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7 / 15 page 74AHC_AHCT2G126_4 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 — 27 April 2009 7 of 15 NXP Semiconductors 74AHC2G126; 74AHCT2G126 Dual buffer/line driver; 3-state [1] tpd is the same as tPLH and tPHL. ten is the same as tPZL and tPZH. tdis is the same as tPLZ and tPHZ. [2] Typical values are measured at VCC = 3.3 V. [3] Typical values are measured at VCC = 5.0 V. [4] CPD is used to determine the dynamic power dissipation PD (µW). PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in Volts. 12. Waveforms CPD power dissipation capacitance per buffer; CL = 50 pF; fi = 1 MHz; VI = GND to VCC [4] -10- - - - - pF Table 8. Dynamic characteristics …continued GND = 0 V; for test circuit see Figure 8. 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 9. Logic levels: VOL and VOH are typical output voltage levels that occur with the output load. Fig 6. Input (nA) to output (nY) propagation delays mna230 tPHL tPLH VM VM nA input nY output GND VI VOH VOL |
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