MC54HC4060A データシートの表示（PDF） - Motorola => Freescale

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MC54HC4060A

14−Stage Binary Ripple Counter With Oscillator

Motorola => Freescale 

MC54/74HC4060A

TABLE 1. CRYSTAL OSCILLATOR AMPLIFIER SPECIFICATIONS (TA = 25°C; Input = Pin 11, Output = Pin 10)

Type

Positive Reactance (Pierce)

Input Resistance, Rin

Output Impedance, Zout (4.5V Supply)

Input Capacitance, Cin

60MΩ Minimum

200Ω (See Text)

5pF Typical

Output Capacitance, Cout

Series Capacitance, Ca

Open Loop Voltage Gain with Output at Full Swing, α

7pF Typical

5pF Typical

3Vdc Supply

4Vdc Supply

5Vdc Supply

6Vdc Supply

5.0 Expected Minimum

4.0 Expected Minimum

3.3 Expected Minimum

3.1 Expected Minimum

PIERCE CRYSTAL OSCILLATOR DESIGN

1

2

RS

LS CS

1

2

CO

1 Re

Xe 2

Value are supplied by crystal manufacturer (parallel resonant crystal).

Figure 8. Equivalent Crystal Networks

RS

jXLs

–jXCs

Zload

–jXCo

–jXC2 R

–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 2MHz.

Figure 9. Series Equivalent Crystal Load

Ca

Cin

Cout

Values are listed in Table 1.

Figure 10. Parasitic Capacitances of the Amplifier

High–Speed CMOS Logic Data

3–7

DL129 — Rev 6

MOTOROLA

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