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74HCT125N Arkusz danych(PDF) 7 Page - NXP Semiconductors |
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74HCT125N Arkusz danych(HTML) 7 Page - NXP Semiconductors |
7 / 17 page 74HC_HCT125 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 4 — 10 January 2013 7 of 17 NXP Semiconductors 74HC125; 74HCT125 Quad buffer/line driver; 3-state [1] tpd is the same as tPLH and tPHL. [2] ten is the same as tPZH and tPZL. [3] tdis is the same as tPLZ and tPHZ. [4] tt is the same as tTHL and tTLH. [5] CPD is used to determine the dynamic power dissipation (PD in W). PD =CPD VCC2 fi N+ (CL VCC2 fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; (C L VCC 2 f o) = sum of outputs. 11. Waveforms For type 74HCT125 tpd propagation delay nA to nY; see Figure 5 [1] VCC = 4.5 V - 15 25 - 31 - 38 ns VCC =5V; CL =15pF - 12 - - - - - ns ten enable time nOE to nY; see Figure 6 [2] VCC = 4.5 V - 15 28 - 35 - 42 ns tdis disable time nOE to nY; see Figure 6 [3] VCC = 4.5 V - 15 25 - 31 - 38 ns tt transition time nY; see Figure 5 [4] - 5 12 - 15 - 18 ns CPD power dissipation capacitance CL =50pF;f= 1 MHz; VI =GND to VCC [5] -24 - - - - - pF Table 7. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 7. Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 5. Propagation delay input (nA) to output (nY) 90 % 10 % nA input nY output VI VM VM VM VM GND VOH VOL tTHL tTLH tPHL tPLH aaa-003130 |
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