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74AHC_AHCT245 Datenblatt(PDF) 8 Page - NXP Semiconductors |
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74AHC_AHCT245 Datenblatt(HTML) 8 Page - NXP Semiconductors |
8 / 16 page 74AHC_AHCT245_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 28 April 2009 8 of 16 NXP Semiconductors 74AHC245; 74AHCT245 Octal bus transceiver; 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 tPLH and tPHL. [3] ten is the same as tPZL and tPZH. [4] tdis is the same as tPLZ and tPHZ. [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. 10.1 Waveforms tdis disable time OE to An; OE to Bn; signal name DIR; see Figure 6 [4] CL = 15 pF - 5.0 14.4 1.0 15.5 1.0 18.0 ns CL = 50 pF - 6.0 15.4 1.0 16.5 1.0 19.5 ns CPD power dissipation capacitance fi = 1 MHz; VI = GND to VCC [5] -15 - - - - - pF Table 7. Dynamic characteristics …continued 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 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 mna176 An, Bn input Bn, An output tPLH tPHL GND VI VM VM VM VM VOH VOL |
Ähnliche Teilenummer - 74AHC_AHCT245_15 |
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Ähnliche Beschreibung - 74AHC_AHCT245_15 |
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