8.1 Overview

The SN74CBTLV3253 device is a dual 1-of-4 high-speed FET multiplexer/demultiplexer. The low ON-state resistance of the switch allows connections to be made with minimal propagation delay.

The select (S0, S1) inputs control the data flow. The FET multiplexers and demultiplexers are disabled when the associated output-enable (OE) input is high.

The SN74CBTLV3253 device is fully specified for partial-power-down applications using I_off. The I_off feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.