74LVC2G14GF datasheet(10/17 Pages) NXP

Part #	74LVC2G14GF

Description	Dual inverting Schmitt trigger with 5 V tolerant input

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Manufacturer	NXP [NXP Semiconductors]

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10 / 17 page

74LVC2G14_4

Product data sheet

Rev. 04 — 4 September 2007

10 of 17

NXP Semiconductors

74LVC2G14

Dual inverting Schmitt trigger with 5 V tolerant input

15. Application information

The slow input rise and fall times cause additional power dissipation, which can be

calculated using the following formula:

Padd =fi × (tr ×∆ICC(AV) +tf ×∆ICC(AV)) × VCC where:

Padd = additional power dissipation (µW);

fi = input frequency (MHz);

tr = input rise time (ns); 10 % to 90 %;

tf = input fall time (ns); 90 % to 10 %;

∆I

CC(AV) = average additional supply current (µA).

∆I

CC(AV) differs with positive or negative input transitions, as shown in Figure 12.

An example of a relaxation circuit using the 74LVC2G14 is shown in Figure 13.

Linear change of VI between 0.8 V to 2.0 V. All values given are typical unless otherwise speciﬁed.

(1) Positive-going edge.

(2) Negative-going edge.

Fig 12. Average ICC as a function of VCC

23

4

6

50

0

40

5

30

20

10

mnb086

∆ICC(AV)

(mA)

VCC (V)

(1)

(2)

Fig 13. Relaxation oscillator

mna035

R

C

f

1

T

---

1

0.8

RC

×

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

≈

=

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74LVC2G14GF Datasheet(PDF) 10 Page - NXP Semiconductors

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