The SN74CB3Q3305 device is a high-bandwidth FET bus switch using a charge pump to elevate
the gate voltage of the pass transistor, providing a low and flat ON-state resistance
(ron). The low and flat ON-state resistance allows for minimal propagation
delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also
features low data I/O capacitance to minimize capacitive loading and signal distortion on the data
bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3305 device provides
an optimized interface solution ideally suited for broadband communications, networking, and
data-intensive computing systems.
This device is fully specified for partial-power-down applications using
Ioff. The Ioff circuitry prevents damaging current
backflow through the device when it is powered down. The device has isolation during power
To ensure the high-impedance state during power up or power down, OE should be tied to
GND through a pulldown resistor; the minimum value of the resistor is determined by the
current-sourcing capability of the driver.
View datasheet View product folder