74LVCU04A(2011) 데이터 시트보기 (PDF) - NXP Semiconductors.
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74LVCU04A Datasheet PDF : 18 Pages
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NXP Semiconductors
12. Application information
12.1 Application diagrams
Some applications for the 74LVCU04 are:
• Linear amplifier: see Figure 10
• Crystal oscillator designs; see Figure 11
• Astable multivibrator; see Figure 12
1 μF R1
R2
VCC
U04
Vo(p-p) = VCC 1.5 V centered at 0.5VCC.
Au
=
–----------------G-----O---L-----------------
1
+
R----1--
R2
1
+
GOL
GOL = loop gain.
Au = voltage amplification.
R1 3 k, R2 1 M
ZL > 10 k; AOL = 20 (typ.)
Typical unity gain bandwidth product is 5 MHz.
Fig 10. 74LVCU04A used as linear amplifier
ZL
GND
mna931
74LVCU04A
Hex inverter
R1
R2
U04
C1
C2
out
mna932
U04
U04
RS
R
C
mna933
C1 = 47 pF (typical)
C2 = 22 pF (typical)
R1 = 1 to 10 M (typical)
R2 optimum value depends on the frequency and
required stability against changes in VCC or average
minimum ICC (ICC is typically 2 mA at VCC = 3 V and f = 1
MHz)
Fig 11. 74LVCU04A used as crystal oscillator
f = -1- -------1--------
T 2.2RC
RS 2R.
The average ICC is approximately
3.5 + 0.05f (MHz) C (pF) [mA] at VCC = 3.0 V.
Fig 12. 74LVCU04A used as astable multivibrator
74LVCU04A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 17 November 2011
© NXP B.V. 2011. All rights reserved.
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