Nexperia

74LVC1G14

Single Schmitt-trigger inverter

13. Application information

The slow input rise and fall times cause additional power dissipation, this 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).

Average ΔICC(AV) differs with positive or negative input transitions, as shown in Fig. 13.

An example of a relaxation circuit using the 74LVC1G14 is shown in Fig. 14.

0

2

6

12

0

8

6

4

2

10

mna642

4

VCC (V)

average

ICC

(mA)

negative-going

edge

positive-going

edge

Linear change of VI between 0.8 V to 2.0 V.

All values given are typical unless otherwise specified.

Fig. 13. Average additional supply current as a function of supply voltage

mna035

R

C

For K-factor, see Fig. 15.

Fig. 14. Relaxation oscillator

aaa-021985

1

2

3

4

5

6

0

0.2

0.4

0.6

0.8

1

1.2

VCC (V)

KK

Fig. 15. Typical K-factor for relaxation oscillator

74LVC1G14

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© Nexperia B.V. 2022. All rights reserved

Product data sheet

Rev. 17 — 20 January 2022

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