The SNx4AHC125 devices are quadruple bus buffer gates featuring independent line drivers
with 3-state outputs. Each output is disabled when the associated output-enable
(OE) input is high. When OE is low, the respective
gate passes the data from the A input to its Y output.
To ensure the high-impedance state during power up or power down,
OE must be tied to VCC through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking capability of the driver.
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