74LVCU04A_15 datasheet(9/17 Pages) PHILIPS

Part #	74LVCU04A

Description	Hex inverter

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Manufacturer	PHILIPS [NXP Semiconductors]

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74LVCU04A

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Product data sheet

Rev. 7 — 17 November 2011

9 of 17

NXP Semiconductors

74LVCU04A

Hex inverter

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

Vo(p-p) =VCC  1.5 V centered at 0.5VCC.

GOL = loop gain.

Au = voltage amplification.

R1

 3k,R2  1M

ZL >10k; AOL =20(typ.)

Typical unity gain bandwidth product is 5 MHz.

Fig 10. 74LVCU04A used as linear amplifier

U04

R1

R2

VCC

ZL

GND

mna931

1

μF

A

u

G

OL

1

R1

R2

------- 1G

OL

+



+

------------------------------------------

–

=

C1 = 47 pF (typical)

C2 = 22 pF (typical)

R1 = 1to10M (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)

RS  2R.

The average ICC is approximately

3.5 + 0.05f (MHz)

 C (pF) [mA] at V

CC =3.0 V.

Fig 11. 74LVCU04A used as crystal oscillator

Fig 12. 74LVCU04A used as astable multivibrator

mna932

U04

out

R2

R1

C1

C2

U04

RS

RC

mna933

f

1

T

---

1

2.2RC

---------------



=

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