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74ACTQ563 Fiches technique(PDF) 2 Page - Fairchild Semiconductor |
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74ACTQ563 Fiches technique(HTML) 2 Page - Fairchild Semiconductor |
2 / 7 page www.fairchildsemi.com 2 Functional Description The ACTQ563 contains eight D-type latches with 3-STATE complementary outputs. When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this condition the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is LOW the latches store the information that was present on the D inputs a setup time preceding the HIGH-to-LOW tran- sition of LE. The 3-STATE buffers are controlled by the Output Enable (OE) input. When OE is LOW, the buffers are in the bi-state mode. When OE is HIGH the buffers are in the high impedance mode but that does not interfere with entering new data into the latches. Function Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance NC = No Change 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 Internal Outputs Function OE LE D Q O H X X X Z High-Z H H L H Z High-Z H H H L Z High-Z H L X NC Z Latched L H L H H Transparent L H H L L Transparent L L X NC NC Latched |
Numéro de pièce similaire - 74ACTQ563 |
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Description similaire - 74ACTQ563 |
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