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74ACTQ573MTCX Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74ACTQ573MTCX Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 12 page www.fairchildsemi.com 2 Functional Description The ACQ/ACTQ573 contains eight D-type latches with 3- STATE output buffers. When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this con- dition the latches are transparent, i.e., a latch output will change state each time its D-type input changes. When LE is LOW the latches store the information that was present on the D-type inputs at setup time preceding the HIGH-to-LOW transition of LE. The 3-STATE buffers are controlled by the Output Enable (OE) input. When OE is LOW, the buffers are enabled. When OE is HIGH the buff- ers are in the high impedance mode but this does not inter- fere with entering new data into the latches. Truth Table H = HIGH Voltage L = LOW Voltage Z = High Impedance X = Immaterial O0 = Previous O0 before HIGH-to-LOW transition of Latch Enable Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Inputs Outputs OE LE D On LH H H LH L L LL X O0 HX X Z |
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Similar Description - 74ACTQ573MTCX |
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