3.3-V, 4:1, 2-channel FET bus switch with level shifter

The SN74CB3T3253 is a high-speed

TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance

(ron), allowing for minimal propagation delay. The device fully

supports mixed-mode signal operation on all data I/O ports by providing voltage

translation that tracks VCC. The SN74CB3T3253 supports systems using 5V

TTL, 3.3V LVTTL, and 2.5V CMOS switching standards, as well as user-defined

switching levels (see Typical

DC Voltage-Translation Characteristics).

This device is fully specified for

partial-power-down applications using Ioff. The Ioff feature

establishes that damaging current does not backflow through the device when it is

powered down. The device has isolation during power off.