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74LVC2244AD 데이터시트(PDF) 8 Page - NXP Semiconductors |
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74LVC2244AD 데이터시트(HTML) 8 Page - NXP Semiconductors |
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8 / 16 page ![]() 1999 Sep 30 8 Philips Semiconductors Product specification Octal buffer/line driver with 30 Ω series termination resistors; 5 V input/output tolerant; 3-state 74LVC2244A Fig.5 The 3-state enable and disable times. handbook, full pagewidth MNA362 tPLZ tPHZ outputs disabled outputs enabled VY VX outputs enabled output LOW-to-OFF OFF-to-LOW output HIGH-to-OFF OFF-to-HIGH nOE input VI VOL VOH VCC VM GND GND tPZL tPZH VM VM Fig.6 Load circuitry for switching times. Definitions for test circuit: RL = Load resistor CL = Load capacitance including jig and probe capacitance (see Chapter “AC characteristics”). RT = Termination resistance should be equal to the output impedance Zo of the pulse generator. TEST S1 tPLH/tPHL open tPLZ/tPZL 2 × VCC tPHZ/tPZH GND VCC VI <2.7 V VCC 2.7 to 3.6 V 2.7 V handbook, full pagewidth open GND 50 pF 2 × VCC VCC VI VO MNA368 D.U.T. CL RT RL 500 Ω RL 500 Ω PULSE GENERATOR S1 |
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