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74LVC646AD Datasheet(PDF) 10 Page - NXP Semiconductors |
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74LVC646AD Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 16 page Philips Semiconductors Product specification 74LVC646A Octal bus transceiver/register (3-State) 1998 Jul 29 10 AC WAVEFORMS ( Continued) VM = 1.5V at VCC w 2.7V VM = 0.5V * VCC at VCC t 2.7V VOL and VOH are the typical output voltage drop that occur with the output load. VX = VOL + 0.3V at VCC w 2.7V VX = VOL + 0.1VCC at VCC < 2.7V VY = VOH – 0.3V at VCC w 2.7V VY = VOH – 0.1VCC at VCC < 2.7V SV00757 tPHZ tPZH tPZL tPLZ tPZH tPZL VX VX VOL VOL VOL VY VY VOH VI VCC GND GND VOH VOH VM VM VM VM VM tPHZ tPHZ DIR INPUT An OUTPUT Bn OUTPUT Bn OUTPUT AnOUTPUT Figure 5. Input DIR to output An, Bn 3-State enable and disable times. TEST CIRCUIT PULSE GENERATOR VI RT D.U.T. VO CL 50pF S1 2 x VCC Open GND 500 Ω 500 Ω VCC VI t 2.7V VCC 2.7V – 3.6V 2.7V Test S1 GND tPLZ/tPZL 2 x VCC tPHZ/tPZH tPLH/tPHL Open SY00003 VCC Figure 6. Load circuitry for switching times. |
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