74AHCT1G14GV datasheet(9/15 Pages) NXP

No. de pieza	74AHCT1G14GV

Descripción Electrónicos	Inverting Schmitt trigger

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Fabricante Electrónico	NXP [NXP Semiconductors]

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9 / 15 page

74AHC_AHCT1G14_6

Product data sheet

Rev. 06 — 18 May 2009

9 of 15

NXP Semiconductors

74AHC1G14; 74AHCT1G14

Inverting Schmitt trigger

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 ×∆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).

Average additional ICC differs with positive or negative input transitions, as shown in

Figure 14 and Figure 15.

For 74AHC1G14 and 74AHCT1G14 used in relaxation oscillator circuit, see Figure 16.

Note to the application information:

1. All values given are typical unless otherwise speciﬁed.

Fig 12. Typical 74AHCT1G14 transfer characteristics;

VCC = 4.5 V

Fig 13. Typical 74AHCT1G14 transfer characteristics;

VCC = 5.5 V

05

VI (V)

ICC

(mA)

5

0

1

mna404

2

3

4

1234

02

6

8

0

2

4

6

mna405

4

VI (V)

ICC

(mA)

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