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74HC244D データシート(PDF) 13 Page - NXP Semiconductors |
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74HC244D データシート(HTML) 13 Page - NXP Semiconductors |
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13 / 22 page ![]() 74HC_HCT244_3 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 03 — 22 December 2005 13 of 22 Philips Semiconductors 74HC244; 74HCT244 Octal buffer/line driver; 3-state Measurement points are given in Table 11. VOL and VOH are typical voltage output drop that occur with the output load. Fig 7. 3-state enable and disable times Table 11: Measurement points Type Input Output VM VM 74HC244 0.5VCC 0.5VCC 74HCT244 1.3 V 1.3 V 001aae014 tPLZ tPHZ outputs disabled outputs enabled VY VX outputs enabled nYn output LOW-to-OFF OFF-to-LOW nYn output HIGH-to-OFF OFF-to-HIGH nOE input VI VOL VOH VCC VM GND GND tPZL tPZH VM VM |
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