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74LVC139DB Scheda tecnica(PDF) 6 Page - NXP Semiconductors |
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74LVC139DB Scheda tecnica(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Philips Semiconductors Product specification 74LVC139 Dual 2-to-4 line decoder/demultiplexer 1998 Apr 28 6 AC WAVEFORMS VM = 1.5 V at VCC w 2.7 V VM = 0.5 × VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load. SV00561 V M E INPUT nY OUTPUTS V M tPLH tPHL GND VI V OL V OH Figure 1. Input (nA) to output (nY) propagation delays. SV00562 V M nI0, nI1, S INPUTS nY OUTPUT V M tPLH tPHL GND VI V OL V OH Figure 2. Enable input (nE) to output (nYn) propagation delays. TEST CIRCUIT SWITCH POSITION PULSE GENERATOR RT VI D.U.T. VO CL VCC 500 Ω Open GND S1 VCC VI < 2.7V VCC TEST S1 tPLH/tPHL Open 2.7V 2.7–3.6V 50pF 500 Ω 2 * VCC SV00903 Figure 3. Load circuitry for switching times. |
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