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 | b55§C to a125§C |
54LS | |
DM74LS | 0§C to a70§C |
Storage Temperature Range | b65§C to a150§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 |
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| DM74LS14 |
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| Min | Nom | Max | Min | Nom |
| Max |
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VCC | Supply Voltage | 4.5 | 5 | 5.5 | 4.75 | 5 |
| 5.25 | V |
VTa | 1.5 | 1.6 | 2.0 | 1.4 | 1.6 |
| 1.9 | V | |
| Threshold Voltage (Note 1) |
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VTb | 0.6 | 0.8 | 1.1 | 0.5 | 0.8 |
| 1 | V | |
| Threshold Voltage (Note 1) |
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HYS | Input Hysteresis (Note 1) | 0.4 | 0.8 |
| 0.4 | 0.8 |
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IOH | High Level Output Current |
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IOL | Low Level Output Current |
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| 8 | mA |
TA | Free Air Operating Temperature | b55 |
| 125 | 0 |
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| 70 | §C |
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol | Parameter | Conditions |
| Min | Typ | Max | Units |
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VI | Input Clamp Voltage | VCC e Min, II e b18 mA |
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| b1.5 | V |
VOH | High Level Output | VCC e Min, IOH e Max | 54LS | 2.5 | 3.4 |
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| Voltage | VIL e Max | DM74 | 2.7 | 3.4 |
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VOL | Low Level Output | VCC e Min, IOL e Max | 54LS |
| 0.25 | 0.4 |
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| Voltage | VIH e Min | DM74 |
| 0.35 | 0.5 | V |
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| VCC e Min, IOL e 4 mA | DM74 |
| 0.25 | 0.4 |
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ITa | Input Current at | VCC e 5V, VI e VTa | DM74 |
| b0.14 |
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ITb | Input Current at | VCC e 5V, VI e VTb | DM74 |
| b0.18 |
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II | Input Current @ Max | VCC e Max, VI e 7V | DM74 |
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| 0.1 | mA |
| Input Voltage | VCC e Max, VI e 10.0V | 54LS |
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IIH | High Level Input Current | VCC e Max, VI e 2.7V |
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| 20 | mA |
IIL | Low Level Input Current | VCC e Max, VI e 0.4V |
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| b0.4 | mA |
IOS | Short Circuit | VCC e Max | 54LS | b20 |
| b100 | mA |
| Output Current | (Note 3) | DM74 | b20 |
| b100 | |
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ICCH | Supply Current with | VCC e Max |
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| 8.6 | 16 | mA |
| Outputs High |
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ICCL | Supply Current with | VCC e Max |
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| 12 | 21 | mA |
| Outputs Low |
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Note 1: VCC e 5V. |
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Note 2: All typicals are at VCC e 5V, TA e 25§C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
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