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74LVCH244ABX 数据表(PDF) 7 Page - NXP Semiconductors |
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74LVCH244ABX 数据表(HTML) 7 Page - NXP Semiconductors |
7 / 18 page 74LVC_LVCH244A_6 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 06 — 13 August 2009 7 of 18 NXP Semiconductors 74LVC244A; 74LVCH244A Octal buffer/line driver; 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 (74LVCH244A). 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 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 8. Symbol Parameter Conditions −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[2] Max Min Max tpd propagation delay nAn to nYn; see Figure 6 [1] VCC = 1.2 V - 17.0 - - - ns VCC = 2.7 V 1.5 3.3 6.9 1.5 9.0 ns VCC = 3.0 V to 3.6 V [3] 1.5 2.8 5.9 1.5 7.5 ns ten enable time nOE to nYn; see Figure 7 [1] VCC = 1.2 V - 24.0 - - - ns VCC = 2.7 V 1.5 3.3 8.6 1.5 11 ns VCC = 3.0 V to 3.6 V [3] 1.0 3.4 7.6 1.0 9.5 ns tdis disable time nOE to nYn; see Figure 7 [1] VCC = 1.2 V - 9.0 - - - ns VCC = 2.7 V 1.5 3.2 6.8 1.5 8.5 ns VCC = 3.0 V to 3.6 V [3] 1.5 2.9 5.8 1.5 7.5 ns tsk(o) output skew time [4] - - 1.0 - 1.5 ns |
类似零件编号 - 74LVCH244ABX |
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类似说明 - 74LVCH244ABX |
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