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參數(shù)資料
| 型號(hào)： | 74AHCT3G04 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | INVERTER |
| 中文描述： | 反相器 |
| 文件頁數(shù)： | 16/21頁 |
| 文件大小： | 137K |
| 代理商： | 74AHCT3G04 |
2004 Oct 18
16
Philips Semiconductors
Product specification
Inverting Schmitt trigger
74AHC3G14; 74AHCT3G14
APPLICATION INFORMATION
The slow input rise and fall times cause additional power
dissipation. This can be calculated using the following
formula:
P
ad
= f
i
×
(t
r
×
I
CC(AV)
+ t
f
×
I
CC(AV)
)
×
V
CC
Where:
P
ad
= additional power dissipation (
μ
W);
f
i
= input frequency (MHz);
t
r
= input rise time (ns); 10 % to 90 %;
t
f
= input fall time (ns); 90 % to 10 %;
I
CC(AV)
= average additional supply current (
μ
A).
Average I
CC
differs with positive or negative input
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.
Fig.15 Average I
CC
for AHC3G Schmitt-trigger
devices.
handbook, halfpage
ICC(AV)
(
μ
A)
0
2.0
4.0
6.0
VCC (V)
150
50
0
100
MNA036
positive-going
edge
negative-going
edge
Linear change of V
I
between 0.1V
CC
to 0.9V
CC
.
Fig.16 Average I
CC
for AHCT3G Schmitt-trigger
devices.
handbook, halfpage
ICC(AV)
(
μ
A)
0
4
6
2
VCC (V)
100
50
150
0
MNA058
positive-going
edge
negative-going
edge
Linear change of V
I
between 0.1V
CC
to 0.9V
CC
.
Fig.17 Relaxation oscillator using the
AHC3G/AHCT3G14.
For AHC3G:
For AHCT3G:
f
1
T
×
RC
0.55
≈
=
f
1
T
×
RC
0.60
≈
=
handbook, halfpage
MNA035
R
C
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