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74ALVC245PW Datasheet(PDF) 6 Page - NXP Semiconductors |
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74ALVC245PW Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 14 page 74ALVC245_2 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 02 — 7 January 2008 6 of 14 NXP Semiconductors 74ALVC245 Octal bus transceiver; 3-state 10. Dynamic characteristics [1] All typical values are measured at Tamb = 25 °C and VCC = 1.8 V, 2.5 V, 2.7 V and 3.3 V. [2] tpd is the same as tPLH and tPHL. ten is the same as tPZL and tPZH. tdis is the same as tPLZ and tPHZ. [3] 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. Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7. Symbol Parameter Conditions −40 °C to +85 °C Unit Min Typ[1] Max tpd propagation delay An to Bn; Bn to An; see Figure 5 [2] VCC = 1.65 V to 1.95 V 1.0 2.7 6.0 ns VCC = 2.3 V to 2.7 V 1.0 2.1 3.5 ns VCC = 2.7 V 1.0 3.0 3.6 ns VCC = 3.0 V to 3.6 V 1.0 2.3 3.4 ns ten enable time OE to An; OE to Bn; see Figure 6 [2] VCC = 1.65 V to 1.95 V 1.0 4.0 8.6 ns VCC = 2.3 V to 2.7 V 1.0 3.0 6.0 ns VCC = 2.7 V 1.0 2.6 6.3 ns VCC = 3.0 V to 3.6 V 1.0 2.9 5.5 ns tdis disable time OE to An; OE to Bn; see Figure 6 [2] VCC = 1.65 V to 1.95 V 1.0 4.4 8.0 ns VCC = 2.3 V to 2.7 V 1.0 2.3 4.8 ns VCC = 2.7 V 1.0 3.3 5.3 ns VCC = 3.0 V to 3.6 V 1.0 3.2 5.5 ns CPD power dissipation capacitance per buffer; VI = GND to VCC;VCC = 3.3 V [3] outputs enabled - 25 - pF outputs disabled - 1 - pF |
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