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74LVC623ADB Folha de dados(PDF) 6 Page - NXP Semiconductors |
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74LVC623ADB Folha de dados(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Philips Semiconductors Product specification 74LVC623A Octal transceiver with dual enable (3-State) 1998 Jul 29 6 AC WAVEFORMS 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 at 0.3V 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 An, Bn INPUT VM tPHL tPLH VOL VI VM GND VOH An, Bn OUTPUT SV00747 Figure 1. Input (An, Bn) to output (Bn, An) propagation delays. tPLZ tPZL VI OEBA INPUT GND VCC OUTPUT LOW-to-OFF OFF-to-LOW VOL VOH OUTPUT HIGH-to-OFF OFF-to-HIGH GND outputs enabled outputs enabled outputs disabled tPHZ VM VM VM tPZH VX VY SV00748 Figure 2. 3-State enable and disable times for OEBA input tPLZ tPZL VI OEAB INPUT GND VCC OUTPUT LOW-to-OFF OFF-to-LOW VOL VOH OUTPUT HIGH-to-OFF OFF-to-HIGH GND outputs enabled outputs enabled outputs disabled tPHZ VM VM VM tPZH VX VY SV00749 Figure 3. 3-State enable and disable times for OEAB input 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 4. Load circuitry for switching times |
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