74AUP2G17 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 6 — 4 December 2012 12 of 21
NXP Semiconductors
74AUP2G17
Low-power dual Schmitt trigger
15. Application information
The slow input rise and fall times cause additional power dissipation, this can be
calculated using the following formula:
P
add
=f
i
(t
r
I
CC(AV)
+t
f
I
CC(AV)
) V
CC
where:
P
add
= additional power dissipation (W);
f
i
= input frequency (MHz);
t
r
= input rise time (ns); 10 % to 90 %;
t
f
= input fall time (ns); 90 % to 10 %;
I
CC(AV)
= average additional supply current (A).
Average I
CC(AV)
differs with positive or negative input transitions, as shown in Figure 13.
(1) Positive-going edge.
(2) Negative-going edge.
Linear change of V
I
between 0.8 V and 2.0 V. All values given are typical, unless otherwise
specified.
Fig 13. Average I
CC
as a function of V
CC
001aad027
V
CC
(V)
0.8 3.82.81.8
0.1
0.2
0.3
ΔI
CC(AV)
(mA)
0
(1)
(2)
