The SN74CB3Q16211 device is a
high-bandwidth FET bus switch utilizing 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 SN74CB3Q16211 device provides an optimized interface solution
ideally suited for broadband communications, networking, and data-intensive
computing systems.The SN74CB3Q16211 device is organized
as two 12-bit bus switches with separate output-enable (1 OE, 2
OE) inputs. It can be used as two 12-bit bus switches or as
one 24-bit bus switch. When OE is low, the associated 12-bit
bus switch is ON and the A port is connected to the B port, allowing bidirectional
data flow between ports. When OE is high, the associated 12-bit
bus switch is OFF, and a high-impedance state exists between the A and B ports.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.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.
