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74HC14PW Datasheet(PDF) 10 Page - NXP Semiconductors

Part No. 74HC14PW
Description  Hex inverting Schmitt trigger
Download  21 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

74HC14PW Datasheet(HTML) 10 Page - NXP Semiconductors

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74HC_HCT14
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 19 September 2012
10 of 21
NXP Semiconductors
74HC14; 74HCT14
Hex inverting Schmitt trigger
15. Application information
The slow input rise and fall times cause additional power dissipation, this can be
calculated using the following formula:
Padd =fi  (tr ICC(AV) +tf ICC(AV))  VCC where:
Padd = additional power dissipation (W);
fi = input frequency (MHz);
tr =rise time (ns); 10 %to90%;
tf = 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 12
and Figure 13.
An example of a relaxation circuit using the 74HC14; 74HCT14 is shown in Figure 14.
a. VCC =4.5 V
b. VCC =5.5 V
Fig 11. Typical 74HCT transfer characteristics
05
1.5
0
0.3
0.6
0.9
1.2
12
3
4
mna849
ICC
(mA)
VI (V)
01
2
3
6
1.8
0
0.6
0.3
1.2
1.5
0.9
45
mna850
ICC
(mA)
VI (V)


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