1
C2
VDD
Caution If using an oscillation circuit, wire the area enclosed in the dotted line in the figure in the manner
indicated below in order to avoid negative effects such as from stray capacitance of wires.
•
•
Keep wiring as short as possible.
Do not cross other signal lines. Do not design wiring close to lines with large fluctuating
current.
•
•
Make sure that the connection point of the oscillation circuit’s capacitor has the same
potential as VDD.
Do not extract signals from the oscillation circuit.
20
NEC [ NEC ]
