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74HC137D Datenblatt(PDF) 11 Page - NXP Semiconductors |
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74HC137D Datenblatt(HTML) 11 Page - NXP Semiconductors |
11 / 19 page 9397 750 13804 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Product data sheet Rev. 03 — 11 November 2004 11 of 19 Philips Semiconductors 74HC137 3-to-8 line decoder, demultiplexer with address latches; inverting [1] CPD is used to determine the dynamic power dissipation (PD in µW). 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; ∑(CL × VCC2 × fo) = sum of outputs. Tamb = −40 °C to +125 °C tPHL, tPLH propagation delay An to Yn see Figure 6 VCC = 2.0 V - - 270 ns VCC = 4.5 V - - 54 ns VCC = 6.0 V - - 46 ns propagation delay LE to Yn see Figure 7 VCC = 2.0 V - - 285 ns VCC = 4.5 V - - 57 ns VCC = 6.0 V - - 48 ns propagation delay E1 to Yn see Figure 7 VCC = 2.0 V - - 220 ns VCC = 4.5 V - - 44 ns VCC = 6.0 V - - 38 ns propagation delay E2 to Yn see Figure 6 VCC = 2.0 V - - 220 ns VCC = 4.5 V - - 44 ns VCC = 6.0 V - - 38 ns tTHL, tTLH output transition time see Figure 6 VCC = 2.0 V - - 110 ns VCC = 4.5 V - - 22 ns VCC = 6.0 V - - 19 ns tW LE pulse width HIGH see Figure 8 VCC = 2.0 V - - 75 ns VCC = 4.5 V - - 15 ns VCC = 6.0 V - - 13 ns tsu set-up time An to LE see Figure 8 VCC = 2.0 V - - 75 ns VCC = 4.5 V - - 15 ns VCC = 6.0 V - - 13 ns th hold time An to LE see Figure 8 VCC = 2.0 V - - 45 ns VCC = 4.5 V - - 9 ns VCC = 6.0 V - - 8 ns Table 8: Dynamic characteristics …continued GND = 0 V; tr =tf = 6 ns; CL = 50 pF. Symbol Parameter Conditions Min Typ Max Unit |
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