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74LVC125 Folha de dados(PDF) 5 Page - NXP Semiconductors |
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74LVC125 Folha de dados(HTML) 5 Page - NXP Semiconductors |
5 / 10 page Philips Semiconductors Product specification 74LVC125 Quad buffer/line driver; 3-State 1997 Mar 18 5 AC CHARACTERISTICS GND = 0 V; tr = tf = 2.5 ns; CL = 50 pF; RL = 500W; Tamb = –40_C to +85_C. LIMITS SYMBOL PARAMETER WAVEFORM VCC = 3.3V ±0.3V VCC = 2.7V VCC = 1.2V UNIT MIN TYP1 MAX MIN TYP MAX TYP tPHL tPLH Propagation delay nA to nY Figure 1, 3 3.5 6.5 3.9 7.0 ns tPZH tPZL 3-state output enable time nOE to nY Figure 2, 3 3.8 7.0 4.4 8.0 ns tPHZ tPLZ 3-state output disable time nOE to nY Figure 2, 3 3.3 5.5 4.0 6.5 ns NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25°C. 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. VX = VOL + 0.3 V at VCC ≥ 2.7 V; VX = VOL + 0.1 × VCC at VCC < 2.7 V; VY = VOH – 0.3 V at VCC ≥ 2.7 V; VY = VOH – 0.1 × VCC at VCC < 2.7 V. SV00459 VM nA INPUT nY OUTPUT VM tPLH t PHL GND Vl V OL V OH Figure 1. Input (nA) to output (nY) propagation delays. SV00458 outputs disabled outputs enabled outputs enabled tPHZ tPZH tPZL tPLZ VX VY VM VM nOE Input VI GND VCC VOL VOH GND OUTPUT HIGH-to-OFF OFF-to-HIGH OUTPUT LOW-to-OFF OFF-to-LOW VM Figure 2. 3-State enable and disable times. TEST CIRCUIT PULSE GENERATOR VI RT D.U.T. VO CL 50pF S1 2 < 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 < VCC tPHZ/tPZH tPLH/tPHL Open SY00003 VCC Figure 3. Load circuitry for switching times. |
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