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74AHC139 Fiches technique(PDF) 7 Page - NXP Semiconductors |
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74AHC139 Fiches technique(HTML) 7 Page - NXP Semiconductors |
7 / 14 page 74AHC_AHCT139_2 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 02 — 9 May 2008 7 of 14 NXP Semiconductors 74AHC139; 74AHCT139 Dual 2-to-4 line decoder/demultiplexer 10. Dynamic characteristics [1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [2] tpd is the same as tPLH and tPHL. [3] 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(CL × VCC2 × fo) = sum of the outputs. Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7. Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max 74AHC139 tpd propagation delay nAn to nYn; see Figure 5 [2] VCC = 3.0 V to 3.6 V CL = 15 pF - 5.5 11.0 1.0 13.0 1.0 14.0 ns CL = 50 pF - 7.9 14.5 1.0 16.5 1.0 18.5 ns VCC = 4.5 V to 5.5 V CL = 15 pF - 3.9 7.2 1.0 8.5 1.0 9.0 ns CL = 50 pF - 5.6 9.2 1.0 10.5 1.0 11.5 ns nEtonYn; see Figure 6 [2] VCC = 3.0 V to 3.6 V CL = 15 pF - 4.8 9.2 1.0 11.0 1.0 11.5 ns CL = 50 pF - 6.9 12.7 1.0 14.5 1.0 16.0 ns VCC = 4.5 V to 5.5 V CL = 15 pF - 3.4 6.3 1.0 7.5 1.0 8.0 ns CL = 50 pF - 4.9 8.3 1.0 9.5 1.0 10.5 ns CPD power dissipation capacitance fi = 1 MHz; VI = GND to VCC [3] -26 - - - - - pF 74AHCT139; VCC = 4.5 V to 5.5 V tpd propagation delay nAn to nYn; see Figure 5 [2] CL = 15 pF - 4.7 7.2 1.0 8.5 1.0 9.0 ns CL = 50 pF - 6.5 9.2 1.0 10.5 1.0 11.5 ns nEtonYn; see Figure 6 [2] CL = 15 pF - 3.6 6.3 1.0 7.5 1.0 8.0 ns CL = 50 pF - 5.2 8.3 1.0 9.5 1.0 10.5 ns CPD power dissipation capacitance fi = 1 MHz; VI = GND to VCC [3] -23 - - - - - pF |
Numéro de pièce similaire - 74AHC139_08 |
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Description similaire - 74AHC139_08 |
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