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74LV14 Datasheet(PDF) 10 Page - NXP Semiconductors

Part # 74LV14
Description  Hex inverting Schmitt trigger
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74LV14 Datasheet(HTML) 10 Page - NXP Semiconductors

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74LV14
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 12 December 2011
10 of 19
NXP Semiconductors
74LV14
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 13.
An example of a relaxation circuit using the 74LV14 is shown in Figure 14.
(1) Positive-going edge.
(2) Negative-going edge.
Fig 13. Average additional supply current as a function of VCC
001aah097
VCC (V)
1.0
3.0
2.5
1.5
2.0
50
25
75
100
ΔICC(AV)
(
μA)
0
(1)
(2)
Fig 14. Relaxation oscillator
mna035
R
C
f
1
T
---
1
0.8
RC
---------------------
=


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