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74HC7541PW Datenblatt(PDF) 6 Page - NXP Semiconductors |
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74HC7541PW Datenblatt(HTML) 6 Page - NXP Semiconductors |
6 / 17 page 74HC_HCT7541 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 3 — 25 July 2011 6 of 17 NXP Semiconductors 74HC7541; 74HCT7541 Octal Schmitt trigger 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] tt is the same as tTHL and tTLH. [3] CPD is used to determine the dynamic power dissipation (PD in W): 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; (C L VCC 2 f o) = sum of outputs. 11. Waveforms 74HCT7541 tpd propagation delay An to Yn; see Figure 5 [1] VCC = 4.5 V - 19 32 40 48 ns VCC = 5.0 V; CL =15pF - 16 - - - ns ten enable time OEn to Yn; see Figure 6 [1] VCC = 4.5 V - 18 32 40 48 ns tdis disable time OEn to Yn; see Figure 6 [1] VCC = 4.5 V - 20 32 40 48 ns tt transition time VCC = 4.5 V; see Figure 5 [2] - 5 12 15 18 ns CPD power dissipation capacitance per package; VI =GND to VCC 1.5 V [3] -32 - - - pF Table 7. Dynamic characteristics GND = 0 V; CL = 50 pF; for test circuit see Figure 7. Symbol Parameter Conditions Tamb = 25 C Tamb = 40 C to +125 C Unit Min Typ Max Max (85 C) Max (125 C) Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 5. Input to output propagation delays aaa-000088 VM VM 90 % 10 % Yn output An input Vl GND VOH VOL tTHL tTLH tPLH VM VM tPHL |
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