Datasheet

74LVC1GX04 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 21 August 2013 10 of 18
NXP Semiconductors
74LVC1GX04
X-tal driver
13. Application information
Crystal controlled oscillator circuits are widely used in clock pulse generators because of
their excellent frequency stability and wide operating frequency range. The 74LVC1GX04
provides the additional advantages of low power dissipation, stable operation over a wide
range of frequency and temperature, and a very small footprint. This application
information describes crystal characteristics, design and testing of crystal oscillator
circuits based on the 74LVC1GX04.
13.1 Crystal characteristics
Figure 8 is the equivalent circuit of a quartz crystal.
The reactive and resistive component of the impedance of the crystal alone and the
crystal with a series and a parallel capacitance is shown in Figure 9
Fig 8. Equivalent circuit of a crystal
mnb102
C
0
C
1
R
1
L
1