ZHCSIR4Q July 1995 – September 2018 SN54LVCH245A , SN74LVCH245A
PRODUCTION DATA.
請參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
Standard CMOS inputs are high impedance, and these inputs are typically modeled as a resistor in parallel with the input capacitance given in the Electrical Characteristics: SN74LVCH245A. The worst case resistance is calculated with the maximum input voltage, given in the Absolute Maximum Ratings, and the maximum input leakage current, given in the Electrical Characteristics: SN74LVCH245A, using ohm's law (R = V ÷ I).
Signals applied to the inputs need to have fast edge rates, as defined by Δt/Δv in Recommended Operating Conditions: SN54LVCH245A to avoid excessive current consumption and oscillations. If a slow or noisy input signal is required, a device with a Schmitt-trigger input should be used to condition the input signal prior to the standard CMOS input.