MC74HC4060A_16 Datasheet, PDF (7/11 Pages) ON Semiconductor – 14-Stage Binary Ripple Counter With Oscillator

MC74HC4060A
TABLE 1. CRYSTAL OSCILLATOR AMPLIFIER SPECIFICATIONS (T_A = 25°C; Input = Pin 11, Output = Pin 10)
Type
Positive Reactance (Pierce)
Input Resistance, R_in
Output Impedance, Z_out (4.5V Supply)
Input Capacitance, C_in
Output Capacitance, C_out
Series Capacitance, C_a
Open Loop Voltage Gain with Output at Full Swing, α
60MW Minimum
200W (See Text)
5pF Typical
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
R_S
L_S C_S
1
2
C_O
1 Re
Xe 2
Value are supplied by crystal manufacturer (parallel resonant crystal).
Figure 8. Equivalent Crystal Networks
R_S
-jX_C2 R
jX_Ls
-jX_Co
Z_load
-jX_Cs
-jX_C
R_load
X_load
NOTE: C = C1 + C_in and R = R1 + R_out. C_o is considered as part of
the load. C_a and R_f typically have minimal effect below 2MHz.
Figure 9. Series Equivalent Crystal Load
C_a
C_in
C_out
Values are listed in Table 1.
Figure 10. Parasitic Capacitances of the Amplifier
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