1 Features
• Standard 126-type pinout
• 5-Ω switch connection between two ports
• Rail-to-rail switching on data I/O ports
• Ioff supports partial-power-down mode operation
• Latch-up performance exceeds 100 mA per JESD
78, Class II

2 Applications
• Datacenter and enterprise computing
• Broadband fixed line access
• Building automation
• Wired networking
• Motor drives

3 Description
The SN74CBTLV3126 quadruple FET bus switch
features independent line switches. Each switch is
disabled when the associated output-enable (OE)
input is low.
This device is fully specified for partial-power-down
applications using Ioff. The Ioff feature ensures that
damaging current will not backflow through the device
when it is powered down. The SN74CBTLV3126
device has isolation during power off.
To ensure the high-impedance state during power up
or power down, OE should be tied to GND through a
pull down resistor; the minimum value of the resistor
is determined by the current-sinking capability of the
driver.