74AUP1G17 Philips Semiconductors, 74AUP1G17 Datasheet - Page 15

• Manufacturer Part Number: 74AUP1G17
• Description: Low-power Schmitt-trigger buffer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
16. Application information
9397 750 14677
Product data sheet
The slow input rise and fall times cause additional power dissipation, this can be
calculated using the following formula:
P
Average I
Fig 12. Average I
ad
P
f
t
t
I
i
r
f
CC(AV)
ad
= input frequency (MHz);
= input fall time (ns); 90 % to 10 %;
= input rise time (ns); 10 % to 90 %;
= f
(1) Positive-going edge.
(2) Negative-going edge.
= additional power dissipation ( W);
i
= average additional supply current ( A).
(t
CC
r
differs with positive or negative input transitions, as shown in
I
CC(AV)
CC
as a function of V
+ t
(mA)
I
CC
f
1.2
0.8
0.4
Rev. 01 — 26 July 2005
0
0.8
I
CC(AV)
)
V
CC
1.8
CC
where:
2.8
Low-power Schmitt-trigger buffer
V
(1)
(2)
CC
001aad027
(V)
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
3.8
74AUP1G17
Figure
12.
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