MC54HC4060 データシートの表示（PDF） - Motorola => Freescale

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MC54HC4060

14-stage binary ripple counter with oscillator

Motorola => Freescale 

MC54/74HC4060

RESET 12

11 OSC IN

10 OSC OUT 1

Rf

R1

C1

C2

9 OSC OUT 2

Figure 6. Pierce Crystal Oscillator Circuit

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Table 1. Crystal Oscillator Amplifier Specifications

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ TA = 25_C (Input = Pin 11, Output = Pin 10)

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Type

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Input Resistance, Rin

Output Impedance, Zout (4.5 V supply)

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Input Capacitance, Cin

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Output Capacitance, Cout

Series Capacitance, Ca

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ 3 Vdc supply

Open loop voltage

4 Vdc supply

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ gain with output at

5 Vdc supply

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ full swing, α

6 Vdc supply

Positive Reactance (Pierce)

60 MΩ minimum

200 Ω (see text)

5 pF typical

7 pF typical

5 pF typical

5.0 expected minimum

4.0 expected minimum

3.3 expected minimum

3.1 expected minimum

PIERCE CRYSTAL OSCILLATOR DESIGN

RS

LS

CS

1

2

1

2

1 Re Xe 2

CO

Values are supplied by crystal manufacturer (parallel resonant crys-

tal)

Figure 7. Equivalent Crystal Networks

Rs

jXLs

–jXCs

Zload

–jXC2

R

–jXCo

–jXC

Rload

Xload

NOTE: C = C1 + Cin and R = R1 + Rout. Co is considered as part of the

load. Ca and Rf typically have minimal effect below 2 MHz.

Figure 8. Series Equivalent Crystal Load

Ca

Cin

Cout

Values are listed in Table 1.

Figure 9. Parasitic Capacitances

of the Amplifier

MOTOROLA

6

High–Speed CMOS Logic Data

DL129 — Rev 6

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