3 www.fairchildsemi.com
DM74LS240 • DM74LS241
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 2: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current −15 mA
I
OL
LOW Level Output Current 24 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= −18 mA −1.5 V
HYS Hysteresis (V
T+
− V
T−
)
V
CC
= Min 0.2 0.4 V
Data Inputs Only
V
OH
HIGH Level Output Voltage V
CC
= Min, V
IH
= Min
2.7
V
IL
= Max, I
OH
= −1 mA
V
CC
= Min, V
IH
= Min
2.4 3.4 V
V
IL
= Max, I
OH
= −3 mA
V
CC
= Min, V
IH
= Min
2
V
IL
= 0.5V, I
OH
= Max
V
OL
LOW Level Output Voltage V
CC
= Min I
OL
= 12 mA 0.4
V
IL
= Max
I
OL
= Max 0.5
V
V
IH
= Min
I
OZH
Off-State Output Current, V
CC
= Max
V
O
= 2.7V 20 µA
HIGH Level Voltage Applied V
IL
= Max
I
OZL
Off-State Output Current, V
IH
= Min
V
O
= 0.4V −20 µA
LOW Level Voltage Applied
I
I
Input Current at Maximum V
CC
= Max
0.1 mA
Input Voltage V
I
= 7V
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V −0.2 mA
I
OS
Short Circuit Output Current V
CC
= Max (Note 3) −40 −225 mA
I
CC
Supply Current V
CC
= Max, Outputs HIGH 13 23
Outputs OPEN
Outputs LOW
26 44
27 46 mA
Outputs Disabled
29 50
32 54
