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74AHC1G14GW Scheda tecnica(PDF) 9 Page - NXP Semiconductors |
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74AHC1G14GW Scheda tecnica(HTML) 9 Page - NXP Semiconductors |
9 / 15 page 74AHC_AHCT1G14_6 © NXP B.V. 2009. All rights reserved. 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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