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74LVC4245APW Datasheet(PDF) 8 Page - NXP Semiconductors |
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74LVC4245APW Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 17 page 74LVC4245A_6 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 06 — 18 January 2008 8 of 17 NXP Semiconductors 74LVC4245A Octal dual supply translating transceiver; 3-state [1] Typical values are measured at Tamb =25 °C, VCCA = 5.0 V, and VCCB = 2.7 V and 3.3 V respectively. [2] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. [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 Volts N = number of inputs switching Σ(C L × VCC 2 × f o) = sum of the outputs 11. AC waveforms tsk(o) output skew time [2] - - 1.0 - 1.5 ns CPD power dissipation capacitance 5 V port: Bn to An; VI = GND to VCCA; VCCA = 5.0 V [3] outputs enabled - - 17 - - - pF outputs disabled - - 5 - - - pF 3 V port: An to Bn; VI = GND to VCCB; VCCB = 3.3 V [3] outputs enabled - - 17 - - - pF outputs disabled - - 5 - - - pF Table 7. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V). VCCA = 4.5 V to 5.5 V; tr = tf ≤ 2.5 ns. For test circuit see Figure 8. Symbol Parameter Conditions VCCB −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Fig 5. Supply operation area 1.5 2.7 5.7 Complies with TTL levels 3.9 0.9 mna454 3.9 2.1 4.5 5.1 3.3 1.5 2.1 2.7 3.3 3.6 1.2 1.8 2.4 3.0 VCCA (V) VCCB (V) VCCA ≥ VCCB Full operation |
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