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DM74LS468 데이터시트(PDF) 3 Page - National Semiconductor (TI) |
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DM74LS468 데이터시트(HTML) 3 Page - National Semiconductor (TI) |
3 / 6 page ’LS465 and ’LS467 Switching Characteristics VCC e 5V TA e 25 C RL e 667X Symbol Parameter CL e 50 pF CL e 150 pF Units Min Max Min Max tPLH Propagation Delay Time 16 25 ns Low to High Level Output tPHL Propagation Delay Time 28 40 ns High to Low Level Output tPZH Output Enable Time 25 30 ns to High Level Output tPZL Output Enable Time 30 42 ns to Low Level Output tPHZ Output Disable Time 20 ns from High Level Output (Note 1) tPLZ Output Disable Time 27 ns from Low Level Output (Note 1) Note 1 CL e 5 pF ’LS466 (’LS96A) and ’LS468 (’LS98A) Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 2) VI Input Clamp Voltage VCC e Min II eb18 mA b 15 V VOH High Level Output VCC e Min IOH e Max 27 V Voltage VIL e Max VIH e Min VOL Low Level Output VCC e Min IOL e Max 05 V Voltage VIL e Max VIH e Min IOL e 12 mA VCC e Min 04 II Input Current Max VCC e Max VI e 7V 01 mA Input Voltage IIH High Level Input Current VCC e Max VI e 27V 20 m A IIL Low Level Input VCC e Max VI e 05V A (Note 4) b 20 Current VI e 04V A (Note 5) b 50 m A G b 50 IOZH Off-State Output Current VCC e Max VO e 24V with High Level Output VIH e Min VIL e Max 20 m A Voltage Applied IOZL Off-State Output Current VCC e Max VO e 04V with Low Level Output VIH e Min VIL e Max b 20 m A Voltage Applied IOS Short Circuit VCC e Max b 20 b 100 mA Output Current (Note 3) ICC Supply Current VCC e Max (Note 5) 13 21 mA 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 Note 4 Both G inputs are at 2V Note 5 Both G inputs are at 04V 3 |
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