74HCT14N NXP Semiconductors, 74HCT14N Datasheet - Page 17

• Manufacturer Part Number: 74HCT14N
• Description: IC, INVERTER, SCHMITT TRIGGER, DIP-14
• Manufacturer: NXP Semiconductors

Specifications of 74HCT14N

• Output Current: 4mA
• No. Of Inputs: 1
• Supply Voltage Range: 4.5V To 5.5V
• Logic Case Style: DIP
• No. Of Pins: 14
• Operating Temperature Range: -40°C To +125°C
• Logic Type: Inverter Schmitt Trigger
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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:
I
shown in Figs 16 and 17.
For 74HC/HCT14 used in a relaxation oscillator circuit,
see Fig.18.
Note to application information
All values given are typical unless otherwise specified.
2003 Oct 30
CC(AV)
handbook, halfpage
ad
P
f
t
t
I
Hex inverting Schmitt trigger
I CC(AV)
i
r
f
CC(AV)
Linear change of V
Fig.17 Average I
ad
= input frequency (MHz);
= f
= input fall time ( s); 10% to 90%;
= input rise time ( s); 10% to 90%;
( A)
400
300
200
100
= additional power dissipation ( W);
i
differs with positive or negative input transitions, as
0
(t
= average additional supply current ( A).
0
r
devices.
I
CC(AV)
I
between 0.1V
CC
+ t
2
f
for HCT Schmitt trigger
negative - going
negative - going
I
CC(AV)
CC
egde
edge
to 0.9V
positive - going
positive - going
)
4
V
egde
edge
CC
CC
.
V CC (V)
.
MNA853
6
17
handbook, halfpage
handbook, halfpage
I CC(AV)
Linear change of V
Fig.16 Average I
( A)
74HC14 : f
Fig.18 Relaxation oscillator using 74HC/HCT14.
74HCT14 : f
400
300
200
100
0
0
devices.
=
=
1
-- -
T
-- -
T
1
I
------------------ -
0.8 RC
between 0.1V
C
--------------------- -
0.67 RC
1
CC
1
2
for 74HC14 Schmitt trigger
74HC14; 74HCT14
R
CC
positive - going
to 0.9V
MNA854
edge
negative - going
negative - going
4
CC
Product specification
V CC (V)
edge
MNA852
6