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DM54LS138N 数据表(PDF) 3 Page - National Semiconductor (TI) |
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DM54LS138N 数据表(HTML) 3 Page - National Semiconductor (TI) |
3 / 8 page ’LS138 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) Levels RL e 2kX Symbol Parameter To (Output) of Delay CL e 15 pF CL e 50 pF Units Min Max Min Max tPLH Propagation Delay Time Select to 218 27 ns Low to High Level Output Output tPHL Propagation Delay Time Select to 227 40 ns High to Low Level Output Output tPLH Propagation Delay Time Select to 318 27 ns Low to High Level Output Output tPHL Propagation Delay Time Select to 327 40 ns High to Low Level Output Output tPLH Propagation Delay Time Enable to 218 27 ns Low to High Level Output Output tPHL Propagation Delay Time Enable to 224 40 ns High to Low Level Output Output tPLH Propagation Delay Time Enable to 318 27 ns Low to High Level Output Output tPHL Propagation Delay Time Enable to 328 40 ns High to Low Level Output Output Recommended Operating Conditions Symbol Parameter DM54LS139 DM74LS139 Units Min Nom Max Min Nom Max VCC Supply Voltage 45 5 55 475 5 525 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 07 08 V IOH High Level Output Current b 04 b 04 mA IOL Low Level Output Current 4 8 mA TA Free Air Operating Temperature b 55 125 0 70 C 3 |
类似零件编号 - DM54LS138N |
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类似说明 - DM54LS138N |
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