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.