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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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74HC2G126DP датащи(PDF) 11 Page - NXP Semiconductors |
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74HC2G126DP датащи(HTML) 11 Page - NXP Semiconductors |
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11 / 20 page  2003 Mar 03 11 Philips Semiconductors Product specification Dual buffer/line driver; 3-state 74HC2G126; 74HCT2G126 handbook, full pagewidth MNA949 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 VOL VOH VCC VI VM GND GND tPZL tPZH VM VM Fig.6 The 3-state enable and disable times. For 74HC2G126: VM = 50%; VI = GND to VCC For 74HCT2G126: VM = 1.3 V; VI = GND to 3.0 V. handbook, full pagewidth open GND VCC VCC VI VO MNA232 D.U.T. CL RT RL = 1000 Ω PULSE GENERATOR S1 Fig.7 Load circuitry for switching times. Definitions for test circuit: CL = Load capacitance including jig and probe capacitance (see “AC characteristics” for values). RL = Load resistance (see “AC characteristics” for values). RT = Termination resistance should be equal to the output impedance Zo of the pulse generator. TEST S1 tPLH/tPHL open tPLZ/tPZL VCC tPHZ/tPZH GND |
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