74ahc3g14 NXP Semiconductors, 74ahc3g14 Datasheet - Page 16

• Manufacturer Part Number: 74ahc3g14
• Description: Inverting Schmitt Trigger
• Manufacturer: NXP Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
The slow input rise and fall times cause additional power
dissipation. This can be calculated using the following
formula:
P
Where:
Average I
transitions, as shown in Figs 15 and 16.
For AHC3G/AHCT3G14 used in relaxation oscillator
circuit, see Fig.17.
Remark to the application information
All values given are typical unless otherwise specified.
2004 Oct 18
handbook, halfpage
ad
P
f
t
t
I
Inverting Schmitt trigger
i
r
f
CC(AV)
I CC(AV)
Linear change of V
Fig.16 Average I
ad
= input frequency (MHz);
= input fall time (ns); 90 % to 10 %;
= f
= input rise time (ns); 10 % to 90 %;
( A)
= additional power dissipation ( W);
200
150
100
i
50
0
= average additional supply current ( A).
(t
0
CC
r
devices.
differs with positive or negative input
I
CC(AV)
I
between 0.1V
CC
+ t
2
f
for AHCT3G Schmitt-trigger
I
CC(AV)
CC
to 0.9V
)
positive-going
4
negative-going
V
edge
CC
CC
.
V CC (V)
edge
MNA058
6
16
handbook, halfpage
handbook, halfpage
I CC(AV)
Linear change of V
Fig.15 Average I
For AHC3G:
For AHCT3G:
Fig.17 Relaxation oscillator using the
( A)
200
150
100
50
0
0
devices.
AHC3G/AHCT3G14.
74AHC3G14; 74AHCT3G14
f
=
f
I
=
-- -
T
between 0.1V
1
-- -
T
1
CC
-------------------------- -
0.55 RC
2.0
C
-------------------------- -
0.60 RC
for AHC3G Schmitt-trigger
1
1
R
CC
to 0.9V
MNA035
4.0
positive-going
negative-going
CC
Product specification
edge
.
V CC (V)
edge
MNA036
6.0