The 74ALVC16835A is a 18–bit registered driver. Data flow is controlled by active low output enable (OE), active low latch enable (LE) and clock inputs (CP).
When LE is LOW, the A to Y data flow is transparent. When LE is HIGH and CP is held at LOW or HIGH, the data is latched; on the LOW to HIGH transient of CP the A-data is stored in the latch/flip-flop.
When OE is LOW the outputs are active. When OE is HIGH, the outputs go to the high impedance OFF–state. Operation of the OE input does not affect the state of the latch/flip-flop.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.