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74AHCT373 Datenblatt(PDF) 9 Page - NXP Semiconductors |
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74AHCT373 Datenblatt(HTML) 9 Page - NXP Semiconductors |
9 / 17 page 74AHC_AHCT373_3 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 03 — 20 May 2008 9 of 17 NXP Semiconductors 74AHC373; 74AHCT373 Octal D-type transparant latch; 3-state [1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [2] tpd is the same as tPHL and tPLH. [3] ten is the same as tPZH and tPZL. [4] tdis is the same as tPHZ and tPLZ. [5] 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. th hold time Dn to LE; see Figure 10 VCC = 3.0 V to 3.6 V 1.0 - - 1.0 - 1.0 - ns VCC = 4.5 V to 5.5 V 1.0 - - 1.0 - 1.0 - ns CPD power dissipation capacitance fi = 1 MHz; VI = GND to VCC [5] -10 - - - - - pF 74AHCT373; VCC = 4.5 V to 5.5 V tpd propagation delay Dn to Qn; see Figure 7 [4] CL = 15 pF - 4.0 8.5 1.0 9.5 1.0 11.0 ns CL = 50 pF - 5.2 9.5 1.0 10.5 1.0 12.0 ns LE to Qn; see Figure 8 CL =15pF [4] - 4.3 12.3 1.0 13.5 1.0 15.5 ns CL = 50 pF - 5.5 13.3 1.0 14.5 1.0 17.0 ns ten enable time OE to Qn; see Figure 9 CL = 15 pF - 4.0 10.9 1.0 12.5 1.0 14.0 ns CL =50pF [4] - 5.2 11.9 1.0 13.5 1.0 15.0 ns tdis disable time OE to Qn; see Figure 9 CL = 15 pF - 4.4 10.2 1.0 11.0 1.0 13.0 ns CL = 50 pF - 6.5 11.2 1.0 12.0 1.0 14.0 ns tW pulse width LE HIGH; see Figure 8 [4] 6.5 - - 6.5 - 6.5 - ns tsu set-up time Dn to LE; see Figure 10 3.5 - - 3.5 - 3.5 - ns th hold time Dn to LE; see Figure 10 1.5 - - 1.5 - 1.5 - ns CPD power dissipation capacitance fi = 1 MHz; VI = GND to VCC [5] -12 - - - - - pF Table 7. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 11. Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max |
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