Diodes 74AHCT08 - Manual (Page 3)

74AHCT08
Document number: DS35351 Rev. 3 - 2
3 of 8
www.diodes.com
January 2013
© Diodes Incorporated
NEW PROD
UC
T
74AHCT08
Recommended Operating Conditions
(Note 5) (@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Min Max Unit
V
CC
Supply Voltage 4.5 5.5 V
V
I
Input Voltage 0 5.5 V
V
O
Output Voltage 0 V
CC
V
Δt/ΔV Input transition rise or fall rate 20 ns/V
T
A
Operating Free-Air Temperature -40 +125 °C
Note: 5. Unused inputs should be held at V
CC
or Ground.
Electrical Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Test Conditions V
CC
T
A
= -40°C to +85°C T
A
= -40°C to +125°C
Unit
Min Max Min Max
V
IH
High-Level Input
Voltage
4.5V to 5.5V 2.0 2.0 V
V
IL
Low-Level Input
Voltage
4.5V to 5.5V 0.8 0.8 V
V
OH
High-Level
Output Voltage
I
OH
= -50μA 4.5V 4.4 4.4
V
I
OH
= -8mA 4.5V 3.80 3.70
V
OL
Low-Level Output
Voltage
I
OL
= 50μA 4.5V 0.1 0.1
V
I
OL
= 8mA 4.5V 0.44 0.55
I
I
Input Current V
I
=GND to 5.5V 3.6V ±1 ±2 μA
I
CC
Supply Current V
I
= GND or V
CC,
I
O
= 0 3.6V 20 40 μA
ΔI
CC
Additional Supply
Current One input at V
CC
-2.1V
Other pins at V
CC
or GND
5.5V 1.35 5 mA
Operating Characteristics
Parameter
Test
Conditions
V
CC
= 5.5V
Unit
Typ
C
pd
Power Dissipation
Capacitance per Gate
f = 1MHz 14.8 pF
C
i
Input Capacitance
V
i
= V
CC
– or
GND
4.0 pF
Switching Characteristics
Symbol Parameter
Test
Conditions
V
CC
T
A
= +25°C -40°C to +85°C -40°C to +125°C Unit
Min Typ Max Min Max Min Max
t
PD
Propagation
Delay A
N
to Y
N
Figure 1
C
L
= 15pF
4.5V to 5.5V 0.5 3.4 6.9 0.5 8.0 0.5 9.0
ns
Figure 1
C
L
= 50pF
4.5V to 5.5V 0.5 4.9 10.0 0.5 10.0 0.5 11.0