74aup1z04 NXP Semiconductors, 74aup1z04 Datasheet - Page 14

• Manufacturer Part Number: 74aup1z04
• Description: 74aup1z04 Low-power X-tal Driver With Enable And Internal Resistor
• Manufacturer: NXP Semiconductors

NXP Semiconductors
13. Application information
74AUP1Z04_1
Product data sheet
Fig 8. Test set-up for measuring forward
transconductance
V
i
0.47 F
input
13.1 Crystal characteristics
Crystal controlled oscillator circuits are widely used in clock pulse generators because of
their excellent frequency stability and wide operating frequency range. The use of the
74AUP1Z04 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 74AUP1Z04.
Figure 10
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
Fig 10. Equivalent circuit of a crystal
1 M
V
CC
output
is the equivalent circuit of a quartz crystal.
100 F
001aad595
Rev. 01 — 12 December 2006
I
o
Low-power X-tal driver with enable and internal resistor
Fig 9. Typical forward transconductance as a function
(mA/V)
g
fs
30
20
10
0
of supply voltage
C
0
0
mnb102
1
C
R
L
1
1
1
Figure 11
2
74AUP1Z04
3
© NXP B.V. 2006. All rights reserved.
V
001aad074
CC
(V)
4
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