UPD754264 Datasheet, PDF (47/68 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS

µPD754264
Recommended Oscillator Constants
Ceramic resonator (TA = –40 to +85°C)
Manufacturer Part Number
Murata Mfg.
Co., Ltd.
CSB1000J^Note
CSA2.00MG040
CST2.00MG040
CSA4.19MG
CST4.19MGW
CSA6.00MG
CST6.00MGW
CSA6.00MGU
CST6.00MGWU
Frequency
(MHz)
1.0
2.0
4.19
6.0
Recommended Oscillator Oscillation Voltage
Constant (pF)
Range (VDD)
C1
C2
MIN. (V) MAX. (V)
100
100
1.8
6.0
100
100
1.9
—
—
30
30
1.8
—
—
30
30
2.0
—
—
30
30
1.8
—
—
Remark
Rd = 2.2 kΩ
—
On-chip capacitor
—
On-chip capacitor
—
On-chip capacitor
—
On-chip capacitor
Note When using the CSB1000J (1.0 MHz) made by Murata Mfg. Co., Ltd. as a ceramic resonator, a limiting resistor
(Rd = 2.2 kΩ) is necessary (refer to the figure below). This resistor is not necessary when using the other
recommended resonators.
X1
X2
•
C1
CSB1000J
Rd
•
C2
•
Caution
The oscillator constants and oscillation voltage range indicate conditions for stable oscillation,
but do not guarantee oscillation frequency accuracy. If oscillation frequency accuracy is required
for actual circuits, it is necessary to adjust the oscillation frequency of the oscillator in the actual
circuit. Please contact directly the manufacturer of the resonator to be used.
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