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74HC2G02DC Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HC2G02DC Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 13 page 74HC_HCT2G02_4 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 — 11 May 2009 6 of 13 NXP Semiconductors 74HC2G02; 74HCT2G02 Dual 2-input NOR 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 74HCT2G02 tpd propagation delay nA and nB to nY; see Figure 6 [2] VCC = 4.5 V - 12 24 - 29 ns VCC = 5.0 V; CL = 15 pF - 12 - - - ns tt transition time VCC = 4.5 V; see Figure 6 [3] - 6 19 - 22 ns CPD power dissipation capacitance VI = GND to VCC − 1.5 V [4] -10- - - pF Table 8. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7. 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. VOL and VOH are typical output voltage levels that occur with the output load. Fig 6. Propagation delay data input (nA, nB) to data output (nY) and transition time output (nY) 001aae759 tPLH tPHL VM VM 90% 10% VM VM nY output nA, nB input VI GND VOH VOL tTLH tTHL Table 9. Measurement points Type Input Output VM VM 74HC2G02 0.5 × V CC 0.5 × V CC 74HCT2G02 1.3 V 1.3 V |
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