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74AHCT573 Datenblatt(PDF) 9 Page - NXP Semiconductors |
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74AHCT573 Datenblatt(HTML) 9 Page - NXP Semiconductors |
9 / 19 page 74AHC_AHCT573_5 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 05 — 25 March 2010 9 of 19 NXP Semiconductors 74AHC573; 74AHCT573 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(C L × VCC 2 × f o) = sum of the outputs. th hold time Dn to LE; see Figure 10 VCC = 3.0 V to 3.6 V 1.5 - - 1.5 - 1.5 - ns VCC = 4.5 V to 5.5 V 1.5 - - 1.5 - 1.5 - ns CPD power dissipation capacitance fi = 1 MHz; VI =GND to VCC [5] -12 - - - - - pF 74AHCT573; VCC = 4.5 V to 5.5 V tpd propagation delay Dn to Qn; see Figure 7 [2] CL = 15 pF - 3.5 5.5 1 6.5 1 7.0 ns CL = 50 pF - 4.9 7.5 1 8.5 1 9.5 ns LE to Qn; see Figure 8 [2] CL = 15 pF - 3.9 6.0 1 7.0 1 7.5 ns CL = 50 pF - 5.5 8.5 1 9.5 1 11.0 ns ten enable time OE to Qn; see Figure 9 [3] CL = 15 pF - 4.1 6.5 1 7.5 1 8.5 ns CL = 50 pF - 5.9 8.5 1 10.0 1 11.0 ns tdis disable time OE to Qn; see Figure 9 [4] CL = 15 pF - 4.5 6.5 1 7.5 1 8.5 ns CL = 50 pF - 6.4 9.0 1 10.0 1 11.5 ns tW pulse width LE HIGH; see Figure 8 5.0 - - 5.0 - 5.0 - 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] -18 - - - - - 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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