Nexperia

74LVC2G14

Dual inverting Schmitt trigger with 5 V tolerant input

14. Application information

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

the following formula:

Padd = fi × (tr × ΔICC(AV) + tf × ΔICC(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 %;

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

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

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

2

3

4

6

50

0

40

5

30

20

10

mnb086

ΔICC(AV)

(mA)

VCC (V)

(1)

(2)

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

mna035

R

C

For K-factor, see Fig. 14

Fig. 13. Relaxation oscillator

aaa-022055

0

1

2

3

4

5

6

0

0.2

0.4

0.6

0.8

1

1.2

VCC (V)

K-factor

K-factor

Fig. 14. Typical K-factor for relaxation oscillator

74LVC2G14

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© Nexperia B.V. 2022. All rights reserved

Product data sheet

Rev. 13 — 24 January 2022

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