Absolute Maximum Ratings (Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range
DM54LS and 54LS b55§Ctoa
125§C
DM74LS 0§Ctoa
70§C
Storage Temperature Range b65§Ctoa
150§C
Note:
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.
Recommended Operating Conditions
Symbol Parameter DM54LS00 DM74LS00 Units
Min Nom Max Min Nom Max
VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.7 0.8 V
IOH High Level Output Current b0.4 b0.4 mA
IOL Low Level Output Current 4 8 mA
TAFree Air Operating Temperature b55 125 0 70 §C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min Typ Max Units
(Note 1)
VIInput Clamp Voltage VCC eMin, IIeb
18 mA b1.5 V
VOH High Level Output VCC eMin, IOH eMax, DM54 2.5 3.4 V
Voltage VIL eMax DM74 2.7 3.4
VOL Low Level Output VCC eMin, IOL eMax, DM54 0.25 0.4
Voltage VIH eMin DM74 0.35 0.5 V
IOL e4 mA, VCC eMin DM74 0.25 0.4
IIInput Current @Max VCC eMax, VIe7V 0.1 mA
Input Voltage
IIH High Level Input Current VCC eMax, VIe2.7V 20 mA
IIL Low Level Input Current VCC eMax, VIe0.4V b0.36 mA
IOS Short Circuit VCC eMax DM54 b20 b100 mA
Output Current (Note 2) DM74 b20 b100
ICCH Supply Current with VCC eMax 0.8 1.6 mA
Outputs High
ICCL Supply Current with VCC eMax 2.4 4.4 mA
Outputs Low
Switching Characteristics at VCC e5V and TAe25§C (See Section 1 for Test Waveforms and Output Load)
RLe2kX
Symbol Parameter CLe15 pF CLe50 pF Units
Min Max Min Max
tPLH Propagation Delay Time 310415ns
Low to High Level Output
tPHL Propagation Delay Time 310415ns
High to Low Level Output
Note 1: All typicals are at VCC e5V, TAe25§C.
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
2