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74LVC245APW Datasheet(PDF) 6 Page - NXP Semiconductors |
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74LVC245APW Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 17 page 74LVC_LVCH245A_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 25 August 2009 6 of 17 NXP Semiconductors 74LVC245A; 74LVCH245A Octal bus transceiver; 3-state [1] All typical values are measured at VCC = 3.3 V (unless stated otherwise) and Tamb =25 °C. [2] The bus hold circuit is switched off when VI >VCC allowing 5.5 V on the input terminal. [3] For I/O ports the parameter IOZ includes the input leakage current. [4] Valid for data inputs of bus hold parts only (74LVCH245A). Note that control inputs do not have a bus hold circuit. [5] The specified sustaining current at the data input holds the input below the specified VI level. [6] The specified overdrive current at the data input forces the data input to the opposite input state. 10. Dynamic characteristics CI input capacitance - 4.0 - - - pF CI/O input/output capacitance -10 - - - pF IBHL bus hold LOW current VCC = 3.0 V; VI = 0.8 V [4][5] 75 - - 60 - µA IBHH bus hold HIGH current VCC = 3.0 V; VI = 2.0 V [4][5] −75 - - −60 - µA IBHLO bus hold LOW overdrive current VCC = 3.6 V [4][6] 500 - - 500 - µA IBHHO bus hold HIGH overdrive current VCC = 3.6 V [4][6] −500 - - −500 - µA Table 6. Static characteristics …continued At recommended operating conditions. Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max 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[2] Max Min Max tpd propagation delay An to Bn; see Figure 5 [1] VCC = 1.2 V - 17.0 - - - ns VCC = 2.7 V 1.5 3.4 7.3 1.5 9.5 ns VCC = 3.0 V to 3.6 V [3] 1.5 2.9 6.3 1.5 8.0 ns ten enable time OE to An or Bn; see Figure 6 [1] VCC = 1.2 V - 22.0 - - - ns VCC = 2.7 V 1.5 5.0 9.5 1.5 12.0 ns VCC = 3.0 V to 3.6 V [3] 1.5 4.0 8.5 1.5 11.0 ns tdis disable time OE to An or Bn; see Figure 6 [1] VCC = 1.2 V - 12.0 - - - ns VCC = 2.7 V 1.5 3.6 8.0 1.5 10.0 ns VCC = 3.0 V to 3.6 V [3] 1.7 3.4 7.0 1.7 9.0 ns tsk(o) output skew time [4] - - 1.0 - 1.5 ns |
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