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74LV245 Arkusz danych(PDF) 6 Page - NXP Semiconductors |
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74LV245 Arkusz danych(HTML) 6 Page - NXP Semiconductors |
6 / 15 page 74LV245_3 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 03 — 15 April 2009 6 of 15 NXP Semiconductors 74LV245 Octal bus transceiver; 3-state 10. Dynamic characteristics [1] All typical values are measured at Tamb =25 °C. [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] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [4] 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 Volts 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 −40 °C to +125 °C Unit Min Typ[1] Max Min Max tpd propagation delay An, Bn to Bn, An; see Figure 5 [2] VCC = 1.2 V - 45 28 - - ns VCC = 2.0 V - 15 28 - 34 ns VCC = 2.7 V - 11 19 - 24 ns VCC = 3.0 V to 3.6 V; CL =15pF [3] -7 - - - ns VCC = 3.0 V to 3.6 V [3] - 9 16 - 20 ns VCC = 4.5 V to 5.5 V [3] - 8 11 - 14 ns ten enable time OE to An, Bn; see Figure 6 [2] VCC = 1.2 V - 55 - - - ns VCC = 2.0 V - 19 31 - 39 ns VCC = 2.7 V - 14 23 - 29 ns VCC = 3.0 V to 3.6 V [3] - 10 18 - 23 ns VCC = 4.5 V to 5.5 V [3] - 8.5 14 - 18 ns tdis disable time OE to An, Bn; see Figure 6 [2] VCC = 1.2 V - 65 - - - ns VCC = 2.0 V - 24 32 - 39 ns VCC = 2.7 V - 18 24 - 29 ns VCC = 3.0 V to 3.6 V [3] - 14 20 - 24 ns VCC = 4.5 V to 5.5 V [3] - 11.5 16 - 19 ns CPD power dissipation capacitance CL = 50 pF; fi = 1 MHz; VI = GND to VCC; VCC = 3.3 V [4] -40 - - - pF |
Podobny numer części - 74LV245_15 |
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Podobny opis - 74LV245_15 |
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