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74HCT3G34GD Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HCT3G34GD Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 13 page 74HC_HCT3G34_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 7 May 2009 6 of 13 NXP Semiconductors 74HC3G34; 74HCT3G34 Triple buffer gate [1] All typical values are measured at Tamb = 25 °C. [2] tpd is the same as tPLH and tPHL. [3] tt is the same as tTLH and tTHL. [4] CPD is used to determine the dynamic power dissipation (PD in µW). PD = CPD × VCC2 × fi × N + Σ(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; Σ(C L × VCC 2 × f o) = sum of outputs. 12. Waveforms 74HCT3G34 tpd propagation delay nA to nY; see Figure 5 [2] VCC = 4.5 V - 10 23 - 29 ns tt transition time nY; VCC = 4.5 V; see Figure 5 [3] - 6 19 - 25 ns CPD power dissipation capacitance VI = GND to VCC − 1.5 V [4] -9- - - pF Table 8. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 6. Symbol Parameter Conditions −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Measurement points are given in Table 9. Fig 5. Propagation delay data input (nA) to data output (nY) and transition time output (nY) 001aad982 tPLH tPHL VM VM 90 % 10 % VM VM output nY input nA VI GND VOH VOL tTLH tTHL Table 9. Measurement points Type Input Output VM VM 74HC3G34 0.5 × V CC 0.5 × V CC 74HCT3G34 1.3 V 1.3 V |
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