Data Sheet

3 www.fairchildsemi.com
74VHC138
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
(Note 2)
Note 1: Absolute Maximum Ratings are values beyond which the device
may be damaged or have its useful life impaired. The databook specifica-
tions should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading vari-
ables. Fairchild does not recommend operation outside databook specifica-
tions.
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Supply Voltage (V
CC
) −0.5V to +7.0V
DC Input Voltage (V
IN
) −0.5V to +7.0V
DC Output Voltage (V
OUT
) −0.5V to V
CC
+ 0.5V
Input Diode Current (I
IK
) −20 mA
Output Diode Current (I
OK
) ±20 mA
DC Output Current (I
OUT
) ±25 mA
DC V
CC
/GND Current (I
CC
) ±75 mA
Storage Temperature (T
STG
) −65°C to +150°C
Lead Temperature (T
L
)
(Soldering, 10 seconds) 260°C
Supply Voltage (V
CC
)2.0V to +5.5V
Input Voltage (V
IN
)0V to +5.5V
Output Voltage (V
OUT
)0V to V
CC
Operating Temperature (T
OPR
) −40°C to +85°C
Input Rise and Fall Time (t
r
, t
f
)
V
CC
= 3.3V ± 0.3V 0 ∼ 100 ns/V
V
CC
= 5.0V ± 0.5V 0 ∼ 20 ns/V
Symbol Parameter
V
CC
(V)
T
A
= 25°CT
A
= −40°C to +85°C
Units Conditions
Min Typ Max Min Max
V
IH
HIGH Level Input Voltage 2.0 1.50 1.50
V
3.0 − 5.5 0.7 V
CC
0.7 V
CC
V
IL
LOW Level Input Voltage 2.0 0.50 0.50
V
3.0 − 5.5 0.3 V
CC
0.3 V
CC
V
OH
HIGH Level Output Voltage 2.0 1.9 2.0 1.9 V
IN
= V
IH
I
OH
= −50 µA
3.0 2.9 3.0 2.9 V or V
IL
4.5 4.4 4.5 4.4
3.0 2.58 2.48
V
I
OH
= −4 mA
4.5 3.94 3.80 I
OH
= −8 mA
V
OL
LOW Level Output Voltage 2.0 0.0 0.1 0.1 V
IN
= V
IH
I
OL
= 50 µA
3.0 0.0 0.1 0.1 V or V
IL
4.5 0.0 0.1 0.1
3.0 0.36 0.44
V
I
OL
= 4 mA
4.5 0.36 0.44 I
OL
= 8 mA
I
IN
Input Leakage Current 0 − 5.5 ±0.1 ±1.0 µAV
IN
= 5.5V or GND
I
CC
Quiescent Supply Current 5.5 4.0 40.0 µAV
IN
= V
CC
or GND