|
74HC_HCT2G14_15 Datasheet, PDF (13/21 Pages) NXP Semiconductors – Dual inverting Schmitt trigger | |||
|
◁ |
NXP Semiconductors
74HC2G14; 74HCT2G14
Dual inverting Schmitt trigger
16. Application information
The slow input rise and fall times cause additional power dissipation, this can be
calculated using the following formula:
Padd = fi ï´ (tr ï´ ïICC(AV) + tf ï´ ïICC(AV)) ï´ VCC where:
Padd = additional power dissipation (ïW);
fi = input frequency (MHz);
tr = input rise time (ns); 10 % to 90 %;
tf = input fall time (ns); 90 % to 10 %;
ïICC(AV) = average additional supply current (ïA).
ïICC(AV) differs with positive or negative input transitions, as shown in Figure 11 and
Figure 12.
An example of a relaxation circuit using the 74HC2G14/74HCT2G14 is shown
in Figure 13.
200
ÎICC(AV)
(μA)
150
100
mna036
positive-going
edge
50
negative-going
edge
0
0
2.0
4.0
6.0
VCC (V)
(1) Positive-going edge.
(2) Negative-going edge.
Fig 11. ïICC(AV) as a function of VCC for 74HC2G14; linear change of VI between 0.1VCC to 0.9VCC
74HC_HCT2G14
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 â 14 March 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
13 of 21
|
▷ |