Datenblatt-Suchmaschine für elektronische Bauteile |
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54LS257A Datenblatt(PDF) 3 Page - National Semiconductor (TI) |
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54LS257A Datenblatt(HTML) 3 Page - National Semiconductor (TI) |
3 / 8 page ’LS257B Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 667X Symbol Parameter To (Output) CL e 45 pF CL e 150 pF Units Min Max Min Max tPLH Propagation Delay Time Data to 18 27 ns Low to High Level Output Output tPHL Propagation Delay Time Data to 18 27 ns High to Low Level Output Output tPLH Propagation Delay Time Select to 28 35 ns Low to High Level Output Output tPHL Propagation Delay Time Select to 35 42 ns High to Low Level Output Output tPZH Output Enable Time Output 15 27 ns to High Level Output Control to Y tPZL Output Enable Time Output 28 38 ns to Low Level Output Control to Y tPHZ Output Disable Time from Output 26 ns High Level Output (Note 1) Control to Y tPLZ Output Disable Time from Output 25 ns Low Level Output (Note 1) Control to Y Note 1 CL e 5 pF Recommended Operating Conditions Symbol Parameter DM54LS258B DM74LS258B 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 1 b 26 mA IOL Low Level Output Current 12 24 mA TA Free Air Operating Temperature b 55 125 0 70 C ’LS258B Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) VI Input Clamp Voltage VCC e Min II eb18 mA b 15 V VOH High Level Output VCC e Min IOH e Max DM54 24 34 V Voltage VIL e Max VIH e Min DM74 24 31 VOL Low Level Output VCC e Min IOL e Max DM54 025 04 Voltage VIL e Max VIH e Min DM74 035 05 V IOL e 12 mA VCC e Min DM74 025 04 II Input Current Max VCC e Max Select 02 mA Input Voltage VI e 7V Other 01 IIH High Level Input VCC e Max Select 40 m A Current VI e 27V Other 20 3 |
Ähnliche Teilenummer - 54LS257A |
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Ähnliche Beschreibung - 54LS257A |
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